| |
| /*---------------------------------------------------------------*/ |
| /*--- ---*/ |
| /*--- This file (host-amd64/isel.c) is ---*/ |
| /*--- Copyright (c) 2005 OpenWorks LLP. All rights reserved. ---*/ |
| /*--- ---*/ |
| /*---------------------------------------------------------------*/ |
| |
| /* |
| This file is part of LibVEX, a library for dynamic binary |
| instrumentation and translation. |
| |
| Copyright (C) 2004-2005 OpenWorks, LLP. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; Version 2 dated June 1991 of the |
| license. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or liability |
| for damages. See the GNU General Public License for more details. |
| |
| Neither the names of the U.S. Department of Energy nor the |
| University of California nor the names of its contributors may be |
| used to endorse or promote products derived from this software |
| without prior written permission. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
| USA. |
| */ |
| |
| #include "libvex_basictypes.h" |
| #include "libvex_ir.h" |
| #include "libvex.h" |
| |
| #include "ir/irmatch.h" |
| #include "main/vex_util.h" |
| #include "main/vex_globals.h" |
| #include "host-generic/h_generic_regs.h" |
| //.. #include "host-generic/h_generic_simd64.h" |
| #include "host-amd64/hdefs.h" |
| //.. |
| //.. |
| //.. /*---------------------------------------------------------*/ |
| //.. /*--- x87 control word stuff ---*/ |
| //.. /*---------------------------------------------------------*/ |
| //.. |
| //.. /* Vex-generated code expects to run with the FPU set as follows: all |
| //.. exceptions masked, round-to-nearest, precision = 53 bits. This |
| //.. corresponds to a FPU control word value of 0x027F. |
| //.. |
| //.. Similarly the SSE control word (%mxcsr) should be 0x1F80. |
| //.. |
| //.. %fpucw and %mxcsr should have these values on entry to |
| //.. Vex-generated code, and should those values should be |
| //.. unchanged at exit. |
| //.. */ |
| //.. |
| //.. #define DEFAULT_FPUCW 0x027F |
| //.. |
| //.. /* debugging only, do not use */ |
| //.. /* define DEFAULT_FPUCW 0x037F */ |
| |
| |
| /*---------------------------------------------------------*/ |
| /*--- misc helpers ---*/ |
| /*---------------------------------------------------------*/ |
| |
| /* These are duplicated in guest-amd64/toIR.c */ |
| static IRExpr* unop ( IROp op, IRExpr* a ) |
| { |
| return IRExpr_Unop(op, a); |
| } |
| |
| static IRExpr* binop ( IROp op, IRExpr* a1, IRExpr* a2 ) |
| { |
| return IRExpr_Binop(op, a1, a2); |
| } |
| |
| //.. static IRExpr* mkU64 ( ULong i ) |
| //.. { |
| //.. return IRExpr_Const(IRConst_U64(i)); |
| //.. } |
| //.. |
| //.. static IRExpr* mkU32 ( UInt i ) |
| //.. { |
| //.. return IRExpr_Const(IRConst_U32(i)); |
| //.. } |
| |
| static IRExpr* bind ( Int binder ) |
| { |
| return IRExpr_Binder(binder); |
| } |
| |
| |
| |
| /*---------------------------------------------------------*/ |
| /*--- ISelEnv ---*/ |
| /*---------------------------------------------------------*/ |
| |
| /* This carries around: |
| |
| - A mapping from IRTemp to IRType, giving the type of any IRTemp we |
| might encounter. This is computed before insn selection starts, |
| and does not change. |
| |
| - A mapping from IRTemp to HReg. This tells the insn selector |
| which virtual register is associated with each IRTemp |
| temporary. This is computed before insn selection starts, and |
| does not change. We expect this mapping to map precisely the |
| same set of IRTemps as the type mapping does. |
| |
| - vregmap holds the primary register for the IRTemp. |
| - vregmapHI is only used for 128-bit integer-typed |
| IRTemps. It holds the identity of a second |
| 64-bit virtual HReg, which holds the high half |
| of the value. |
| |
| - The code array, that is, the insns selected so far. |
| |
| - A counter, for generating new virtual registers. |
| |
| - The host subarchitecture we are selecting insns for. |
| This is set at the start and does not change. |
| |
| Note, this is all host-independent. (JRS 20050201: well, kinda |
| ... not completely. Compare with ISelEnv for X86.) |
| */ |
| |
| typedef |
| struct { |
| IRTypeEnv* type_env; |
| |
| HReg* vregmap; |
| HReg* vregmapHI; |
| Int n_vregmap; |
| |
| HInstrArray* code; |
| |
| Int vreg_ctr; |
| |
| VexSubArch subarch; |
| } |
| ISelEnv; |
| |
| |
| static HReg lookupIRTemp ( ISelEnv* env, IRTemp tmp ) |
| { |
| vassert(tmp >= 0); |
| vassert(tmp < env->n_vregmap); |
| return env->vregmap[tmp]; |
| } |
| |
| static void lookupIRTemp128 ( HReg* vrHI, HReg* vrLO, |
| ISelEnv* env, IRTemp tmp ) |
| { |
| vassert(tmp >= 0); |
| vassert(tmp < env->n_vregmap); |
| vassert(env->vregmapHI[tmp] != INVALID_HREG); |
| *vrLO = env->vregmap[tmp]; |
| *vrHI = env->vregmapHI[tmp]; |
| } |
| |
| static void addInstr ( ISelEnv* env, AMD64Instr* instr ) |
| { |
| addHInstr(env->code, instr); |
| if (vex_traceflags & VEX_TRACE_VCODE) { |
| ppAMD64Instr(instr); |
| vex_printf("\n"); |
| } |
| } |
| |
| static HReg newVRegI ( ISelEnv* env ) |
| { |
| HReg reg = mkHReg(env->vreg_ctr, HRcInt64, True/*virtual reg*/); |
| env->vreg_ctr++; |
| return reg; |
| } |
| |
| //.. static HReg newVRegF ( ISelEnv* env ) |
| //.. { |
| //.. HReg reg = mkHReg(env->vreg_ctr, HRcFlt64, True/*virtual reg*/); |
| //.. env->vreg_ctr++; |
| //.. return reg; |
| //.. } |
| //.. |
| //.. static HReg newVRegV ( ISelEnv* env ) |
| //.. { |
| //.. HReg reg = mkHReg(env->vreg_ctr, HRcVec128, True/*virtual reg*/); |
| //.. env->vreg_ctr++; |
| //.. return reg; |
| //.. } |
| |
| |
| /*---------------------------------------------------------*/ |
| /*--- ISEL: Forward declarations ---*/ |
| /*---------------------------------------------------------*/ |
| |
| /* These are organised as iselXXX and iselXXX_wrk pairs. The |
| iselXXX_wrk do the real work, but are not to be called directly. |
| For each XXX, iselXXX calls its iselXXX_wrk counterpart, then |
| checks that all returned registers are virtual. You should not |
| call the _wrk version directly. |
| */ |
| static AMD64RMI* iselIntExpr_RMI_wrk ( ISelEnv* env, IRExpr* e ); |
| static AMD64RMI* iselIntExpr_RMI ( ISelEnv* env, IRExpr* e ); |
| |
| static AMD64RI* iselIntExpr_RI_wrk ( ISelEnv* env, IRExpr* e ); |
| static AMD64RI* iselIntExpr_RI ( ISelEnv* env, IRExpr* e ); |
| |
| static AMD64RM* iselIntExpr_RM_wrk ( ISelEnv* env, IRExpr* e ); |
| static AMD64RM* iselIntExpr_RM ( ISelEnv* env, IRExpr* e ); |
| |
| static HReg iselIntExpr_R_wrk ( ISelEnv* env, IRExpr* e ); |
| static HReg iselIntExpr_R ( ISelEnv* env, IRExpr* e ); |
| |
| static AMD64AMode* iselIntExpr_AMode_wrk ( ISelEnv* env, IRExpr* e ); |
| static AMD64AMode* iselIntExpr_AMode ( ISelEnv* env, IRExpr* e ); |
| |
| static void iselInt128Expr_wrk ( HReg* rHi, HReg* rLo, |
| ISelEnv* env, IRExpr* e ); |
| static void iselInt128Expr ( HReg* rHi, HReg* rLo, |
| ISelEnv* env, IRExpr* e ); |
| |
| static AMD64CondCode iselCondCode_wrk ( ISelEnv* env, IRExpr* e ); |
| static AMD64CondCode iselCondCode ( ISelEnv* env, IRExpr* e ); |
| |
| //static HReg iselDblExpr_wrk ( ISelEnv* env, IRExpr* e ); |
| //static HReg iselDblExpr ( ISelEnv* env, IRExpr* e ); |
| |
| //static HReg iselFltExpr_wrk ( ISelEnv* env, IRExpr* e ); |
| //static HReg iselFltExpr ( ISelEnv* env, IRExpr* e ); |
| |
| //static HReg iselVecExpr_wrk ( ISelEnv* env, IRExpr* e ); |
| //static HReg iselVecExpr ( ISelEnv* env, IRExpr* e ); |
| |
| |
| /*---------------------------------------------------------*/ |
| /*--- ISEL: Misc helpers ---*/ |
| /*---------------------------------------------------------*/ |
| |
| static Bool sane_AMode ( AMD64AMode* am ) |
| { |
| switch (am->tag) { |
| case Aam_IR: |
| return hregClass(am->Aam.IR.reg) == HRcInt64 |
| && (hregIsVirtual(am->Aam.IR.reg) |
| || am->Aam.IR.reg == hregAMD64_RBP()); |
| case Aam_IRRS: |
| return hregClass(am->Aam.IRRS.base) == HRcInt64 |
| && hregIsVirtual(am->Aam.IRRS.base) |
| && hregClass(am->Aam.IRRS.index) == HRcInt64 |
| && hregIsVirtual(am->Aam.IRRS.index); |
| default: |
| vpanic("sane_AMode: unknown amd64 amode tag"); |
| } |
| } |
| |
| |
| /* Can the lower 32 bits be signedly widened to produce the whole |
| 64-bit value? In other words, are the top 33 bits either all 0 or |
| all 1 ? */ |
| static Bool fitsIn32Bits ( ULong x ) |
| { |
| Long y0 = (Long)x; |
| Long y1 = y0; |
| y1 <<= 32; |
| y1 >>=/*s*/ 32; |
| return toBool(x == y1); |
| } |
| |
| //.. /* Is this a 32-bit zero expression? */ |
| //.. |
| //.. static Bool isZero32 ( IRExpr* e ) |
| //.. { |
| //.. return e->tag == Iex_Const |
| //.. && e->Iex.Const.con->tag == Ico_U32 |
| //.. && e->Iex.Const.con->Ico.U32 == 0; |
| //.. } |
| |
| /* Make a int reg-reg move. */ |
| |
| static AMD64Instr* mk_iMOVsd_RR ( HReg src, HReg dst ) |
| { |
| vassert(hregClass(src) == HRcInt64); |
| vassert(hregClass(dst) == HRcInt64); |
| return AMD64Instr_Alu64R(Aalu_MOV, AMD64RMI_Reg(src), dst); |
| } |
| |
| |
| //.. /* Make a vector reg-reg move. */ |
| //.. |
| //.. static X86Instr* mk_vMOVsd_RR ( HReg src, HReg dst ) |
| //.. { |
| //.. vassert(hregClass(src) == HRcVec128); |
| //.. vassert(hregClass(dst) == HRcVec128); |
| //.. return X86Instr_SseReRg(Xsse_MOV, src, dst); |
| //.. } |
| //.. |
| //.. /* Advance/retreat %esp by n. */ |
| //.. |
| //.. static void add_to_esp ( ISelEnv* env, Int n ) |
| //.. { |
| //.. vassert(n > 0 && n < 256 && (n%4) == 0); |
| //.. addInstr(env, |
| //.. X86Instr_Alu32R(Xalu_ADD, X86RMI_Imm(n), hregX86_ESP())); |
| //.. } |
| //.. |
| //.. static void sub_from_esp ( ISelEnv* env, Int n ) |
| //.. { |
| //.. vassert(n > 0 && n < 256 && (n%4) == 0); |
| //.. addInstr(env, |
| //.. X86Instr_Alu32R(Xalu_SUB, X86RMI_Imm(n), hregX86_ESP())); |
| //.. } |
| //.. |
| //.. |
| //.. /* Given an amode, return one which references 4 bytes further |
| //.. along. */ |
| //.. |
| //.. static X86AMode* advance4 ( X86AMode* am ) |
| //.. { |
| //.. X86AMode* am4 = dopyX86AMode(am); |
| //.. switch (am4->tag) { |
| //.. case Xam_IRRS: |
| //.. am4->Xam.IRRS.imm += 4; break; |
| //.. case Xam_IR: |
| //.. am4->Xam.IR.imm += 4; break; |
| //.. default: |
| //.. vpanic("advance4(x86,host)"); |
| //.. } |
| //.. return am4; |
| //.. } |
| //.. |
| //.. |
| //.. /* Push an arg onto the host stack, in preparation for a call to a |
| //.. helper function of some kind. Returns the number of 32-bit words |
| //.. pushed. */ |
| //.. |
| //.. static Int pushArg ( ISelEnv* env, IRExpr* arg ) |
| //.. { |
| //.. IRType arg_ty = typeOfIRExpr(env->type_env, arg); |
| //.. if (arg_ty == Ity_I32) { |
| //.. addInstr(env, X86Instr_Push(iselIntExpr_RMI(env, arg))); |
| //.. return 1; |
| //.. } else |
| //.. if (arg_ty == Ity_I64) { |
| //.. HReg rHi, rLo; |
| //.. iselInt64Expr(&rHi, &rLo, env, arg); |
| //.. addInstr(env, X86Instr_Push(X86RMI_Reg(rHi))); |
| //.. addInstr(env, X86Instr_Push(X86RMI_Reg(rLo))); |
| //.. return 2; |
| //.. } |
| //.. ppIRExpr(arg); |
| //.. vpanic("pushArg(x86): can't handle arg of this type"); |
| //.. } |
| |
| |
| /* Used only in doHelperCall. See big comment in doHelperCall re |
| handling of register-parameter args. This function figures out |
| whether evaluation of an expression might require use of a fixed |
| register. If in doubt return True (safe but suboptimal). |
| */ |
| static |
| Bool mightRequireFixedRegs ( IRExpr* e ) |
| { |
| switch (e->tag) { |
| case Iex_Tmp: case Iex_Const: case Iex_Get: |
| return False; |
| default: |
| return True; |
| } |
| } |
| |
| |
| /* Do a complete function call. guard is a Ity_Bit expression |
| indicating whether or not the call happens. If guard==NULL, the |
| call is unconditional. */ |
| |
| static |
| void doHelperCall ( ISelEnv* env, |
| Bool passBBP, |
| IRExpr* guard, IRCallee* cee, IRExpr** args ) |
| { |
| AMD64CondCode cc; |
| HReg argregs[6]; |
| HReg tmpregs[6]; |
| Bool go_fast; |
| Int n_args, i, argreg; |
| |
| /* Marshal args for a call and do the call. |
| |
| If passBBP is True, %rbp (the baseblock pointer) is to be passed |
| as the first arg. |
| |
| This function only deals with a tiny set of possibilities, which |
| cover all helpers in practice. The restrictions are that only |
| arguments in registers are supported, hence only 6x64 integer |
| bits in total can be passed. In fact the only supported arg |
| type is I64. |
| |
| Generating code which is both efficient and correct when |
| parameters are to be passed in registers is difficult, for the |
| reasons elaborated in detail in comments attached to |
| doHelperCall() in priv/host-x86/isel.c. Here, we use a variant |
| of the method described in those comments. |
| |
| The problem is split into two cases: the fast scheme and the |
| slow scheme. In the fast scheme, arguments are computed |
| directly into the target (real) registers. This is only safe |
| when we can be sure that computation of each argument will not |
| trash any real registers set by computation of any other |
| argument. |
| |
| In the slow scheme, all args are first computed into vregs, and |
| once they are all done, they are moved to the relevant real |
| regs. This always gives correct code, but it also gives a bunch |
| of vreg-to-rreg moves which are usually redundant but are hard |
| for the register allocator to get rid of. |
| |
| To decide which scheme to use, all argument expressions are |
| first examined. If they are all so simple that it is clear they |
| will be evaluated without use of any fixed registers, use the |
| fast scheme, else use the slow scheme. Note also that only |
| unconditional calls may use the fast scheme, since having to |
| compute a condition expression could itself trash real |
| registers. |
| |
| Note this requires being able to examine an expression and |
| determine whether or not evaluation of it might use a fixed |
| register. That requires knowledge of how the rest of this insn |
| selector works. Currently just the following 3 are regarded as |
| safe -- hopefully they cover the majority of arguments in |
| practice: IRExpr_Tmp IRExpr_Const IRExpr_Get. |
| */ |
| |
| /* Note that the cee->regparms field is meaningless on AMD64 host |
| (since there is only one calling convention) and so we always |
| ignore it. */ |
| |
| n_args = 0; |
| for (i = 0; args[i]; i++) |
| n_args++; |
| |
| if (6 < n_args + (passBBP ? 1 : 0)) |
| vpanic("doHelperCall(AMD64): cannot currently handle > 6 args"); |
| |
| argregs[0] = hregAMD64_RDI(); |
| argregs[1] = hregAMD64_RSI(); |
| argregs[2] = hregAMD64_RDX(); |
| argregs[3] = hregAMD64_RCX(); |
| argregs[4] = hregAMD64_R8(); |
| argregs[5] = hregAMD64_R9(); |
| |
| tmpregs[0] = tmpregs[1] = tmpregs[2] = |
| tmpregs[3] = tmpregs[4] = tmpregs[5] = INVALID_HREG; |
| |
| /* First decide which scheme (slow or fast) is to be used. First |
| assume the fast scheme, and select slow if any contraindications |
| (wow) appear. */ |
| |
| go_fast = True; |
| |
| if (guard) { |
| if (guard->tag == Iex_Const |
| && guard->Iex.Const.con->tag == Ico_U1 |
| && guard->Iex.Const.con->Ico.U1 == True) { |
| /* unconditional */ |
| } else { |
| /* Not manifestly unconditional -- be conservative. */ |
| go_fast = False; |
| } |
| } |
| |
| if (go_fast) { |
| for (i = 0; i < n_args; i++) { |
| if (mightRequireFixedRegs(args[i])) { |
| go_fast = False; |
| break; |
| } |
| } |
| } |
| |
| /* At this point the scheme to use has been established. Generate |
| code to get the arg values into the argument rregs. */ |
| |
| if (go_fast) { |
| |
| /* FAST SCHEME */ |
| argreg = 0; |
| if (passBBP) { |
| addInstr(env, mk_iMOVsd_RR( hregAMD64_RBP(), argregs[argreg])); |
| argreg++; |
| } |
| |
| for (i = 0; i < n_args; i++) { |
| vassert(argreg < 6); |
| vassert(typeOfIRExpr(env->type_env, args[i]) == Ity_I64); |
| addInstr(env, AMD64Instr_Alu64R( |
| Aalu_MOV, |
| iselIntExpr_RMI(env, args[i]), |
| argregs[argreg] |
| ) |
| ); |
| argreg++; |
| } |
| |
| /* Fast scheme only applies for unconditional calls. Hence: */ |
| cc = Acc_ALWAYS; |
| |
| } else { |
| |
| /* SLOW SCHEME; move via temporaries */ |
| argreg = 0; |
| |
| if (passBBP) { |
| /* This is pretty stupid; better to move directly to rdi |
| after the rest of the args are done. */ |
| tmpregs[argreg] = newVRegI(env); |
| addInstr(env, mk_iMOVsd_RR( hregAMD64_RBP(), tmpregs[argreg])); |
| argreg++; |
| } |
| |
| for (i = 0; i < n_args; i++) { |
| vassert(argreg < 6); |
| vassert(typeOfIRExpr(env->type_env, args[i]) == Ity_I64); |
| tmpregs[argreg] = iselIntExpr_R(env, args[i]); |
| argreg++; |
| } |
| |
| /* Now we can compute the condition. We can't do it earlier |
| because the argument computations could trash the condition |
| codes. Be a bit clever to handle the common case where the |
| guard is 1:Bit. */ |
| cc = Acc_ALWAYS; |
| if (guard) { |
| if (guard->tag == Iex_Const |
| && guard->Iex.Const.con->tag == Ico_U1 |
| && guard->Iex.Const.con->Ico.U1 == True) { |
| /* unconditional -- do nothing */ |
| } else { |
| cc = iselCondCode( env, guard ); |
| } |
| } |
| |
| /* Move the args to their final destinations. */ |
| for (i = 0; i < argreg; i++) { |
| /* None of these insns, including any spill code that might |
| be generated, may alter the condition codes. */ |
| addInstr( env, mk_iMOVsd_RR( tmpregs[i], argregs[i] ) ); |
| } |
| |
| } |
| |
| /* Finally, the call itself. */ |
| addInstr(env, AMD64Instr_Call( |
| cc, |
| Ptr_to_ULong(cee->addr), |
| n_args + (passBBP ? 1 : 0) |
| ) |
| ); |
| } |
| |
| |
| //.. /* Given a guest-state array descriptor, an index expression and a |
| //.. bias, generate an X86AMode holding the relevant guest state |
| //.. offset. */ |
| //.. |
| //.. static |
| //.. X86AMode* genGuestArrayOffset ( ISelEnv* env, IRArray* descr, |
| //.. IRExpr* off, Int bias ) |
| //.. { |
| //.. HReg tmp, roff; |
| //.. Int elemSz = sizeofIRType(descr->elemTy); |
| //.. Int nElems = descr->nElems; |
| //.. |
| //.. /* throw out any cases not generated by an x86 front end. In |
| //.. theory there might be a day where we need to handle them -- if |
| //.. we ever run non-x86-guest on x86 host. */ |
| //.. |
| //.. if (nElems != 8 || (elemSz != 1 && elemSz != 8)) |
| //.. vpanic("genGuestArrayOffset(x86 host)"); |
| //.. |
| //.. /* Compute off into a reg, %off. Then return: |
| //.. |
| //.. movl %off, %tmp |
| //.. addl $bias, %tmp (if bias != 0) |
| //.. andl %tmp, 7 |
| //.. ... base(%ebp, %tmp, shift) ... |
| //.. */ |
| //.. tmp = newVRegI(env); |
| //.. roff = iselIntExpr_R(env, off); |
| //.. addInstr(env, mk_iMOVsd_RR(roff, tmp)); |
| //.. if (bias != 0) { |
| //.. addInstr(env, |
| //.. X86Instr_Alu32R(Xalu_ADD, X86RMI_Imm(bias), tmp)); |
| //.. } |
| //.. addInstr(env, |
| //.. X86Instr_Alu32R(Xalu_AND, X86RMI_Imm(7), tmp)); |
| //.. vassert(elemSz == 1 || elemSz == 8); |
| //.. return |
| //.. X86AMode_IRRS( descr->base, hregX86_EBP(), tmp, |
| //.. elemSz==8 ? 3 : 0); |
| //.. } |
| //.. |
| //.. |
| //.. /* Mess with the FPU's rounding mode: set to the default rounding mode |
| //.. (DEFAULT_FPUCW). */ |
| //.. static |
| //.. void set_FPU_rounding_default ( ISelEnv* env ) |
| //.. { |
| //.. /* pushl $DEFAULT_FPUCW |
| //.. fldcw 0(%esp) |
| //.. addl $4, %esp |
| //.. */ |
| //.. X86AMode* zero_esp = X86AMode_IR(0, hregX86_ESP()); |
| //.. addInstr(env, X86Instr_Push(X86RMI_Imm(DEFAULT_FPUCW))); |
| //.. addInstr(env, X86Instr_FpLdStCW(True/*load*/, zero_esp)); |
| //.. add_to_esp(env, 4); |
| //.. } |
| //.. |
| //.. |
| //.. /* Mess with the FPU's rounding mode: 'mode' is an I32-typed |
| //.. expression denoting a value in the range 0 .. 3, indicating a round |
| //.. mode encoded as per type IRRoundingMode. Set the x87 FPU to have |
| //.. the same rounding. |
| //.. */ |
| //.. static |
| //.. void set_FPU_rounding_mode ( ISelEnv* env, IRExpr* mode ) |
| //.. { |
| //.. HReg rrm = iselIntExpr_R(env, mode); |
| //.. HReg rrm2 = newVRegI(env); |
| //.. X86AMode* zero_esp = X86AMode_IR(0, hregX86_ESP()); |
| //.. |
| //.. /* movl %rrm, %rrm2 |
| //.. andl $3, %rrm2 -- shouldn't be needed; paranoia |
| //.. shll $10, %rrm2 |
| //.. orl $DEFAULT_FPUCW, %rrm2 |
| //.. pushl %rrm2 |
| //.. fldcw 0(%esp) |
| //.. addl $4, %esp |
| //.. */ |
| //.. addInstr(env, mk_iMOVsd_RR(rrm, rrm2)); |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_AND, X86RMI_Imm(3), rrm2)); |
| //.. addInstr(env, X86Instr_Sh32(Xsh_SHL, 10, X86RM_Reg(rrm2))); |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_OR, X86RMI_Imm(DEFAULT_FPUCW), rrm2)); |
| //.. addInstr(env, X86Instr_Push(X86RMI_Reg(rrm2))); |
| //.. addInstr(env, X86Instr_FpLdStCW(True/*load*/, zero_esp)); |
| //.. add_to_esp(env, 4); |
| //.. } |
| //.. |
| //.. |
| //.. /* Generate !src into a new vector register, and be sure that the code |
| //.. is SSE1 compatible. Amazing that Intel doesn't offer a less crappy |
| //.. way to do this. |
| //.. */ |
| //.. static HReg do_sse_Not128 ( ISelEnv* env, HReg src ) |
| //.. { |
| //.. HReg dst = newVRegV(env); |
| //.. /* Set dst to zero. Not strictly necessary, but the idea of doing |
| //.. a FP comparison on whatever junk happens to be floating around |
| //.. in it is just too scary. */ |
| //.. addInstr(env, X86Instr_SseReRg(Xsse_XOR, dst, dst)); |
| //.. /* And now make it all 1s ... */ |
| //.. addInstr(env, X86Instr_Sse32Fx4(Xsse_CMPEQF, dst, dst)); |
| //.. /* Finally, xor 'src' into it. */ |
| //.. addInstr(env, X86Instr_SseReRg(Xsse_XOR, src, dst)); |
| //.. return dst; |
| //.. } |
| //.. |
| //.. |
| //.. /* Round an x87 FPU value to 53-bit-mantissa precision, to be used |
| //.. after most non-simple FPU operations (simple = +, -, *, / and |
| //.. sqrt). |
| //.. |
| //.. This could be done a lot more efficiently if needed, by loading |
| //.. zero and adding it to the value to be rounded (fldz ; faddp?). |
| //.. */ |
| //.. static void roundToF64 ( ISelEnv* env, HReg reg ) |
| //.. { |
| //.. X86AMode* zero_esp = X86AMode_IR(0, hregX86_ESP()); |
| //.. sub_from_esp(env, 8); |
| //.. addInstr(env, X86Instr_FpLdSt(False/*store*/, 8, reg, zero_esp)); |
| //.. addInstr(env, X86Instr_FpLdSt(True/*load*/, 8, reg, zero_esp)); |
| //.. add_to_esp(env, 8); |
| //.. } |
| |
| |
| /*---------------------------------------------------------*/ |
| /*--- ISEL: Integer expressions (64/32/16/8 bit) ---*/ |
| /*---------------------------------------------------------*/ |
| |
| /* Select insns for an integer-typed expression, and add them to the |
| code list. Return a reg holding the result. This reg will be a |
| virtual register. THE RETURNED REG MUST NOT BE MODIFIED. If you |
| want to modify it, ask for a new vreg, copy it in there, and modify |
| the copy. The register allocator will do its best to map both |
| vregs to the same real register, so the copies will often disappear |
| later in the game. |
| |
| This should handle expressions of 64, 32, 16 and 8-bit type. All |
| results are returned in a 64-bit register. For 32-, 16- and 8-bit |
| expressions, the upper 32/16/24 bits are arbitrary, so you should |
| mask or sign extend partial values if necessary. |
| */ |
| |
| static HReg iselIntExpr_R ( ISelEnv* env, IRExpr* e ) |
| { |
| HReg r = iselIntExpr_R_wrk(env, e); |
| /* sanity checks ... */ |
| # if 0 |
| vex_printf("\niselIntExpr_R: "); ppIRExpr(e); vex_printf("\n"); |
| # endif |
| vassert(hregClass(r) == HRcInt64); |
| vassert(hregIsVirtual(r)); |
| return r; |
| } |
| |
| /* DO NOT CALL THIS DIRECTLY ! */ |
| static HReg iselIntExpr_R_wrk ( ISelEnv* env, IRExpr* e ) |
| { |
| MatchInfo mi; |
| DECLARE_PATTERN(p_8Uto64); |
| DECLARE_PATTERN(p_16Uto64); |
| DECLARE_PATTERN(p_1Uto8_32to1_64to32); |
| //.. DECLARE_PATTERN(p_32to1_then_1Uto8); |
| |
| IRType ty = typeOfIRExpr(env->type_env,e); |
| vassert(ty == Ity_I32 || Ity_I16 || Ity_I8); |
| |
| switch (e->tag) { |
| |
| /* --------- TEMP --------- */ |
| case Iex_Tmp: { |
| return lookupIRTemp(env, e->Iex.Tmp.tmp); |
| } |
| |
| /* --------- LOAD --------- */ |
| case Iex_LDle: { |
| HReg dst = newVRegI(env); |
| AMD64AMode* amode = iselIntExpr_AMode ( env, e->Iex.LDle.addr ); |
| if (ty == Ity_I64) { |
| addInstr(env, AMD64Instr_Alu64R(Aalu_MOV, |
| AMD64RMI_Mem(amode), dst) ); |
| return dst; |
| } |
| if (ty == Ity_I32) { |
| addInstr(env, AMD64Instr_LoadEX(4,False,amode,dst)); |
| return dst; |
| } |
| if (ty == Ity_I16) { |
| addInstr(env, AMD64Instr_LoadEX(2,False,amode,dst)); |
| return dst; |
| } |
| if (ty == Ity_I8) { |
| addInstr(env, AMD64Instr_LoadEX(1,False,amode,dst)); |
| return dst; |
| } |
| break; |
| } |
| |
| /* --------- BINARY OP --------- */ |
| case Iex_Binop: { |
| AMD64AluOp aluOp; |
| AMD64ShiftOp shOp; |
| //.. |
| //.. /* Pattern: Sub32(0,x) */ |
| //.. if (e->Iex.Binop.op == Iop_Sub32 && isZero32(e->Iex.Binop.arg1)) { |
| //.. HReg dst = newVRegI(env); |
| //.. HReg reg = iselIntExpr_R(env, e->Iex.Binop.arg2); |
| //.. addInstr(env, mk_iMOVsd_RR(reg,dst)); |
| //.. addInstr(env, X86Instr_Unary32(Xun_NEG,X86RM_Reg(dst))); |
| //.. return dst; |
| //.. } |
| //.. |
| /* Is it an addition or logical style op? */ |
| switch (e->Iex.Binop.op) { |
| case Iop_Add8: case Iop_Add16: case Iop_Add32: case Iop_Add64: |
| aluOp = Aalu_ADD; break; |
| case Iop_Sub8: case Iop_Sub16: case Iop_Sub32: case Iop_Sub64: |
| aluOp = Aalu_SUB; break; |
| case Iop_And8: case Iop_And16: case Iop_And32: case Iop_And64: |
| aluOp = Aalu_AND; break; |
| case Iop_Or8: case Iop_Or16: case Iop_Or32: case Iop_Or64: |
| aluOp = Aalu_OR; break; |
| case Iop_Xor8: case Iop_Xor16: case Iop_Xor32: case Iop_Xor64: |
| aluOp = Aalu_XOR; break; |
| //.. case Iop_Mul16: case Iop_Mul32: |
| case Iop_Mul32: case Iop_Mul64: |
| aluOp = Aalu_MUL; break; |
| default: |
| aluOp = Aalu_INVALID; break; |
| } |
| /* For commutative ops we assume any literal |
| values are on the second operand. */ |
| if (aluOp != Aalu_INVALID) { |
| HReg dst = newVRegI(env); |
| HReg reg = iselIntExpr_R(env, e->Iex.Binop.arg1); |
| AMD64RMI* rmi = iselIntExpr_RMI(env, e->Iex.Binop.arg2); |
| addInstr(env, mk_iMOVsd_RR(reg,dst)); |
| addInstr(env, AMD64Instr_Alu64R(aluOp, rmi, dst)); |
| return dst; |
| } |
| |
| /* Perhaps a shift op? */ |
| switch (e->Iex.Binop.op) { |
| case Iop_Shl64: case Iop_Shl32: case Iop_Shl16: case Iop_Shl8: |
| shOp = Ash_SHL; break; |
| case Iop_Shr64: case Iop_Shr32: case Iop_Shr16: case Iop_Shr8: |
| shOp = Ash_SHR; break; |
| case Iop_Sar64: case Iop_Sar32: case Iop_Sar16: case Iop_Sar8: |
| shOp = Ash_SAR; break; |
| default: |
| shOp = Ash_INVALID; break; |
| } |
| if (shOp != Ash_INVALID) { |
| HReg dst = newVRegI(env); |
| |
| /* regL = the value to be shifted */ |
| HReg regL = iselIntExpr_R(env, e->Iex.Binop.arg1); |
| addInstr(env, mk_iMOVsd_RR(regL,dst)); |
| |
| /* Do any necessary widening for 32/16/8 bit operands */ |
| switch (e->Iex.Binop.op) { |
| case Iop_Shr64: case Iop_Shl64: case Iop_Sar64: |
| break; |
| //.. case Iop_Shr8: |
| //.. addInstr(env, X86Instr_Alu32R( |
| //.. Xalu_AND, X86RMI_Imm(0xFF), dst)); |
| //.. break; |
| //.. case Iop_Shr16: |
| //.. addInstr(env, X86Instr_Alu32R( |
| //.. Xalu_AND, X86RMI_Imm(0xFFFF), dst)); |
| //.. break; |
| //.. case Iop_Sar8: |
| //.. addInstr(env, X86Instr_Sh32(Xsh_SHL, 24, X86RM_Reg(dst))); |
| //.. addInstr(env, X86Instr_Sh32(Xsh_SAR, 24, X86RM_Reg(dst))); |
| //.. break; |
| //.. case Iop_Sar16: |
| //.. addInstr(env, X86Instr_Sh32(Xsh_SHL, 16, X86RM_Reg(dst))); |
| //.. addInstr(env, X86Instr_Sh32(Xsh_SAR, 16, X86RM_Reg(dst))); |
| //.. break; |
| case Iop_Sar32: |
| addInstr(env, AMD64Instr_Sh64(Ash_SHL, 32, AMD64RM_Reg(dst))); |
| addInstr(env, AMD64Instr_Sh64(Ash_SAR, 32, AMD64RM_Reg(dst))); |
| break; |
| default: |
| vassert(0); |
| } |
| |
| /* Now consider the shift amount. If it's a literal, we |
| can do a much better job than the general case. */ |
| if (e->Iex.Binop.arg2->tag == Iex_Const) { |
| /* assert that the IR is well-typed */ |
| Int nshift; |
| vassert(e->Iex.Binop.arg2->Iex.Const.con->tag == Ico_U8); |
| nshift = e->Iex.Binop.arg2->Iex.Const.con->Ico.U8; |
| vassert(nshift >= 0); |
| if (nshift > 0) |
| /* Can't allow nshift==0 since that means %cl */ |
| addInstr(env, AMD64Instr_Sh64( |
| shOp, |
| nshift, |
| AMD64RM_Reg(dst))); |
| } else { |
| /* General case; we have to force the amount into %cl. */ |
| HReg regR = iselIntExpr_R(env, e->Iex.Binop.arg2); |
| addInstr(env, mk_iMOVsd_RR(regR,hregAMD64_RCX())); |
| addInstr(env, AMD64Instr_Sh64(shOp, 0/* %cl */, AMD64RM_Reg(dst))); |
| } |
| return dst; |
| } |
| |
| /* Handle misc other ops. */ |
| |
| if (e->Iex.Binop.op == Iop_DivModS64to32 |
| || e->Iex.Binop.op == Iop_DivModU64to32) { |
| /* 64 x 32 -> (32(rem),32(div)) division */ |
| /* Get the 64-bit operand into edx:eax, and the other into |
| any old R/M. */ |
| HReg rax = hregAMD64_RAX(); |
| HReg rdx = hregAMD64_RDX(); |
| HReg dst = newVRegI(env); |
| Bool syned = e->Iex.Binop.op == Iop_DivModS64to32; |
| AMD64RM* rmRight = iselIntExpr_RM(env, e->Iex.Binop.arg2); |
| AMD64RMI* mask = AMD64RMI_Imm(0xFFFFFFFF); |
| /* Compute the left operand into a reg, and then |
| put the top half in edx and the bottom in eax. */ |
| HReg left64 = iselIntExpr_R(env, e->Iex.Binop.arg1); |
| |
| addInstr(env, mk_iMOVsd_RR(left64, rdx)); |
| addInstr(env, mk_iMOVsd_RR(left64, rax)); |
| addInstr(env, AMD64Instr_Sh64(Ash_SAR, 32, AMD64RM_Reg(rdx))); |
| addInstr(env, AMD64Instr_Div(syned, 4, rmRight)); |
| addInstr(env, AMD64Instr_Alu64R(Aalu_AND, mask, rdx)); |
| addInstr(env, AMD64Instr_Alu64R(Aalu_AND, mask, rax)); |
| addInstr(env, AMD64Instr_Sh64(Ash_SHL, 32, AMD64RM_Reg(rdx))); |
| addInstr(env, mk_iMOVsd_RR(rax, dst)); |
| addInstr(env, AMD64Instr_Alu64R(Aalu_OR, AMD64RMI_Reg(rdx), dst)); |
| return dst; |
| } |
| |
| if (e->Iex.Binop.op == Iop_32HLto64) { |
| HReg hi32 = newVRegI(env); |
| HReg lo32 = newVRegI(env); |
| HReg hi32s = iselIntExpr_R(env, e->Iex.Binop.arg1); |
| HReg lo32s = iselIntExpr_R(env, e->Iex.Binop.arg2); |
| addInstr(env, mk_iMOVsd_RR(hi32s, hi32)); |
| addInstr(env, mk_iMOVsd_RR(lo32s, lo32)); |
| addInstr(env, AMD64Instr_Sh64(Ash_SHL, 32, AMD64RM_Reg(hi32))); |
| addInstr(env, AMD64Instr_Alu64R( |
| Aalu_AND, AMD64RMI_Imm(0xFFFFFFFF), lo32)); |
| addInstr(env, AMD64Instr_Alu64R( |
| Aalu_OR, AMD64RMI_Reg(lo32), hi32)); |
| return hi32; |
| } |
| |
| |
| |
| //.. if (e->Iex.Binop.op == Iop_8HLto16) { |
| //.. HReg hi8 = newVRegI(env); |
| //.. HReg lo8 = newVRegI(env); |
| //.. HReg hi8s = iselIntExpr_R(env, e->Iex.Binop.arg1); |
| //.. HReg lo8s = iselIntExpr_R(env, e->Iex.Binop.arg2); |
| //.. addInstr(env, mk_iMOVsd_RR(hi8s, hi8)); |
| //.. addInstr(env, mk_iMOVsd_RR(lo8s, lo8)); |
| //.. addInstr(env, X86Instr_Sh32(Xsh_SHL, 8, X86RM_Reg(hi8))); |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_AND, X86RMI_Imm(0xFF), lo8)); |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_OR, X86RMI_Reg(lo8), hi8)); |
| //.. return hi8; |
| //.. } |
| //.. |
| //.. if (e->Iex.Binop.op == Iop_16HLto32) { |
| //.. HReg hi16 = newVRegI(env); |
| //.. HReg lo16 = newVRegI(env); |
| //.. HReg hi16s = iselIntExpr_R(env, e->Iex.Binop.arg1); |
| //.. HReg lo16s = iselIntExpr_R(env, e->Iex.Binop.arg2); |
| //.. addInstr(env, mk_iMOVsd_RR(hi16s, hi16)); |
| //.. addInstr(env, mk_iMOVsd_RR(lo16s, lo16)); |
| //.. addInstr(env, X86Instr_Sh32(Xsh_SHL, 16, X86RM_Reg(hi16))); |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_AND, X86RMI_Imm(0xFFFF), lo16)); |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_OR, X86RMI_Reg(lo16), hi16)); |
| //.. return hi16; |
| //.. } |
| //.. |
| //.. if (e->Iex.Binop.op == Iop_MullS16 || e->Iex.Binop.op == Iop_MullS8 |
| //.. || e->Iex.Binop.op == Iop_MullU16 || e->Iex.Binop.op == Iop_MullU8) { |
| //.. HReg a16 = newVRegI(env); |
| //.. HReg b16 = newVRegI(env); |
| //.. HReg a16s = iselIntExpr_R(env, e->Iex.Binop.arg1); |
| //.. HReg b16s = iselIntExpr_R(env, e->Iex.Binop.arg2); |
| //.. Int shift = (e->Iex.Binop.op == Iop_MullS8 |
| //.. || e->Iex.Binop.op == Iop_MullU8) |
| //.. ? 24 : 16; |
| //.. X86ShiftOp shr_op = (e->Iex.Binop.op == Iop_MullS8 |
| //.. || e->Iex.Binop.op == Iop_MullS16) |
| //.. ? Xsh_SAR : Xsh_SHR; |
| //.. |
| //.. addInstr(env, mk_iMOVsd_RR(a16s, a16)); |
| //.. addInstr(env, mk_iMOVsd_RR(b16s, b16)); |
| //.. addInstr(env, X86Instr_Sh32(Xsh_SHL, shift, X86RM_Reg(a16))); |
| //.. addInstr(env, X86Instr_Sh32(Xsh_SHL, shift, X86RM_Reg(b16))); |
| //.. addInstr(env, X86Instr_Sh32(shr_op, shift, X86RM_Reg(a16))); |
| //.. addInstr(env, X86Instr_Sh32(shr_op, shift, X86RM_Reg(b16))); |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_MUL, X86RMI_Reg(a16), b16)); |
| //.. return b16; |
| //.. } |
| //.. |
| //.. if (e->Iex.Binop.op == Iop_CmpF64) { |
| //.. HReg fL = iselDblExpr(env, e->Iex.Binop.arg1); |
| //.. HReg fR = iselDblExpr(env, e->Iex.Binop.arg2); |
| //.. HReg dst = newVRegI(env); |
| //.. addInstr(env, X86Instr_FpCmp(fL,fR,dst)); |
| //.. /* shift this right 8 bits so as to conform to CmpF64 |
| //.. definition. */ |
| //.. addInstr(env, X86Instr_Sh32(Xsh_SHR, 8, X86RM_Reg(dst))); |
| //.. return dst; |
| //.. } |
| //.. |
| //.. if (e->Iex.Binop.op == Iop_F64toI32 || e->Iex.Binop.op == Iop_F64toI16) { |
| //.. Int sz = e->Iex.Binop.op == Iop_F64toI16 ? 2 : 4; |
| //.. HReg rf = iselDblExpr(env, e->Iex.Binop.arg2); |
| //.. HReg dst = newVRegI(env); |
| //.. |
| //.. /* Used several times ... */ |
| //.. X86AMode* zero_esp = X86AMode_IR(0, hregX86_ESP()); |
| //.. |
| //.. /* rf now holds the value to be converted, and rrm holds the |
| //.. rounding mode value, encoded as per the IRRoundingMode |
| //.. enum. The first thing to do is set the FPU's rounding |
| //.. mode accordingly. */ |
| //.. |
| //.. /* Create a space for the format conversion. */ |
| //.. /* subl $4, %esp */ |
| //.. sub_from_esp(env, 4); |
| //.. |
| //.. /* Set host rounding mode */ |
| //.. set_FPU_rounding_mode( env, e->Iex.Binop.arg1 ); |
| //.. |
| //.. /* gistw/l %rf, 0(%esp) */ |
| //.. addInstr(env, X86Instr_FpLdStI(False/*store*/, sz, rf, zero_esp)); |
| //.. |
| //.. if (sz == 2) { |
| //.. /* movzwl 0(%esp), %dst */ |
| //.. addInstr(env, X86Instr_LoadEX(2,False,zero_esp,dst)); |
| //.. } else { |
| //.. /* movl 0(%esp), %dst */ |
| //.. vassert(sz == 4); |
| //.. addInstr(env, X86Instr_Alu32R( |
| //.. Xalu_MOV, X86RMI_Mem(zero_esp), dst)); |
| //.. } |
| //.. |
| //.. /* Restore default FPU rounding. */ |
| //.. set_FPU_rounding_default( env ); |
| //.. |
| //.. /* addl $4, %esp */ |
| //.. add_to_esp(env, 4); |
| //.. return dst; |
| //.. } |
| //.. |
| //.. /* C3210 flags following FPU partial remainder (fprem), both |
| //.. IEEE compliant (PREM1) and non-IEEE compliant (PREM). */ |
| //.. if (e->Iex.Binop.op == Iop_PRemC3210F64 |
| //.. || e->Iex.Binop.op == Iop_PRem1C3210F64) { |
| //.. HReg junk = newVRegF(env); |
| //.. HReg dst = newVRegI(env); |
| //.. HReg srcL = iselDblExpr(env, e->Iex.Binop.arg1); |
| //.. HReg srcR = iselDblExpr(env, e->Iex.Binop.arg2); |
| //.. addInstr(env, X86Instr_FpBinary( |
| //.. e->Iex.Binop.op==Iop_PRemC3210F64 |
| //.. ? Xfp_PREM : Xfp_PREM1, |
| //.. srcL,srcR,junk |
| //.. )); |
| //.. /* The previous pseudo-insn will have left the FPU's C3210 |
| //.. flags set correctly. So bag them. */ |
| //.. addInstr(env, X86Instr_FpStSW_AX()); |
| //.. addInstr(env, mk_iMOVsd_RR(hregX86_EAX(), dst)); |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_AND, X86RMI_Imm(0x4700), dst)); |
| //.. return dst; |
| //.. } |
| |
| break; |
| } |
| |
| /* --------- UNARY OP --------- */ |
| case Iex_Unop: { |
| /* 32Uto64(16Uto32(expr16)) */ |
| DEFINE_PATTERN(p_16Uto64, |
| unop(Iop_32Uto64, unop(Iop_16Uto32, bind(0)) ) ); |
| if (matchIRExpr(&mi,p_16Uto64,e)) { |
| IRExpr* expr16 = mi.bindee[0]; |
| HReg dst = newVRegI(env); |
| HReg src = iselIntExpr_R(env, expr16); |
| addInstr(env, mk_iMOVsd_RR(src,dst) ); |
| addInstr(env, AMD64Instr_Sh64(Ash_SHL, 48, AMD64RM_Reg(dst))); |
| addInstr(env, AMD64Instr_Sh64(Ash_SHR, 48, AMD64RM_Reg(dst))); |
| return dst; |
| } |
| |
| /* 32Uto64(8Uto32(expr16)) */ |
| DEFINE_PATTERN(p_8Uto64, |
| unop(Iop_32Uto64, unop(Iop_8Uto32, bind(0)) ) ); |
| if (matchIRExpr(&mi,p_8Uto64,e)) { |
| IRExpr* expr8 = mi.bindee[0]; |
| HReg dst = newVRegI(env); |
| HReg src = iselIntExpr_R(env, expr8); |
| addInstr(env, mk_iMOVsd_RR(src,dst) ); |
| addInstr(env, AMD64Instr_Sh64(Ash_SHL, 56, AMD64RM_Reg(dst))); |
| addInstr(env, AMD64Instr_Sh64(Ash_SHR, 56, AMD64RM_Reg(dst))); |
| return dst; |
| } |
| |
| /* 1Uto8(32to1(64to32(expr64))) */ |
| DEFINE_PATTERN(p_1Uto8_32to1_64to32, |
| unop(Iop_1Uto8, |
| unop(Iop_32to1, unop(Iop_64to32, bind(0))))); |
| if (matchIRExpr(&mi,p_1Uto8_32to1_64to32,e)) { |
| IRExpr* expr64 = mi.bindee[0]; |
| HReg dst = newVRegI(env); |
| HReg src = iselIntExpr_R(env, expr64); |
| addInstr(env, mk_iMOVsd_RR(src,dst) ); |
| addInstr(env, AMD64Instr_Alu64R(Aalu_AND, |
| AMD64RMI_Imm(1), dst)); |
| return dst; |
| } |
| |
| //.. /* 16Uto32(LDle(expr32)) */ |
| //.. { |
| //.. DECLARE_PATTERN(p_LDle16_then_16Uto32); |
| //.. DEFINE_PATTERN(p_LDle16_then_16Uto32, |
| //.. unop(Iop_16Uto32,IRExpr_LDle(Ity_I16,bind(0))) ); |
| //.. if (matchIRExpr(&mi,p_LDle16_then_16Uto32,e)) { |
| //.. HReg dst = newVRegI(env); |
| //.. X86AMode* amode = iselIntExpr_AMode ( env, mi.bindee[0] ); |
| //.. addInstr(env, X86Instr_LoadEX(2,False,amode,dst)); |
| //.. return dst; |
| //.. } |
| //.. } |
| |
| switch (e->Iex.Unop.op) { |
| case Iop_32Uto64: { |
| HReg dst = newVRegI(env); |
| HReg src = iselIntExpr_R(env, e->Iex.Unop.arg); |
| addInstr(env, AMD64Instr_MovZLQ(src,dst) ); |
| return dst; |
| } |
| case Iop_32Sto64: { |
| HReg dst = newVRegI(env); |
| HReg src = iselIntExpr_R(env, e->Iex.Unop.arg); |
| UInt amt = 32; |
| addInstr(env, mk_iMOVsd_RR(src,dst) ); |
| addInstr(env, AMD64Instr_Sh64(Ash_SHL, amt, AMD64RM_Reg(dst))); |
| addInstr(env, AMD64Instr_Sh64(Ash_SAR, amt, AMD64RM_Reg(dst))); |
| return dst; |
| } |
| case Iop_128HIto64: { |
| HReg rHi, rLo; |
| iselInt128Expr(&rHi,&rLo, env, e->Iex.Unop.arg); |
| return rHi; /* and abandon rLo */ |
| } |
| case Iop_128to64: { |
| HReg rHi, rLo; |
| iselInt128Expr(&rHi,&rLo, env, e->Iex.Unop.arg); |
| return rLo; /* and abandon rHi */ |
| } |
| case Iop_8Uto16: { |
| //.. case Iop_8Uto32: |
| //.. case Iop_16Uto32: { |
| HReg dst = newVRegI(env); |
| HReg src = iselIntExpr_R(env, e->Iex.Unop.arg); |
| UInt mask = e->Iex.Unop.op==Iop_16Uto32 ? 0xFFFF : 0xFF; |
| addInstr(env, mk_iMOVsd_RR(src,dst) ); |
| addInstr(env, AMD64Instr_Alu64R(Aalu_AND, |
| AMD64RMI_Imm(mask), dst)); |
| return dst; |
| } |
| //.. case Iop_8Sto16: |
| case Iop_8Sto32: |
| case Iop_16Sto32: { |
| HReg dst = newVRegI(env); |
| HReg src = iselIntExpr_R(env, e->Iex.Unop.arg); |
| UInt amt = e->Iex.Unop.op==Iop_16Sto32 ? 48 : 56; |
| addInstr(env, mk_iMOVsd_RR(src,dst) ); |
| addInstr(env, AMD64Instr_Sh64(Ash_SHL, amt, AMD64RM_Reg(dst))); |
| addInstr(env, AMD64Instr_Sh64(Ash_SAR, amt, AMD64RM_Reg(dst))); |
| return dst; |
| } |
| //.. case Iop_Not8: |
| //.. case Iop_Not16: |
| case Iop_Not32: |
| case Iop_Not64: { |
| HReg dst = newVRegI(env); |
| HReg src = iselIntExpr_R(env, e->Iex.Unop.arg); |
| addInstr(env, mk_iMOVsd_RR(src,dst) ); |
| addInstr(env, AMD64Instr_Unary64(Aun_NOT,AMD64RM_Reg(dst))); |
| return dst; |
| } |
| //.. case Iop_64HIto32: { |
| //.. HReg rHi, rLo; |
| //.. iselInt64Expr(&rHi,&rLo, env, e->Iex.Unop.arg); |
| //.. return rHi; /* and abandon rLo .. poor wee thing :-) */ |
| //.. } |
| //.. case Iop_64to32: { |
| //.. HReg rHi, rLo; |
| //.. iselInt64Expr(&rHi,&rLo, env, e->Iex.Unop.arg); |
| //.. return rLo; /* similar stupid comment to the above ... */ |
| //.. } |
| //.. case Iop_16HIto8: |
| //.. case Iop_32HIto16: |
| case Iop_64HIto32: { |
| HReg dst = newVRegI(env); |
| HReg src = iselIntExpr_R(env, e->Iex.Unop.arg); |
| Int shift = 0; |
| switch (e->Iex.Unop.op) { |
| case Iop_64HIto32: shift = 32; break; |
| default: vassert(0); |
| } |
| addInstr(env, mk_iMOVsd_RR(src,dst) ); |
| addInstr(env, AMD64Instr_Sh64( |
| Ash_SHR, shift, AMD64RM_Reg(dst))); |
| return dst; |
| } |
| //.. case Iop_1Uto32: |
| //.. case Iop_1Uto8: { |
| //.. HReg dst = newVRegI(env); |
| //.. X86CondCode cond = iselCondCode(env, e->Iex.Unop.arg); |
| //.. addInstr(env, X86Instr_Set32(cond,dst)); |
| //.. return dst; |
| //.. } |
| //.. case Iop_1Sto8: |
| //.. case Iop_1Sto16: |
| //.. case Iop_1Sto32: { |
| //.. /* could do better than this, but for now ... */ |
| //.. HReg dst = newVRegI(env); |
| //.. X86CondCode cond = iselCondCode(env, e->Iex.Unop.arg); |
| //.. addInstr(env, X86Instr_Set32(cond,dst)); |
| //.. addInstr(env, X86Instr_Sh32(Xsh_SHL, 31, X86RM_Reg(dst))); |
| //.. addInstr(env, X86Instr_Sh32(Xsh_SAR, 31, X86RM_Reg(dst))); |
| //.. return dst; |
| //.. } |
| //.. case Iop_Ctz32: { |
| //.. /* Count trailing zeroes, implemented by x86 'bsfl' */ |
| //.. HReg dst = newVRegI(env); |
| //.. HReg src = iselIntExpr_R(env, e->Iex.Unop.arg); |
| //.. addInstr(env, X86Instr_Bsfr32(True,src,dst)); |
| //.. return dst; |
| //.. } |
| //.. case Iop_Clz32: { |
| //.. /* Count leading zeroes. Do 'bsrl' to establish the index |
| //.. of the highest set bit, and subtract that value from |
| //.. 31. */ |
| //.. HReg tmp = newVRegI(env); |
| //.. HReg dst = newVRegI(env); |
| //.. HReg src = iselIntExpr_R(env, e->Iex.Unop.arg); |
| //.. addInstr(env, X86Instr_Bsfr32(False,src,tmp)); |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_MOV, |
| //.. X86RMI_Imm(31), dst)); |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_SUB, |
| //.. X86RMI_Reg(tmp), dst)); |
| //.. return dst; |
| //.. } |
| //.. |
| //.. case Iop_128to32: { |
| //.. HReg dst = newVRegI(env); |
| //.. HReg vec = iselVecExpr(env, e->Iex.Unop.arg); |
| //.. X86AMode* esp0 = X86AMode_IR(0, hregX86_ESP()); |
| //.. sub_from_esp(env, 16); |
| //.. addInstr(env, X86Instr_SseLdSt(False/*store*/, vec, esp0)); |
| //.. addInstr(env, X86Instr_Alu32R( Xalu_MOV, X86RMI_Mem(esp0), dst )); |
| //.. add_to_esp(env, 16); |
| //.. return dst; |
| //.. } |
| //.. |
| //.. case Iop_16to8: |
| //.. case Iop_32to8: |
| case Iop_32to16: |
| case Iop_64to32: |
| /* These are no-ops. */ |
| return iselIntExpr_R(env, e->Iex.Unop.arg); |
| |
| default: |
| break; |
| } |
| break; |
| } |
| |
| /* --------- GET --------- */ |
| case Iex_Get: { |
| if (ty == Ity_I64) { |
| HReg dst = newVRegI(env); |
| addInstr(env, AMD64Instr_Alu64R( |
| Aalu_MOV, |
| AMD64RMI_Mem( |
| AMD64AMode_IR(e->Iex.Get.offset, |
| hregAMD64_RBP())), |
| dst)); |
| return dst; |
| } |
| if (ty == Ity_I8 || ty == Ity_I16 || ty == Ity_I32) { |
| HReg dst = newVRegI(env); |
| addInstr(env, AMD64Instr_LoadEX( |
| ty==Ity_I8 ? 1 : (ty==Ity_I16 ? 2 : 4), |
| False, |
| AMD64AMode_IR(e->Iex.Get.offset,hregAMD64_RBP()), |
| dst)); |
| return dst; |
| } |
| break; |
| } |
| |
| //.. case Iex_GetI: { |
| //.. X86AMode* am |
| //.. = genGuestArrayOffset( |
| //.. env, e->Iex.GetI.descr, |
| //.. e->Iex.GetI.ix, e->Iex.GetI.bias ); |
| //.. HReg dst = newVRegI(env); |
| //.. if (ty == Ity_I8) { |
| //.. addInstr(env, X86Instr_LoadEX( 1, False, am, dst )); |
| //.. return dst; |
| //.. } |
| //.. break; |
| //.. } |
| |
| /* --------- CCALL --------- */ |
| case Iex_CCall: { |
| HReg dst = newVRegI(env); |
| vassert(ty == e->Iex.CCall.retty); |
| |
| /* be very restrictive for now. Only 64-bit ints allowed |
| for args, and 64 bits for return type. */ |
| if (e->Iex.CCall.retty != Ity_I64) |
| goto irreducible; |
| |
| /* Marshal args, do the call. */ |
| doHelperCall( env, False, NULL, e->Iex.CCall.cee, e->Iex.CCall.args ); |
| |
| addInstr(env, mk_iMOVsd_RR(hregAMD64_RAX(), dst)); |
| return dst; |
| } |
| |
| /* --------- LITERAL --------- */ |
| /* 64/32/16/8-bit literals */ |
| case Iex_Const: |
| if (ty == Ity_I64) { |
| HReg r = newVRegI(env); |
| addInstr(env, AMD64Instr_Imm64(e->Iex.Const.con->Ico.U64, r)); |
| return r; |
| } else { |
| AMD64RMI* rmi = iselIntExpr_RMI ( env, e ); |
| HReg r = newVRegI(env); |
| addInstr(env, AMD64Instr_Alu64R(Aalu_MOV, rmi, r)); |
| return r; |
| } |
| |
| /* --------- MULTIPLEX --------- */ |
| case Iex_Mux0X: { |
| if ((ty == Ity_I64 || ty == Ity_I32 || ty == Ity_I16 || ty == Ity_I8) |
| && typeOfIRExpr(env->type_env,e->Iex.Mux0X.cond) == Ity_I8) { |
| HReg r8; |
| HReg rX = iselIntExpr_R(env, e->Iex.Mux0X.exprX); |
| AMD64RM* r0 = iselIntExpr_RM(env, e->Iex.Mux0X.expr0); |
| HReg dst = newVRegI(env); |
| addInstr(env, mk_iMOVsd_RR(rX,dst)); |
| r8 = iselIntExpr_R(env, e->Iex.Mux0X.cond); |
| addInstr(env, AMD64Instr_Test64(AMD64RI_Imm(0xFF), AMD64RM_Reg(r8))); |
| addInstr(env, AMD64Instr_CMov64(Acc_Z,r0,dst)); |
| return dst; |
| } |
| break; |
| } |
| |
| default: |
| break; |
| } /* switch (e->tag) */ |
| |
| /* We get here if no pattern matched. */ |
| irreducible: |
| ppIRExpr(e); |
| vpanic("iselIntExpr_R(amd64): cannot reduce tree"); |
| } |
| |
| |
| /*---------------------------------------------------------*/ |
| /*--- ISEL: Integer expression auxiliaries ---*/ |
| /*---------------------------------------------------------*/ |
| |
| /* --------------------- AMODEs --------------------- */ |
| |
| /* Return an AMode which computes the value of the specified |
| expression, possibly also adding insns to the code list as a |
| result. The expression may only be a 32-bit one. |
| */ |
| |
| static AMD64AMode* iselIntExpr_AMode ( ISelEnv* env, IRExpr* e ) |
| { |
| AMD64AMode* am = iselIntExpr_AMode_wrk(env, e); |
| vassert(sane_AMode(am)); |
| return am; |
| } |
| |
| /* DO NOT CALL THIS DIRECTLY ! */ |
| static AMD64AMode* iselIntExpr_AMode_wrk ( ISelEnv* env, IRExpr* e ) |
| { |
| MatchInfo mi; |
| DECLARE_PATTERN(p_complex); |
| IRType ty = typeOfIRExpr(env->type_env,e); |
| vassert(ty == Ity_I64); |
| |
| /* Add64( Add64(expr1, Shl64(expr2, imm8)), simm32 ) */ |
| /* bind0 bind1 bind2 bind3 */ |
| DEFINE_PATTERN(p_complex, |
| binop( Iop_Add64, |
| binop( Iop_Add64, |
| bind(0), |
| binop(Iop_Shl64, bind(1), bind(2)) |
| ), |
| bind(3) |
| ) |
| ); |
| if (matchIRExpr(&mi, p_complex, e)) { |
| IRExpr* expr1 = mi.bindee[0]; |
| IRExpr* expr2 = mi.bindee[1]; |
| IRExpr* imm8 = mi.bindee[2]; |
| IRExpr* simm32 = mi.bindee[3]; |
| if (imm8->tag == Iex_Const |
| && imm8->Iex.Const.con->tag == Ico_U8 |
| && imm8->Iex.Const.con->Ico.U8 < 4 |
| /* imm8 is OK, now check simm32 */ |
| && simm32->tag == Iex_Const |
| && simm32->Iex.Const.con->tag == Ico_U64 |
| && fitsIn32Bits(simm32->Iex.Const.con->Ico.U64)) { |
| UInt shift = imm8->Iex.Const.con->Ico.U8; |
| UInt offset = (UInt)(0xFFFFFFFF & simm32->Iex.Const.con->Ico.U64); |
| HReg r1 = iselIntExpr_R(env, expr1); |
| HReg r2 = iselIntExpr_R(env, expr2); |
| vassert(shift == 0 || shift == 1 || shift == 2 || shift == 3); |
| return AMD64AMode_IRRS(offset, r1, r2, shift); |
| } |
| } |
| |
| /* Add64(expr1, Shl64(expr2, imm)) */ |
| if (e->tag == Iex_Binop |
| && e->Iex.Binop.op == Iop_Add64 |
| && e->Iex.Binop.arg2->tag == Iex_Binop |
| && e->Iex.Binop.arg2->Iex.Binop.op == Iop_Shl64 |
| && e->Iex.Binop.arg2->Iex.Binop.arg2->tag == Iex_Const |
| && e->Iex.Binop.arg2->Iex.Binop.arg2->Iex.Const.con->tag == Ico_U8) { |
| UInt shift = e->Iex.Binop.arg2->Iex.Binop.arg2->Iex.Const.con->Ico.U8; |
| if (shift == 1 || shift == 2 || shift == 3) { |
| HReg r1 = iselIntExpr_R(env, e->Iex.Binop.arg1); |
| HReg r2 = iselIntExpr_R(env, e->Iex.Binop.arg2->Iex.Binop.arg1 ); |
| return AMD64AMode_IRRS(0, r1, r2, shift); |
| } |
| } |
| |
| /* Add64(expr,i) */ |
| if (e->tag == Iex_Binop |
| && e->Iex.Binop.op == Iop_Add64 |
| && e->Iex.Binop.arg2->tag == Iex_Const |
| && e->Iex.Binop.arg2->Iex.Const.con->tag == Ico_U64 |
| && fitsIn32Bits(e->Iex.Binop.arg2->Iex.Const.con->Ico.U64)) { |
| HReg r1 = iselIntExpr_R(env, e->Iex.Binop.arg1); |
| return AMD64AMode_IR( |
| (UInt)(0xFFFFFFFF & e->Iex.Binop.arg2->Iex.Const.con->Ico.U64), |
| r1 |
| ); |
| } |
| |
| /* Doesn't match anything in particular. Generate it into |
| a register and use that. */ |
| { |
| HReg r1 = iselIntExpr_R(env, e); |
| return AMD64AMode_IR(0, r1); |
| } |
| } |
| |
| |
| /* --------------------- RMIs --------------------- */ |
| |
| /* Similarly, calculate an expression into an X86RMI operand. As with |
| iselIntExpr_R, the expression can have type 32, 16 or 8 bits. */ |
| |
| static AMD64RMI* iselIntExpr_RMI ( ISelEnv* env, IRExpr* e ) |
| { |
| AMD64RMI* rmi = iselIntExpr_RMI_wrk(env, e); |
| /* sanity checks ... */ |
| switch (rmi->tag) { |
| case Armi_Imm: |
| return rmi; |
| case Armi_Reg: |
| vassert(hregClass(rmi->Armi.Reg.reg) == HRcInt64); |
| vassert(hregIsVirtual(rmi->Armi.Reg.reg)); |
| return rmi; |
| case Armi_Mem: |
| vassert(sane_AMode(rmi->Armi.Mem.am)); |
| return rmi; |
| default: |
| vpanic("iselIntExpr_RMI: unknown amd64 RMI tag"); |
| } |
| } |
| |
| /* DO NOT CALL THIS DIRECTLY ! */ |
| static AMD64RMI* iselIntExpr_RMI_wrk ( ISelEnv* env, IRExpr* e ) |
| { |
| IRType ty = typeOfIRExpr(env->type_env,e); |
| vassert(ty == Ity_I64 || ty == Ity_I32 |
| || ty == Ity_I16 || ty == Ity_I8); |
| |
| /* special case: immediate 64/32/16/8 */ |
| if (e->tag == Iex_Const) { |
| switch (e->Iex.Const.con->tag) { |
| case Ico_U64: |
| if (fitsIn32Bits(e->Iex.Const.con->Ico.U64)) { |
| return AMD64RMI_Imm(0xFFFFFFFF & e->Iex.Const.con->Ico.U64); |
| } |
| break; |
| case Ico_U32: |
| return AMD64RMI_Imm(e->Iex.Const.con->Ico.U32); break; |
| case Ico_U16: |
| return AMD64RMI_Imm(0xFFFF & e->Iex.Const.con->Ico.U16); break; |
| case Ico_U8: |
| return AMD64RMI_Imm(0xFF & e->Iex.Const.con->Ico.U8); break; |
| default: |
| vpanic("iselIntExpr_RMI.Iex_Const(amd64)"); |
| } |
| } |
| |
| /* special case: 64-bit GET */ |
| if (e->tag == Iex_Get && ty == Ity_I64) { |
| return AMD64RMI_Mem(AMD64AMode_IR(e->Iex.Get.offset, |
| hregAMD64_RBP())); |
| } |
| |
| /* special case: load from memory */ |
| |
| /* default case: calculate into a register and return that */ |
| { |
| HReg r = iselIntExpr_R ( env, e ); |
| return AMD64RMI_Reg(r); |
| } |
| } |
| |
| |
| /* --------------------- RIs --------------------- */ |
| |
| /* Calculate an expression into an AMD64RI operand. As with |
| iselIntExpr_R, the expression can have type 64, 32, 16 or 8 |
| bits. */ |
| |
| static AMD64RI* iselIntExpr_RI ( ISelEnv* env, IRExpr* e ) |
| { |
| AMD64RI* ri = iselIntExpr_RI_wrk(env, e); |
| /* sanity checks ... */ |
| switch (ri->tag) { |
| case Ari_Imm: |
| return ri; |
| case Armi_Reg: |
| vassert(hregClass(ri->Ari.Reg.reg) == HRcInt64); |
| vassert(hregIsVirtual(ri->Ari.Reg.reg)); |
| return ri; |
| default: |
| vpanic("iselIntExpr_RI: unknown amd64 RI tag"); |
| } |
| } |
| |
| /* DO NOT CALL THIS DIRECTLY ! */ |
| static AMD64RI* iselIntExpr_RI_wrk ( ISelEnv* env, IRExpr* e ) |
| { |
| IRType ty = typeOfIRExpr(env->type_env,e); |
| vassert(ty == Ity_I64 || ty == Ity_I32 |
| || ty == Ity_I16 || ty == Ity_I8); |
| |
| /* special case: immediate */ |
| if (e->tag == Iex_Const) { |
| switch (e->Iex.Const.con->tag) { |
| case Ico_U64: |
| if (fitsIn32Bits(e->Iex.Const.con->Ico.U64)) { |
| return AMD64RI_Imm(0xFFFFFFFF & e->Iex.Const.con->Ico.U64); |
| } |
| break; |
| case Ico_U32: |
| return AMD64RI_Imm(e->Iex.Const.con->Ico.U32); |
| case Ico_U16: |
| return AMD64RI_Imm(0xFFFF & e->Iex.Const.con->Ico.U16); |
| case Ico_U8: |
| return AMD64RI_Imm(0xFF & e->Iex.Const.con->Ico.U8); |
| default: |
| vpanic("iselIntExpr_RMI.Iex_Const(amd64)"); |
| } |
| } |
| |
| /* default case: calculate into a register and return that */ |
| { |
| HReg r = iselIntExpr_R ( env, e ); |
| return AMD64RI_Reg(r); |
| } |
| } |
| |
| |
| /* --------------------- RMs --------------------- */ |
| |
| /* Similarly, calculate an expression into an AMD64RM operand. As |
| with iselIntExpr_R, the expression can have type 64, 32, 16 or 8 |
| bits. */ |
| |
| static AMD64RM* iselIntExpr_RM ( ISelEnv* env, IRExpr* e ) |
| { |
| AMD64RM* rm = iselIntExpr_RM_wrk(env, e); |
| /* sanity checks ... */ |
| switch (rm->tag) { |
| case Arm_Reg: |
| vassert(hregClass(rm->Arm.Reg.reg) == HRcInt64); |
| vassert(hregIsVirtual(rm->Arm.Reg.reg)); |
| return rm; |
| case Arm_Mem: |
| vassert(sane_AMode(rm->Arm.Mem.am)); |
| return rm; |
| default: |
| vpanic("iselIntExpr_RM: unknown amd64 RM tag"); |
| } |
| } |
| |
| /* DO NOT CALL THIS DIRECTLY ! */ |
| static AMD64RM* iselIntExpr_RM_wrk ( ISelEnv* env, IRExpr* e ) |
| { |
| IRType ty = typeOfIRExpr(env->type_env,e); |
| vassert(ty == Ity_I64 || ty == Ity_I32 || ty == Ity_I16 || ty == Ity_I8); |
| |
| /* special case: 64-bit GET */ |
| if (e->tag == Iex_Get && ty == Ity_I64) { |
| return AMD64RM_Mem(AMD64AMode_IR(e->Iex.Get.offset, |
| hregAMD64_RBP())); |
| } |
| |
| /* special case: load from memory */ |
| |
| /* default case: calculate into a register and return that */ |
| { |
| HReg r = iselIntExpr_R ( env, e ); |
| return AMD64RM_Reg(r); |
| } |
| } |
| |
| |
| /* --------------------- CONDCODE --------------------- */ |
| |
| /* Generate code to evaluated a bit-typed expression, returning the |
| condition code which would correspond when the expression would |
| notionally have returned 1. */ |
| |
| static AMD64CondCode iselCondCode ( ISelEnv* env, IRExpr* e ) |
| { |
| /* Uh, there's nothing we can sanity check here, unfortunately. */ |
| return iselCondCode_wrk(env,e); |
| } |
| |
| /* DO NOT CALL THIS DIRECTLY ! */ |
| static AMD64CondCode iselCondCode_wrk ( ISelEnv* env, IRExpr* e ) |
| { |
| MatchInfo mi; |
| DECLARE_PATTERN(p_32to1_64to32); |
| //.. DECLARE_PATTERN(p_1Uto32_then_32to1); |
| //.. DECLARE_PATTERN(p_1Sto32_then_32to1); |
| |
| vassert(e); |
| vassert(typeOfIRExpr(env->type_env,e) == Ity_I1); |
| |
| //.. /* Constant 1:Bit */ |
| //.. if (e->tag == Iex_Const && e->Iex.Const.con->Ico.U1 == True) { |
| //.. HReg r; |
| //.. vassert(e->Iex.Const.con->tag == Ico_U1); |
| //.. r = newVRegI(env); |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_MOV,X86RMI_Imm(0),r)); |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_XOR,X86RMI_Reg(r),r)); |
| //.. return Xcc_Z; |
| //.. } |
| |
| /* Not1(...) */ |
| if (e->tag == Iex_Unop && e->Iex.Unop.op == Iop_Not1) { |
| /* Generate code for the arg, and negate the test condition */ |
| return 1 ^ iselCondCode(env, e->Iex.Unop.arg); |
| } |
| |
| //.. /* 32to1(1Uto32(expr1)) -- the casts are pointless, ignore them */ |
| //.. DEFINE_PATTERN(p_1Uto32_then_32to1, |
| //.. unop(Iop_32to1,unop(Iop_1Uto32,bind(0)))); |
| //.. if (matchIRExpr(&mi,p_1Uto32_then_32to1,e)) { |
| //.. IRExpr* expr1 = mi.bindee[0]; |
| //.. return iselCondCode(env, expr1); |
| //.. } |
| //.. |
| //.. /* 32to1(1Sto32(expr1)) -- the casts are pointless, ignore them */ |
| //.. DEFINE_PATTERN(p_1Sto32_then_32to1, |
| //.. unop(Iop_32to1,unop(Iop_1Sto32,bind(0)))); |
| //.. if (matchIRExpr(&mi,p_1Sto32_then_32to1,e)) { |
| //.. IRExpr* expr1 = mi.bindee[0]; |
| //.. return iselCondCode(env, expr1); |
| //.. } |
| |
| /* pattern: 32to1(64to32(expr64)) */ |
| DEFINE_PATTERN(p_32to1_64to32, |
| unop(Iop_32to1,unop(Iop_64to32, bind(0))) |
| ); |
| if (matchIRExpr(&mi,p_32to1_64to32,e)) { |
| AMD64RM* rm = iselIntExpr_RM(env, mi.bindee[0]); |
| addInstr(env, AMD64Instr_Test64(AMD64RI_Imm(1),rm)); |
| return Acc_NZ; |
| } |
| |
| //.. /* CmpEQ8 / CmpNE8 */ |
| //.. if (e->tag == Iex_Binop |
| //.. && (e->Iex.Binop.op == Iop_CmpEQ8 |
| //.. || e->Iex.Binop.op == Iop_CmpNE8)) { |
| //.. HReg r1 = iselIntExpr_R(env, e->Iex.Binop.arg1); |
| //.. X86RMI* rmi2 = iselIntExpr_RMI(env, e->Iex.Binop.arg2); |
| //.. HReg r = newVRegI(env); |
| //.. addInstr(env, mk_iMOVsd_RR(r1,r)); |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_XOR,rmi2,r)); |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_AND,X86RMI_Imm(0xFF),r)); |
| //.. switch (e->Iex.Binop.op) { |
| //.. case Iop_CmpEQ8: return Xcc_Z; |
| //.. case Iop_CmpNE8: return Xcc_NZ; |
| //.. default: vpanic("iselCondCode(x86): CmpXX8"); |
| //.. } |
| //.. } |
| //.. |
| //.. /* CmpEQ16 / CmpNE16 */ |
| //.. if (e->tag == Iex_Binop |
| //.. && (e->Iex.Binop.op == Iop_CmpEQ16 |
| //.. || e->Iex.Binop.op == Iop_CmpNE16)) { |
| //.. HReg r1 = iselIntExpr_R(env, e->Iex.Binop.arg1); |
| //.. X86RMI* rmi2 = iselIntExpr_RMI(env, e->Iex.Binop.arg2); |
| //.. HReg r = newVRegI(env); |
| //.. addInstr(env, mk_iMOVsd_RR(r1,r)); |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_XOR,rmi2,r)); |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_AND,X86RMI_Imm(0xFFFF),r)); |
| //.. switch (e->Iex.Binop.op) { |
| //.. case Iop_CmpEQ16: return Xcc_Z; |
| //.. case Iop_CmpNE16: return Xcc_NZ; |
| //.. default: vpanic("iselCondCode(x86): CmpXX16"); |
| //.. } |
| //.. } |
| //.. |
| //.. /* CmpNE32(1Sto32(b), 0) ==> b */ |
| //.. { |
| //.. DECLARE_PATTERN(p_CmpNE32_1Sto32); |
| //.. DEFINE_PATTERN( |
| //.. p_CmpNE32_1Sto32, |
| //.. binop(Iop_CmpNE32, unop(Iop_1Sto32,bind(0)), mkU32(0))); |
| //.. if (matchIRExpr(&mi, p_CmpNE32_1Sto32, e)) { |
| //.. return iselCondCode(env, mi.bindee[0]); |
| //.. } |
| //.. } |
| |
| /* Cmp*64*(x,y) */ |
| if (e->tag == Iex_Binop |
| && (e->Iex.Binop.op == Iop_CmpEQ64 |
| || e->Iex.Binop.op == Iop_CmpNE64 |
| //|| e->Iex.Binop.op == Iop_CmpLT64S |
| //|| e->Iex.Binop.op == Iop_CmpLT64U |
| //|| e->Iex.Binop.op == Iop_CmpLE64S |
| //|| e->Iex.Binop.op == Iop_CmpLE64U |
| )) { |
| HReg r1 = iselIntExpr_R(env, e->Iex.Binop.arg1); |
| AMD64RMI* rmi2 = iselIntExpr_RMI(env, e->Iex.Binop.arg2); |
| addInstr(env, AMD64Instr_Alu64R(Aalu_CMP,rmi2,r1)); |
| switch (e->Iex.Binop.op) { |
| case Iop_CmpEQ64: return Acc_Z; |
| case Iop_CmpNE64: return Acc_NZ; |
| //case Iop_CmpLT64S: return Acc_L; |
| //case Iop_CmpLT64U: return Acc_B; |
| //case Iop_CmpLE64S: return Acc_LE; |
| //case Iop_CmpLE64U: return Acc_BE; |
| default: vpanic("iselCondCode(amd64): CmpXX64"); |
| } |
| } |
| |
| //.. /* CmpNE64(1Sto64(b), 0) ==> b */ |
| //.. { |
| //.. DECLARE_PATTERN(p_CmpNE64_1Sto64); |
| //.. DEFINE_PATTERN( |
| //.. p_CmpNE64_1Sto64, |
| //.. binop(Iop_CmpNE64, unop(Iop_1Sto64,bind(0)), mkU64(0))); |
| //.. if (matchIRExpr(&mi, p_CmpNE64_1Sto64, e)) { |
| //.. return iselCondCode(env, mi.bindee[0]); |
| //.. } |
| //.. } |
| //.. |
| //.. /* CmpNE64(x, 0) */ |
| //.. { |
| //.. DECLARE_PATTERN(p_CmpNE64_x_zero); |
| //.. DEFINE_PATTERN( |
| //.. p_CmpNE64_x_zero, |
| //.. binop(Iop_CmpNE64, bind(0), mkU64(0)) ); |
| //.. if (matchIRExpr(&mi, p_CmpNE64_x_zero, e)) { |
| //.. HReg hi, lo; |
| //.. IRExpr* x = mi.bindee[0]; |
| //.. HReg tmp = newVRegI(env); |
| //.. iselInt64Expr( &hi, &lo, env, x ); |
| //.. addInstr(env, mk_iMOVsd_RR(hi, tmp)); |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_OR,X86RMI_Reg(lo), tmp)); |
| //.. return Xcc_NZ; |
| //.. } |
| //.. } |
| //.. |
| //.. /* CmpNE64 */ |
| //.. if (e->tag == Iex_Binop |
| //.. && e->Iex.Binop.op == Iop_CmpNE64) { |
| //.. HReg hi1, hi2, lo1, lo2; |
| //.. HReg tHi = newVRegI(env); |
| //.. HReg tLo = newVRegI(env); |
| //.. iselInt64Expr( &hi1, &lo1, env, e->Iex.Binop.arg1 ); |
| //.. iselInt64Expr( &hi2, &lo2, env, e->Iex.Binop.arg2 ); |
| //.. addInstr(env, mk_iMOVsd_RR(hi1, tHi)); |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_XOR,X86RMI_Reg(hi2), tHi)); |
| //.. addInstr(env, mk_iMOVsd_RR(lo1, tLo)); |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_XOR,X86RMI_Reg(lo2), tLo)); |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_OR,X86RMI_Reg(tHi), tLo)); |
| //.. switch (e->Iex.Binop.op) { |
| //.. case Iop_CmpNE64: return Xcc_NZ; |
| //.. default: vpanic("iselCondCode(x86): CmpXX64"); |
| //.. } |
| //.. } |
| //.. |
| //.. /* var */ |
| //.. if (e->tag == Iex_Tmp) { |
| //.. HReg r32 = lookupIRTemp(env, e->Iex.Tmp.tmp); |
| //.. HReg dst = newVRegI(env); |
| //.. addInstr(env, mk_iMOVsd_RR(r32,dst)); |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_AND,X86RMI_Imm(1),dst)); |
| //.. return Xcc_NZ; |
| //.. } |
| |
| ppIRExpr(e); |
| vpanic("iselCondCode(amd64)"); |
| } |
| |
| |
| /*---------------------------------------------------------*/ |
| /*--- ISEL: Integer expressions (128 bit) ---*/ |
| /*---------------------------------------------------------*/ |
| |
| /* Compute a 128-bit value into a register pair, which is returned as |
| the first two parameters. As with iselIntExpr_R, these may be |
| either real or virtual regs; in any case they must not be changed |
| by subsequent code emitted by the caller. */ |
| |
| static void iselInt128Expr ( HReg* rHi, HReg* rLo, |
| ISelEnv* env, IRExpr* e ) |
| { |
| iselInt128Expr_wrk(rHi, rLo, env, e); |
| # if 0 |
| vex_printf("\n"); ppIRExpr(e); vex_printf("\n"); |
| # endif |
| vassert(hregClass(*rHi) == HRcInt64); |
| vassert(hregIsVirtual(*rHi)); |
| vassert(hregClass(*rLo) == HRcInt64); |
| vassert(hregIsVirtual(*rLo)); |
| } |
| |
| /* DO NOT CALL THIS DIRECTLY ! */ |
| static void iselInt128Expr_wrk ( HReg* rHi, HReg* rLo, |
| ISelEnv* env, IRExpr* e ) |
| { |
| //.. HWord fn = 0; /* helper fn for most SIMD64 stuff */ |
| vassert(e); |
| vassert(typeOfIRExpr(env->type_env,e) == Ity_I128); |
| |
| //.. /* 64-bit literal */ |
| //.. if (e->tag == Iex_Const) { |
| //.. ULong w64 = e->Iex.Const.con->Ico.U64; |
| //.. UInt wHi = ((UInt)(w64 >> 32)) & 0xFFFFFFFF; |
| //.. UInt wLo = ((UInt)w64) & 0xFFFFFFFF; |
| //.. HReg tLo = newVRegI(env); |
| //.. HReg tHi = newVRegI(env); |
| //.. vassert(e->Iex.Const.con->tag == Ico_U64); |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_MOV, X86RMI_Imm(wHi), tHi)); |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_MOV, X86RMI_Imm(wLo), tLo)); |
| //.. *rHi = tHi; |
| //.. *rLo = tLo; |
| //.. return; |
| //.. } |
| |
| /* read 128-bit IRTemp */ |
| if (e->tag == Iex_Tmp) { |
| lookupIRTemp128( rHi, rLo, env, e->Iex.Tmp.tmp); |
| return; |
| } |
| |
| //.. /* 64-bit load */ |
| //.. if (e->tag == Iex_LDle) { |
| //.. HReg tLo, tHi; |
| //.. X86AMode *am0, *am4; |
| //.. vassert(e->Iex.LDle.ty == Ity_I64); |
| //.. tLo = newVRegI(env); |
| //.. tHi = newVRegI(env); |
| //.. am0 = iselIntExpr_AMode(env, e->Iex.LDle.addr); |
| //.. am4 = advance4(am0); |
| //.. addInstr(env, X86Instr_Alu32R( Xalu_MOV, X86RMI_Mem(am0), tLo )); |
| //.. addInstr(env, X86Instr_Alu32R( Xalu_MOV, X86RMI_Mem(am4), tHi )); |
| //.. *rHi = tHi; |
| //.. *rLo = tLo; |
| //.. return; |
| //.. } |
| //.. |
| //.. /* 64-bit GET */ |
| //.. if (e->tag == Iex_Get) { |
| //.. X86AMode* am = X86AMode_IR(e->Iex.Get.offset, hregX86_EBP()); |
| //.. X86AMode* am4 = advance4(am); |
| //.. HReg tLo = newVRegI(env); |
| //.. HReg tHi = newVRegI(env); |
| //.. addInstr(env, X86Instr_Alu32R( Xalu_MOV, X86RMI_Mem(am), tLo )); |
| //.. addInstr(env, X86Instr_Alu32R( Xalu_MOV, X86RMI_Mem(am4), tHi )); |
| //.. *rHi = tHi; |
| //.. *rLo = tLo; |
| //.. return; |
| //.. } |
| //.. |
| //.. /* 64-bit GETI */ |
| //.. if (e->tag == Iex_GetI) { |
| //.. X86AMode* am |
| //.. = genGuestArrayOffset( env, e->Iex.GetI.descr, |
| //.. e->Iex.GetI.ix, e->Iex.GetI.bias ); |
| //.. X86AMode* am4 = advance4(am); |
| //.. HReg tLo = newVRegI(env); |
| //.. HReg tHi = newVRegI(env); |
| //.. addInstr(env, X86Instr_Alu32R( Xalu_MOV, X86RMI_Mem(am), tLo )); |
| //.. addInstr(env, X86Instr_Alu32R( Xalu_MOV, X86RMI_Mem(am4), tHi )); |
| //.. *rHi = tHi; |
| //.. *rLo = tLo; |
| //.. return; |
| //.. } |
| //.. |
| //.. /* 64-bit Mux0X */ |
| //.. if (e->tag == Iex_Mux0X) { |
| //.. HReg e0Lo, e0Hi, eXLo, eXHi, r8; |
| //.. HReg tLo = newVRegI(env); |
| //.. HReg tHi = newVRegI(env); |
| //.. iselInt64Expr(&e0Hi, &e0Lo, env, e->Iex.Mux0X.expr0); |
| //.. iselInt64Expr(&eXHi, &eXLo, env, e->Iex.Mux0X.exprX); |
| //.. addInstr(env, mk_iMOVsd_RR(eXHi, tHi)); |
| //.. addInstr(env, mk_iMOVsd_RR(eXLo, tLo)); |
| //.. r8 = iselIntExpr_R(env, e->Iex.Mux0X.cond); |
| //.. addInstr(env, X86Instr_Test32(X86RI_Imm(0xFF), X86RM_Reg(r8))); |
| //.. /* This assumes the first cmov32 doesn't trash the condition |
| //.. codes, so they are still available for the second cmov32 */ |
| //.. addInstr(env, X86Instr_CMov32(Xcc_Z,X86RM_Reg(e0Hi),tHi)); |
| //.. addInstr(env, X86Instr_CMov32(Xcc_Z,X86RM_Reg(e0Lo),tLo)); |
| //.. *rHi = tHi; |
| //.. *rLo = tLo; |
| //.. return; |
| //.. } |
| |
| /* --------- BINARY ops --------- */ |
| if (e->tag == Iex_Binop) { |
| switch (e->Iex.Binop.op) { |
| /* 64 x 64 -> 128 multiply */ |
| case Iop_MullU64: |
| case Iop_MullS64: { |
| /* get one operand into %rax, and the other into a R/M. |
| Need to make an educated guess about which is better in |
| which. */ |
| HReg tLo = newVRegI(env); |
| HReg tHi = newVRegI(env); |
| Bool syned = e->Iex.Binop.op == Iop_MullS64; |
| AMD64RM* rmLeft = iselIntExpr_RM(env, e->Iex.Binop.arg1); |
| HReg rRight = iselIntExpr_R(env, e->Iex.Binop.arg2); |
| addInstr(env, mk_iMOVsd_RR(rRight, hregAMD64_RAX())); |
| addInstr(env, AMD64Instr_MulL(syned, 8, rmLeft)); |
| /* Result is now in RDX:RAX. Tell the caller. */ |
| addInstr(env, mk_iMOVsd_RR(hregAMD64_RDX(), tHi)); |
| addInstr(env, mk_iMOVsd_RR(hregAMD64_RAX(), tLo)); |
| *rHi = tHi; |
| *rLo = tLo; |
| return; |
| } |
| |
| //.. /* Or64/And64/Xor64 */ |
| //.. case Iop_Or64: |
| //.. case Iop_And64: |
| //.. case Iop_Xor64: { |
| //.. HReg xLo, xHi, yLo, yHi; |
| //.. HReg tLo = newVRegI(env); |
| //.. HReg tHi = newVRegI(env); |
| //.. X86AluOp op = e->Iex.Binop.op==Iop_Or64 ? Xalu_OR |
| //.. : e->Iex.Binop.op==Iop_And64 ? Xalu_AND |
| //.. : Xalu_XOR; |
| //.. iselInt64Expr(&xHi, &xLo, env, e->Iex.Binop.arg1); |
| //.. addInstr(env, mk_iMOVsd_RR(xHi, tHi)); |
| //.. addInstr(env, mk_iMOVsd_RR(xLo, tLo)); |
| //.. iselInt64Expr(&yHi, &yLo, env, e->Iex.Binop.arg2); |
| //.. addInstr(env, X86Instr_Alu32R(op, X86RMI_Reg(yHi), tHi)); |
| //.. addInstr(env, X86Instr_Alu32R(op, X86RMI_Reg(yLo), tLo)); |
| //.. *rHi = tHi; |
| //.. *rLo = tLo; |
| //.. return; |
| //.. } |
| //.. |
| //.. /* Add64/Sub64 */ |
| //.. case Iop_Add64: |
| //.. case Iop_Sub64: { |
| //.. HReg xLo, xHi, yLo, yHi; |
| //.. HReg tLo = newVRegI(env); |
| //.. HReg tHi = newVRegI(env); |
| //.. iselInt64Expr(&xHi, &xLo, env, e->Iex.Binop.arg1); |
| //.. addInstr(env, mk_iMOVsd_RR(xHi, tHi)); |
| //.. addInstr(env, mk_iMOVsd_RR(xLo, tLo)); |
| //.. iselInt64Expr(&yHi, &yLo, env, e->Iex.Binop.arg2); |
| //.. if (e->Iex.Binop.op==Iop_Add64) { |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_ADD, X86RMI_Reg(yLo), tLo)); |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_ADC, X86RMI_Reg(yHi), tHi)); |
| //.. } else { |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_SUB, X86RMI_Reg(yLo), tLo)); |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_SBB, X86RMI_Reg(yHi), tHi)); |
| //.. } |
| //.. *rHi = tHi; |
| //.. *rLo = tLo; |
| //.. return; |
| //.. } |
| //.. |
| //.. /* 32HLto64(e1,e2) */ |
| //.. case Iop_32HLto64: |
| //.. *rHi = iselIntExpr_R(env, e->Iex.Binop.arg1); |
| //.. *rLo = iselIntExpr_R(env, e->Iex.Binop.arg2); |
| //.. return; |
| //.. |
| //.. /* 64-bit shifts */ |
| //.. case Iop_Shl64: { |
| //.. /* We use the same ingenious scheme as gcc. Put the value |
| //.. to be shifted into %hi:%lo, and the shift amount into |
| //.. %cl. Then (dsts on right, a la ATT syntax): |
| //.. |
| //.. shldl %cl, %lo, %hi -- make %hi be right for the |
| //.. -- shift amt %cl % 32 |
| //.. shll %cl, %lo -- make %lo be right for the |
| //.. -- shift amt %cl % 32 |
| //.. |
| //.. Now, if (shift amount % 64) is in the range 32 .. 63, |
| //.. we have to do a fixup, which puts the result low half |
| //.. into the result high half, and zeroes the low half: |
| //.. |
| //.. testl $32, %ecx |
| //.. |
| //.. cmovnz %lo, %hi |
| //.. movl $0, %tmp -- sigh; need yet another reg |
| //.. cmovnz %tmp, %lo |
| //.. */ |
| //.. HReg rAmt, sHi, sLo, tHi, tLo, tTemp; |
| //.. tLo = newVRegI(env); |
| //.. tHi = newVRegI(env); |
| //.. tTemp = newVRegI(env); |
| //.. rAmt = iselIntExpr_R(env, e->Iex.Binop.arg2); |
| //.. iselInt64Expr(&sHi,&sLo, env, e->Iex.Binop.arg1); |
| //.. addInstr(env, mk_iMOVsd_RR(rAmt, hregX86_ECX())); |
| //.. addInstr(env, mk_iMOVsd_RR(sHi, tHi)); |
| //.. addInstr(env, mk_iMOVsd_RR(sLo, tLo)); |
| //.. /* Ok. Now shift amt is in %ecx, and value is in tHi/tLo |
| //.. and those regs are legitimately modifiable. */ |
| //.. addInstr(env, X86Instr_Sh3232(Xsh_SHL, 0/*%cl*/, tLo, tHi)); |
| //.. addInstr(env, X86Instr_Sh32(Xsh_SHL, 0/*%cl*/, X86RM_Reg(tLo))); |
| //.. addInstr(env, X86Instr_Test32(X86RI_Imm(32), |
| //.. X86RM_Reg(hregX86_ECX()))); |
| //.. addInstr(env, X86Instr_CMov32(Xcc_NZ, X86RM_Reg(tLo), tHi)); |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_MOV, X86RMI_Imm(0), tTemp)); |
| //.. addInstr(env, X86Instr_CMov32(Xcc_NZ, X86RM_Reg(tTemp), tLo)); |
| //.. *rHi = tHi; |
| //.. *rLo = tLo; |
| //.. return; |
| //.. } |
| //.. |
| //.. case Iop_Shr64: { |
| //.. /* We use the same ingenious scheme as gcc. Put the value |
| //.. to be shifted into %hi:%lo, and the shift amount into |
| //.. %cl. Then: |
| //.. |
| //.. shrdl %cl, %hi, %lo -- make %lo be right for the |
| //.. -- shift amt %cl % 32 |
| //.. shrl %cl, %hi -- make %hi be right for the |
| //.. -- shift amt %cl % 32 |
| //.. |
| //.. Now, if (shift amount % 64) is in the range 32 .. 63, |
| //.. we have to do a fixup, which puts the result high half |
| //.. into the result low half, and zeroes the high half: |
| //.. |
| //.. testl $32, %ecx |
| //.. |
| //.. cmovnz %hi, %lo |
| //.. movl $0, %tmp -- sigh; need yet another reg |
| //.. cmovnz %tmp, %hi |
| //.. */ |
| //.. HReg rAmt, sHi, sLo, tHi, tLo, tTemp; |
| //.. tLo = newVRegI(env); |
| //.. tHi = newVRegI(env); |
| //.. tTemp = newVRegI(env); |
| //.. rAmt = iselIntExpr_R(env, e->Iex.Binop.arg2); |
| //.. iselInt64Expr(&sHi,&sLo, env, e->Iex.Binop.arg1); |
| //.. addInstr(env, mk_iMOVsd_RR(rAmt, hregX86_ECX())); |
| //.. addInstr(env, mk_iMOVsd_RR(sHi, tHi)); |
| //.. addInstr(env, mk_iMOVsd_RR(sLo, tLo)); |
| //.. /* Ok. Now shift amt is in %ecx, and value is in tHi/tLo |
| //.. and those regs are legitimately modifiable. */ |
| //.. addInstr(env, X86Instr_Sh3232(Xsh_SHR, 0/*%cl*/, tHi, tLo)); |
| //.. addInstr(env, X86Instr_Sh32(Xsh_SHR, 0/*%cl*/, X86RM_Reg(tHi))); |
| //.. addInstr(env, X86Instr_Test32(X86RI_Imm(32), |
| //.. X86RM_Reg(hregX86_ECX()))); |
| //.. addInstr(env, X86Instr_CMov32(Xcc_NZ, X86RM_Reg(tHi), tLo)); |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_MOV, X86RMI_Imm(0), tTemp)); |
| //.. addInstr(env, X86Instr_CMov32(Xcc_NZ, X86RM_Reg(tTemp), tHi)); |
| //.. *rHi = tHi; |
| //.. *rLo = tLo; |
| //.. return; |
| //.. } |
| //.. |
| //.. /* F64 -> I64 */ |
| //.. /* Sigh, this is an almost exact copy of the F64 -> I32/I16 |
| //.. case. Unfortunately I see no easy way to avoid the |
| //.. duplication. */ |
| //.. case Iop_F64toI64: { |
| //.. HReg rf = iselDblExpr(env, e->Iex.Binop.arg2); |
| //.. HReg tLo = newVRegI(env); |
| //.. HReg tHi = newVRegI(env); |
| //.. |
| //.. /* Used several times ... */ |
| //.. /* Careful ... this sharing is only safe because |
| //.. zero_esp/four_esp do not hold any registers which the |
| //.. register allocator could attempt to swizzle later. */ |
| //.. X86AMode* zero_esp = X86AMode_IR(0, hregX86_ESP()); |
| //.. X86AMode* four_esp = X86AMode_IR(4, hregX86_ESP()); |
| //.. |
| //.. /* rf now holds the value to be converted, and rrm holds |
| //.. the rounding mode value, encoded as per the |
| //.. IRRoundingMode enum. The first thing to do is set the |
| //.. FPU's rounding mode accordingly. */ |
| //.. |
| //.. /* Create a space for the format conversion. */ |
| //.. /* subl $8, %esp */ |
| //.. sub_from_esp(env, 8); |
| //.. |
| //.. /* Set host rounding mode */ |
| //.. set_FPU_rounding_mode( env, e->Iex.Binop.arg1 ); |
| //.. |
| //.. /* gistll %rf, 0(%esp) */ |
| //.. addInstr(env, X86Instr_FpLdStI(False/*store*/, 8, rf, zero_esp)); |
| //.. |
| //.. /* movl 0(%esp), %dstLo */ |
| //.. /* movl 4(%esp), %dstHi */ |
| //.. addInstr(env, X86Instr_Alu32R( |
| //.. Xalu_MOV, X86RMI_Mem(zero_esp), tLo)); |
| //.. addInstr(env, X86Instr_Alu32R( |
| //.. Xalu_MOV, X86RMI_Mem(four_esp), tHi)); |
| //.. |
| //.. /* Restore default FPU rounding. */ |
| //.. set_FPU_rounding_default( env ); |
| //.. |
| //.. /* addl $8, %esp */ |
| //.. add_to_esp(env, 8); |
| //.. |
| //.. *rHi = tHi; |
| //.. *rLo = tLo; |
| //.. return; |
| //.. } |
| //.. |
| //.. case Iop_Add8x8: |
| //.. fn = (HWord)h_generic_calc_Add8x8; goto binnish; |
| //.. case Iop_Add16x4: |
| //.. fn = (HWord)h_generic_calc_Add16x4; goto binnish; |
| //.. case Iop_Add32x2: |
| //.. fn = (HWord)h_generic_calc_Add32x2; goto binnish; |
| //.. |
| //.. case Iop_Avg8Ux8: |
| //.. fn = (HWord)h_generic_calc_Avg8Ux8; goto binnish; |
| //.. case Iop_Avg16Ux4: |
| //.. fn = (HWord)h_generic_calc_Avg16Ux4; goto binnish; |
| //.. |
| //.. case Iop_CmpEQ8x8: |
| //.. fn = (HWord)h_generic_calc_CmpEQ8x8; goto binnish; |
| //.. case Iop_CmpEQ16x4: |
| //.. fn = (HWord)h_generic_calc_CmpEQ16x4; goto binnish; |
| //.. case Iop_CmpEQ32x2: |
| //.. fn = (HWord)h_generic_calc_CmpEQ32x2; goto binnish; |
| //.. |
| //.. case Iop_CmpGT8Sx8: |
| //.. fn = (HWord)h_generic_calc_CmpGT8Sx8; goto binnish; |
| //.. case Iop_CmpGT16Sx4: |
| //.. fn = (HWord)h_generic_calc_CmpGT16Sx4; goto binnish; |
| //.. case Iop_CmpGT32Sx2: |
| //.. fn = (HWord)h_generic_calc_CmpGT32Sx2; goto binnish; |
| //.. |
| //.. case Iop_InterleaveHI8x8: |
| //.. fn = (HWord)h_generic_calc_InterleaveHI8x8; goto binnish; |
| //.. case Iop_InterleaveLO8x8: |
| //.. fn = (HWord)h_generic_calc_InterleaveLO8x8; goto binnish; |
| //.. case Iop_InterleaveHI16x4: |
| //.. fn = (HWord)h_generic_calc_InterleaveHI16x4; goto binnish; |
| //.. case Iop_InterleaveLO16x4: |
| //.. fn = (HWord)h_generic_calc_InterleaveLO16x4; goto binnish; |
| //.. case Iop_InterleaveHI32x2: |
| //.. fn = (HWord)h_generic_calc_InterleaveHI32x2; goto binnish; |
| //.. case Iop_InterleaveLO32x2: |
| //.. fn = (HWord)h_generic_calc_InterleaveLO32x2; goto binnish; |
| //.. |
| //.. case Iop_Max8Ux8: |
| //.. fn = (HWord)h_generic_calc_Max8Ux8; goto binnish; |
| //.. case Iop_Max16Sx4: |
| //.. fn = (HWord)h_generic_calc_Max16Sx4; goto binnish; |
| //.. case Iop_Min8Ux8: |
| //.. fn = (HWord)h_generic_calc_Min8Ux8; goto binnish; |
| //.. case Iop_Min16Sx4: |
| //.. fn = (HWord)h_generic_calc_Min16Sx4; goto binnish; |
| //.. |
| //.. case Iop_Mul16x4: |
| //.. fn = (HWord)h_generic_calc_Mul16x4; goto binnish; |
| //.. case Iop_MulHi16Sx4: |
| //.. fn = (HWord)h_generic_calc_MulHi16Sx4; goto binnish; |
| //.. case Iop_MulHi16Ux4: |
| //.. fn = (HWord)h_generic_calc_MulHi16Ux4; goto binnish; |
| //.. |
| //.. case Iop_QAdd8Sx8: |
| //.. fn = (HWord)h_generic_calc_QAdd8Sx8; goto binnish; |
| //.. case Iop_QAdd16Sx4: |
| //.. fn = (HWord)h_generic_calc_QAdd16Sx4; goto binnish; |
| //.. case Iop_QAdd8Ux8: |
| //.. fn = (HWord)h_generic_calc_QAdd8Ux8; goto binnish; |
| //.. case Iop_QAdd16Ux4: |
| //.. fn = (HWord)h_generic_calc_QAdd16Ux4; goto binnish; |
| //.. |
| //.. case Iop_QNarrow32Sx2: |
| //.. fn = (HWord)h_generic_calc_QNarrow32Sx2; goto binnish; |
| //.. case Iop_QNarrow16Sx4: |
| //.. fn = (HWord)h_generic_calc_QNarrow16Sx4; goto binnish; |
| //.. case Iop_QNarrow16Ux4: |
| //.. fn = (HWord)h_generic_calc_QNarrow16Ux4; goto binnish; |
| //.. |
| //.. case Iop_QSub8Sx8: |
| //.. fn = (HWord)h_generic_calc_QSub8Sx8; goto binnish; |
| //.. case Iop_QSub16Sx4: |
| //.. fn = (HWord)h_generic_calc_QSub16Sx4; goto binnish; |
| //.. case Iop_QSub8Ux8: |
| //.. fn = (HWord)h_generic_calc_QSub8Ux8; goto binnish; |
| //.. case Iop_QSub16Ux4: |
| //.. fn = (HWord)h_generic_calc_QSub16Ux4; goto binnish; |
| //.. |
| //.. case Iop_Sub8x8: |
| //.. fn = (HWord)h_generic_calc_Sub8x8; goto binnish; |
| //.. case Iop_Sub16x4: |
| //.. fn = (HWord)h_generic_calc_Sub16x4; goto binnish; |
| //.. case Iop_Sub32x2: |
| //.. fn = (HWord)h_generic_calc_Sub32x2; goto binnish; |
| //.. |
| //.. binnish: { |
| //.. /* Note: the following assumes all helpers are of |
| //.. signature |
| //.. ULong fn ( ULong, ULong ), and they are |
| //.. not marked as regparm functions. |
| //.. */ |
| //.. HReg xLo, xHi, yLo, yHi; |
| //.. HReg tLo = newVRegI(env); |
| //.. HReg tHi = newVRegI(env); |
| //.. iselInt64Expr(&yHi, &yLo, env, e->Iex.Binop.arg2); |
| //.. addInstr(env, X86Instr_Push(X86RMI_Reg(yHi))); |
| //.. addInstr(env, X86Instr_Push(X86RMI_Reg(yLo))); |
| //.. iselInt64Expr(&xHi, &xLo, env, e->Iex.Binop.arg1); |
| //.. addInstr(env, X86Instr_Push(X86RMI_Reg(xHi))); |
| //.. addInstr(env, X86Instr_Push(X86RMI_Reg(xLo))); |
| //.. addInstr(env, X86Instr_Call( Xcc_ALWAYS, (UInt)fn, 0 )); |
| //.. add_to_esp(env, 4*4); |
| //.. addInstr(env, mk_iMOVsd_RR(hregX86_EDX(), tHi)); |
| //.. addInstr(env, mk_iMOVsd_RR(hregX86_EAX(), tLo)); |
| //.. *rHi = tHi; |
| //.. *rLo = tLo; |
| //.. return; |
| //.. } |
| //.. |
| //.. case Iop_ShlN32x2: |
| //.. fn = (HWord)h_generic_calc_ShlN32x2; goto shifty; |
| //.. case Iop_ShlN16x4: |
| //.. fn = (HWord)h_generic_calc_ShlN16x4; goto shifty; |
| //.. case Iop_ShrN32x2: |
| //.. fn = (HWord)h_generic_calc_ShrN32x2; goto shifty; |
| //.. case Iop_ShrN16x4: |
| //.. fn = (HWord)h_generic_calc_ShrN16x4; goto shifty; |
| //.. case Iop_SarN32x2: |
| //.. fn = (HWord)h_generic_calc_SarN32x2; goto shifty; |
| //.. case Iop_SarN16x4: |
| //.. fn = (HWord)h_generic_calc_SarN16x4; goto shifty; |
| //.. shifty: { |
| //.. /* Note: the following assumes all helpers are of |
| //.. signature |
| //.. ULong fn ( ULong, UInt ), and they are |
| //.. not marked as regparm functions. |
| //.. */ |
| //.. HReg xLo, xHi; |
| //.. HReg tLo = newVRegI(env); |
| //.. HReg tHi = newVRegI(env); |
| //.. X86RMI* y = iselIntExpr_RMI(env, e->Iex.Binop.arg2); |
| //.. addInstr(env, X86Instr_Push(y)); |
| //.. iselInt64Expr(&xHi, &xLo, env, e->Iex.Binop.arg1); |
| //.. addInstr(env, X86Instr_Push(X86RMI_Reg(xHi))); |
| //.. addInstr(env, X86Instr_Push(X86RMI_Reg(xLo))); |
| //.. addInstr(env, X86Instr_Call( Xcc_ALWAYS, (UInt)fn, 0 )); |
| //.. add_to_esp(env, 3*4); |
| //.. addInstr(env, mk_iMOVsd_RR(hregX86_EDX(), tHi)); |
| //.. addInstr(env, mk_iMOVsd_RR(hregX86_EAX(), tLo)); |
| //.. *rHi = tHi; |
| //.. *rLo = tLo; |
| //.. return; |
| //.. } |
| |
| default: |
| break; |
| } |
| } /* if (e->tag == Iex_Binop) */ |
| |
| |
| //.. /* --------- UNARY ops --------- */ |
| //.. if (e->tag == Iex_Unop) { |
| //.. switch (e->Iex.Unop.op) { |
| //.. |
| //.. /* 32Sto64(e) */ |
| //.. case Iop_32Sto64: { |
| //.. HReg tLo = newVRegI(env); |
| //.. HReg tHi = newVRegI(env); |
| //.. HReg src = iselIntExpr_R(env, e->Iex.Unop.arg); |
| //.. addInstr(env, mk_iMOVsd_RR(src,tHi)); |
| //.. addInstr(env, mk_iMOVsd_RR(src,tLo)); |
| //.. addInstr(env, X86Instr_Sh32(Xsh_SAR, 31, X86RM_Reg(tHi))); |
| //.. *rHi = tHi; |
| //.. *rLo = tLo; |
| //.. return; |
| //.. } |
| //.. |
| //.. /* 32Uto64(e) */ |
| //.. case Iop_32Uto64: { |
| //.. HReg tLo = newVRegI(env); |
| //.. HReg tHi = newVRegI(env); |
| //.. HReg src = iselIntExpr_R(env, e->Iex.Unop.arg); |
| //.. addInstr(env, mk_iMOVsd_RR(src,tLo)); |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_MOV, X86RMI_Imm(0), tHi)); |
| //.. *rHi = tHi; |
| //.. *rLo = tLo; |
| //.. return; |
| //.. } |
| //.. |
| //.. /* 128{HI}to64 */ |
| //.. case Iop_128HIto64: |
| //.. case Iop_128to64: { |
| //.. Int off = e->Iex.Unop.op==Iop_128HIto64 ? 8 : 0; |
| //.. HReg tLo = newVRegI(env); |
| //.. HReg tHi = newVRegI(env); |
| //.. HReg vec = iselVecExpr(env, e->Iex.Unop.arg); |
| //.. X86AMode* esp0 = X86AMode_IR(0, hregX86_ESP()); |
| //.. X86AMode* espLO = X86AMode_IR(off, hregX86_ESP()); |
| //.. X86AMode* espHI = X86AMode_IR(off+4, hregX86_ESP()); |
| //.. sub_from_esp(env, 16); |
| //.. addInstr(env, X86Instr_SseLdSt(False/*store*/, vec, esp0)); |
| //.. addInstr(env, X86Instr_Alu32R( Xalu_MOV, |
| //.. X86RMI_Mem(espLO), tLo )); |
| //.. addInstr(env, X86Instr_Alu32R( Xalu_MOV, |
| //.. X86RMI_Mem(espHI), tHi )); |
| //.. add_to_esp(env, 16); |
| //.. *rHi = tHi; |
| //.. *rLo = tLo; |
| //.. return; |
| //.. } |
| //.. |
| //.. /* could do better than this, but for now ... */ |
| //.. case Iop_1Sto64: { |
| //.. HReg tLo = newVRegI(env); |
| //.. HReg tHi = newVRegI(env); |
| //.. X86CondCode cond = iselCondCode(env, e->Iex.Unop.arg); |
| //.. addInstr(env, X86Instr_Set32(cond,tLo)); |
| //.. addInstr(env, X86Instr_Sh32(Xsh_SHL, 31, X86RM_Reg(tLo))); |
| //.. addInstr(env, X86Instr_Sh32(Xsh_SAR, 31, X86RM_Reg(tLo))); |
| //.. addInstr(env, mk_iMOVsd_RR(tLo, tHi)); |
| //.. *rHi = tHi; |
| //.. *rLo = tLo; |
| //.. return; |
| //.. } |
| //.. |
| //.. /* Not64(e) */ |
| //.. case Iop_Not64: { |
| //.. HReg tLo = newVRegI(env); |
| //.. HReg tHi = newVRegI(env); |
| //.. HReg sHi, sLo; |
| //.. iselInt64Expr(&sHi, &sLo, env, e->Iex.Unop.arg); |
| //.. addInstr(env, mk_iMOVsd_RR(sHi, tHi)); |
| //.. addInstr(env, mk_iMOVsd_RR(sLo, tLo)); |
| //.. addInstr(env, X86Instr_Unary32(Xun_NOT,X86RM_Reg(tHi))); |
| //.. addInstr(env, X86Instr_Unary32(Xun_NOT,X86RM_Reg(tLo))); |
| //.. *rHi = tHi; |
| //.. *rLo = tLo; |
| //.. return; |
| //.. } |
| //.. |
| //.. /* ReinterpF64asI64(e) */ |
| //.. /* Given an IEEE754 double, produce an I64 with the same bit |
| //.. pattern. */ |
| //.. case Iop_ReinterpF64asI64: { |
| //.. HReg rf = iselDblExpr(env, e->Iex.Unop.arg); |
| //.. HReg tLo = newVRegI(env); |
| //.. HReg tHi = newVRegI(env); |
| //.. X86AMode* zero_esp = X86AMode_IR(0, hregX86_ESP()); |
| //.. X86AMode* four_esp = X86AMode_IR(4, hregX86_ESP()); |
| //.. /* paranoia */ |
| //.. set_FPU_rounding_default(env); |
| //.. /* subl $8, %esp */ |
| //.. sub_from_esp(env, 8); |
| //.. /* gstD %rf, 0(%esp) */ |
| //.. addInstr(env, |
| //.. X86Instr_FpLdSt(False/*store*/, 8, rf, zero_esp)); |
| //.. /* movl 0(%esp), %tLo */ |
| //.. addInstr(env, |
| //.. X86Instr_Alu32R(Xalu_MOV, X86RMI_Mem(zero_esp), tLo)); |
| //.. /* movl 4(%esp), %tHi */ |
| //.. addInstr(env, |
| //.. X86Instr_Alu32R(Xalu_MOV, X86RMI_Mem(four_esp), tHi)); |
| //.. /* addl $8, %esp */ |
| //.. add_to_esp(env, 8); |
| //.. *rHi = tHi; |
| //.. *rLo = tLo; |
| //.. return; |
| //.. } |
| //.. |
| //.. case Iop_CmpNEZ32x2: |
| //.. fn = (HWord)h_generic_calc_CmpNEZ32x2; goto unish; |
| //.. case Iop_CmpNEZ16x4: |
| //.. fn = (HWord)h_generic_calc_CmpNEZ16x4; goto unish; |
| //.. case Iop_CmpNEZ8x8: |
| //.. fn = (HWord)h_generic_calc_CmpNEZ8x8; goto unish; |
| //.. unish: { |
| //.. /* Note: the following assumes all helpers are of |
| //.. signature |
| //.. ULong fn ( ULong ), and they are |
| //.. not marked as regparm functions. |
| //.. */ |
| //.. HReg xLo, xHi; |
| //.. HReg tLo = newVRegI(env); |
| //.. HReg tHi = newVRegI(env); |
| //.. iselInt64Expr(&xHi, &xLo, env, e->Iex.Unop.arg); |
| //.. addInstr(env, X86Instr_Push(X86RMI_Reg(xHi))); |
| //.. addInstr(env, X86Instr_Push(X86RMI_Reg(xLo))); |
| //.. addInstr(env, X86Instr_Call( Xcc_ALWAYS, (UInt)fn, 0 )); |
| //.. add_to_esp(env, 2*4); |
| //.. addInstr(env, mk_iMOVsd_RR(hregX86_EDX(), tHi)); |
| //.. addInstr(env, mk_iMOVsd_RR(hregX86_EAX(), tLo)); |
| //.. *rHi = tHi; |
| //.. *rLo = tLo; |
| //.. return; |
| //.. } |
| //.. |
| //.. default: |
| //.. break; |
| //.. } |
| //.. } /* if (e->tag == Iex_Unop) */ |
| //.. |
| //.. |
| //.. /* --------- CCALL --------- */ |
| //.. if (e->tag == Iex_CCall) { |
| //.. HReg tLo = newVRegI(env); |
| //.. HReg tHi = newVRegI(env); |
| //.. |
| //.. /* Marshal args, do the call, clear stack. */ |
| //.. doHelperCall( env, False, NULL, e->Iex.CCall.cee, e->Iex.CCall.args ); |
| //.. |
| //.. addInstr(env, mk_iMOVsd_RR(hregX86_EDX(), tHi)); |
| //.. addInstr(env, mk_iMOVsd_RR(hregX86_EAX(), tLo)); |
| //.. *rHi = tHi; |
| //.. *rLo = tLo; |
| //.. return; |
| //.. } |
| |
| ppIRExpr(e); |
| vpanic("iselInt128Expr"); |
| } |
| |
| |
| //.. /*---------------------------------------------------------*/ |
| //.. /*--- ISEL: Floating point expressions (32 bit) ---*/ |
| //.. /*---------------------------------------------------------*/ |
| //.. |
| //.. /* Nothing interesting here; really just wrappers for |
| //.. 64-bit stuff. */ |
| //.. |
| //.. static HReg iselFltExpr ( ISelEnv* env, IRExpr* e ) |
| //.. { |
| //.. HReg r = iselFltExpr_wrk( env, e ); |
| //.. # if 0 |
| //.. vex_printf("\n"); ppIRExpr(e); vex_printf("\n"); |
| //.. # endif |
| //.. vassert(hregClass(r) == HRcFlt64); /* yes, really Flt64 */ |
| //.. vassert(hregIsVirtual(r)); |
| //.. return r; |
| //.. } |
| //.. |
| //.. /* DO NOT CALL THIS DIRECTLY */ |
| //.. static HReg iselFltExpr_wrk ( ISelEnv* env, IRExpr* e ) |
| //.. { |
| //.. IRType ty = typeOfIRExpr(env->type_env,e); |
| //.. vassert(ty == Ity_F32); |
| //.. |
| //.. if (e->tag == Iex_Tmp) { |
| //.. return lookupIRTemp(env, e->Iex.Tmp.tmp); |
| //.. } |
| //.. |
| //.. if (e->tag == Iex_LDle) { |
| //.. X86AMode* am; |
| //.. HReg res = newVRegF(env); |
| //.. vassert(e->Iex.LDle.ty == Ity_F32); |
| //.. am = iselIntExpr_AMode(env, e->Iex.LDle.addr); |
| //.. addInstr(env, X86Instr_FpLdSt(True/*load*/, 4, res, am)); |
| //.. return res; |
| //.. } |
| //.. |
| //.. if (e->tag == Iex_Binop |
| //.. && e->Iex.Binop.op == Iop_F64toF32) { |
| //.. /* Although the result is still held in a standard FPU register, |
| //.. we need to round it to reflect the loss of accuracy/range |
| //.. entailed in casting it to a 32-bit float. */ |
| //.. HReg dst = newVRegF(env); |
| //.. HReg src = iselDblExpr(env, e->Iex.Binop.arg2); |
| //.. set_FPU_rounding_mode( env, e->Iex.Binop.arg1 ); |
| //.. addInstr(env, X86Instr_Fp64to32(src,dst)); |
| //.. set_FPU_rounding_default( env ); |
| //.. return dst; |
| //.. } |
| //.. |
| //.. if (e->tag == Iex_Get) { |
| //.. X86AMode* am = X86AMode_IR( e->Iex.Get.offset, |
| //.. hregX86_EBP() ); |
| //.. HReg res = newVRegF(env); |
| //.. addInstr(env, X86Instr_FpLdSt( True/*load*/, 4, res, am )); |
| //.. return res; |
| //.. } |
| //.. |
| //.. if (e->tag == Iex_Unop |
| //.. && e->Iex.Unop.op == Iop_ReinterpI32asF32) { |
| //.. /* Given an I32, produce an IEEE754 float with the same bit |
| //.. pattern. */ |
| //.. HReg dst = newVRegF(env); |
| //.. X86RMI* rmi = iselIntExpr_RMI(env, e->Iex.Unop.arg); |
| //.. /* paranoia */ |
| //.. addInstr(env, X86Instr_Push(rmi)); |
| //.. addInstr(env, X86Instr_FpLdSt( |
| //.. True/*load*/, 4, dst, |
| //.. X86AMode_IR(0, hregX86_ESP()))); |
| //.. add_to_esp(env, 4); |
| //.. return dst; |
| //.. } |
| //.. |
| //.. ppIRExpr(e); |
| //.. vpanic("iselFltExpr_wrk"); |
| //.. } |
| //.. |
| //.. |
| //.. /*---------------------------------------------------------*/ |
| //.. /*--- ISEL: Floating point expressions (64 bit) ---*/ |
| //.. /*---------------------------------------------------------*/ |
| //.. |
| //.. /* Compute a 64-bit floating point value into a register, the identity |
| //.. of which is returned. As with iselIntExpr_R, the reg may be either |
| //.. real or virtual; in any case it must not be changed by subsequent |
| //.. code emitted by the caller. */ |
| //.. |
| //.. /* IEEE 754 formats. From http://www.freesoft.org/CIE/RFC/1832/32.htm: |
| //.. |
| //.. Type S (1 bit) E (11 bits) F (52 bits) |
| //.. ---- --------- ----------- ----------- |
| //.. signalling NaN u 2047 (max) .0uuuuu---u |
| //.. (with at least |
| //.. one 1 bit) |
| //.. quiet NaN u 2047 (max) .1uuuuu---u |
| //.. |
| //.. negative infinity 1 2047 (max) .000000---0 |
| //.. |
| //.. positive infinity 0 2047 (max) .000000---0 |
| //.. |
| //.. negative zero 1 0 .000000---0 |
| //.. |
| //.. positive zero 0 0 .000000---0 |
| //.. */ |
| //.. |
| //.. static HReg iselDblExpr ( ISelEnv* env, IRExpr* e ) |
| //.. { |
| //.. HReg r = iselDblExpr_wrk( env, e ); |
| //.. # if 0 |
| //.. vex_printf("\n"); ppIRExpr(e); vex_printf("\n"); |
| //.. # endif |
| //.. vassert(hregClass(r) == HRcFlt64); |
| //.. vassert(hregIsVirtual(r)); |
| //.. return r; |
| //.. } |
| //.. |
| //.. /* DO NOT CALL THIS DIRECTLY */ |
| //.. static HReg iselDblExpr_wrk ( ISelEnv* env, IRExpr* e ) |
| //.. { |
| //.. IRType ty = typeOfIRExpr(env->type_env,e); |
| //.. vassert(e); |
| //.. vassert(ty == Ity_F64); |
| //.. |
| //.. if (e->tag == Iex_Tmp) { |
| //.. return lookupIRTemp(env, e->Iex.Tmp.tmp); |
| //.. } |
| //.. |
| //.. if (e->tag == Iex_Const) { |
| //.. union { UInt u32x2[2]; ULong u64; Double f64; } u; |
| //.. HReg freg = newVRegF(env); |
| //.. vassert(sizeof(u) == 8); |
| //.. vassert(sizeof(u.u64) == 8); |
| //.. vassert(sizeof(u.f64) == 8); |
| //.. vassert(sizeof(u.u32x2) == 8); |
| //.. |
| //.. if (e->Iex.Const.con->tag == Ico_F64) { |
| //.. u.f64 = e->Iex.Const.con->Ico.F64; |
| //.. } |
| //.. else if (e->Iex.Const.con->tag == Ico_F64i) { |
| //.. u.u64 = e->Iex.Const.con->Ico.F64i; |
| //.. } |
| //.. else |
| //.. vpanic("iselDblExpr(x86): const"); |
| //.. |
| //.. addInstr(env, X86Instr_Push(X86RMI_Imm(u.u32x2[1]))); |
| //.. addInstr(env, X86Instr_Push(X86RMI_Imm(u.u32x2[0]))); |
| //.. addInstr(env, X86Instr_FpLdSt(True/*load*/, 8, freg, |
| //.. X86AMode_IR(0, hregX86_ESP()))); |
| //.. add_to_esp(env, 8); |
| //.. return freg; |
| //.. } |
| //.. |
| //.. if (e->tag == Iex_LDle) { |
| //.. X86AMode* am; |
| //.. HReg res = newVRegF(env); |
| //.. vassert(e->Iex.LDle.ty == Ity_F64); |
| //.. am = iselIntExpr_AMode(env, e->Iex.LDle.addr); |
| //.. addInstr(env, X86Instr_FpLdSt(True/*load*/, 8, res, am)); |
| //.. return res; |
| //.. } |
| //.. |
| //.. if (e->tag == Iex_Get) { |
| //.. X86AMode* am = X86AMode_IR( e->Iex.Get.offset, |
| //.. hregX86_EBP() ); |
| //.. HReg res = newVRegF(env); |
| //.. addInstr(env, X86Instr_FpLdSt( True/*load*/, 8, res, am )); |
| //.. return res; |
| //.. } |
| //.. |
| //.. if (e->tag == Iex_GetI) { |
| //.. X86AMode* am |
| //.. = genGuestArrayOffset( |
| //.. env, e->Iex.GetI.descr, |
| //.. e->Iex.GetI.ix, e->Iex.GetI.bias ); |
| //.. HReg res = newVRegF(env); |
| //.. addInstr(env, X86Instr_FpLdSt( True/*load*/, 8, res, am )); |
| //.. return res; |
| //.. } |
| //.. |
| //.. if (e->tag == Iex_Binop) { |
| //.. X86FpOp fpop = Xfp_INVALID; |
| //.. switch (e->Iex.Binop.op) { |
| //.. case Iop_AddF64: fpop = Xfp_ADD; break; |
| //.. case Iop_SubF64: fpop = Xfp_SUB; break; |
| //.. case Iop_MulF64: fpop = Xfp_MUL; break; |
| //.. case Iop_DivF64: fpop = Xfp_DIV; break; |
| //.. case Iop_ScaleF64: fpop = Xfp_SCALE; break; |
| //.. case Iop_AtanF64: fpop = Xfp_ATAN; break; |
| //.. case Iop_Yl2xF64: fpop = Xfp_YL2X; break; |
| //.. case Iop_Yl2xp1F64: fpop = Xfp_YL2XP1; break; |
| //.. case Iop_PRemF64: fpop = Xfp_PREM; break; |
| //.. case Iop_PRem1F64: fpop = Xfp_PREM1; break; |
| //.. default: break; |
| //.. } |
| //.. if (fpop != Xfp_INVALID) { |
| //.. HReg res = newVRegF(env); |
| //.. HReg srcL = iselDblExpr(env, e->Iex.Binop.arg1); |
| //.. HReg srcR = iselDblExpr(env, e->Iex.Binop.arg2); |
| //.. addInstr(env, X86Instr_FpBinary(fpop,srcL,srcR,res)); |
| //.. if (fpop != Xfp_ADD && fpop != Xfp_SUB |
| //.. && fpop != Xfp_MUL && fpop != Xfp_DIV) |
| //.. roundToF64(env, res); |
| //.. return res; |
| //.. } |
| //.. } |
| //.. |
| //.. if (e->tag == Iex_Binop && e->Iex.Binop.op == Iop_RoundF64) { |
| //.. HReg rf = iselDblExpr(env, e->Iex.Binop.arg2); |
| //.. HReg dst = newVRegF(env); |
| //.. |
| //.. /* rf now holds the value to be rounded. The first thing to do |
| //.. is set the FPU's rounding mode accordingly. */ |
| //.. |
| //.. /* Set host rounding mode */ |
| //.. set_FPU_rounding_mode( env, e->Iex.Binop.arg1 ); |
| //.. |
| //.. /* grndint %rf, %dst */ |
| //.. addInstr(env, X86Instr_FpUnary(Xfp_ROUND, rf, dst)); |
| //.. |
| //.. /* Restore default FPU rounding. */ |
| //.. set_FPU_rounding_default( env ); |
| //.. |
| //.. return dst; |
| //.. } |
| //.. |
| //.. if (e->tag == Iex_Binop && e->Iex.Binop.op == Iop_I64toF64) { |
| //.. HReg dst = newVRegF(env); |
| //.. HReg rHi,rLo; |
| //.. iselInt64Expr( &rHi, &rLo, env, e->Iex.Binop.arg2); |
| //.. addInstr(env, X86Instr_Push(X86RMI_Reg(rHi))); |
| //.. addInstr(env, X86Instr_Push(X86RMI_Reg(rLo))); |
| //.. |
| //.. /* Set host rounding mode */ |
| //.. set_FPU_rounding_mode( env, e->Iex.Binop.arg1 ); |
| //.. |
| //.. addInstr(env, X86Instr_FpLdStI( |
| //.. True/*load*/, 8, dst, |
| //.. X86AMode_IR(0, hregX86_ESP()))); |
| //.. |
| //.. /* Restore default FPU rounding. */ |
| //.. set_FPU_rounding_default( env ); |
| //.. |
| //.. add_to_esp(env, 8); |
| //.. return dst; |
| //.. } |
| //.. |
| //.. if (e->tag == Iex_Unop) { |
| //.. X86FpOp fpop = Xfp_INVALID; |
| //.. switch (e->Iex.Unop.op) { |
| //.. case Iop_NegF64: fpop = Xfp_NEG; break; |
| //.. case Iop_AbsF64: fpop = Xfp_ABS; break; |
| //.. case Iop_SqrtF64: fpop = Xfp_SQRT; break; |
| //.. case Iop_SinF64: fpop = Xfp_SIN; break; |
| //.. case Iop_CosF64: fpop = Xfp_COS; break; |
| //.. case Iop_TanF64: fpop = Xfp_TAN; break; |
| //.. case Iop_2xm1F64: fpop = Xfp_2XM1; break; |
| //.. default: break; |
| //.. } |
| //.. if (fpop != Xfp_INVALID) { |
| //.. HReg res = newVRegF(env); |
| //.. HReg src = iselDblExpr(env, e->Iex.Unop.arg); |
| //.. addInstr(env, X86Instr_FpUnary(fpop,src,res)); |
| //.. if (fpop != Xfp_SQRT |
| //.. && fpop != Xfp_NEG && fpop != Xfp_ABS) |
| //.. roundToF64(env, res); |
| //.. return res; |
| //.. } |
| //.. } |
| //.. |
| //.. if (e->tag == Iex_Unop) { |
| //.. switch (e->Iex.Unop.op) { |
| //.. case Iop_I32toF64: { |
| //.. HReg dst = newVRegF(env); |
| //.. HReg ri = iselIntExpr_R(env, e->Iex.Unop.arg); |
| //.. addInstr(env, X86Instr_Push(X86RMI_Reg(ri))); |
| //.. set_FPU_rounding_default(env); |
| //.. addInstr(env, X86Instr_FpLdStI( |
| //.. True/*load*/, 4, dst, |
| //.. X86AMode_IR(0, hregX86_ESP()))); |
| //.. add_to_esp(env, 4); |
| //.. return dst; |
| //.. } |
| //.. case Iop_ReinterpI64asF64: { |
| //.. /* Given an I64, produce an IEEE754 double with the same |
| //.. bit pattern. */ |
| //.. HReg dst = newVRegF(env); |
| //.. HReg rHi, rLo; |
| //.. iselInt64Expr( &rHi, &rLo, env, e->Iex.Unop.arg); |
| //.. /* paranoia */ |
| //.. set_FPU_rounding_default(env); |
| //.. addInstr(env, X86Instr_Push(X86RMI_Reg(rHi))); |
| //.. addInstr(env, X86Instr_Push(X86RMI_Reg(rLo))); |
| //.. addInstr(env, X86Instr_FpLdSt( |
| //.. True/*load*/, 8, dst, |
| //.. X86AMode_IR(0, hregX86_ESP()))); |
| //.. add_to_esp(env, 8); |
| //.. return dst; |
| //.. } |
| //.. case Iop_F32toF64: { |
| //.. /* this is a no-op */ |
| //.. HReg res = iselFltExpr(env, e->Iex.Unop.arg); |
| //.. return res; |
| //.. } |
| //.. default: |
| //.. break; |
| //.. } |
| //.. } |
| //.. |
| //.. /* --------- MULTIPLEX --------- */ |
| //.. if (e->tag == Iex_Mux0X) { |
| //.. if (ty == Ity_F64 |
| //.. && typeOfIRExpr(env->type_env,e->Iex.Mux0X.cond) == Ity_I8) { |
| //.. HReg r8 = iselIntExpr_R(env, e->Iex.Mux0X.cond); |
| //.. HReg rX = iselDblExpr(env, e->Iex.Mux0X.exprX); |
| //.. HReg r0 = iselDblExpr(env, e->Iex.Mux0X.expr0); |
| //.. HReg dst = newVRegF(env); |
| //.. addInstr(env, X86Instr_FpUnary(Xfp_MOV,rX,dst)); |
| //.. addInstr(env, X86Instr_Test32(X86RI_Imm(0xFF), X86RM_Reg(r8))); |
| //.. addInstr(env, X86Instr_FpCMov(Xcc_Z,r0,dst)); |
| //.. return dst; |
| //.. } |
| //.. } |
| //.. |
| //.. ppIRExpr(e); |
| //.. vpanic("iselDblExpr_wrk"); |
| //.. } |
| //.. |
| //.. |
| //.. /*---------------------------------------------------------*/ |
| //.. /*--- ISEL: SIMD (Vector) expressions, 128 bit. ---*/ |
| //.. /*---------------------------------------------------------*/ |
| //.. |
| //.. static HReg iselVecExpr ( ISelEnv* env, IRExpr* e ) |
| //.. { |
| //.. HReg r = iselVecExpr_wrk( env, e ); |
| //.. # if 0 |
| //.. vex_printf("\n"); ppIRExpr(e); vex_printf("\n"); |
| //.. # endif |
| //.. vassert(hregClass(r) == HRcVec128); |
| //.. vassert(hregIsVirtual(r)); |
| //.. return r; |
| //.. } |
| //.. |
| //.. |
| //.. /* DO NOT CALL THIS DIRECTLY */ |
| //.. static HReg iselVecExpr_wrk ( ISelEnv* env, IRExpr* e ) |
| //.. { |
| #if 0 |
| # define REQUIRE_SSE1 \ |
| do { if (env->subarch == VexSubArchX86_sse0) \ |
| goto vec_fail; \ |
| } while (0) |
| |
| # define REQUIRE_SSE2 \ |
| do { if (env->subarch == VexSubArchX86_sse0 \ |
| || env->subarch == VexSubArchX86_sse1) \ |
| goto vec_fail; \ |
| } while (0) |
| #endif |
| //.. Bool arg1isEReg = False; |
| //.. X86SseOp op = Xsse_INVALID; |
| //.. IRType ty = typeOfIRExpr(env->type_env,e); |
| //.. vassert(e); |
| //.. vassert(ty == Ity_V128); |
| //.. |
| //.. REQUIRE_SSE1; |
| //.. |
| //.. if (e->tag == Iex_Tmp) { |
| //.. return lookupIRTemp(env, e->Iex.Tmp.tmp); |
| //.. } |
| //.. |
| //.. if (e->tag == Iex_Get) { |
| //.. HReg dst = newVRegV(env); |
| //.. addInstr(env, X86Instr_SseLdSt( |
| //.. True/*load*/, |
| //.. dst, |
| //.. X86AMode_IR(e->Iex.Get.offset, hregX86_EBP()) |
| //.. ) |
| //.. ); |
| //.. return dst; |
| //.. } |
| //.. |
| //.. if (e->tag == Iex_LDle) { |
| //.. HReg dst = newVRegV(env); |
| //.. X86AMode* am = iselIntExpr_AMode(env, e->Iex.LDle.addr); |
| //.. addInstr(env, X86Instr_SseLdSt( True/*load*/, dst, am )); |
| //.. return dst; |
| //.. } |
| //.. |
| //.. if (e->tag == Iex_Const) { |
| //.. HReg dst = newVRegV(env); |
| //.. vassert(e->Iex.Const.con->tag == Ico_V128); |
| //.. addInstr(env, X86Instr_SseConst(e->Iex.Const.con->Ico.V128, dst)); |
| //.. return dst; |
| //.. } |
| //.. |
| //.. if (e->tag == Iex_Unop) { |
| //.. switch (e->Iex.Unop.op) { |
| //.. |
| //.. case Iop_Not128: { |
| //.. HReg arg = iselVecExpr(env, e->Iex.Unop.arg); |
| //.. return do_sse_Not128(env, arg); |
| //.. } |
| //.. |
| //.. case Iop_CmpNEZ64x2: { |
| //.. /* We can use SSE2 instructions for this. */ |
| //.. /* Ideally, we want to do a 64Ix2 comparison against zero of |
| //.. the operand. Problem is no such insn exists. Solution |
| //.. therefore is to do a 32Ix4 comparison instead, and bitwise- |
| //.. negate (NOT) the result. Let a,b,c,d be 32-bit lanes, and |
| //.. let the not'd result of this initial comparison be a:b:c:d. |
| //.. What we need to compute is (a|b):(a|b):(c|d):(c|d). So, use |
| //.. pshufd to create a value b:a:d:c, and OR that with a:b:c:d, |
| //.. giving the required result. |
| //.. |
| //.. The required selection sequence is 2,3,0,1, which |
| //.. according to Intel's documentation means the pshufd |
| //.. literal value is 0xB1, that is, |
| //.. (2 << 6) | (3 << 4) | (0 << 2) | (1 << 0) |
| //.. */ |
| //.. HReg arg = iselVecExpr(env, e->Iex.Unop.arg); |
| //.. HReg tmp = newVRegV(env); |
| //.. HReg dst = newVRegV(env); |
| //.. REQUIRE_SSE2; |
| //.. addInstr(env, X86Instr_SseReRg(Xsse_XOR, tmp, tmp)); |
| //.. addInstr(env, X86Instr_SseReRg(Xsse_CMPEQ32, arg, tmp)); |
| //.. tmp = do_sse_Not128(env, tmp); |
| //.. addInstr(env, X86Instr_SseShuf(0xB1, tmp, dst)); |
| //.. addInstr(env, X86Instr_SseReRg(Xsse_OR, tmp, dst)); |
| //.. return dst; |
| //.. } |
| //.. |
| //.. case Iop_CmpNEZ32x4: { |
| //.. /* Sigh, we have to generate lousy code since this has to |
| //.. work on SSE1 hosts */ |
| //.. /* basically, the idea is: for each lane: |
| //.. movl lane, %r ; negl %r (now CF = lane==0 ? 0 : 1) |
| //.. sbbl %r, %r (now %r = 1Sto32(CF)) |
| //.. movl %r, lane |
| //.. */ |
| //.. Int i; |
| //.. X86AMode* am; |
| //.. X86AMode* esp0 = X86AMode_IR(0, hregX86_ESP()); |
| //.. HReg arg = iselVecExpr(env, e->Iex.Unop.arg); |
| //.. HReg dst = newVRegV(env); |
| //.. HReg r32 = newVRegI(env); |
| //.. sub_from_esp(env, 16); |
| //.. addInstr(env, X86Instr_SseLdSt(False/*store*/, arg, esp0)); |
| //.. for (i = 0; i < 4; i++) { |
| //.. am = X86AMode_IR(i*4, hregX86_ESP()); |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_MOV, X86RMI_Mem(am), r32)); |
| //.. addInstr(env, X86Instr_Unary32(Xun_NEG, X86RM_Reg(r32))); |
| //.. addInstr(env, X86Instr_Alu32R(Xalu_SBB, X86RMI_Reg(r32), r32)); |
| //.. addInstr(env, X86Instr_Alu32M(Xalu_MOV, X86RI_Reg(r32), am)); |
| //.. } |
| //.. addInstr(env, X86Instr_SseLdSt(True/*load*/, dst, esp0)); |
| //.. add_to_esp(env, 16); |
| //.. return dst; |
| //.. } |
| //.. |
| //.. case Iop_CmpNEZ8x16: |
| //.. case Iop_CmpNEZ16x8: { |
| //.. /* We can use SSE2 instructions for this. */ |
| //.. HReg arg; |
| //.. HReg vec0 = newVRegV(env); |
| //.. HReg vec1 = newVRegV(env); |
| //.. HReg dst = newVRegV(env); |
| //.. X86SseOp cmpOp |
| //.. = e->Iex.Unop.op==Iop_CmpNEZ16x8 ? Xsse_CMPEQ16 |
| //.. : Xsse_CMPEQ8; |
| //.. REQUIRE_SSE2; |
| //.. addInstr(env, X86Instr_SseReRg(Xsse_XOR, vec0, vec0)); |
| //.. addInstr(env, mk_vMOVsd_RR(vec0, vec1)); |
| //.. addInstr(env, X86Instr_Sse32Fx4(Xsse_CMPEQF, vec1, vec1)); |
| //.. /* defer arg computation to here so as to give CMPEQF as long |
| //.. as possible to complete */ |
| //.. arg = iselVecExpr(env, e->Iex.Unop.arg); |
| //.. /* vec0 is all 0s; vec1 is all 1s */ |
| //.. addInstr(env, mk_vMOVsd_RR(arg, dst)); |
| //.. /* 16x8 or 8x16 comparison == */ |
| //.. addInstr(env, X86Instr_SseReRg(cmpOp, vec0, dst)); |
| //.. /* invert result */ |
| //.. addInstr(env, X86Instr_SseReRg(Xsse_XOR, vec1, dst)); |
| //.. return dst; |
| //.. } |
| //.. |
| //.. case Iop_Recip32Fx4: op = Xsse_RCPF; goto do_32Fx4_unary; |
| //.. case Iop_RSqrt32Fx4: op = Xsse_RSQRTF; goto do_32Fx4_unary; |
| //.. case Iop_Sqrt32Fx4: op = Xsse_SQRTF; goto do_32Fx4_unary; |
| //.. do_32Fx4_unary: |
| //.. { |
| //.. HReg arg = iselVecExpr(env, e->Iex.Unop.arg); |
| //.. HReg dst = newVRegV(env); |
| //.. addInstr(env, X86Instr_Sse32Fx4(op, arg, dst)); |
| //.. return dst; |
| //.. } |
| //.. |
| //.. case Iop_Recip64Fx2: op = Xsse_RCPF; goto do_64Fx2_unary; |
| //.. case Iop_RSqrt64Fx2: op = Xsse_RSQRTF; goto do_64Fx2_unary; |
| //.. case Iop_Sqrt64Fx2: op = Xsse_SQRTF; goto do_64Fx2_unary; |
| //.. do_64Fx2_unary: |
| //.. { |
| //.. HReg arg = iselVecExpr(env, e->Iex.Unop.arg); |
| //.. HReg dst = newVRegV(env); |
| //.. REQUIRE_SSE2; |
| //.. addInstr(env, X86Instr_Sse64Fx2(op, arg, dst)); |
| //.. return dst; |
| //.. } |
| //.. |
| //.. case Iop_Recip32F0x4: op = Xsse_RCPF; goto do_32F0x4_unary; |
| //.. case Iop_RSqrt32F0x4: op = Xsse_RSQRTF; goto do_32F0x4_unary; |
| //.. case Iop_Sqrt32F0x4: op = Xsse_SQRTF; goto do_32F0x4_unary; |
| //.. do_32F0x4_unary: |
| //.. { |
| //.. /* A bit subtle. We have to copy the arg to the result |
| //.. register first, because actually doing the SSE scalar insn |
| //.. leaves the upper 3/4 of the destination register |
| //.. unchanged. Whereas the required semantics of these |
| //.. primops is that the upper 3/4 is simply copied in from the |
| //.. argument. */ |
| //.. HReg arg = iselVecExpr(env, e->Iex.Unop.arg); |
| //.. HReg dst = newVRegV(env); |
| //.. addInstr(env, mk_vMOVsd_RR(arg, dst)); |
| //.. addInstr(env, X86Instr_Sse32FLo(op, arg, dst)); |
| //.. return dst; |
| //.. } |
| //.. |
| //.. case Iop_Recip64F0x2: op = Xsse_RCPF; goto do_64F0x2_unary; |
| //.. case Iop_RSqrt64F0x2: op = Xsse_RSQRTF; goto do_64F0x2_unary; |
| //.. case Iop_Sqrt64F0x2: op = Xsse_SQRTF; goto do_64F0x2_unary; |
| //.. do_64F0x2_unary: |
| //.. { |
| //.. /* A bit subtle. We have to copy the arg to the result |
| //.. register first, because actually doing the SSE scalar insn |
| //.. leaves the upper half of the destination register |
| //.. unchanged. Whereas the required semantics of these |
| //.. primops is that the upper half is simply copied in from the |
| //.. argument. */ |
| //.. HReg arg = iselVecExpr(env, e->Iex.Unop.arg); |
| //.. HReg dst = newVRegV(env); |
| //.. REQUIRE_SSE2; |
| //.. addInstr(env, mk_vMOVsd_RR(arg, dst)); |
| //.. addInstr(env, X86Instr_Sse64FLo(op, arg, dst)); |
| //.. return dst; |
| //.. } |
| //.. |
| //.. case Iop_32Uto128: { |
| //.. HReg dst = newVRegV(env); |
| //.. X86AMode* esp0 = X86AMode_IR(0, hregX86_ESP()); |
| //.. X86RMI* rmi = iselIntExpr_RMI(env, e->Iex.Unop.arg); |
| //.. addInstr(env, X86Instr_Push(rmi)); |
| //.. addInstr(env, X86Instr_SseLdzLO(4, dst, esp0)); |
| //.. add_to_esp(env, 4); |
| //.. return dst; |
| //.. } |
| //.. |
| //.. case Iop_64Uto128: { |
| //.. HReg rHi, rLo; |
| //.. HReg dst = newVRegV(env); |
| //.. X86AMode* esp0 = X86AMode_IR(0, hregX86_ESP()); |
| //.. iselInt64Expr(&rHi, &rLo, env, e->Iex.Unop.arg); |
| //.. addInstr(env, X86Instr_Push(X86RMI_Reg(rHi))); |
| //.. addInstr(env, X86Instr_Push(X86RMI_Reg(rLo))); |
| //.. addInstr(env, X86Instr_SseLdzLO(8, dst, esp0)); |
| //.. add_to_esp(env, 8); |
| //.. return dst; |
| //.. } |
| //.. |
| //.. default: |
| //.. break; |
| //.. } /* switch (e->Iex.Unop.op) */ |
| //.. } /* if (e->tag == Iex_Unop) */ |
| //.. |
| //.. if (e->tag == Iex_Binop) { |
| //.. switch (e->Iex.Binop.op) { |
| //.. |
| //.. case Iop_Set128lo32: { |
| //.. HReg dst = newVRegV(env); |
| //.. HReg srcV = iselVecExpr(env, e->Iex.Binop.arg1); |
| //.. HReg srcI = iselIntExpr_R(env, e->Iex.Binop.arg2); |
| //.. X86AMode* esp0 = X86AMode_IR(0, hregX86_ESP()); |
| //.. sub_from_esp(env, 16); |
| //.. addInstr(env, X86Instr_SseLdSt(False/*store*/, srcV, esp0)); |
| //.. addInstr(env, X86Instr_Alu32M(Xalu_MOV, X86RI_Reg(srcI), esp0)); |
| //.. addInstr(env, X86Instr_SseLdSt(True/*load*/, dst, esp0)); |
| //.. add_to_esp(env, 16); |
| //.. return dst; |
| //.. } |
| //.. |
| //.. case Iop_Set128lo64: { |
| //.. HReg dst = newVRegV(env); |
| //.. HReg srcV = iselVecExpr(env, e->Iex.Binop.arg1); |
| //.. HReg srcIhi, srcIlo; |
| //.. X86AMode* esp0 = X86AMode_IR(0, hregX86_ESP()); |
| //.. X86AMode* esp4 = advance4(esp0); |
| //.. iselInt64Expr(&srcIhi, &srcIlo, env, e->Iex.Binop.arg2); |
| //.. sub_from_esp(env, 16); |
| //.. addInstr(env, X86Instr_SseLdSt(False/*store*/, srcV, esp0)); |
| //.. addInstr(env, X86Instr_Alu32M(Xalu_MOV, X86RI_Reg(srcIlo), esp0)); |
| //.. addInstr(env, X86Instr_Alu32M(Xalu_MOV, X86RI_Reg(srcIhi), esp4)); |
| //.. addInstr(env, X86Instr_SseLdSt(True/*load*/, dst, esp0)); |
| //.. add_to_esp(env, 16); |
| //.. return dst; |
| //.. } |
| //.. |
| //.. case Iop_64HLto128: { |
| //.. HReg r3, r2, r1, r0; |
| //.. X86AMode* esp0 = X86AMode_IR(0, hregX86_ESP()); |
| //.. X86AMode* esp4 = advance4(esp0); |
| //.. X86AMode* esp8 = advance4(esp4); |
| //.. X86AMode* esp12 = advance4(esp8); |
| //.. HReg dst = newVRegV(env); |
| //.. /* do this via the stack (easy, convenient, etc) */ |
| //.. sub_from_esp(env, 16); |
| //.. /* Do the less significant 64 bits */ |
| //.. iselInt64Expr(&r1, &r0, env, e->Iex.Binop.arg2); |
| //.. addInstr(env, X86Instr_Alu32M(Xalu_MOV, X86RI_Reg(r0), esp0)); |
| //.. addInstr(env, X86Instr_Alu32M(Xalu_MOV, X86RI_Reg(r1), esp4)); |
| //.. /* Do the more significant 64 bits */ |
| //.. iselInt64Expr(&r3, &r2, env, e->Iex.Binop.arg1); |
| //.. addInstr(env, X86Instr_Alu32M(Xalu_MOV, X86RI_Reg(r2), esp8)); |
| //.. addInstr(env, X86Instr_Alu32M(Xalu_MOV, X86RI_Reg(r3), esp12)); |
| //.. /* Fetch result back from stack. */ |
| //.. addInstr(env, X86Instr_SseLdSt(True/*load*/, dst, esp0)); |
| //.. add_to_esp(env, 16); |
| //.. return dst; |
| //.. } |
| //.. |
| //.. case Iop_CmpEQ32Fx4: op = Xsse_CMPEQF; goto do_32Fx4; |
| //.. case Iop_CmpLT32Fx4: op = Xsse_CMPLTF; goto do_32Fx4; |
| //.. case Iop_CmpLE32Fx4: op = Xsse_CMPLEF; goto do_32Fx4; |
| //.. case Iop_Add32Fx4: op = Xsse_ADDF; goto do_32Fx4; |
| //.. case Iop_Div32Fx4: op = Xsse_DIVF; goto do_32Fx4; |
| //.. case Iop_Max32Fx4: op = Xsse_MAXF; goto do_32Fx4; |
| //.. case Iop_Min32Fx4: op = Xsse_MINF; goto do_32Fx4; |
| //.. case Iop_Mul32Fx4: op = Xsse_MULF; goto do_32Fx4; |
| //.. case Iop_Sub32Fx4: op = Xsse_SUBF; goto do_32Fx4; |
| //.. do_32Fx4: |
| //.. { |
| //.. HReg argL = iselVecExpr(env, e->Iex.Binop.arg1); |
| //.. HReg argR = iselVecExpr(env, e->Iex.Binop.arg2); |
| //.. HReg dst = newVRegV(env); |
| //.. addInstr(env, mk_vMOVsd_RR(argL, dst)); |
| //.. addInstr(env, X86Instr_Sse32Fx4(op, argR, dst)); |
| //.. return dst; |
| //.. } |
| //.. |
| //.. case Iop_CmpEQ64Fx2: op = Xsse_CMPEQF; goto do_64Fx2; |
| //.. case Iop_CmpLT64Fx2: op = Xsse_CMPLTF; goto do_64Fx2; |
| //.. case Iop_CmpLE64Fx2: op = Xsse_CMPLEF; goto do_64Fx2; |
| //.. case Iop_Add64Fx2: op = Xsse_ADDF; goto do_64Fx2; |
| //.. case Iop_Div64Fx2: op = Xsse_DIVF; goto do_64Fx2; |
| //.. case Iop_Max64Fx2: op = Xsse_MAXF; goto do_64Fx2; |
| //.. case Iop_Min64Fx2: op = Xsse_MINF; goto do_64Fx2; |
| //.. case Iop_Mul64Fx2: op = Xsse_MULF; goto do_64Fx2; |
| //.. case Iop_Sub64Fx2: op = Xsse_SUBF; goto do_64Fx2; |
| //.. do_64Fx2: |
| //.. { |
| //.. HReg argL = iselVecExpr(env, e->Iex.Binop.arg1); |
| //.. HReg argR = iselVecExpr(env, e->Iex.Binop.arg2); |
| //.. HReg dst = newVRegV(env); |
| //.. REQUIRE_SSE2; |
| //.. addInstr(env, mk_vMOVsd_RR(argL, dst)); |
| //.. addInstr(env, X86Instr_Sse64Fx2(op, argR, dst)); |
| //.. return dst; |
| //.. } |
| //.. |
| //.. case Iop_CmpEQ32F0x4: op = Xsse_CMPEQF; goto do_32F0x4; |
| //.. case Iop_CmpLT32F0x4: op = Xsse_CMPLTF; goto do_32F0x4; |
| //.. case Iop_CmpLE32F0x4: op = Xsse_CMPLEF; goto do_32F0x4; |
| //.. case Iop_Add32F0x4: op = Xsse_ADDF; goto do_32F0x4; |
| //.. case Iop_Div32F0x4: op = Xsse_DIVF; goto do_32F0x4; |
| //.. case Iop_Max32F0x4: op = Xsse_MAXF; goto do_32F0x4; |
| //.. case Iop_Min32F0x4: op = Xsse_MINF; goto do_32F0x4; |
| //.. case Iop_Mul32F0x4: op = Xsse_MULF; goto do_32F0x4; |
| //.. case Iop_Sub32F0x4: op = Xsse_SUBF; goto do_32F0x4; |
| //.. do_32F0x4: { |
| //.. HReg argL = iselVecExpr(env, e->Iex.Binop.arg1); |
| //.. HReg argR = iselVecExpr(env, e->Iex.Binop.arg2); |
| //.. HReg dst = newVRegV(env); |
| //.. addInstr(env, mk_vMOVsd_RR(argL, dst)); |
| //.. addInstr(env, X86Instr_Sse32FLo(op, argR, dst)); |
| //.. return dst; |
| //.. } |
| //.. |
| //.. case Iop_CmpEQ64F0x2: op = Xsse_CMPEQF; goto do_64F0x2; |
| //.. case Iop_CmpLT64F0x2: op = Xsse_CMPLTF; goto do_64F0x2; |
| //.. case Iop_CmpLE64F0x2: op = Xsse_CMPLEF; goto do_64F0x2; |
| //.. case Iop_Add64F0x2: op = Xsse_ADDF; goto do_64F0x2; |
| //.. case Iop_Div64F0x2: op = Xsse_DIVF; goto do_64F0x2; |
| //.. case Iop_Max64F0x2: op = Xsse_MAXF; goto do_64F0x2; |
| //.. case Iop_Min64F0x2: op = Xsse_MINF; goto do_64F0x2; |
| //.. case Iop_Mul64F0x2: op = Xsse_MULF; goto do_64F0x2; |
| //.. case Iop_Sub64F0x2: op = Xsse_SUBF; goto do_64F0x2; |
| //.. do_64F0x2: { |
| //.. HReg argL = iselVecExpr(env, e->Iex.Binop.arg1); |
| //.. HReg argR = iselVecExpr(env, e->Iex.Binop.arg2); |
| //.. HReg dst = newVRegV(env); |
| //.. REQUIRE_SSE2; |
| //.. addInstr(env, mk_vMOVsd_RR(argL, dst)); |
| //.. addInstr(env, X86Instr_Sse64FLo(op, argR, dst)); |
| //.. return dst; |
| //.. } |
| //.. |
| //.. case Iop_QNarrow32Sx4: |
| //.. op = Xsse_PACKSSD; arg1isEReg = True; goto do_SseReRg; |
| //.. case Iop_QNarrow16Sx8: |
| //.. op = Xsse_PACKSSW; arg1isEReg = True; goto do_SseReRg; |
| //.. case Iop_QNarrow16Ux8: |
| //.. op = Xsse_PACKUSW; arg1isEReg = True; goto do_SseReRg; |
| //.. |
| //.. case Iop_InterleaveHI8x16: |
| //.. op = Xsse_UNPCKHB; arg1isEReg = True; goto do_SseReRg; |
| //.. case Iop_InterleaveHI16x8: |
| //.. op = Xsse_UNPCKHW; arg1isEReg = True; goto do_SseReRg; |
| //.. case Iop_InterleaveHI32x4: |
| //.. op = Xsse_UNPCKHD; arg1isEReg = True; goto do_SseReRg; |
| //.. case Iop_InterleaveHI64x2: |
| //.. op = Xsse_UNPCKHQ; arg1isEReg = True; goto do_SseReRg; |
| //.. |
| //.. case Iop_InterleaveLO8x16: |
| //.. op = Xsse_UNPCKLB; arg1isEReg = True; goto do_SseReRg; |
| //.. case Iop_InterleaveLO16x8: |
| //.. op = Xsse_UNPCKLW; arg1isEReg = True; goto do_SseReRg; |
| //.. case Iop_InterleaveLO32x4: |
| //.. op = Xsse_UNPCKLD; arg1isEReg = True; goto do_SseReRg; |
| //.. case Iop_InterleaveLO64x2: |
| //.. op = Xsse_UNPCKLQ; arg1isEReg = True; goto do_SseReRg; |
| //.. |
| //.. case Iop_And128: op = Xsse_AND; goto do_SseReRg; |
| //.. case Iop_Or128: op = Xsse_OR; goto do_SseReRg; |
| //.. case Iop_Xor128: op = Xsse_XOR; goto do_SseReRg; |
| //.. case Iop_Add8x16: op = Xsse_ADD8; goto do_SseReRg; |
| //.. case Iop_Add16x8: op = Xsse_ADD16; goto do_SseReRg; |
| //.. case Iop_Add32x4: op = Xsse_ADD32; goto do_SseReRg; |
| //.. case Iop_Add64x2: op = Xsse_ADD64; goto do_SseReRg; |
| //.. case Iop_QAdd8Sx16: op = Xsse_QADD8S; goto do_SseReRg; |
| //.. case Iop_QAdd16Sx8: op = Xsse_QADD16S; goto do_SseReRg; |
| //.. case Iop_QAdd8Ux16: op = Xsse_QADD8U; goto do_SseReRg; |
| //.. case Iop_QAdd16Ux8: op = Xsse_QADD16U; goto do_SseReRg; |
| //.. case Iop_Avg8Ux16: op = Xsse_AVG8U; goto do_SseReRg; |
| //.. case Iop_Avg16Ux8: op = Xsse_AVG16U; goto do_SseReRg; |
| //.. case Iop_CmpEQ8x16: op = Xsse_CMPEQ8; goto do_SseReRg; |
| //.. case Iop_CmpEQ16x8: op = Xsse_CMPEQ16; goto do_SseReRg; |
| //.. case Iop_CmpEQ32x4: op = Xsse_CMPEQ32; goto do_SseReRg; |
| //.. case Iop_CmpGT8Sx16: op = Xsse_CMPGT8S; goto do_SseReRg; |
| //.. case Iop_CmpGT16Sx8: op = Xsse_CMPGT16S; goto do_SseReRg; |
| //.. case Iop_CmpGT32Sx4: op = Xsse_CMPGT32S; goto do_SseReRg; |
| //.. case Iop_Max16Sx8: op = Xsse_MAX16S; goto do_SseReRg; |
| //.. case Iop_Max8Ux16: op = Xsse_MAX8U; goto do_SseReRg; |
| //.. case Iop_Min16Sx8: op = Xsse_MIN16S; goto do_SseReRg; |
| //.. case Iop_Min8Ux16: op = Xsse_MIN8U; goto do_SseReRg; |
| //.. case Iop_MulHi16Ux8: op = Xsse_MULHI16U; goto do_SseReRg; |
| //.. case Iop_MulHi16Sx8: op = Xsse_MULHI16S; goto do_SseReRg; |
| //.. case Iop_Mul16x8: op = Xsse_MUL16; goto do_SseReRg; |
| //.. case Iop_Sub8x16: op = Xsse_SUB8; goto do_SseReRg; |
| //.. case Iop_Sub16x8: op = Xsse_SUB16; goto do_SseReRg; |
| //.. case Iop_Sub32x4: op = Xsse_SUB32; goto do_SseReRg; |
| //.. case Iop_Sub64x2: op = Xsse_SUB64; goto do_SseReRg; |
| //.. case Iop_QSub8Sx16: op = Xsse_QSUB8S; goto do_SseReRg; |
| //.. case Iop_QSub16Sx8: op = Xsse_QSUB16S; goto do_SseReRg; |
| //.. case Iop_QSub8Ux16: op = Xsse_QSUB8U; goto do_SseReRg; |
| //.. case Iop_QSub16Ux8: op = Xsse_QSUB16U; goto do_SseReRg; |
| //.. do_SseReRg: { |
| //.. HReg arg1 = iselVecExpr(env, e->Iex.Binop.arg1); |
| //.. HReg arg2 = iselVecExpr(env, e->Iex.Binop.arg2); |
| //.. HReg dst = newVRegV(env); |
| //.. if (op != Xsse_OR && op != Xsse_AND && op != Xsse_XOR) |
| //.. REQUIRE_SSE2; |
| //.. if (arg1isEReg) { |
| //.. addInstr(env, mk_vMOVsd_RR(arg2, dst)); |
| //.. addInstr(env, X86Instr_SseReRg(op, arg1, dst)); |
| //.. } else { |
| //.. addInstr(env, mk_vMOVsd_RR(arg1, dst)); |
| //.. addInstr(env, X86Instr_SseReRg(op, arg2, dst)); |
| //.. } |
| //.. return dst; |
| //.. } |
| //.. |
| //.. case Iop_ShlN16x8: op = Xsse_SHL16; goto do_SseShift; |
| //.. case Iop_ShlN32x4: op = Xsse_SHL32; goto do_SseShift; |
| //.. case Iop_ShlN64x2: op = Xsse_SHL64; goto do_SseShift; |
| //.. case Iop_SarN16x8: op = Xsse_SAR16; goto do_SseShift; |
| //.. case Iop_SarN32x4: op = Xsse_SAR32; goto do_SseShift; |
| //.. case Iop_ShrN16x8: op = Xsse_SHR16; goto do_SseShift; |
| //.. case Iop_ShrN32x4: op = Xsse_SHR32; goto do_SseShift; |
| //.. case Iop_ShrN64x2: op = Xsse_SHR64; goto do_SseShift; |
| //.. do_SseShift: { |
| //.. HReg greg = iselVecExpr(env, e->Iex.Binop.arg1); |
| //.. X86RMI* rmi = iselIntExpr_RMI(env, e->Iex.Binop.arg2); |
| //.. X86AMode* esp0 = X86AMode_IR(0, hregX86_ESP()); |
| //.. HReg ereg = newVRegV(env); |
| //.. HReg dst = newVRegV(env); |
| //.. REQUIRE_SSE2; |
| //.. addInstr(env, X86Instr_Push(X86RMI_Imm(0))); |
| //.. addInstr(env, X86Instr_Push(X86RMI_Imm(0))); |
| //.. addInstr(env, X86Instr_Push(X86RMI_Imm(0))); |
| //.. addInstr(env, X86Instr_Push(rmi)); |
| //.. addInstr(env, X86Instr_SseLdSt(True/*load*/, ereg, esp0)); |
| //.. addInstr(env, mk_vMOVsd_RR(greg, dst)); |
| //.. addInstr(env, X86Instr_SseReRg(op, ereg, dst)); |
| //.. add_to_esp(env, 16); |
| //.. return dst; |
| //.. } |
| //.. |
| //.. default: |
| //.. break; |
| //.. } /* switch (e->Iex.Binop.op) */ |
| //.. } /* if (e->tag == Iex_Binop) */ |
| //.. |
| //.. if (e->tag == Iex_Mux0X) { |
| //.. HReg r8 = iselIntExpr_R(env, e->Iex.Mux0X.cond); |
| //.. HReg rX = iselVecExpr(env, e->Iex.Mux0X.exprX); |
| //.. HReg r0 = iselVecExpr(env, e->Iex.Mux0X.expr0); |
| //.. HReg dst = newVRegV(env); |
| //.. addInstr(env, mk_vMOVsd_RR(rX,dst)); |
| //.. addInstr(env, X86Instr_Test32(X86RI_Imm(0xFF), X86RM_Reg(r8))); |
| //.. addInstr(env, X86Instr_SseCMov(Xcc_Z,r0,dst)); |
| //.. return dst; |
| //.. } |
| //.. |
| //.. vec_fail: |
| //.. vex_printf("iselVecExpr (subarch = %s): can't reduce\n", |
| //.. LibVEX_ppVexSubArch(env->subarch)); |
| //.. ppIRExpr(e); |
| //.. vpanic("iselVecExpr_wrk"); |
| //.. |
| //.. # undef REQUIRE_SSE1 |
| //.. # undef REQUIRE_SSE2 |
| //.. } |
| |
| |
| /*---------------------------------------------------------*/ |
| /*--- ISEL: Statements ---*/ |
| /*---------------------------------------------------------*/ |
| |
| static void iselStmt ( ISelEnv* env, IRStmt* stmt ) |
| { |
| if (vex_traceflags & VEX_TRACE_VCODE) { |
| vex_printf("\n-- "); |
| ppIRStmt(stmt); |
| vex_printf("\n"); |
| } |
| |
| switch (stmt->tag) { |
| |
| /* --------- STORE --------- */ |
| case Ist_STle: { |
| AMD64AMode* am; |
| IRType tya = typeOfIRExpr(env->type_env, stmt->Ist.STle.addr); |
| IRType tyd = typeOfIRExpr(env->type_env, stmt->Ist.STle.data); |
| vassert(tya == Ity_I64); |
| am = iselIntExpr_AMode(env, stmt->Ist.STle.addr); |
| if (tyd == Ity_I64) { |
| AMD64RI* ri = iselIntExpr_RI(env, stmt->Ist.STle.data); |
| addInstr(env, AMD64Instr_Alu64M(Aalu_MOV,ri,am)); |
| return; |
| } |
| if (tyd == Ity_I8 || tyd == Ity_I16 || tyd == Ity_I32) { |
| HReg r = iselIntExpr_R(env, stmt->Ist.STle.data); |
| addInstr(env, AMD64Instr_Store(tyd==Ity_I8 ? 1 : (tyd==Ity_I16 ? 2 : 4), |
| r,am)); |
| return; |
| } |
| //.. if (tyd == Ity_F64) { |
| //.. HReg r = iselDblExpr(env, stmt->Ist.STle.data); |
| //.. addInstr(env, X86Instr_FpLdSt(False/*store*/, 8, r, am)); |
| //.. return; |
| //.. } |
| //.. if (tyd == Ity_F32) { |
| //.. HReg r = iselFltExpr(env, stmt->Ist.STle.data); |
| //.. addInstr(env, X86Instr_FpLdSt(False/*store*/, 4, r, am)); |
| //.. return; |
| //.. } |
| //.. if (tyd == Ity_I64) { |
| //.. HReg vHi, vLo, rA; |
| //.. iselInt64Expr(&vHi, &vLo, env, stmt->Ist.STle.data); |
| //.. rA = iselIntExpr_R(env, stmt->Ist.STle.addr); |
| //.. addInstr(env, X86Instr_Alu32M( |
| //.. Xalu_MOV, X86RI_Reg(vLo), X86AMode_IR(0, rA))); |
| //.. addInstr(env, X86Instr_Alu32M( |
| //.. Xalu_MOV, X86RI_Reg(vHi), X86AMode_IR(4, rA))); |
| //.. return; |
| //.. } |
| //.. if (tyd == Ity_V128) { |
| //.. HReg r = iselVecExpr(env, stmt->Ist.STle.data); |
| //.. addInstr(env, X86Instr_SseLdSt(False/*store*/, r, am)); |
| //.. return; |
| //.. } |
| //.. break; |
| } |
| |
| /* --------- PUT --------- */ |
| case Ist_Put: { |
| IRType ty = typeOfIRExpr(env->type_env, stmt->Ist.Put.data); |
| if (ty == Ity_I64) { |
| /* We're going to write to memory, so compute the RHS into an |
| AMD64RI. */ |
| AMD64RI* ri = iselIntExpr_RI(env, stmt->Ist.Put.data); |
| addInstr(env, |
| AMD64Instr_Alu64M( |
| Aalu_MOV, |
| ri, |
| AMD64AMode_IR(stmt->Ist.Put.offset, |
| hregAMD64_RBP()) |
| )); |
| return; |
| } |
| if (ty == Ity_I8 || ty == Ity_I16 || ty == Ity_I32) { |
| HReg r = iselIntExpr_R(env, stmt->Ist.Put.data); |
| addInstr(env, AMD64Instr_Store( |
| ty==Ity_I8 ? 1 : (ty==Ity_I16 ? 2 : 4), |
| r, |
| AMD64AMode_IR(stmt->Ist.Put.offset, |
| hregAMD64_RBP()))); |
| return; |
| } |
| //.. if (ty == Ity_V128) { |
| //.. HReg vec = iselVecExpr(env, stmt->Ist.Put.data); |
| //.. X86AMode* am = X86AMode_IR(stmt->Ist.Put.offset, hregX86_EBP()); |
| //.. addInstr(env, X86Instr_SseLdSt(False/*store*/, vec, am)); |
| //.. return; |
| //.. } |
| //.. if (ty == Ity_F32) { |
| //.. HReg f32 = iselFltExpr(env, stmt->Ist.Put.data); |
| //.. X86AMode* am = X86AMode_IR(stmt->Ist.Put.offset, hregX86_EBP()); |
| //.. set_FPU_rounding_default(env); /* paranoia */ |
| //.. addInstr(env, X86Instr_FpLdSt( False/*store*/, 4, f32, am )); |
| //.. return; |
| //.. } |
| //.. if (ty == Ity_F64) { |
| //.. HReg f64 = iselDblExpr(env, stmt->Ist.Put.data); |
| //.. X86AMode* am = X86AMode_IR(stmt->Ist.Put.offset, hregX86_EBP()); |
| //.. set_FPU_rounding_default(env); /* paranoia */ |
| //.. addInstr(env, X86Instr_FpLdSt( False/*store*/, 8, f64, am )); |
| //.. return; |
| //.. } |
| break; |
| } |
| |
| //.. /* --------- Indexed PUT --------- */ |
| //.. case Ist_PutI: { |
| //.. X86AMode* am |
| //.. = genGuestArrayOffset( |
| //.. env, stmt->Ist.PutI.descr, |
| //.. stmt->Ist.PutI.ix, stmt->Ist.PutI.bias ); |
| //.. |
| //.. IRType ty = typeOfIRExpr(env->type_env, stmt->Ist.PutI.data); |
| //.. if (ty == Ity_F64) { |
| //.. HReg val = iselDblExpr(env, stmt->Ist.PutI.data); |
| //.. addInstr(env, X86Instr_FpLdSt( False/*store*/, 8, val, am )); |
| //.. return; |
| //.. } |
| //.. if (ty == Ity_I8) { |
| //.. HReg r = iselIntExpr_R(env, stmt->Ist.PutI.data); |
| //.. addInstr(env, X86Instr_Store( 1, r, am )); |
| //.. return; |
| //.. } |
| //.. if (ty == Ity_I64) { |
| //.. HReg rHi, rLo; |
| //.. X86AMode* am4 = advance4(am); |
| //.. iselInt64Expr(&rHi, &rLo, env, stmt->Ist.PutI.data); |
| //.. addInstr(env, X86Instr_Alu32M( Xalu_MOV, X86RI_Reg(rLo), am )); |
| //.. addInstr(env, X86Instr_Alu32M( Xalu_MOV, X86RI_Reg(rHi), am4 )); |
| //.. return; |
| //.. } |
| //.. break; |
| //.. } |
| |
| /* --------- TMP --------- */ |
| case Ist_Tmp: { |
| IRTemp tmp = stmt->Ist.Tmp.tmp; |
| IRType ty = typeOfIRTemp(env->type_env, tmp); |
| if (ty == Ity_I64 || ty == Ity_I32 |
| || ty == Ity_I16 || ty == Ity_I8) { |
| AMD64RMI* rmi = iselIntExpr_RMI(env, stmt->Ist.Tmp.data); |
| HReg dst = lookupIRTemp(env, tmp); |
| addInstr(env, AMD64Instr_Alu64R(Aalu_MOV,rmi,dst)); |
| return; |
| } |
| if (ty == Ity_I128) { |
| HReg rHi, rLo, dstHi, dstLo; |
| iselInt128Expr(&rHi,&rLo, env, stmt->Ist.Tmp.data); |
| lookupIRTemp128( &dstHi, &dstLo, env, tmp); |
| addInstr(env, mk_iMOVsd_RR(rHi,dstHi) ); |
| addInstr(env, mk_iMOVsd_RR(rLo,dstLo) ); |
| return; |
| } |
| //.. if (ty == Ity_I1) { |
| //.. X86CondCode cond = iselCondCode(env, stmt->Ist.Tmp.data); |
| //.. HReg dst = lookupIRTemp(env, tmp); |
| //.. addInstr(env, X86Instr_Set32(cond, dst)); |
| //.. return; |
| //.. } |
| //.. if (ty == Ity_F64) { |
| //.. HReg dst = lookupIRTemp(env, tmp); |
| //.. HReg src = iselDblExpr(env, stmt->Ist.Tmp.data); |
| //.. addInstr(env, X86Instr_FpUnary(Xfp_MOV,src,dst)); |
| //.. return; |
| //.. } |
| //.. if (ty == Ity_F32) { |
| //.. HReg dst = lookupIRTemp(env, tmp); |
| //.. HReg src = iselFltExpr(env, stmt->Ist.Tmp.data); |
| //.. addInstr(env, X86Instr_FpUnary(Xfp_MOV,src,dst)); |
| //.. return; |
| //.. } |
| //.. if (ty == Ity_V128) { |
| //.. HReg dst = lookupIRTemp(env, tmp); |
| //.. HReg src = iselVecExpr(env, stmt->Ist.Tmp.data); |
| //.. addInstr(env, mk_vMOVsd_RR(src,dst)); |
| //.. return; |
| //.. } |
| break; |
| } |
| |
| /* --------- Call to DIRTY helper --------- */ |
| case Ist_Dirty: { |
| IRType retty; |
| IRDirty* d = stmt->Ist.Dirty.details; |
| Bool passBBP = False; |
| |
| if (d->nFxState == 0) |
| vassert(!d->needsBBP); |
| passBBP = d->nFxState > 0 && d->needsBBP; |
| |
| /* Marshal args, do the call, clear stack. */ |
| doHelperCall( env, passBBP, d->guard, d->cee, d->args ); |
| |
| /* Now figure out what to do with the returned value, if any. */ |
| if (d->tmp == IRTemp_INVALID) |
| /* No return value. Nothing to do. */ |
| return; |
| |
| retty = typeOfIRTemp(env->type_env, d->tmp); |
| if (retty == Ity_I64) { |
| /* The returned value is in %rax. Park it in the register |
| associated with tmp. */ |
| HReg dst = lookupIRTemp(env, d->tmp); |
| addInstr(env, mk_iMOVsd_RR(hregAMD64_RAX(),dst) ); |
| return; |
| } |
| break; |
| } |
| |
| /* --------- MEM FENCE --------- */ |
| case Ist_MFence: |
| addInstr(env, AMD64Instr_MFence()); |
| return; |
| |
| /* --------- EXIT --------- */ |
| case Ist_Exit: { |
| AMD64RI* dst; |
| AMD64CondCode cc; |
| if (stmt->Ist.Exit.dst->tag != Ico_U64) |
| vpanic("iselStmt(amd64): Ist_Exit: dst is not a 64-bit value"); |
| dst = iselIntExpr_RI(env, IRExpr_Const(stmt->Ist.Exit.dst)); |
| cc = iselCondCode(env,stmt->Ist.Exit.guard); |
| addInstr(env, AMD64Instr_Goto(stmt->Ist.Exit.jk, cc, dst)); |
| return; |
| } |
| |
| default: break; |
| } |
| ppIRStmt(stmt); |
| vpanic("iselStmt(amd64)"); |
| } |
| |
| |
| /*---------------------------------------------------------*/ |
| /*--- ISEL: Basic block terminators (Nexts) ---*/ |
| /*---------------------------------------------------------*/ |
| |
| static void iselNext ( ISelEnv* env, IRExpr* next, IRJumpKind jk ) |
| { |
| AMD64RI* ri; |
| if (vex_traceflags & VEX_TRACE_VCODE) { |
| vex_printf("\n-- goto {"); |
| ppIRJumpKind(jk); |
| vex_printf("} "); |
| ppIRExpr(next); |
| vex_printf("\n"); |
| } |
| ri = iselIntExpr_RI(env, next); |
| addInstr(env, AMD64Instr_Goto(jk, Acc_ALWAYS,ri)); |
| } |
| |
| |
| /*---------------------------------------------------------*/ |
| /*--- Insn selector top-level ---*/ |
| /*---------------------------------------------------------*/ |
| |
| /* Translate an entire BB to amd64 code. */ |
| |
| HInstrArray* iselBB_AMD64 ( IRBB* bb, VexSubArch subarch_host ) |
| { |
| Int i, j; |
| HReg hreg, hregHI; |
| |
| /* sanity ... */ |
| vassert(subarch_host == VexSubArch_NONE); |
| |
| /* Make up an initial environment to use. */ |
| ISelEnv* env = LibVEX_Alloc(sizeof(ISelEnv)); |
| env->vreg_ctr = 0; |
| |
| /* Set up output code array. */ |
| env->code = newHInstrArray(); |
| |
| /* Copy BB's type env. */ |
| env->type_env = bb->tyenv; |
| |
| /* Make up an IRTemp -> virtual HReg mapping. This doesn't |
| change as we go along. */ |
| env->n_vregmap = bb->tyenv->types_used; |
| env->vregmap = LibVEX_Alloc(env->n_vregmap * sizeof(HReg)); |
| env->vregmapHI = LibVEX_Alloc(env->n_vregmap * sizeof(HReg)); |
| |
| /* and finally ... */ |
| env->subarch = subarch_host; |
| |
| /* For each IR temporary, allocate a suitably-kinded virtual |
| register. */ |
| j = 0; |
| for (i = 0; i < env->n_vregmap; i++) { |
| hregHI = hreg = INVALID_HREG; |
| switch (bb->tyenv->types[i]) { |
| case Ity_I1: |
| case Ity_I8: |
| case Ity_I16: |
| case Ity_I32: |
| case Ity_I64: hreg = mkHReg(j++, HRcInt64, True); break; |
| case Ity_I128: hreg = mkHReg(j++, HRcInt64, True); |
| hregHI = mkHReg(j++, HRcInt64, True); break; |
| |
| case Ity_F32: |
| case Ity_F64: hreg = mkHReg(j++, HRcFlt64, True); break; |
| case Ity_V128: hreg = mkHReg(j++, HRcVec128, True); break; |
| default: ppIRType(bb->tyenv->types[i]); |
| vpanic("iselBB(amd64): IRTemp type"); |
| } |
| env->vregmap[i] = hreg; |
| env->vregmapHI[i] = hregHI; |
| } |
| env->vreg_ctr = j; |
| |
| /* Ok, finally we can iterate over the statements. */ |
| for (i = 0; i < bb->stmts_used; i++) |
| if (bb->stmts[i]) |
| iselStmt(env,bb->stmts[i]); |
| |
| iselNext(env,bb->next,bb->jumpkind); |
| |
| /* record the number of vregs we used. */ |
| env->code->n_vregs = env->vreg_ctr; |
| return env->code; |
| } |
| |
| |
| /*---------------------------------------------------------------*/ |
| /*--- end host-amd64/isel.c ---*/ |
| /*---------------------------------------------------------------*/ |