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gerrit-public.fairphone.software / platform / external / valgrind / 8a3e969361a35202e2bc0b02967bc8a1bd0390d0 / . / priv / guest_mips_toIR.c
blob: f9fb4423a7db1f57346212db401db86551d0ab15 [file] [log] [blame]
/*--------------------------------------------------------------------*/
/*--- begin guest_mips_toIR.c ---*/
/*--------------------------------------------------------------------*/
/*
This file is part of Valgrind, a dynamic binary instrumentation
framework.
Copyright (C) 2010-2012 RT-RK
mips-valgrind@rt-rk.com
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; either version 2 of the
License, or (at your option) any later version.
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. See the GNU
General Public License for more details.
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.
The GNU General Public License is contained in the file COPYING.
*/
/* Translates MIPS code to IR. */
#include "libvex_basictypes.h"
#include "libvex_ir.h"
#include "libvex.h"
#include "libvex_guest_mips32.h"
#include "main_util.h"
#include "main_globals.h"
#include "guest_generic_bb_to_IR.h"
#include "guest_mips_defs.h"
/*------------------------------------------------------------*/
/*--- Globals ---*/
/*------------------------------------------------------------*/
/* These are set at the start of the translation of a instruction, so
that we don't have to pass them around endlessly. CONST means does
not change during translation of the instruction.
*/
/* CONST: is the host bigendian? This has to do with float vs double
register accesses on VFP, but it's complex and not properly thought
out. */
static Bool host_is_bigendian;
/* Pointer to the guest code area. */
static UChar *guest_code;
/* The guest address corresponding to guest_code[0]. */
static Addr32 guest_PC_bbstart;
/* CONST: The guest address for the instruction currently being
translated. */
static Addr32 guest_PC_curr_instr;
/* MOD: The IRSB* into which we're generating code. */
static IRSB *irsb;
/* Is our guest binary 32 or 64bit? Set at each call to
disInstr_MIPS below. */
static Bool mode64 = False;
/*------------------------------------------------------------*/
/*--- Debugging output ---*/
/*------------------------------------------------------------*/
#define DIP(format, args...) \
if (vex_traceflags & VEX_TRACE_FE) \
vex_printf(format, ## args)
/*------------------------------------------------------------*/
/*--- Helper bits and pieces for deconstructing the ---*/
/*--- mips insn stream. ---*/
/*------------------------------------------------------------*/
/* ---------------- Integer registers ---------------- */
static UInt integerGuestRegOffset(UInt iregNo)
{
/* Do we care about endianness here? We do if sub-parts of integer
registers are accessed, but I don't think that ever happens on
MIPS. */
UInt ret;
switch (iregNo) {
case 0:
ret = offsetof(VexGuestMIPS32State, guest_r0); break;
case 1:
ret = offsetof(VexGuestMIPS32State, guest_r1); break;
case 2:
ret = offsetof(VexGuestMIPS32State, guest_r2); break;
case 3:
ret = offsetof(VexGuestMIPS32State, guest_r3); break;
case 4:
ret = offsetof(VexGuestMIPS32State, guest_r4); break;
case 5:
ret = offsetof(VexGuestMIPS32State, guest_r5); break;
case 6:
ret = offsetof(VexGuestMIPS32State, guest_r6); break;
case 7:
ret = offsetof(VexGuestMIPS32State, guest_r7); break;
case 8:
ret = offsetof(VexGuestMIPS32State, guest_r8); break;
case 9:
ret = offsetof(VexGuestMIPS32State, guest_r9); break;
case 10:
ret = offsetof(VexGuestMIPS32State, guest_r10); break;
case 11:
ret = offsetof(VexGuestMIPS32State, guest_r11); break;
case 12:
ret = offsetof(VexGuestMIPS32State, guest_r12); break;
case 13:
ret = offsetof(VexGuestMIPS32State, guest_r13); break;
case 14:
ret = offsetof(VexGuestMIPS32State, guest_r14); break;
case 15:
ret = offsetof(VexGuestMIPS32State, guest_r15); break;
case 16:
ret = offsetof(VexGuestMIPS32State, guest_r16); break;
case 17:
ret = offsetof(VexGuestMIPS32State, guest_r17); break;
case 18:
ret = offsetof(VexGuestMIPS32State, guest_r18); break;
case 19:
ret = offsetof(VexGuestMIPS32State, guest_r19); break;
case 20:
ret = offsetof(VexGuestMIPS32State, guest_r20); break;
case 21:
ret = offsetof(VexGuestMIPS32State, guest_r21); break;
case 22:
ret = offsetof(VexGuestMIPS32State, guest_r22); break;
case 23:
ret = offsetof(VexGuestMIPS32State, guest_r23); break;
case 24:
ret = offsetof(VexGuestMIPS32State, guest_r24); break;
case 25:
ret = offsetof(VexGuestMIPS32State, guest_r25); break;
case 26:
ret = offsetof(VexGuestMIPS32State, guest_r26); break;
case 27:
ret = offsetof(VexGuestMIPS32State, guest_r27); break;
case 28:
ret = offsetof(VexGuestMIPS32State, guest_r28); break;
case 29:
ret = offsetof(VexGuestMIPS32State, guest_r29); break;
case 30:
ret = offsetof(VexGuestMIPS32State, guest_r30); break;
case 31:
ret = offsetof(VexGuestMIPS32State, guest_r31); break;
default:
vassert(0);
break;
}
return ret;
}
#define OFFB_PC offsetof(VexGuestMIPS32State, guest_PC)
/* ---------------- Floating point registers ---------------- */
static UInt floatGuestRegOffset(UInt fregNo)
{
vassert(fregNo < 32);
UInt ret;
switch (fregNo) {
case 0:
ret = offsetof(VexGuestMIPS32State, guest_f0); break;
case 1:
ret = offsetof(VexGuestMIPS32State, guest_f1); break;
case 2:
ret = offsetof(VexGuestMIPS32State, guest_f2); break;
case 3:
ret = offsetof(VexGuestMIPS32State, guest_f3); break;
case 4:
ret = offsetof(VexGuestMIPS32State, guest_f4); break;
case 5:
ret = offsetof(VexGuestMIPS32State, guest_f5); break;
case 6:
ret = offsetof(VexGuestMIPS32State, guest_f6); break;
case 7:
ret = offsetof(VexGuestMIPS32State, guest_f7); break;
case 8:
ret = offsetof(VexGuestMIPS32State, guest_f8); break;
case 9:
ret = offsetof(VexGuestMIPS32State, guest_f9); break;
case 10:
ret = offsetof(VexGuestMIPS32State, guest_f10); break;
case 11:
ret = offsetof(VexGuestMIPS32State, guest_f11); break;
case 12:
ret = offsetof(VexGuestMIPS32State, guest_f12); break;
case 13:
ret = offsetof(VexGuestMIPS32State, guest_f13); break;
case 14:
ret = offsetof(VexGuestMIPS32State, guest_f14); break;
case 15:
ret = offsetof(VexGuestMIPS32State, guest_f15); break;
case 16:
ret = offsetof(VexGuestMIPS32State, guest_f16); break;
case 17:
ret = offsetof(VexGuestMIPS32State, guest_f17); break;
case 18:
ret = offsetof(VexGuestMIPS32State, guest_f18); break;
case 19:
ret = offsetof(VexGuestMIPS32State, guest_f19); break;
case 20:
ret = offsetof(VexGuestMIPS32State, guest_f20); break;
case 21:
ret = offsetof(VexGuestMIPS32State, guest_f21); break;
case 22:
ret = offsetof(VexGuestMIPS32State, guest_f22); break;
case 23:
ret = offsetof(VexGuestMIPS32State, guest_f23); break;
case 24:
ret = offsetof(VexGuestMIPS32State, guest_f24); break;
case 25:
ret = offsetof(VexGuestMIPS32State, guest_f25); break;
case 26:
ret = offsetof(VexGuestMIPS32State, guest_f26); break;
case 27:
ret = offsetof(VexGuestMIPS32State, guest_f27); break;
case 28:
ret = offsetof(VexGuestMIPS32State, guest_f28); break;
case 29:
ret = offsetof(VexGuestMIPS32State, guest_f29); break;
case 30:
ret = offsetof(VexGuestMIPS32State, guest_f30); break;
case 31:
ret = offsetof(VexGuestMIPS32State, guest_f31); break;
default:
vassert(0);
break;
}
return ret;
}
/* Do a endian load of a 32-bit word, regardless of the
endianness of the underlying host. */
static inline UInt getUInt(UChar * p)
{
UInt w = 0;
#if defined (_MIPSEL)
w = (w << 8) | p[3];
w = (w << 8) | p[2];
w = (w << 8) | p[1];
w = (w << 8) | p[0];
#elif defined (_MIPSEB)
w = (w << 8) | p[0];
w = (w << 8) | p[1];
w = (w << 8) | p[2];
w = (w << 8) | p[3];
#endif
return w;
}
#define BITS2(_b1,_b0) \
(((_b1) << 1) | (_b0))
#define BITS3(_b2,_b1,_b0) \
(((_b2) << 2) | ((_b1) << 1) | (_b0))
#define BITS4(_b3,_b2,_b1,_b0) \
(((_b3) << 3) | ((_b2) << 2) | ((_b1) << 1) | (_b0))
#define BITS5(_b4,_b3,_b2,_b1,_b0) \
(((_b4) << 4) | BITS4((_b3),(_b2),(_b1),(_b0)))
#define BITS6(_b5,_b4,_b3,_b2,_b1,_b0) \
((BITS2((_b5),(_b4)) << 4) \
| BITS4((_b3),(_b2),(_b1),(_b0)))
#define BITS8(_b7,_b6,_b5,_b4,_b3,_b2,_b1,_b0) \
((BITS4((_b7),(_b6),(_b5),(_b4)) << 4) \
| BITS4((_b3),(_b2),(_b1),(_b0)))
#define LOAD_STORE_PATTERN \
t1 = newTemp(Ity_I32); \
assign(t1, binop(Iop_Add32, getIReg(rs), mkU32(extend_s_16to32(imm)))); \
#define LWX_SWX_PATTERN \
t2 = newTemp(Ity_I32); \
assign(t2, binop(Iop_And32, mkexpr(t1), mkU32(0xFFFFFFFC))); \
t4 = newTemp(Ity_I32); \
assign(t4, binop(Iop_And32, mkexpr(t1), mkU32(0x00000003)))
#define SXXV_PATTERN(op) \
putIReg(rd, binop(op, \
getIReg(rt), \
unop(Iop_32to8, \
binop(Iop_And32, \
getIReg(rs), \
mkU32(0x0000001F) \
) \
) \
) \
)
#define SXX_PATTERN(op) \
putIReg(rd, binop(op, getIReg(rt), mkU8(sa)));
#define ALU_PATTERN(op) \
putIReg(rd, binop(op, getIReg(rs), getIReg(rt)));
#define ALUI_PATTERN(op) \
putIReg(rt, binop(op, getIReg(rs), mkU32(imm)));
#define ALUI_PATTERN64(op) \
putIReg(rt, binop(op, getIReg(rs), mkU64(imm)));
#define FP_CONDITIONAL_CODE \
t3 = newTemp(Ity_I32); \
assign(t3, binop(Iop_And32, IRExpr_Mux0X( unop(Iop_1Uto8, \
binop(Iop_CmpEQ32, mkU32(cc), mkU32(0))), \
binop(Iop_Shr32, getFCSR(), mkU8(24+cc)), \
binop(Iop_Shr32, getFCSR(), mkU8(23))), mkU32(0x1)));
/*------------------------------------------------------------*/
/*--- Field helpers ---*/
/*------------------------------------------------------------*/
static UInt get_opcode(UInt mipsins)
{
return (0xFC000000 & mipsins) >> 26;
}
static UInt get_rs(UInt mipsins)
{
return (0x03E00000 & mipsins) >> 21;
}
static UInt get_rt(UInt mipsins)
{
return (0x001F0000 & mipsins) >> 16;
}
static UInt get_imm(UInt mipsins)
{
return (0x0000FFFF & mipsins);
}
static UInt get_instr_index(UInt mipsins)
{
return (0x03FFFFFF & mipsins);
}
static UInt get_rd(UInt mipsins)
{
return (0x0000F800 & mipsins) >> 11;
}
static UInt get_sa(UInt mipsins)
{
return (0x000007C0 & mipsins) >> 6;
}
static UInt get_function(UInt mipsins)
{
return (0x0000003F & mipsins);
}
static UInt get_ft(UInt mipsins)
{
return (0x001F0000 & mipsins) >> 16;
}
static UInt get_fs(UInt mipsins)
{
return (0x0000F800 & mipsins) >> 11;
}
static UInt get_fd(UInt mipsins)
{
return (0x000007C0 & mipsins) >> 6;
}
static UInt get_mov_cc(UInt mipsins)
{
return (0x001C0000 & mipsins) >> 18;
}
static UInt get_bc1_cc(UInt mipsins)
{
return (0x001C0000 & mipsins) >> 18;
}
static UInt get_fpc_cc(UInt mipsins)
{
return (0x00000700 & mipsins) >> 8;
}
static UInt get_tf(UInt mipsins)
{
return (0x00010000 & mipsins) >> 16;
}
static UInt get_nd(UInt mipsins)
{
return (0x00020000 & mipsins) >> 17;
}
static UInt get_fmt(UInt mipsins)
{
return (0x03E00000 & mipsins) >> 21;
}
static UInt get_FC(UInt mipsins)
{
return (0x000000F0 & mipsins) >> 4;
}
static UInt get_cond(UInt mipsins)
{
return (0x0000000F & mipsins);
}
/* for break & syscall */
static UInt get_code(UInt mipsins)
{
return (0xFFC0 & mipsins) >> 6;
}
static UInt get_lsb(UInt mipsins)
{
return (0x7C0 & mipsins) >> 6;
}
static UInt get_msb(UInt mipsins)
{
return (0x0000F800 & mipsins) >> 11;
}
static UInt get_rot(UInt mipsins)
{
return (0x00200000 & mipsins) >> 21;
}
static UInt get_rotv(UInt mipsins)
{
return (0x00000040 & mipsins) >> 6;
}
static UInt get_sel(UInt mipsins)
{
return (0x00000007 & mipsins);
}
static Bool branch_or_jump(UChar * addr)
{
UInt fmt;
UInt cins = getUInt(addr);
UInt opcode = get_opcode(cins);
UInt rt = get_rt(cins);
UInt function = get_function(cins);
/* bgtz, blez, bne, beq, jal */
if (opcode == 0x07 || opcode == 0x06 || opcode == 0x05 || opcode == 0x04
|| opcode == 0x03 || opcode == 0x02) {
return True;
}
/* bgez */
if (opcode == 0x01 && rt == 0x01) {
return True;
}
/* bgezal */
if (opcode == 0x01 && rt == 0x11) {
return True;
}
/* bltzal */
if (opcode == 0x01 && rt == 0x10) {
return True;
}
/* bltz */
if (opcode == 0x01 && rt == 0x00) {
return True;
}
/* jalr */
if (opcode == 0x00 && function == 0x09) {
return True;
}
/* jr */
if (opcode == 0x00 && function == 0x08) {
return True;
}
if (opcode == 0x11) {
/*bc1f & bc1t */
fmt = get_fmt(cins);
if (fmt == 0x08) {
return True;
}
}
return False;
}
static Bool is_Branch_or_Jump_and_Link(UChar * addr)
{
UInt cins = getUInt(addr);
UInt opcode = get_opcode(cins);
UInt rt = get_rt(cins);
UInt function = get_function(cins);
/* jal */
if (opcode == 0x02) {
return True;
}
/* bgezal */
if (opcode == 0x01 && rt == 0x11) {
return True;
}
/* bltzal */
if (opcode == 0x01 && rt == 0x10) {
return True;
}
/* jalr */
if (opcode == 0x00 && function == 0x09) {
return True;
}
return False;
}
static Bool branch_or_link_likely(UChar * addr)
{
UInt cins = getUInt(addr);
UInt opcode = get_opcode(cins);
UInt rt = get_rt(cins);
/* bgtzl, blezl, bnel, beql */
if (opcode == 0x17 || opcode == 0x16 || opcode == 0x15 || opcode == 0x14)
return True;
/* bgezl */
if (opcode == 0x01 && rt == 0x03)
return True;
/* bgezall */
if (opcode == 0x01 && rt == 0x13)
return True;
/* bltzall */
if (opcode == 0x01 && rt == 0x12)
return True;
/* bltzl */
if (opcode == 0x01 && rt == 0x02)
return True;
return False;
}
/*------------------------------------------------------------*/
/*--- Helper bits and pieces for creating IR fragments. ---*/
/*------------------------------------------------------------*/
static IRExpr *mkU8(UInt i)
{
vassert(i < 256);
return IRExpr_Const(IRConst_U8((UChar) i));
}
/* Create an expression node for a 32-bit integer constant */
static IRExpr *mkU32(UInt i)
{
return IRExpr_Const(IRConst_U32(i));
}
/* Create an expression node for a 64-bit integer constant */
static IRExpr *mkU64(ULong i)
{
return IRExpr_Const(IRConst_U64(i));
}
static IRExpr *mkexpr(IRTemp tmp)
{
return IRExpr_RdTmp(tmp);
}
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 *triop(IROp op, IRExpr * a1, IRExpr * a2, IRExpr * a3)
{
return IRExpr_Triop(op, a1, a2, a3);
}
static IRExpr *load(IRType ty, IRExpr * addr)
{
IRExpr *load1 = NULL;
#if defined (_MIPSEL)
load1 = IRExpr_Load(Iend_LE, ty, addr);
#elif defined (_MIPSEB)
load1 = IRExpr_Load(Iend_BE, ty, addr);
#endif
return load1;
}
/* Add a statement to the list held by "irsb". */
static void stmt(IRStmt * st)
{
addStmtToIRSB(irsb, st);
}
static void assign(IRTemp dst, IRExpr * e)
{
stmt(IRStmt_WrTmp(dst, e));
}
static void store(IRExpr * addr, IRExpr * data)
{
#if defined (_MIPSEL)
stmt(IRStmt_Store(Iend_LE, addr, data));
#elif defined (_MIPSEB)
stmt(IRStmt_Store(Iend_BE, addr, data));
#endif
}
/* Generate a new temporary of the given type. */
static IRTemp newTemp(IRType ty)
{
vassert(isPlausibleIRType(ty));
return newIRTemp(irsb->tyenv, ty);
}
/* Generate an expression for SRC rotated right by ROT. */
static IRExpr *genROR32(IRExpr * src, Int rot)
{
vassert(rot >= 0 && rot < 32);
if (rot == 0)
return src;
return binop(Iop_Or32, binop(Iop_Shl32, src, mkU8(32 - rot)),
binop(Iop_Shr32, src, mkU8(rot)));
}
static IRExpr *genRORV32(IRExpr * src, IRExpr * rs)
{
IRTemp t0 = newTemp(Ity_I8);
IRTemp t1 = newTemp(Ity_I8);
assign(t0, unop(Iop_32to8, binop(Iop_And32, rs, mkU32(0x0000001F))));
assign(t1, binop(Iop_Sub8, mkU8(32), mkexpr(t0)));
return binop(Iop_Or32, binop(Iop_Shl32, src, mkexpr(t1)),
binop(Iop_Shr32, src, mkexpr(t0)));
}
static UInt extend_s_16to32(UInt x)
{
return (UInt) ((((Int) x) << 16) >> 16);
}
static UInt extend_s_18to32(UInt x)
{
return (UInt) ((((Int) x) << 14) >> 14);
}
static void jmp_lit( /*MOD*/DisResult* dres,
IRJumpKind kind, Addr32 d32 )
{
vassert(dres->whatNext == Dis_Continue);
vassert(dres->len == 0);
vassert(dres->continueAt == 0);
vassert(dres->jk_StopHere == Ijk_INVALID);
dres->whatNext = Dis_StopHere;
dres->jk_StopHere = kind;
stmt( IRStmt_Put( OFFB_PC, mkU32(d32) ) );
}
/* Fetch a byte from the guest insn stream. */
static UChar getIByte(Int delta)
{
return guest_code[delta];
}
static IRExpr *getIReg(UInt iregNo)
{
if (0 == iregNo) {
return mode64 ? mkU64(0x0) : mkU32(0x0);
} else {
IRType ty = mode64 ? Ity_I64 : Ity_I32;
vassert(iregNo < 32);
return IRExpr_Get(integerGuestRegOffset(iregNo), ty);
}
}
static IRExpr *getHI(void)
{
return IRExpr_Get(offsetof(VexGuestMIPS32State, guest_HI), Ity_I32);
}
static IRExpr *getLO(void)
{
return IRExpr_Get(offsetof(VexGuestMIPS32State, guest_LO), Ity_I32);
}
static IRExpr *getFCSR(void)
{
return IRExpr_Get(offsetof(VexGuestMIPS32State, guest_FCSR), Ity_I32);
}
static void putFCSR(IRExpr * e)
{
stmt(IRStmt_Put(offsetof(VexGuestMIPS32State, guest_FCSR), e));
}
static IRExpr *getULR(void)
{
return IRExpr_Get(offsetof(VexGuestMIPS32State, guest_ULR), Ity_I32);
}
static void putIReg(UInt archreg, IRExpr * e)
{
IRType ty = mode64 ? Ity_I64 : Ity_I32;
vassert(archreg < 32);
vassert(typeOfIRExpr(irsb->tyenv, e) == ty);
if (archreg != 0)
stmt(IRStmt_Put(integerGuestRegOffset(archreg), e));
}
static void putLO(IRExpr * e)
{
stmt(IRStmt_Put(offsetof(VexGuestMIPS32State, guest_LO), e));
}
static void putHI(IRExpr * e)
{
stmt(IRStmt_Put(offsetof(VexGuestMIPS32State, guest_HI), e));
}
static void putPC(IRExpr * e)
{
stmt(IRStmt_Put(OFFB_PC, e));
}
static IRExpr *mkWidenFrom32(IRType ty, IRExpr * src, Bool sined)
{
vassert(ty == Ity_I32 || ty == Ity_I64);
if (ty == Ity_I32)
return src;
return (sined) ? unop(Iop_32Sto64, src) : unop(Iop_32Uto64, src);
}
/* Narrow 8/16/32 bit int expr to 8/16/32. Clearly only some
of these combinations make sense. */
static IRExpr *narrowTo(IRType dst_ty, IRExpr * e)
{
IRType src_ty = typeOfIRExpr(irsb->tyenv, e);
if (src_ty == dst_ty)
return e;
if (src_ty == Ity_I32 && dst_ty == Ity_I16)
return unop(Iop_32to16, e);
if (src_ty == Ity_I32 && dst_ty == Ity_I8)
return unop(Iop_32to8, e);
if (src_ty == Ity_I64 && dst_ty == Ity_I8) {
vassert(mode64);
return unop(Iop_64to8, e);
}
if (src_ty == Ity_I64 && dst_ty == Ity_I16) {
vassert(mode64);
return unop(Iop_64to16, e);
}
if (vex_traceflags & VEX_TRACE_FE) {
vex_printf("\nsrc, dst tys are: ");
ppIRType(src_ty);
vex_printf(", ");
ppIRType(dst_ty);
vex_printf("\n");
}
vpanic("narrowTo(mips)");
return 0;
}
static IRExpr *mkNarrowTo32(IRType ty, IRExpr * src)
{
vassert(ty == Ity_I32 || ty == Ity_I64);
return ty == Ity_I64 ? unop(Iop_64to32, src) : src;
}
static IRExpr *getLoFromF64(IRType ty, IRExpr * src)
{
vassert(ty == Ity_F32 || ty == Ity_F64);
if (ty == Ity_F64) {
IRTemp t0, t1;
t0 = newTemp(Ity_I64);
t1 = newTemp(Ity_I32);
assign(t0, unop(Iop_ReinterpF64asI64, src));
assign(t1, unop(Iop_64to32, mkexpr(t0)));
return unop(Iop_ReinterpI32asF32, mkexpr(t1));
} else
return src;
}
static IRExpr *mkWidenFromF32(IRType ty, IRExpr * src)
{
vassert(ty == Ity_F32 || ty == Ity_F64);
return ty == Ity_F64 ? unop(Iop_F32toF64, src) : src;
}
static IRExpr *dis_branch_likely(IRExpr * guard, UInt imm)
{
ULong branch_offset;
IRTemp t0;
/* PC = PC + (SignExtend(signed_immed_24) << 2)
An 18-bit signed offset (the 16-bit offset field shifted left 2 bits)
is added to the address of the instruction following
the branch (not the branch itself), in the branch delay slot, to form
a PC-relative effective target address. */
branch_offset = extend_s_18to32(imm << 2);
t0 = newTemp(Ity_I1);
assign(t0, guard);
stmt(IRStmt_Exit(mkexpr(t0), Ijk_Boring,
IRConst_U32(guest_PC_curr_instr + 8), OFFB_PC));
irsb->jumpkind = Ijk_Boring;
return mkU32(guest_PC_curr_instr + 4 + branch_offset);
}
static void dis_branch(Bool link, IRExpr * guard, UInt imm, IRStmt ** set)
{
ULong branch_offset;
IRTemp t0;
if (link) { // LR (GPR31) = addr of the 2nd instr after branch instr
putIReg(31, mkU32(guest_PC_curr_instr + 8));
}
/* PC = PC + (SignExtend(signed_immed_24) << 2)
An 18-bit signed offset (the 16-bit offset field shifted left 2 bits)
is added to the address of the instruction following
the branch (not the branch itself), in the branch delay slot, to form
a PC-relative effective target address. */
branch_offset = extend_s_18to32(imm << 2);
t0 = newTemp(Ity_I1);
assign(t0, guard);
*set = IRStmt_Exit(mkexpr(t0), link ? Ijk_Call : Ijk_Boring,
IRConst_U32(guest_PC_curr_instr + 4 + (UInt) branch_offset),
OFFB_PC);
}
static IRExpr *getFReg(UInt dregNo)
{
vassert(dregNo < 32);
IRType ty = mode64 ? Ity_F64 : Ity_F32;
return IRExpr_Get(floatGuestRegOffset(dregNo), ty);
}
static IRExpr *getDReg(UInt dregNo)
{
vassert(dregNo < 32);
IRTemp t0 = newTemp(Ity_F32);
IRTemp t1 = newTemp(Ity_F32);
IRTemp t2 = newTemp(Ity_F64);
IRTemp t3 = newTemp(Ity_I32);
IRTemp t4 = newTemp(Ity_I32);
IRTemp t5 = newTemp(Ity_I64);
#if defined (_MIPSEL)
assign(t0, getFReg(dregNo));
assign(t1, getFReg(dregNo + 1));
#elif defined (_MIPSEB)
assign(t0, getFReg(dregNo + 1));
assign(t1, getFReg(dregNo));
#endif
assign(t3, unop(Iop_ReinterpF32asI32, mkexpr(t0)));
assign(t4, unop(Iop_ReinterpF32asI32, mkexpr(t1)));
assign(t5, binop(Iop_32HLto64, mkexpr(t4), mkexpr(t3)));
assign(t2, unop(Iop_ReinterpI64asF64, mkexpr(t5)));
return mkexpr(t2);
}
static void putFReg(UInt dregNo, IRExpr * e)
{
vassert(dregNo < 32);
IRType ty = mode64 ? Ity_F64 : Ity_F32;
vassert(typeOfIRExpr(irsb->tyenv, e) == ty);
stmt(IRStmt_Put(floatGuestRegOffset(dregNo), e));
}
static void putDReg(UInt dregNo, IRExpr * e)
{
vassert(dregNo < 32);
vassert(typeOfIRExpr(irsb->tyenv, e) == Ity_F64);
IRTemp t1 = newTemp(Ity_F64);
IRTemp t4 = newTemp(Ity_I32);
IRTemp t5 = newTemp(Ity_I32);
IRTemp t6 = newTemp(Ity_I64);
assign(t1, e);
assign(t6, unop(Iop_ReinterpF64asI64, mkexpr(t1)));
assign(t4, unop(Iop_64HIto32, mkexpr(t6))); // hi
assign(t5, unop(Iop_64to32, mkexpr(t6))); //lo
#if defined (_MIPSEL)
putFReg(dregNo, unop(Iop_ReinterpI32asF32, mkexpr(t5)));
putFReg(dregNo + 1, unop(Iop_ReinterpI32asF32, mkexpr(t4)));
#elif defined (_MIPSEB)
putFReg(dregNo + 1, unop(Iop_ReinterpI32asF32, mkexpr(t5)));
putFReg(dregNo, unop(Iop_ReinterpI32asF32, mkexpr(t4)));
#endif
}
static void setFPUCondCode(IRExpr * e, UInt cc)
{
if (cc == 0) {
DIP("setFpu: %d\n", cc);
putFCSR(binop(Iop_And32, getFCSR(), mkU32(0xFF7FFFFF)));
putFCSR(binop(Iop_Or32, getFCSR(), binop(Iop_Shl32, e, mkU8(23))));
} else {
DIP("setFpu1: %d\n", cc);
putFCSR(binop(Iop_And32, getFCSR(), unop(Iop_Not32,
binop(Iop_Shl32, mkU32(0x01000000), mkU8(cc)))));
putFCSR(binop(Iop_Or32, getFCSR(), binop(Iop_Shl32, e, mkU8(24 + cc))));
}
}
static IRExpr */* :: Ity_I32 */get_IR_roundingmode(void)
{
/*
rounding mode | MIPS | IR
------------------------
to nearest | 00 | 00
to zero | 01 | 11
to +infinity | 10 | 10
to -infinity | 11 | 01
*/
IRTemp rm_MIPS = newTemp(Ity_I32);
/* Last two bits in FCSR are rounding mode. */
assign(rm_MIPS, binop(Iop_And32, IRExpr_Get(offsetof(VexGuestMIPS32State,
guest_FCSR), Ity_I32), mkU32(3)));
// rm_IR = XOR( rm_MIPS32, (rm_MIPS32 << 1) & 2)
return binop(Iop_Xor32, mkexpr(rm_MIPS), binop(Iop_And32,
binop(Iop_Shl32, mkexpr(rm_MIPS), mkU8(1)), mkU32(2)));
}
/*********************************************************/
/*--- Floating Point Compare ---*/
/*********************************************************/
static Bool dis_instr_CCondFmt(UInt cins)
{
IRTemp t0, t1, t2, t3;
IRTemp ccIR = newTemp(Ity_I32);
IRTemp ccMIPS = newTemp(Ity_I32);
UInt FC = get_FC(cins);
UInt fmt = get_fmt(cins);
UInt fs = get_fs(cins);
UInt ft = get_ft(cins);
UInt cond = get_cond(cins);
if (FC == 0x3) { // C.cond.fmt
UInt fpc_cc = get_fpc_cc(cins);
switch (fmt) {
case 0x10: { //C.cond.S
DIP("C.cond.S %d f%d, f%d\n", fpc_cc, fs, ft);
t0 = newTemp(Ity_I32);
t1 = newTemp(Ity_I32);
t2 = newTemp(Ity_I32);
t3 = newTemp(Ity_I32);
assign(ccIR, binop(Iop_CmpF64, unop(Iop_F32toF64, getFReg(fs)),
unop(Iop_F32toF64, getFReg(ft))));
/* Map compare result from IR to MIPS */
/*
FP cmp result | MIPS | IR
--------------------------
UN | 0x1 | 0x45
EQ | 0x2 | 0x40
GT | 0x4 | 0x00
LT | 0x8 | 0x01
*/
// ccMIPS = Shl(1, (~(ccIR>>5) & 2)
// | ((ccIR ^ (ccIR>>6)) & 1)
assign(ccMIPS, binop(Iop_Shl32, mkU32(1), unop(Iop_32to8,
binop(Iop_Or32, binop(Iop_And32, unop(Iop_Not32,
binop(Iop_Shr32, mkexpr(ccIR), mkU8(5))), mkU32(2)),
binop(Iop_And32, binop(Iop_Xor32, mkexpr(ccIR),
binop(Iop_Shr32, mkexpr(ccIR), mkU8(6))),
mkU32(1))))));
assign(t0, binop(Iop_And32, mkexpr(ccMIPS), mkU32(0x1))); // UN
assign(t1, binop(Iop_And32, binop(Iop_Shr32, mkexpr(ccMIPS),
mkU8(0x1)), mkU32(0x1))); // EQ
assign(t2, binop(Iop_And32, unop(Iop_Not32, binop(Iop_Shr32,
mkexpr(ccMIPS), mkU8(0x2))), mkU32(0x1))); // NGT
assign(t3, binop(Iop_And32, binop(Iop_Shr32, mkexpr(ccMIPS),
mkU8(0x3)), mkU32(0x1))); // LT
switch (cond) {
case 0x0:
setFPUCondCode(mkU32(0), fpc_cc);
break;
case 0x1:
DIP("unorderd: %d\n", fpc_cc);
setFPUCondCode(mkexpr(t0), fpc_cc);
break;
case 0x2:
setFPUCondCode(mkexpr(t1), fpc_cc);
break;
case 0x3:
setFPUCondCode(binop(Iop_Or32, mkexpr(t0), mkexpr(t1)),
fpc_cc);
break;
case 0x4:
setFPUCondCode(mkexpr(t3), fpc_cc);
break;
case 0x5:
setFPUCondCode(binop(Iop_Or32, mkexpr(t0), mkexpr(t3)),
fpc_cc);
break;
case 0x6:
setFPUCondCode(binop(Iop_Or32, mkexpr(t3), mkexpr(t1)),
fpc_cc);
break;
case 0x7:
setFPUCondCode(mkexpr(t2), fpc_cc);
break;
case 0x8:
setFPUCondCode(mkU32(0), fpc_cc);
break;
case 0x9:
setFPUCondCode(mkexpr(t0), fpc_cc);
break;
case 0xA:
setFPUCondCode(mkexpr(t1), fpc_cc);
break;
case 0xB:
setFPUCondCode(binop(Iop_Or32, mkexpr(t0), mkexpr(t1)),
fpc_cc);
break;
case 0xC:
setFPUCondCode(mkexpr(t3), fpc_cc);
break;
case 0xD:
setFPUCondCode(binop(Iop_Or32, mkexpr(t0), mkexpr(t3)),
fpc_cc);
break;
case 0xE:
setFPUCondCode(binop(Iop_Or32, mkexpr(t3), mkexpr(t1)),
fpc_cc);
break;
case 0xF:
setFPUCondCode(mkexpr(t2), fpc_cc);
break;
default:
return False;
}
}
break;
case 0x11: //C.cond.D
DIP("C.%d.D %d f%d, f%d\n", cond, fpc_cc, fs, ft);
t0 = newTemp(Ity_I32);
t1 = newTemp(Ity_I32);
t2 = newTemp(Ity_I32);
t3 = newTemp(Ity_I32);
assign(ccIR, binop(Iop_CmpF64, getDReg(fs), getDReg(ft)));
/* Map compare result from IR to MIPS */
/*
FP cmp result | MIPS | IR
--------------------------
UN | 0x1 | 0x45
EQ | 0x2 | 0x40
GT | 0x4 | 0x00
LT | 0x8 | 0x01
*/
// ccMIPS = Shl(1, (~(ccIR>>5) & 2)
// | ((ccIR ^ (ccIR>>6)) & 1)
assign(ccMIPS, binop(Iop_Shl32, mkU32(1), unop(Iop_32to8,
binop(Iop_Or32, binop(Iop_And32, unop(Iop_Not32,
binop(Iop_Shr32, mkexpr(ccIR), mkU8(5))), mkU32(2)),
binop(Iop_And32, binop(Iop_Xor32, mkexpr(ccIR),
binop(Iop_Shr32, mkexpr(ccIR), mkU8(6))),
mkU32(1))))));
assign(t0, binop(Iop_And32, mkexpr(ccMIPS), mkU32(0x1))); // UN
assign(t1, binop(Iop_And32, binop(Iop_Shr32, mkexpr(ccMIPS),
mkU8(0x1)), mkU32(0x1))); // EQ
assign(t2, binop(Iop_And32, unop(Iop_Not32, binop(Iop_Shr32,
mkexpr(ccMIPS), mkU8(0x2))), mkU32(0x1))); // NGT
assign(t3, binop(Iop_And32, binop(Iop_Shr32, mkexpr(ccMIPS),
mkU8(0x3)), mkU32(0x1))); // LT
switch (cond) {
case 0x0:
setFPUCondCode(mkU32(0), fpc_cc);
break;
case 0x1:
DIP("unorderd: %d\n", fpc_cc);
setFPUCondCode(mkexpr(t0), fpc_cc);
break;
case 0x2:
setFPUCondCode(mkexpr(t1), fpc_cc);
break;
case 0x3:
setFPUCondCode(binop(Iop_Or32, mkexpr(t0), mkexpr(t1)),
fpc_cc);
break;
case 0x4:
setFPUCondCode(mkexpr(t3), fpc_cc);
break;
case 0x5:
setFPUCondCode(binop(Iop_Or32, mkexpr(t0), mkexpr(t3)),
fpc_cc);
break;
case 0x6:
setFPUCondCode(binop(Iop_Or32, mkexpr(t3), mkexpr(t1)),
fpc_cc);
break;
case 0x7:
setFPUCondCode(mkexpr(t2), fpc_cc);
break;
case 0x8:
setFPUCondCode(mkU32(0), fpc_cc);
break;
case 0x9:
setFPUCondCode(mkexpr(t0), fpc_cc);
break;
case 0xA:
setFPUCondCode(mkexpr(t1), fpc_cc);
break;
case 0xB:
setFPUCondCode(binop(Iop_Or32, mkexpr(t0), mkexpr(t1)),
fpc_cc);
break;
case 0xC:
setFPUCondCode(mkexpr(t3), fpc_cc);
break;
case 0xD:
setFPUCondCode(binop(Iop_Or32, mkexpr(t0), mkexpr(t3)),
fpc_cc);
break;
case 0xE:
setFPUCondCode(binop(Iop_Or32, mkexpr(t3), mkexpr(t1)),
fpc_cc);
break;
case 0xF:
setFPUCondCode(mkexpr(t2), fpc_cc);
break;
default:
return False;
}
break;
default:
return False;
}
} else {
return False;
}
return True;
}
/*------------------------------------------------------------*/
/*--- Disassemble a single instruction ---*/
/*------------------------------------------------------------*/
/* Disassemble a single instruction into IR. The instruction is
located in host memory at guest_instr, and has guest IP of
guest_PC_curr_instr, which will have been set before the call
here. */
static DisResult disInstr_MIPS_WRK ( Bool(*resteerOkFn) (/*opaque */void *,
Addr64),
Bool resteerCisOk,
void* callback_opaque,
Long delta64,
VexArchInfo* archinfo,
VexAbiInfo* abiinfo,
Bool sigill_diag )
{
IRTemp t0, t1, t2, t3, t4, t5, t6, t7, t8;
UInt opcode, cins, rs, rt, rd, sa, ft, fs, fd, fmt, tf, nd, function,
trap_code, imm, instr_index, p, msb, lsb, size, rot, sel;
DisResult dres;
static IRExpr *lastn = NULL; /* last jump addr */
static IRStmt *bstmt = NULL; /* branch (Exit) stmt */
/* The running delta */
Int delta = (Int) delta64;
/* Holds eip at the start of the insn, so that we can print
consistent error messages for unimplemented insns. */
Int delta_start = delta;
/* Are we in a delay slot ? */
Bool delay_slot_branch, likely_delay_slot, delay_slot_jump;
/* Set result defaults. */
dres.whatNext = Dis_Continue;
dres.len = 0;
dres.continueAt = 0;
dres.jk_StopHere = Ijk_INVALID;
delay_slot_branch = likely_delay_slot = delay_slot_jump = False;
UChar *code = (UChar *) (guest_code + delta);
cins = getUInt(code);
if (delta != 0) {
if (branch_or_jump(guest_code + delta - 4)) {
if (lastn == NULL && bstmt == NULL) {
DIP("Info: jump to delay slot insn...\n");
} else {
dres.whatNext = Dis_StopHere;
DIP("lastn = %p bstmt = %p\n", lastn, bstmt);
if (lastn != NULL) {
DIP("delay slot jump\n");
if (vex_traceflags & VEX_TRACE_FE)
ppIRExpr(lastn);
delay_slot_jump = True;
} else if (bstmt != NULL) {
DIP("\ndelay slot branch\n");
delay_slot_branch = True;
}
DIP("delay slot\n");
}
}
if (branch_or_link_likely(guest_code + delta - 4)) {
likely_delay_slot = True;
}
}
/* Spot "Special" instructions (see comment at top of file). */
{
/* Spot the 16-byte preamble:
****mips32****
"srl $0, $0, 13
"srl $0, $0, 29
"srl $0, $0, 3
"srl $0, $0, 19 */
UInt word1 = 0x00000342;
UInt word2 = 0x00000742;
UInt word3 = 0x000000C2;
UInt word4 = 0x000004C2;
if (getUInt(code + 0) == word1 && getUInt(code + 4) == word2 &&
getUInt(code + 8) == word3 && getUInt(code + 12) == word4) {
/* Got a "Special" instruction preamble. Which one is it? */
if (getUInt(code + 16) == 0x01ad6825 /* or t5, t5, t5 */ ) {
/* v0 = client_request ( t9 ) */
DIP("v0 = client_request ( t9 )\n");
putPC(mkU32(guest_PC_curr_instr + 20));
dres.jk_StopHere = Ijk_ClientReq;
dres.whatNext = Dis_StopHere;
goto decode_success;
} else if (getUInt(code + 16) == 0x01ce7025 /* or t6,t6,t6 */ ) {
/* t9 = guest_NRADDR */
DIP("t9 = guest_NRADDR\n");
dres.len = 20;
delta += 20;
putIReg(11, IRExpr_Get(offsetof(VexGuestMIPS32State, guest_NRADDR),
Ity_I32));
goto decode_success;
} else if (getUInt(code + 16) == 0x01ef7825/* or t7,t7,t7 */ ) {
/* branch-and-link-to-noredir t9 */
DIP("branch-and-link-to-noredir t9\n");
putIReg(31, mkU32(guest_PC_curr_instr + 20));
putPC(getIReg(25));
dres.jk_StopHere = Ijk_NoRedir;
dres.whatNext = Dis_StopHere;
goto decode_success;
} else if (getUInt(code + 16) == 0x016b5825/* or t3,t3,t3 */ ) {
/* IR injection */
DIP("IR injection\n");
#if defined (_MIPSEL)
vex_inject_ir(irsb, Iend_LE);
#elif defined (_MIPSEB)
vex_inject_ir(irsb, Iend_BE);
#endif
stmt(IRStmt_Put(offsetof(VexGuestMIPS32State, guest_TISTART),
mkU32(guest_PC_curr_instr)));
stmt(IRStmt_Put(offsetof(VexGuestMIPS32State, guest_TILEN),
mkU32(20)));
putPC(mkU32(guest_PC_curr_instr + 20));
dres.whatNext = Dis_StopHere;
dres.jk_StopHere = Ijk_TInval;
dres.len = 20;
delta += 20;
goto decode_success;
}
/* We don't know what it is. Set opc1/opc2 so decode_failure
can print the insn following the Special-insn preamble. */
delta += 16;
goto decode_failure;
/*NOTREACHED*/}
}
opcode = get_opcode(cins);
imm = get_imm(cins);
rs = get_rs(cins);
rt = get_rt(cins);
rd = get_rd(cins);
sa = get_sa(cins);
fs = get_fs(cins);
fd = get_fd(cins);
ft = get_ft(cins);
tf = get_tf(cins);
nd = get_nd(cins);
sel = get_sel(cins);
fmt = get_fmt(cins);
instr_index = get_instr_index(cins);
trap_code = get_code(cins);
function = get_function(cins);
IRType ty = mode64 ? Ity_I64 : Ity_I32;
IRType tyF = mode64 ? Ity_F64 : Ity_F32;
DIP("[cins = 0x%08x] ", cins);
switch (opcode) {
case 0x03: /* JAL */
DIP("jal 0x%x", instr_index);
putIReg(31, mkU32(guest_PC_curr_instr + 8));
t0 = newTemp(ty);
assign(t0, mkU32((guest_PC_curr_instr & 0xF0000000) |
(instr_index << 2)));
lastn = mkexpr(t0);
break;
case 0x02: /* J */
DIP("j 0x%x", instr_index);
t0 = newTemp(ty);
assign(t0, mkU32((guest_PC_curr_instr & 0xF0000000) |
(instr_index << 2)));
lastn = mkexpr(t0);
break;
case 0x11: /* COP1 */
{
UInt bc1_cc = get_bc1_cc(cins);
if (0x08 == fmt) {
switch (fmt) {
case 0x08: //BC
{
DIP("tf: %d, nd: %d\n", tf, nd);
//FcConditionalCode(bc1_cc)
t1 = newTemp(Ity_I32);
t2 = newTemp(Ity_I32);
t3 = newTemp(Ity_I1);
assign(t1, unop(Iop_1Sto32, binop(Iop_CmpEQ32, mkU32(0),
mkU32(bc1_cc))));
assign(t2, IRExpr_Mux0X(unop(Iop_32to8, mkexpr(t1)),
binop(Iop_And32, binop(Iop_Shr32, getFCSR(),
mkU8(24 + bc1_cc)), mkU32(0x1)), binop(Iop_And32,
binop(Iop_Shr32, getFCSR(), mkU8(23)),
mkU32(0x1))));
if (tf == 1 && nd == 0) {
//branch on true
DIP("bc1t %d, %d", bc1_cc, imm);
assign(t3, binop(Iop_CmpEQ32, mkU32(1), mkexpr(t2)));
dis_branch(False, mkexpr(t3), imm, &bstmt);
break;
} else if (tf == 0 && nd == 0) {
//branch on false
DIP("bc1f %d, %d", bc1_cc, imm);
assign(t3, binop(Iop_CmpEQ32, mkU32(0), mkexpr(t2)));
dis_branch(False, mkexpr(t3), imm, &bstmt);
break;
} else if (nd == 1 && tf == 0) {
DIP("bc1fl %d, %d", bc1_cc, imm);
lastn = dis_branch_likely(binop(Iop_CmpNE32, mkexpr(t2),
mode64 ? mkU64(0x0) : mkU32(0x0)), imm);
break;
} else if (nd == 1 && tf == 1) {
DIP("bc1tl %d, %d", bc1_cc, imm);
lastn = dis_branch_likely(binop(Iop_CmpEQ32, mkexpr(t2),
mkU32(0x0)), imm);
break;
} else
goto decode_failure;
}
default:
goto decode_failure;
}
} else {
switch (function) {
case 0x4: //SQRT.fmt
{
switch (fmt) {
case 0x10: //S
{
IRExpr *rm = get_IR_roundingmode();
putFReg(fd, mkWidenFromF32(tyF, binop(Iop_SqrtF32, rm,
getLoFromF64(tyF, getFReg(fs)))));
}
break;
case 0x11: //D
{
IRExpr *rm = get_IR_roundingmode();
putDReg(fd, binop(Iop_SqrtF64, rm, getDReg(fs)));
}
break;
}
}
break;
case 0x5: //abs.fmt
switch (fmt) {
case 0x10: //S
DIP("abs.s f%d, f%d\n", fd, fs);
putFReg(fd, mkWidenFromF32(tyF, unop(Iop_AbsF32,
getLoFromF64(tyF, getFReg(fs)))));
break;
case 0x11: //D
DIP("abs.d f%d, f%d\n", fd, fs);
putDReg(fd, unop(Iop_AbsF64, getDReg(fs)));
break;
default:
goto decode_failure;
}
break; //case 0x5
case 0x02: // MUL.fmt
switch (fmt) {
case 0x11: // D
{
DIP("mul.d f%d, f%d, f%d", fd, fs, ft);
IRExpr *rm = get_IR_roundingmode();
putDReg(fd, triop(Iop_MulF64, rm, getDReg(fs),
getDReg(ft)));
break;
}
case 0x10: // S
{
DIP("mul.s f%d, f%d, f%d", fd, fs, ft);
IRExpr *rm = get_IR_roundingmode();
putFReg(fd, mkWidenFromF32(tyF, triop(Iop_MulF32, rm,
getLoFromF64(tyF, getFReg(fs)),
getLoFromF64(tyF, getFReg(ft)))));
break;
}
default:
goto decode_failure;
}
break; // MUL.fmt
case 0x03: // DIV.fmt
switch (fmt) {
case 0x11: // D
{
DIP("div.d f%d, f%d, f%d", fd, fs, ft);
IRExpr *rm = get_IR_roundingmode();
putDReg(fd, triop(Iop_DivF64, rm, getDReg(fs),
getDReg(ft)));
break;
}
case 0x10: // S
{
DIP("div.s f%d, f%d, f%d", fd, fs, ft);
IRExpr *rm = get_IR_roundingmode();
putFReg(fd, mkWidenFromF32(tyF, triop(Iop_DivF32, rm,
getLoFromF64(tyF, getFReg(fs)),
getLoFromF64(tyF, getFReg(ft)))));
break;
}
default:
goto decode_failure;
}
break; // DIV.fmt
case 0x01: // SUB.fmt
switch (fmt) {
case 0x11: // D
{
DIP("sub.d f%d, f%d, f%d", fd, fs, ft);
IRExpr *rm = get_IR_roundingmode();
putDReg(fd, triop(Iop_SubF64, rm, getDReg(fs), getDReg(ft)));
break;
}
case 0x10: // S
{
DIP("sub.s f%d, f%d, f%d", fd, fs, ft);
IRExpr *rm = get_IR_roundingmode();
putFReg(fd, mkWidenFromF32(tyF, triop(Iop_SubF32, rm,
getLoFromF64(tyF, getFReg(fs)),
getLoFromF64(tyF, getFReg(ft)))));
break;
}
default:
goto decode_failure;
}
break; // SUB.fmt
case 0x06: // MOV.fmt
switch (fmt) {
case 0x11: // D
/* TODO: Check this for 64 bit FPU registers. */
DIP("mov.d f%d, f%d", fd, fs);
putFReg(fd, getFReg(fs));
putFReg(fd + 1, getFReg(fs + 1));
break;
case 0x10: // S
DIP("mov.s f%d, f%d", fd, fs);
putFReg(fd, getFReg(fs));
break;
default:
goto decode_failure;
}
break; // MOV.fmt
case 0x7: //neg.fmt
switch (fmt) {
case 0x10: //S
DIP("neg.s f%d, f%d", fd, fs);
putFReg(fd, mkWidenFromF32(tyF, unop(Iop_NegF32,
getLoFromF64(tyF, getFReg(fs)))));
break;
case 0x11: //D
DIP("neg.d f%d, f%d", fd, fs);
putDReg(fd, unop(Iop_NegF64, getDReg(fs)));
break;
default:
goto decode_failure;
}
break; //case 0x7
case 0x15: //RECIP.fmt
switch (fmt) {
case 0x10:
{ //S
DIP("recip.s f%d, f%d\n", fd, fs);
IRExpr *rm = get_IR_roundingmode();
putFReg(fd, mkWidenFromF32(tyF, triop(Iop_DivF32,
rm, unop(Iop_ReinterpI32asF32,
mkU32(0x3F800000)), getLoFromF64(tyF,
getFReg(fs)))));
break;
}
case 0x11:
{ //D
DIP("recip.d f%d, f%d\n", fd, fs);
#if defined (_MIPSEL)
IRExpr *rm = get_IR_roundingmode();
putDReg(fd, triop(Iop_DivF64, rm,
unop(Iop_ReinterpI64asF64,
mkU64(0x3FF0000000000000ULL)), getDReg(fs)));
#elif defined (_MIPSEB)
IRExpr *rm = get_IR_roundingmode();
putDReg(fd, triop(Iop_DivF64, rm,
unop(Iop_ReinterpI64asF64,
mkU64(0x000000003FF00000ULL)), getDReg(fs)));
#endif
break;
}
default:
goto decode_failure;
}
break; //case 0x15
case 0x13: //MOVN.fmt
switch (fmt) {
case 0x10: // S
DIP("movn.s f%d, f%d, r%d", fd, fs, rt);
t1 = newTemp(Ity_F64);
t2 = newTemp(Ity_F64);
t3 = newTemp(Ity_I32);
t4 = newTemp(Ity_F64);
assign(t1, unop(Iop_F32toF64, getFReg(fs)));
assign(t2, unop(Iop_F32toF64, getFReg(fd)));
assign(t3, unop(Iop_1Sto32, binop(Iop_CmpNE32, mkU32(0),
getIReg(rt))));
assign(t4, IRExpr_Mux0X(unop(Iop_32to8, mkexpr(t3)),
mkexpr(t2), mkexpr(t1)));
putFReg(fd, binop(Iop_F64toF32, get_IR_roundingmode(),
mkexpr(t4)));
break;
case 0x11: // D
DIP("movn.d f%d, f%d, r%d", fd, fs, rt);
t3 = newTemp(Ity_I32);
t4 = newTemp(Ity_F64);
assign(t3, unop(Iop_1Sto32, binop(Iop_CmpNE32, mkU32(0),
getIReg(rt))));
putDReg(fd, IRExpr_Mux0X(unop(Iop_32to8, mkexpr(t3)),
getDReg(fd), getDReg(fs)));
break;
default:
goto decode_failure;
}
break; // MOVN.fmt
case 0x12: //MOVZ.fmt
switch (fmt) {
case 0x10: // S
DIP("movz.s f%d, f%d, r%d", fd, fs, rt);
t1 = newTemp(Ity_F64);
t2 = newTemp(Ity_F64);
t3 = newTemp(Ity_I32);
t4 = newTemp(Ity_F64);
assign(t1, unop(Iop_F32toF64, getFReg(fs)));
assign(t2, unop(Iop_F32toF64, getFReg(fd)));
assign(t3, unop(Iop_1Sto32, binop(Iop_CmpEQ32, mkU32(0),
getIReg(rt))));
assign(t4, IRExpr_Mux0X(unop(Iop_32to8, mkexpr(t3)),
mkexpr(t2), mkexpr(t1)));
putFReg(fd, binop(Iop_F64toF32, get_IR_roundingmode(),
mkexpr(t4)));
break;
case 0x11: // D
DIP("movz.d f%d, f%d, r%d", fd, fs, rt);
t3 = newTemp(Ity_I32);
t4 = newTemp(Ity_F64);
assign(t3, unop(Iop_1Sto32, binop(Iop_CmpEQ32, mkU32(0),
getIReg(rt))));
putDReg(fd, IRExpr_Mux0X(unop(Iop_32to8, mkexpr(t3)),
getDReg(fd), getDReg(fs)));
break;
default:
goto decode_failure;
}
break; // MOVZ.fmt
case 0x11: // MOVT.fmt
if (tf == 1) {
UInt mov_cc = get_mov_cc(cins);
switch (fmt) // MOVCF = 010001
{
case 0x11: // D
DIP("movt.d f%d, f%d, %d", fd, fs, mov_cc);
t1 = newTemp(Ity_I32);
t2 = newTemp(Ity_I32);
t3 = newTemp(Ity_I32);
t4 = newTemp(Ity_F64);
assign(t1, unop(Iop_1Sto32, binop(Iop_CmpEQ32, mkU32(0),
mkU32(mov_cc))));
assign(t2, IRExpr_Mux0X(unop(Iop_32to8, mkexpr(t1)),
binop(Iop_And32, binop(Iop_Shr32, getFCSR(),
mkU8(24 + mov_cc)), mkU32(0x1)),
binop(Iop_And32, binop(Iop_Shr32, getFCSR(),
mkU8(23)), mkU32(0x1))));
assign(t3, unop(Iop_1Sto32, binop(Iop_CmpEQ32, mkU32(1),
mkexpr(t2))));
assign(t4, IRExpr_Mux0X(unop(Iop_32to8, mkexpr(t3)),
getDReg(fs), getDReg(fd)));
putDReg(fd, mkexpr(t4));
break;
case 0x10: // S
DIP("movt.s f%d, f%d, %d", fd, fs, mov_cc);
t1 = newTemp(Ity_I32);
t2 = newTemp(Ity_I32);
t3 = newTemp(Ity_I32);
t4 = newTemp(Ity_F64);
t5 = newTemp(Ity_F64);
t6 = newTemp(Ity_F64);
t7 = newTemp(Ity_I64);
assign(t5, unop(Iop_F32toF64, getFReg(fs)));
assign(t6, unop(Iop_F32toF64, getFReg(fd)));
assign(t1, unop(Iop_1Sto32, binop(Iop_CmpEQ32, mkU32(0),
mkU32(mov_cc))));
assign(t2, IRExpr_Mux0X(unop(Iop_32to8, mkexpr(t1)),
binop(Iop_And32, binop(Iop_Shr32,
getFCSR(), mkU8(24 + mov_cc)),
mkU32(0x1)), binop(Iop_And32,
binop(Iop_Shr32, getFCSR(),
mkU8(23)), mkU32(0x1))));
assign(t3, unop(Iop_1Sto32, binop(Iop_CmpEQ32, mkU32(1),
mkexpr(t2))));
assign(t4, IRExpr_Mux0X(unop(Iop_32to8, mkexpr(t3)),
mkexpr(t5), mkexpr(t6)));
putFReg(fd, binop(Iop_F64toF32, get_IR_roundingmode(),
mkexpr(t4)));
break;
default:
goto decode_failure;
}
} else if (tf == 0) //movf.fmt
{
UInt mov_cc = get_mov_cc(cins);
switch (fmt) // MOVCF = 010001
{
case 0x11: // D
DIP("movf.d f%d, f%d, %d", fd, fs, mov_cc);
t1 = newTemp(Ity_I32);
t2 = newTemp(Ity_I32);
t3 = newTemp(Ity_I32);
t4 = newTemp(Ity_F64);
assign(t1, unop(Iop_1Sto32, binop(Iop_CmpEQ32,
mkU32(0), mkU32(mov_cc))));
assign(t2, IRExpr_Mux0X(unop(Iop_32to8, mkexpr(t1)),
binop(Iop_And32, binop(Iop_Shr32, getFCSR(),
mkU8(24 + mov_cc)), mkU32(0x1)),
binop(Iop_And32, binop(Iop_Shr32, getFCSR(),
mkU8(23)), mkU32(0x1))));
assign(t3, unop(Iop_1Sto32, binop(Iop_CmpEQ32, mkU32(1),
mkexpr(t2))));
assign(t4, IRExpr_Mux0X(unop(Iop_32to8, mkexpr(t3)),
getDReg(fd), getDReg(fs)));
putDReg(fd, mkexpr(t4));
break;
case 0x10: // S
DIP("movf.s f%d, f%d, %d", fd, fs, mov_cc);
{
t1 = newTemp(Ity_I32);
t2 = newTemp(Ity_I32);
t3 = newTemp(Ity_I32);
t4 = newTemp(Ity_F64);
t5 = newTemp(Ity_F64);
t6 = newTemp(Ity_F64);
assign(t5, unop(Iop_F32toF64, getFReg(fs)));
assign(t6, unop(Iop_F32toF64, getFReg(fd)));
assign(t1, unop(Iop_1Sto32, binop(Iop_CmpEQ32, mkU32(0),
mkU32(mov_cc))));
assign(t2, IRExpr_Mux0X(unop(Iop_32to8, mkexpr(t1)),
binop(Iop_And32, binop(Iop_Shr32, getFCSR(),
mkU8(24 + mov_cc)), mkU32(0x1)),
binop(Iop_And32, binop(Iop_Shr32, getFCSR(),
mkU8(23)), mkU32(0x1))));
assign(t3, unop(Iop_1Sto32, binop(Iop_CmpEQ32, mkU32(1),
mkexpr(t2))));
assign(t4, IRExpr_Mux0X(unop(Iop_32to8, mkexpr(t3)),
mkexpr(t6), mkexpr(t5)));
putFReg(fd, binop(Iop_F64toF32, get_IR_roundingmode(),
mkexpr(t4)));
}
break;
default:
goto decode_failure;
}
}
break; // MOVT.fmt
case 0x0: //add.fmt
switch (fmt) {
case 0x10: //S
{
DIP("add.s f%d, f%d, f%d\n", fd, fs, ft);
IRExpr *rm = get_IR_roundingmode();
putFReg(fd, mkWidenFromF32(tyF, triop(Iop_AddF32, rm,
getLoFromF64(tyF, getFReg(fs)),
getLoFromF64(tyF, getFReg(ft)))));
break;
}
case 0x11: //D
{
DIP("add.d f%d, f%d, f%d\n", fd, fs, ft);
IRExpr *rm = get_IR_roundingmode();
putDReg(fd, triop(Iop_AddF64, rm, getDReg(fs),
getDReg(ft)));
break;
}
case 0x4: //MTC1 (Move Word to Floating Point)
DIP("mtc1 r%d, f%d", rt, fs);
putFReg(fs, unop(Iop_ReinterpI32asF32, getIReg(rt)));
break;
case 0x0: //MFC1
DIP("mfc1 r%d, f%d", rt, fs);
putIReg(rt, unop(Iop_ReinterpF32asI32, getFReg(fs)));
break;
case 0x6: //CTC1
DIP("ctc1 r%d, f%d", rt, fs);
t0 = newTemp(Ity_I32);
t1 = newTemp(Ity_I32);
t2 = newTemp(Ity_I32);
t3 = newTemp(Ity_I32);
t4 = newTemp(Ity_I32);
t5 = newTemp(Ity_I32);
t6 = newTemp(Ity_I32);
assign(t0, mkNarrowTo32(ty, getIReg(rt)));
if (fs == 25) { //FCCR
assign(t1, binop(Iop_Shl32, binop(Iop_And32, mkexpr(t0),
mkU32(0x000000FE)), mkU8(24)));
assign(t2, binop(Iop_And32, mkexpr(t0),
mkU32(0x01000000)));
assign(t3, binop(Iop_Shl32, binop(Iop_And32, mkexpr(t0),
mkU32(0x00000001)), mkU8(23)));
assign(t4, binop(Iop_And32, mkexpr(t0),
mkU32(0x007FFFFF)));
putFCSR(binop(Iop_Or32, binop(Iop_Or32, mkexpr(t1),
mkexpr(t2)), binop(Iop_Or32, mkexpr(t3),
mkexpr(t4))));
} else if (fs == 26) { //FEXR
assign(t1, binop(Iop_And32, getFCSR(), mkU32(0xFFFC0000)));
assign(t2, binop(Iop_And32, mkexpr(t0),
mkU32(0x0003F000)));
assign(t3, binop(Iop_And32, getFCSR(), mkU32(0x00000F80)));
assign(t4, binop(Iop_And32, mkexpr(t0),
mkU32(0x0000007C)));
assign(t5, binop(Iop_And32, getFCSR(), mkU32(0x00000003)));
putFCSR(binop(Iop_Or32, binop(Iop_Or32, binop(Iop_Or32,
mkexpr(t1), mkexpr(t2)), binop(Iop_Or32,
mkexpr(t3), mkexpr(t4))), mkexpr(t5)));
} else if (fs == 28) {
assign(t1, binop(Iop_And32, getFCSR(), mkU32(0xFE000000)));
assign(t2, binop(Iop_Shl32, binop(Iop_And32, mkexpr(t0),
mkU32(0x00000002)), mkU8(22)));
assign(t3, binop(Iop_And32, getFCSR(), mkU32(0x00FFF000)));
assign(t4, binop(Iop_And32, mkexpr(t0),
mkU32(0x00000F80)));
assign(t5, binop(Iop_And32, getFCSR(), mkU32(0x0000007C)));
assign(t6, binop(Iop_And32, mkexpr(t0),
mkU32(0x00000003)));
putFCSR(binop(Iop_Or32, binop(Iop_Or32, binop(Iop_Or32,
mkexpr(t1), mkexpr(t2)), binop(Iop_Or32,
mkexpr(t3), mkexpr(t4))), binop(Iop_Or32,
mkexpr(t5), mkexpr(t6))));
} else if (fs == 31) {
putFCSR(mkexpr(t0));
}
break;
case 0x2: //CFC1
DIP("cfc1 r%d, f%d", rt, fs);
t0 = newTemp(Ity_I32);
t1 = newTemp(Ity_I32);
t2 = newTemp(Ity_I32);
t3 = newTemp(Ity_I32);
t4 = newTemp(Ity_I32);
t5 = newTemp(Ity_I32);
t6 = newTemp(Ity_I32);
assign(t0, getFCSR());
if (fs == 0) {
putIReg(rt, mkWidenFrom32(ty,
IRExpr_Get(offsetof(VexGuestMIPS32State,
guest_FIR),
Ity_I32),
False));
} else if (fs == 25) {
assign(t1, mkU32(0x000000FF));
assign(t2, binop(Iop_Shr32, binop(Iop_And32, mkexpr(t0),
mkU32(0xFE000000)), mkU8(25)));
assign(t3, binop(Iop_Shr32, binop(Iop_And32, mkexpr(t0),
mkU32(0x00800000)), mkU8(23)));
putIReg(rt, mkWidenFrom32(ty, binop(Iop_Or32,
binop(Iop_Or32, mkexpr(t1), mkexpr(t2)),
mkexpr(t3)), False));
} else if (fs == 26) {
assign(t1, mkU32(0xFFFFF07C));
assign(t2, binop(Iop_And32, mkexpr(t0),
mkU32(0x0003F000)));
assign(t3, binop(Iop_And32, mkexpr(t0),
mkU32(0x0000007C)));
putIReg(rt, mkWidenFrom32(ty, binop(Iop_Or32,
binop(Iop_Or32, mkexpr(t1), mkexpr(t2)),
mkexpr(t3)), False));
} else if (fs == 28) {
assign(t1, mkU32(0x00000F87));
assign(t2, binop(Iop_And32, mkexpr(t0),
mkU32(0x00000F83)));
assign(t3, binop(Iop_Shr32, binop(Iop_And32, mkexpr(t0),
mkU32(0x01000000)), mkU8(22)));
putIReg(rt, mkWidenFrom32(ty, binop(Iop_Or32,
binop(Iop_Or32, mkexpr(t1), mkexpr(t2)),
mkexpr(t3)), False));
} else if (fs == 31) {
putIReg(rt, mkWidenFrom32(ty, getFCSR(), False));
}
break;
default:
goto decode_failure;
}
break; //case 0x0: //add.fmt
case 0x21: //CVT.D
switch (fmt) {
case 0x10: //S
DIP("cvt.d.s f%d, f%d", fd, fs);
putDReg(fd, unop(Iop_F32toF64, getFReg(fs)));
break;
case 0x14:
{ //W
DIP("cvt.d.w %d, %d\n", fd, fs);
t0 = newTemp(Ity_I32);
assign(t0, unop(Iop_ReinterpF32asI32, getFReg(fs)));
putDReg(fd, unop(Iop_I32StoF64, mkexpr(t0)));
}
break;
default:
goto decode_failure;
}
break; //CVT.D
case 0x20: //cvt.s
switch (fmt) {
case 0x14: //W
DIP("cvt.s.w %d, %d\n", fd, fs);
t0 = newTemp(Ity_I32);
assign(t0, unop(Iop_ReinterpF32asI32, getFReg(fs)));
putFReg(fd, binop(Iop_I32StoF32, get_IR_roundingmode(),
mkexpr(t0)));
break;
case 0x11: //D
DIP("cvt.s.d %d, %d\n", fd, fs);
putFReg(fd, binop(Iop_F64toF32, get_IR_roundingmode(),
getDReg(fs)));
break;
default:
goto decode_failure;
}
break; //cvt.s
case 0x24: //cvt.w
switch (fmt) {
case 0x10: //S
DIP("cvt.w.s %d, %d\n", fd, fs);
putFReg(fd, binop(Iop_RoundF32toInt, get_IR_roundingmode(),
getFReg(fs)));
break;
case 0x11:
{ //D
DIP("cvt.w.d %d, %d\n", fd, fs);
t0 = newTemp(Ity_I32);
assign(t0, binop(Iop_F64toI32S, get_IR_roundingmode(),
getDReg(fs)));
putFReg(fd, unop(Iop_ReinterpI32asF32, mkexpr(t0)));
}
break;
default:
goto decode_failure;
}
break;
case 0x09: //TRUNC.L
switch (fmt) {
case 0x10: //S
DIP("trunc.l.s %d, %d\n", fd, fs);
goto decode_failure;
case 0x11: //D
DIP("trunc.l.d %d, %d\n", fd, fs);
goto decode_failure;
default:
goto decode_failure;
}
break; //trunc.l
case 0x0C: //ROUND.W.fmt
switch (fmt) {
case 0x10: //S
DIP("round.w.s f%d, f%d\n", fd, fs);
putFReg(fd, binop(Iop_RoundF32toInt, mkU32(0x0),
getFReg(fs)));
break;
case 0x11: //D
DIP("round.w.d f%d, f%d\n", fd, fs);
t0 = newTemp(Ity_I32);
assign(t0, binop(Iop_F64toI32S, mkU32(0x0), getDReg(fs)));
putFReg(fd, unop(Iop_ReinterpI32asF32, mkexpr(t0)));
break;
default:
goto decode_failure;
}
break; //ROUND.W.fmt
case 0x0F: //FLOOR.W.fmt
switch (fmt) {
case 0x10: //S
DIP("floor.w.s f%d, f%d\n", fd, fs);
putFReg(fd, binop(Iop_RoundF32toInt, mkU32(0x1),
getFReg(fs)));
break;
case 0x11: //D
DIP("floor.w.d f%d, f%d\n", fd, fs);
t0 = newTemp(Ity_I32);
assign(t0, binop(Iop_F64toI32S, mkU32(0x1), getDReg(fs)));
putFReg(fd, unop(Iop_ReinterpI32asF32, mkexpr(t0)));
break;
default:
goto decode_failure;
}
break; //FLOOR.W.fmt
case 0x0D: //TRUNC.W
switch (fmt) {
case 0x10: //S
DIP("trunc.w.s %d, %d\n", fd, fs);
putFReg(fd, binop(Iop_RoundF32toInt, mkU32(0x3),
getFReg(fs)));
break;
case 0x11: //D
DIP("trunc.w.d %d, %d\n", fd, fs);
t0 = newTemp(Ity_I32);
assign(t0, binop(Iop_F64toI32S, mkU32(0x3), getDReg(fs)));
putFReg(fd, unop(Iop_ReinterpI32asF32, mkexpr(t0)));
break;
default:
goto decode_failure;
}
break;
case 0x0E: //CEIL.W.fmt
switch (fmt) {
case 0x10: //S
DIP("ceil.w.s %d, %d\n", fd, fs);
putFReg(fd, binop(Iop_RoundF32toInt, mkU32(0x2),
getFReg(fs)));
break;
case 0x11: //D
DIP("ceil.w.d %d, %d\n", fd, fs);
t0 = newTemp(Ity_I32);
assign(t0, binop(Iop_F64toI32S, mkU32(0x2), getDReg(fs)));
putFReg(fd, unop(Iop_ReinterpI32asF32, mkexpr(t0)));
break;
default:
goto decode_failure;
}
break;
case 0x0A: //CEIL.L.fmt
switch (fmt) {
case 0x10: //S
DIP("ceil.l.s %d, %d\n", fd, fs);
goto decode_failure;
case 0x11: //D
DIP("ceil.l.d %d, %d\n", fd, fs);
goto decode_failure;
default:
goto decode_failure;
}
break;
case 0x16: //RSQRT.fmt
switch (fmt) {
case 0x10:
{ //S
DIP("rsqrt.s %d, %d\n", fd, fs);
IRExpr *rm = get_IR_roundingmode();
putFReg(fd, mkWidenFromF32(tyF, triop(Iop_DivF32, rm,
unop(Iop_ReinterpI32asF32, mkU32(0x3F800000)),
binop(Iop_SqrtF32, rm, getLoFromF64(tyF,
getFReg(fs))))));
break;
}
case 0x11:
{ //D
DIP("rsqrt.d %d, %d\n", fd, fs);
IRExpr *rm = get_IR_roundingmode();
putDReg(fd, triop(Iop_DivF64, rm,
unop(Iop_ReinterpI64asF64,
mkU64(0x3FF0000000000000ULL)),
binop(Iop_SqrtF64, rm, getDReg(fs))));
break;
}
default:
goto decode_failure;
}
break;
default:
if (dis_instr_CCondFmt(cins))
break;
goto decode_failure;
}
}
}
break; /*COP1 */
case 0x10: /* COP0 */
if (rs == 0) { /* MFC0 */
DIP("mfc0 r%d, r%d, %d", rt, rd, sel);
IRTemp val = newTemp(Ity_I32);
IRExpr** args = mkIRExprVec_2 (mkU32(rd), mkU32(sel));
IRDirty *d = unsafeIRDirty_1_N(val,
0,
"mips32_dirtyhelper_mfc0",
&mips32_dirtyhelper_mfc0,
args);
stmt(IRStmt_Dirty(d));
putIReg(rt, mkexpr(val));
} else
goto decode_failure;
break;
case 0x31: /* LWC1 */
/* Load Word to Floating Point - LWC1 (MIPS32) */
LOAD_STORE_PATTERN;
putFReg(ft, load(Ity_F32, mkexpr(t1)));
DIP("lwc1 f%d, %d(r%d)", ft, imm, rs);
break;
case 0x39: /* SWC1 */
LOAD_STORE_PATTERN;
store(mkexpr(t1), getFReg(ft));
DIP("swc1 f%d, %d(r%d)", ft, imm, rs);
break;
case 0x33: /* PREF */
DIP("pref");
break;
case 0x35:
/* Load Doubleword to Floating Point - LDC1 (MIPS32) */
LOAD_STORE_PATTERN;
putDReg(ft, load(Ity_F64, mkexpr(t1)));
DIP("ldc1 f%d, %d(%d) \n", rt, imm, rs);
break;
case 0x3D:
/* Store Doubleword from Floating Point - SDC1 */
LOAD_STORE_PATTERN;
store(mkexpr(t1), getDReg(ft));
DIP("sdc1 f%d, %d(%d)", ft, imm, rs);
break;
case 0x23: /* LW */
DIP("lw r%d, %d(r%d)", rt, imm, rs);
LOAD_STORE_PATTERN;
putIReg(rt, mkWidenFrom32(ty, load(Ity_I32, mkexpr(t1)), True));
break;
case 0x20: /* LB */
DIP("lb r%d, %d(r%d)", rt, imm, rs);
LOAD_STORE_PATTERN;
putIReg(rt, unop(Iop_8Sto32, load(Ity_I8, mkexpr(t1))));
break;
case 0x24: /* LBU */
DIP("lbu r%d, %d(r%d)", rt, imm, rs);
LOAD_STORE_PATTERN;
putIReg(rt, unop(Iop_8Uto32, load(Ity_I8, mkexpr(t1))));
break;
case 0x21: /* LH */
DIP("lh r%d, %d(r%d)", rt, imm, rs);
LOAD_STORE_PATTERN;
putIReg(rt, unop(Iop_16Sto32, load(Ity_I16, mkexpr(t1))));
break;
case 0x25: /* LHU */
DIP("lhu r%d, %d(r%d)", rt, imm, rs);
LOAD_STORE_PATTERN;
putIReg(rt, unop(Iop_16Uto32, load(Ity_I16, mkexpr(t1))));
break;
case 0x0F: /* LUI */
p = (imm << 16);
DIP("lui rt: %d, imm: %d, imm << 16: %d", rt, imm, p);
if ((vex_traceflags & VEX_TRACE_FE) && !mode64)
ppIRExpr(mkU32(p));
putIReg(rt, mkU32(p));
break;
case 0x13: /* COP1X */
switch (function) {
case 0x0: { /* LWXC1 */
/* Load Word Indexed to Floating Point - LWXC1 (MIPS32r2) */
DIP("lwxc1 f%d, r%d(r%d) \n", fd, rt, rs);
t0 = newTemp(Ity_I32);
assign(t0, binop(Iop_Add32, getIReg(rs), getIReg(rt)));
putFReg(fd, load(Ity_F32, mkexpr(t0)));
break;
}
case 0x1: { /* LDXC1 */
/* Load Doubleword Indexed to Floating Point - LDXC1 (MIPS32r2) */
t0 = newTemp(Ity_I32);
assign(t0, binop(Iop_Add32, getIReg(rs), getIReg(rt)));
t1 = newTemp(Ity_I32);
assign(t1, binop(Iop_Add32, mkexpr(t0), mkU32(4)));
#if defined (_MIPSEL)
putFReg(fd, load(Ity_F32, mkexpr(t0)));
putFReg(fd + 1, load(Ity_F32, mkexpr(t1)));
#elif defined (_MIPSEB)
putFReg(fd + 1, load(Ity_F32, mkexpr(t0)));
putFReg(fd, load(Ity_F32, mkexpr(t1)));
#endif
DIP("ldxc1 f%d, r%d(r%d) \n", fd, rt, rs);
break;
}
case 0x5: // Load Doubleword Indexed Unaligned
// to Floating Point - LUXC1; MIPS32r2
DIP("luxc1 f%d, r%d(r%d) \n", fd, rt, rs);
t0 = newTemp(Ity_I64);
t1 = newTemp(Ity_I64);
assign(t0, binop(Iop_Add64, getIReg(rs), getIReg(rt)));
assign(t1, binop(Iop_And64, mkexpr(t0), mkU64(0xfffffffffffffff8ULL)));
putFReg(fd, load(Ity_F64, mkexpr(t1)));
break;
case 0x8: { /* SWXC1 */
/* Store Word Indexed from Floating Point - SWXC1 */
t0 = newTemp(Ity_I32);
assign(t0, binop(Iop_Add32, getIReg(rs), getIReg(rt)));
store(mkexpr(t0), getFReg(fs));
DIP("swxc1 f%d, r%d(r%d)", ft, rt, rs);
break;
}
case 0x9: { /* SDXC1 */
/* Store Doubleword Indexed from Floating Point - SDXC1 */
t0 = newTemp(Ity_I32);
assign(t0, binop(Iop_Add32, getIReg(rs), getIReg(rt)));
t1 = newTemp(Ity_I32);
assign(t1, binop(Iop_Add32, mkexpr(t0), mkU32(4)));
#if defined (_MIPSEL)
store(mkexpr(t0), getFReg(fs));
store(mkexpr(t1), getFReg(fs + 1));
#elif defined (_MIPSEB)
store(mkexpr(t0), getFReg(fs + 1));
store(mkexpr(t1), getFReg(fs));
#endif
DIP("sdxc1 f%d, %d(%d)", ft, imm, rs);
break;
}
case 0x0F: {
DIP("prefx");
break;
}
case 0x20: { /* MADD.S */
DIP("madd.s f%d, f%d, f%d, f%d", fmt, ft, fs, fd);
IRExpr *rm = get_IR_roundingmode();
t1 = newTemp(Ity_F32);
assign(t1, triop(Iop_MulF32, rm, getLoFromF64(tyF, getFReg(fs)),
getLoFromF64(tyF, getFReg(ft))));
putFReg(fd, mkWidenFromF32(tyF, triop(Iop_AddF32, rm, mkexpr(t1),
getLoFromF64(tyF, getFReg(fmt)))));
break; /* MADD.S */
}
case 0x21: { /* MADD.D */
DIP("madd.d f%d, f%d, f%d, f%d", fmt, ft, fs, fd);
IRExpr *rm = get_IR_roundingmode();
t1 = newTemp(Ity_F64);
assign(t1, triop(Iop_MulF64, rm, getDReg(fs), getDReg(ft)));
putDReg(fd, triop(Iop_AddF64, rm, mkexpr(t1), getDReg(fmt)));
break; /* MADD.D */
}
case 0x28: { /* MSUB.S */
DIP("msub.s f%d, f%d, f%d, f%d", fmt, ft, fs, fd);
IRExpr *rm = get_IR_roundingmode();
t1 = newTemp(Ity_F32);
assign(t1, triop(Iop_MulF32, rm, getLoFromF64(tyF, getFReg(fs)),
getLoFromF64(tyF, getFReg(ft))));
putFReg(fd, mkWidenFromF32(tyF, triop(Iop_SubF32, rm,
mkexpr(t1), getLoFromF64(tyF, getFReg(fmt)))));
break; /* MSUB.S */
}
case 0x29: { /* MSUB.D */
DIP("msub.d f%d, f%d, f%d, f%d", fmt, ft, fs, fd);
IRExpr *rm = get_IR_roundingmode();
t1 = newTemp(Ity_F64);
assign(t1, triop(Iop_MulF64, rm, getDReg(fs), getDReg(ft)));
putDReg(fd, triop(Iop_SubF64, rm, mkexpr(t1), getDReg(fmt)));
break; /* MSUB.D */
}
case 0x30: { /* NMADD.S */
DIP("nmadd.s f%d, f%d, f%d, f%d", fmt, ft, fs, fd);
IRExpr *rm = get_IR_roundingmode();
t1 = newTemp(Ity_F32);
t2 = newTemp(Ity_F32);
assign(t1, triop(Iop_MulF32, rm, getLoFromF64(tyF, getFReg(fs)),
getLoFromF64(tyF, getFReg(ft))));
assign(t2, triop(Iop_AddF32, rm, mkexpr(t1),
getLoFromF64(tyF, getFReg(fmt))));
putFReg(fd, mkWidenFromF32(tyF, unop(Iop_NegF32, mkexpr(t2))));
break; /* NMADD.S */
}
case 0x31: { /* NMADD.D */
DIP("nmadd.d f%d, f%d, f%d, f%d", fmt, ft, fs, fd);
IRExpr *rm = get_IR_roundingmode();
t1 = newTemp(Ity_F64);
t2 = newTemp(Ity_F64);
assign(t1, triop(Iop_MulF64, rm, getDReg(fs), getDReg(ft)));
assign(t2, triop(Iop_AddF64, rm, mkexpr(t1), getDReg(fmt)));
putDReg(fd, unop(Iop_NegF64, mkexpr(t2)));
break; /* NMADD.D */
}
case 0x38: { /* NMSUBB.S */
DIP("nmsub.s f%d, f%d, f%d, f%d", fmt, ft, fs, fd);
IRExpr *rm = get_IR_roundingmode();
t1 = newTemp(Ity_F32);
t2 = newTemp(Ity_F32);
assign(t1, triop(Iop_MulF32, rm, getLoFromF64(tyF, getFReg(fs)),
getLoFromF64(tyF, getFReg(ft))));
assign(t2, triop(Iop_SubF32, rm, mkexpr(t1), getLoFromF64(tyF,
getFReg(fmt))));
putFReg(fd, mkWidenFromF32(tyF, unop(Iop_NegF32, mkexpr(t2))));
break; /* NMSUBB.S */
}
case 0x39: { /* NMSUBB.D */
DIP("nmsub.d f%d, f%d, f%d, f%d", fmt, ft, fs, fd);
IRExpr *rm = get_IR_roundingmode();
t1 = newTemp(Ity_F64);
t2 = newTemp(Ity_F64);
assign(t1, triop(Iop_MulF64, rm, getDReg(fs), getDReg(ft)));
assign(t2, triop(Iop_SubF64, rm, mkexpr(t1), getDReg(fmt)));
putDReg(fd, unop(Iop_NegF64, mkexpr(t2)));
break; /* NMSUBB.D */
}
default:
goto decode_failure;
}
break;
case 0x22: /* LWL */
DIP("lwl r%d, %d(r%d)", rt, imm, rs);
{
/* t1 = addr */
t1 = newTemp(Ity_I32);
#if defined (_MIPSEL)
assign(t1, binop(Iop_Add32, getIReg(rs), mkU32(extend_s_16to32(imm))));
#elif defined (_MIPSEB)
assign(t1, binop(Iop_Xor32, mkU32(0x3), binop(Iop_Add32, getIReg(rs),
mkU32(extend_s_16to32(imm)))));
#endif
/* t2 = word addr */
/* t4 = addr mod 4 */
LWX_SWX_PATTERN;
/* t3 = word content - shifted */
t3 = newTemp(Ity_I32);
assign(t3, binop(Iop_Shl32, load(Ity_I32, mkexpr(t2)), narrowTo(Ity_I8,
binop(Iop_Shl32, binop(Iop_Sub32, mkU32(0x03), mkexpr(t4)),
mkU8(3)))));
/* rt content - adjusted */
t5 = newTemp(Ity_I32);
assign(t5, binop(Iop_And32, getIReg(rt), binop(Iop_Shr32,
mkU32(0xFFFFFFFF), narrowTo(Ity_I8, binop(Iop_Shl32,
binop(Iop_Add32, mkexpr(t4), mkU32(0x1)), mkU8(0x3))))));
putIReg(rt, binop(Iop_Or32, mkexpr(t5), mkexpr(t3)));
}
break;
case 0x26: /* LWR */
DIP("lwr r%d, %d(r%d)", rt, imm, rs);
{
/* t1 = addr */
t1 = newTemp(Ity_I32);
#if defined (_MIPSEL)
assign(t1, binop(Iop_Add32, getIReg(rs), mkU32(extend_s_16to32(imm))));
#elif defined (_MIPSEB)
assign(t1, binop(Iop_Xor32, mkU32(0x3), binop(Iop_Add32, getIReg(rs),
mkU32(extend_s_16to32(imm)))));
#endif
/* t2 = word addr */
/* t4 = addr mod 4 */
LWX_SWX_PATTERN;
/* t3 = word content - shifted */
t3 = newTemp(Ity_I32);
assign(t3, binop(Iop_Shr32, load(Ity_I32, mkexpr(t2)),
narrowTo(Ity_I8, binop(Iop_Shl32, mkexpr(t4),
mkU8(3)))));
/* rt content - adjusted */
t5 = newTemp(Ity_I32);
assign(t5, binop(Iop_And32, getIReg(rt), unop(Iop_Not32,
binop(Iop_Shr32, mkU32(0xFFFFFFFF), narrowTo(Ity_I8,
binop(Iop_Shl32, mkexpr(t4), mkU8(0x3)))))));
putIReg(rt, binop(Iop_Or32, mkexpr(t5), mkexpr(t3)));
}
break;
case 0x2B: /* SW */
DIP("sw r%d, %d(r%d)", rt, imm, rs);
LOAD_STORE_PATTERN;
store(mkexpr(t1), mkNarrowTo32(ty, getIReg(rt)));
break;
case 0x28: /* SB */
DIP("sb r%d, %d(r%d)", rt, imm, rs);
LOAD_STORE_PATTERN;
store(mkexpr(t1), narrowTo(Ity_I8, getIReg(rt)));
break;
case 0x29: /* SH */
DIP("sh r%d, %d(r%d)", rt, imm, rs);
LOAD_STORE_PATTERN;
store(mkexpr(t1), narrowTo(Ity_I16, getIReg(rt)));
break;
case 0x2A: /* SWL */
DIP("swl r%d, %d(r%d)", rt, imm, rs);
{
/* t1 = addr */
t1 = newTemp(Ity_I32);
#if defined (_MIPSEL)
assign(t1, binop(Iop_Add32, getIReg(rs), mkU32(extend_s_16to32(imm))));
#elif defined (_MIPSEB)
assign(t1, binop(Iop_Xor32, mkU32(0x3), binop(Iop_Add32, getIReg(rs),
mkU32(extend_s_16to32(imm)))));
#endif
/* t2 = word addr */
/* t4 = addr mod 4 */
LWX_SWX_PATTERN;
/* t3 = rt content - shifted */
t3 = newTemp(Ity_I32);
assign(t3, binop(Iop_Shr32, getIReg(rt), narrowTo(Ity_I8,
binop(Iop_Shl32, binop(Iop_Sub32, mkU32(0x03), mkexpr(t4)),
mkU8(3)))));
/* word content - adjusted */
t5 = newTemp(Ity_I32);
t6 = newTemp(Ity_I32);
t7 = newTemp(Ity_I32);
t8 = newTemp(Ity_I32);
// neg(shr(0xFFFFFFFF, mul(sub(3,n), 8)))
assign(t5, binop(Iop_Mul32, binop(Iop_Sub32, mkU32(0x3), mkexpr(t4)),
mkU32(0x8)));
assign(t6, binop(Iop_Shr32, mkU32(0xFFFFFFFF), narrowTo(Ity_I8,
mkexpr(t5))));
assign(t7, binop(Iop_Xor32, mkU32(0xFFFFFFFF), mkexpr(t6)));
assign(t8, binop(Iop_And32, load(Ity_I32, mkexpr(t2)), mkexpr(t7)));
store(mkexpr(t2), binop(Iop_Or32, mkexpr(t8), mkexpr(t3)));
}
break;
case 0x2E: /* SWR */
DIP("swr r%d, %d(r%d)", rt, imm, rs);
{
/* t1 = addr */
t1 = newTemp(Ity_I32);
#if defined (_MIPSEL)
assign(t1, binop(Iop_Add32, getIReg(rs), mkU32(extend_s_16to32(imm))));
#elif defined (_MIPSEB)
assign(t1, binop(Iop_Xor32, mkU32(0x3), binop(Iop_Add32, getIReg(rs),
mkU32(extend_s_16to32(imm)))));
#endif
/* t2 = word addr */
/* t4 = addr mod 4 */
LWX_SWX_PATTERN;
/* t3 = rt content - shifted */
t3 = newTemp(Ity_I32);
assign(t3, binop(Iop_Shl32, getIReg(rt), narrowTo(Ity_I8,
binop(Iop_Shl32, mkexpr(t4), mkU8(3)))));
/* word content - adjusted */
t5 = newTemp(Ity_I32);
assign(t5, binop(Iop_And32, load(Ity_I32, mkexpr(t2)), unop(Iop_Not32,
binop(Iop_Shl32, mkU32(0xFFFFFFFF), narrowTo(Ity_I8,
binop(Iop_Shl32, mkexpr(t4), mkU8(0x3)))))));
store(mkexpr(t2), binop(Iop_Xor32, mkexpr(t5), mkexpr(t3)));
}
break;
case 0x1C: /*Special2 */
switch (function) {
case 0x02: { /* MUL */
DIP("mul r%d, r%d, r%d", rd, rs, rt);
putIReg(rd, binop(Iop_Mul32, getIReg(rs), getIReg(rt)));
break;
}
case 0x00: { /* MADD */
DIP("madd r%d, r%d", rs, rt);
t1 = newTemp(Ity_I32);
t2 = newTemp(Ity_I32);
t3 = newTemp(Ity_I64);
t4 = newTemp(Ity_I32);
t5 = newTemp(Ity_I32);
t6 = newTemp(Ity_I32);
assign(t1, getHI());
assign(t2, getLO());
assign(t3, binop(Iop_MullS32, getIReg(rs), getIReg(rt)));
assign(t4, binop(Iop_Add32, mkexpr(t2), unop(Iop_64to32,
mkexpr(t3))));
assign(t5, unop(Iop_1Uto32, binop(Iop_CmpLT32U, mkexpr(t4),
unop(Iop_64to32, mkexpr(t3)))));
assign(t6, binop(Iop_Add32, mkexpr(t5), mkexpr(t1)));
putHI(binop(Iop_Add32, mkexpr(t6), unop(Iop_64HIto32, mkexpr(t3))));
putLO(mkexpr(t4));
break;
}
case 0x01: { /* MADDU */
DIP("maddu r%d, r%d", rs, rt);
t1 = newTemp(Ity_I32);
t2 = newTemp(Ity_I32);
t3 = newTemp(Ity_I64);
t4 = newTemp(Ity_I32);
t5 = newTemp(Ity_I32);
t6 = newTemp(Ity_I32);
assign(t1, getHI());
assign(t2, getLO());
assign(t3, binop(Iop_MullU32, getIReg(rs), getIReg(rt)));
assign(t4, binop(Iop_Add32, mkexpr(t2), unop(Iop_64to32,
mkexpr(t3))));
assign(t5, unop(Iop_1Uto32, binop(Iop_CmpLT32U, mkexpr(t4),
unop(Iop_64to32, mkexpr(t3)))));
assign(t6, binop(Iop_Add32, mkexpr(t5), mkexpr(t1)));
putHI(binop(Iop_Add32, mkexpr(t6), unop(Iop_64HIto32, mkexpr(t3))));
putLO(mkexpr(t4));
break;
}
case 0x04: { /* MSUB */
DIP("msub r%d, r%d", rs, rt);
t1 = newTemp(Ity_I32);
t2 = newTemp(Ity_I32);
t3 = newTemp(Ity_I64);
t4 = newTemp(Ity_I32);
t5 = newTemp(Ity_I32);
t6 = newTemp(Ity_I32);
assign(t1, getHI());
assign(t2, getLO());
assign(t3, binop(Iop_MullS32, getIReg(rs), getIReg(rt)));
assign(t4, unop(Iop_64to32, mkexpr(t3))); //new lo
//if lo<lo(mul) hi = hi - 1
assign(t5, unop(Iop_1Sto32, binop(Iop_CmpLT32U, mkexpr(t2),
mkexpr(t4))));
assign(t6, IRExpr_Mux0X(unop(Iop_32to8, mkexpr(t5)), mkexpr(t1),
binop(Iop_Sub32, mkexpr(t1), mkU32(0x1))));
putHI(binop(Iop_Sub32, mkexpr(t6), unop(Iop_64HIto32, mkexpr(t3))));
putLO(binop(Iop_Sub32, mkexpr(t2), mkexpr(t4)));
break;
}
case 0x05: { /* MSUBU */
DIP("msubu r%d, r%d", rs, rt);
t1 = newTemp(Ity_I32);
t2 = newTemp(Ity_I32);
t3 = newTemp(Ity_I64);
t4 = newTemp(Ity_I32);
t5 = newTemp(Ity_I32);
t6 = newTemp(Ity_I32);
assign(t1, getHI());
assign(t2, getLO());
assign(t3, binop(Iop_MullU32, getIReg(rs), getIReg(rt)));
assign(t4, unop(Iop_64to32, mkexpr(t3))); //new lo
//if lo<lo(mul) hi = hi - 1
assign(t5, unop(Iop_1Sto32, binop(Iop_CmpLT32U, mkexpr(t2),
mkexpr(t4))));
assign(t6, IRExpr_Mux0X(unop(Iop_32to8, mkexpr(t5)),
mkexpr(t1), binop(Iop_Sub32, mkexpr(t1), mkU32(0x1))));
putHI(binop(Iop_Sub32, mkexpr(t6), unop(Iop_64HIto32, mkexpr(t3))));
putLO(binop(Iop_Sub32, mkexpr(t2), mkexpr(t4)));
break;
}
case 0x20: { /* CLZ */
DIP("clz r%d, r%d", rd, rs);
t1 = newTemp(Ity_I32);
assign(t1, unop(Iop_1Sto32, binop(Iop_CmpEQ32, getIReg(rs),
mkU32(0))));
putIReg(rd, IRExpr_Mux0X(unop(Iop_32to8, mkexpr(t1)),
unop(Iop_Clz32, getIReg(rs)), mkU32(0x00000020)));
break;
}
case 0x21: { /* CLO */
DIP("clo r%d, r%d", rd, rs);
t1 = newTemp(Ity_I32);
assign(t1, unop(Iop_1Sto32, binop(Iop_CmpEQ32, getIReg(rs),
mkU32(0xffffffff))));
putIReg(rd, IRExpr_Mux0X(unop(Iop_32to8, mkexpr(t1)),
unop(Iop_Clz32, unop(Iop_Not32, getIReg(rs))),
mkU32(0x00000020)));
break;
}
default:
goto decode_failure;
}
break;
case 0x1F: /*Special3 */
switch (function) {
case 0x3B:
/*RDHWR*/ {
DIP("rdhwr r%d, r%d", rt, rd);
if (rd == 29) {
putIReg(rt, getULR());
} else
goto decode_failure;
break;
}
case 0x04:
/*INS*/ msb = get_msb(cins);
lsb = get_lsb(cins);
size = msb - lsb + 1;
vassert(lsb + size <= 32);
vassert(lsb + size > 0);
DIP("ins size:%d msb:%d lsb:%d", size, msb, lsb);
/*put size bits from rs at the pos in temporary */
t0 = newTemp(Ity_I32);
t3 = newTemp(Ity_I32);
/*shift left for 32 - size to clear leading bits and get zeros
at the end */
assign(t0, binop(Iop_Shl32, getIReg(rs), mkU8(32 - size)));
/*now set it at pos */
t1 = newTemp(Ity_I32);
assign(t1, binop(Iop_Shr32, mkexpr(t0), mkU8(32 - size - lsb)));
if (lsb > 0) {
t2 = newTemp(Ity_I32);
/*clear everything but lower pos bits from rt */
assign(t2, binop(Iop_Shl32, getIReg(rt), mkU8(32 - lsb)));
assign(t3, binop(Iop_Shr32, mkexpr(t2), mkU8(32 - lsb)));
}
if (msb < 31) {
t4 = newTemp(Ity_I32);
/*clear everything but upper msb + 1 bits from rt */
assign(t4, binop(Iop_Shr32, getIReg(rt), mkU8(msb + 1)));
t5 = newTemp(Ity_I32);
assign(t5, binop(Iop_Shl32, mkexpr(t4), mkU8(msb + 1)));
/*now combine these registers */
if (lsb > 0) {
t6 = newTemp(Ity_I32);
assign(t6, binop(Iop_Or32, mkexpr(t5), mkexpr(t1)));
putIReg(rt, binop(Iop_Or32, mkexpr(t6), mkexpr(t3)));
} else {
putIReg(rt, binop(Iop_Or32, mkexpr(t1), mkexpr(t5)));
}
}
else {
putIReg(rt, binop(Iop_Or32, mkexpr(t1), mkexpr(t3)));
}
break;
case 0x00:
/*EXT*/ msb = get_msb(cins);
lsb = get_lsb(cins);
size = msb + 1;
DIP("ext size:%d msb:%d lsb:%d", size, msb, lsb);
vassert(lsb + size <= 32);
vassert(lsb + size > 0);
/*put size bits from rs at the top of in temporary */
if (lsb + size < 32) {
t0 = newTemp(Ity_I32);
assign(t0, binop(Iop_Shl32, getIReg(rs), mkU8(32 - lsb - size)));
putIReg(rt, binop(Iop_Shr32, mkexpr(t0), mkU8(32 - size)));
} else {
putIReg(rt, binop(Iop_Shr32, getIReg(rs), mkU8(32 - size)));
}
break;
case 0x20:
/*BSHFL*/ switch (sa) {
case 0x10:
/*SEB*/ DIP("seb r%d, r%d", rd, rt);
putIReg(rd, unop(Iop_8Sto32, unop(Iop_32to8, getIReg(rt))));
break;
case 0x18:
/*SEH*/ DIP("seh r%d, r%d", rd, rt);
putIReg(rd, unop(Iop_16Sto32, unop(Iop_32to16, getIReg(rt))));
break;
case 0x02:
/*WSBH*/ DIP("wsbh r%d, r%d", rd, rt);
t0 = newTemp(Ity_I32);
t1 = newTemp(Ity_I32);
t2 = newTemp(Ity_I32);
t3 = newTemp(Ity_I32);
assign(t0, binop(Iop_Shl32, binop(Iop_And32, getIReg(rt),
mkU32(0x00FF0000)), mkU8(0x8)));
assign(t1, binop(Iop_Shr32, binop(Iop_And32, getIReg(rt),
mkU32(0xFF000000)), mkU8(0x8)));
assign(t2, binop(Iop_Shl32, binop(Iop_And32, getIReg(rt),
mkU32(0x000000FF)), mkU8(0x8)));
assign(t3, binop(Iop_Shr32, binop(Iop_And32, getIReg(rt),
mkU32(0x0000FF00)), mkU8(0x8)));
putIReg(rd, binop(Iop_Or32, binop(Iop_Or32, mkexpr(t0),
mkexpr(t1)), binop(Iop_Or32, mkexpr(t2), mkexpr(t3))));
break;
default:
goto decode_failure;
}
break;
/*BSHFL*/ default:
goto decode_failure;
}
break; /*Special3 */
case 0x3B:
if (0x3B == function && (archinfo->hwcaps & VEX_PRID_COMP_BROADCOM)) {
/*RDHWR*/
DIP("rdhwr r%d, r%d", rt, rd);
if (rd == 29) {
putIReg(rt, getULR());
} else
goto decode_failure;
break;
} else {
goto decode_failure;
}
case 0x00: /*Special */
switch (function) {
case 0x1: {
UInt mov_cc = get_mov_cc(cins);
if (tf == 0) { /* MOVF */
DIP("movf r%d, r%d, %d", rd, rs, mov_cc);
{
t1 = newTemp(Ity_I32);
t2 = newTemp(Ity_I32);
t3 = newTemp(Ity_I32);
t4 = newTemp(Ity_I32);
assign(t1, unop(Iop_1Sto32, binop(Iop_CmpEQ32, mkU32(0),
mkU32(mov_cc))));
assign(t2, IRExpr_Mux0X(unop(Iop_32to8, mkexpr(t1)),
binop(Iop_And32, binop(Iop_Shr32, getFCSR(),
mkU8(24 + mov_cc)), mkU32(0x1)), binop(Iop_And32,
binop(Iop_Shr32, getFCSR(), mkU8(23)),
mkU32(0x1))));
assign(t3, unop(Iop_1Sto32, binop(Iop_CmpEQ32, mkU32(0),
mkexpr(t2))));
assign(t4, IRExpr_Mux0X(unop(Iop_32to8, mkexpr(t3)),
getIReg(rd), getIReg(rs)));
putIReg(rd, mkexpr(t4));
}
} else if (tf == 1) { /* MOVT */
DIP("movt r%d, r%d, %d", rd, rs, mov_cc);
{
t1 = newTemp(Ity_I32);
t2 = newTemp(Ity_I32);
t3 = newTemp(Ity_I32);
t4 = newTemp(Ity_I32);
assign(t1, unop(Iop_1Sto32, binop(Iop_CmpEQ32, mkU32(0),
mkU32(mov_cc))));
assign(t2, IRExpr_Mux0X(unop(Iop_32to8, mkexpr(t1)),
binop(Iop_And32, binop(Iop_Shr32, getFCSR(),
mkU8(24 + mov_cc)), mkU32(0x1)), binop(Iop_And32,
binop(Iop_Shr32, getFCSR(), mkU8(23)),
mkU32(0x1))));
assign(t3, unop(Iop_1Sto32, binop(Iop_CmpEQ32, mkU32(1),
mkexpr(t2))));
assign(t4, IRExpr_Mux0X(unop(Iop_32to8, mkexpr(t3)),
getIReg(rd), getIReg(rs)));
putIReg(rd, mkexpr(t4));
}
}
break;
}
case 0x0A: {
/* MOVZ */
DIP("movz r%d, r%d, r%d", rd, rs, rt);
t1 = newTemp(ty);
t2 = newTemp(ty);
{
assign(t1, unop(Iop_1Sto32, binop(Iop_CmpEQ32, getIReg(rt),
mkU32(0x0))));
assign(t2, unop(Iop_1Sto32, binop(Iop_CmpNE32, getIReg(rt),
mkU32(0x0))));
putIReg(rd, binop(Iop_Add32, binop(Iop_And32, getIReg(rs),
mkexpr(t1)), binop(Iop_And32, getIReg(rd),
mkexpr(t2))));
}
break;
}
case 0x0B: {
/* MOVN */
DIP("movn r%d, r%d, r%d", rd, rs, rt);
t1 = newTemp(ty);
t2 = newTemp(ty);
{
assign(t1, unop(Iop_1Sto32, binop(Iop_CmpEQ32, getIReg(rt),
mkU32(0x0))));
assign(t2, unop(Iop_1Sto32, binop(Iop_CmpNE32, getIReg(rt),
mkU32(0x0))));
putIReg(rd, binop(Iop_Add32, binop(Iop_And32, getIReg(rs),
mkexpr(t2)), binop(Iop_And32, getIReg(rd),
mkexpr(t1))));
}
break;
}
case 0x18: /* MULT */
DIP("mult r%d, r%d", rs, rt);
t2 = newTemp(Ity_I64);
assign(t2, binop(Iop_MullS32, mkNarrowTo32(ty, getIReg(rs)),
mkNarrowTo32(ty, getIReg(rt))));
putHI(mkWidenFrom32(ty, unop(Iop_64HIto32, mkexpr(t2)), True));
putLO(mkWidenFrom32(ty, unop(Iop_64to32, mkexpr(t2)), True));
break;
case 0x19: /* MULTU */
DIP("multu r%d, r%d", rs, rt);
t2 = newTemp(Ity_I64);
assign(t2, binop(Iop_MullU32, mkNarrowTo32(ty, getIReg(rs)),
mkNarrowTo32(ty, getIReg(rt))));
putHI(mkWidenFrom32(ty, unop(Iop_64HIto32, mkexpr(t2)), True));
putLO(mkWidenFrom32(ty, unop(Iop_64to32, mkexpr(t2)), True));
break;
case 0x20: /* ADD */
DIP("add r%d, r%d, r%d", rd, rs, rt);
t0 = newTemp(Ity_I32);
t1 = newTemp(Ity_I32);
t2 = newTemp(Ity_I32);
t3 = newTemp(Ity_I32);
t4 = newTemp(Ity_I32);
/* dst = src0 + src1
* if(sign(src0 ) != sign(src1 ))
* goto no overflow;
* if(sign(dst) == sign(src0 ))
* goto no overflow;
* # we have overflow! */
assign(t0, binop(Iop_Add32, getIReg(rs), getIReg(rt)));
assign(t1, binop(Iop_Xor32, getIReg(rs), getIReg(rt)));
assign(t2, unop(Iop_1Uto32,
binop(Iop_CmpEQ32,
binop(Iop_And32, mkexpr(t1), mkU32(0x80000000)),
mkU32(0x80000000))));
assign(t3, binop(Iop_Xor32, mkexpr(t0), getIReg(rs)));
assign(t4, unop(Iop_1Uto32,
binop(Iop_CmpNE32,
binop(Iop_And32, mkexpr(t3), mkU32(0x80000000)),
mkU32(0x80000000))));
stmt(IRStmt_Exit(binop(Iop_CmpEQ32,
binop(Iop_Or32, mkexpr(t2), mkexpr(t4)),
mkU32(0)),
Ijk_SigFPE_IntOvf,
IRConst_U32(guest_PC_curr_instr + 4), OFFB_PC));
putIReg(rd, mkexpr(t0));
break;
case 0x1A: /* DIV */
DIP("div r%d, r%d", rs, rt);
{
t1 = newTemp(Ity_I64);
t2 = newTemp(Ity_I64);
assign(t1, unop(Iop_32Sto64, getIReg(rs)));
assign(t2, binop(Iop_DivModS64to32, mkexpr(t1), getIReg(rt)));
putHI(unop(Iop_64HIto32, mkexpr(t2)));
putLO(unop(Iop_64to32, mkexpr(t2)));
}
break;
case 0x1B: /* DIVU */
DIP("divu r%d, r%d", rs, rt);
{
t1 = newTemp(Ity_I64);
t2 = newTemp(Ity_I64);
assign(t1, unop(Iop_32Uto64, getIReg(rs)));
assign(t2, binop(Iop_DivModU64to32, mkexpr(t1), getIReg(rt)));
putHI(unop(Iop_64HIto32, mkexpr(t2)));
putLO(unop(Iop_64to32, mkexpr(t2)));
}
break;
case 0x10: /* MFHI */
DIP("mfhi r%d", rd);
putIReg(rd, getHI());
break;
case 0x11: /* MTHI */
DIP("mthi r%d", rs);
putHI(getIReg(rs));
break;
case 0x12: /* MFLO */
DIP("mflo r%d", rd);
putIReg(rd, getLO());
break;
case 0x13: /* MTLO */
DIP("mtlo r%d", rs);
putLO(getIReg(rs));
break;
case 0x21: /* ADDU */
DIP("addu r%d, r%d, r%d", rd, rs, rt);
ALU_PATTERN(Iop_Add32);
break;
case 0x22: /* SUB */
DIP("sub r%d, r%d, r%d", rd, rs, rt);
t0 = newTemp(Ity_I32);
t1 = newTemp(Ity_I32);
t2 = newTemp(Ity_I32);
t3 = newTemp(Ity_I32);
t4 = newTemp(Ity_I32);
t5 = newTemp(Ity_I32);
/* dst = src0 + (-1 * src1)
* if(sign(src0 ) != sign((-1 * src1) ))
* goto no overflow;
* if(sign(dst) == sign(src0 ))
* goto no overflow;
* # we have overflow! */
assign(t5, binop(Iop_Mul32, getIReg(rt), mkU32(-1)));
assign(t0, binop(Iop_Add32, getIReg(rs), mkexpr(t5)));
assign(t1, binop(Iop_Xor32, getIReg(rs), mkexpr(t5)));
assign(t2, unop(Iop_1Sto32,
binop(Iop_CmpEQ32,
binop(Iop_And32, mkexpr(t1), mkU32(0x80000000)),
mkU32(0x80000000))));
assign(t3, binop(Iop_Xor32, mkexpr(t0), getIReg(rs)));
assign(t4, unop(Iop_1Sto32,
binop(Iop_CmpNE32,
binop(Iop_And32, mkexpr(t3), mkU32(0x80000000)),
mkU32(0x80000000))));
stmt(IRStmt_Exit(binop(Iop_CmpEQ32,
binop(Iop_Or32, mkexpr(t2), mkexpr(t4)),
mkU32(0)),
Ijk_SigFPE_IntOvf,
IRConst_U32(guest_PC_curr_instr + 4), OFFB_PC));
putIReg(rd, mkexpr(t0));
break;
case 0x23: /* SUBU */
DIP("subu r%d, r%d, r%d", rd, rs, rt);
ALU_PATTERN(Iop_Sub32);
break;
case 0x24: /* AND */
DIP("and r%d, r%d, r%d", rd, rs, rt);
ALU_PATTERN(Iop_And32);
break;
case 0x25: /* OR */
DIP("or r%d, r%d, r%d", rd, rs, rt);
ALU_PATTERN(Iop_Or32);
break;
case 0x26: /* XOR */
DIP("xor r%d, r%d, r%d", rd, rs, rt);
ALU_PATTERN(Iop_Xor32);
break;
case 0x27: /* NOR */
DIP("nor r%d, r%d, r%d", rd, rs, rt);
putIReg(rd, unop(Iop_Not32, binop(Iop_Or32, getIReg(rs),getIReg(rt))));
break;
case 0x08: /* JR */
DIP("jr r%d", rs);
t0 = newTemp(ty);
assign(t0, getIReg(rs));
lastn = mkexpr(t0);
break;
case 0x09: /* JALR */
DIP("jalr r%d r%d", rd, rs);
putIReg(rd, mkU32(guest_PC_curr_instr + 8));
t0 = newTemp(Ity_I32);
assign(t0, getIReg(rs));
lastn = mkexpr(t0);
break;
case 0x0C: /* SYSCALL */
DIP("syscall");
putPC(mkU32(guest_PC_curr_instr + 4));
dres.jk_StopHere = Ijk_Sys_syscall;
dres.whatNext = Dis_StopHere;
break;
case 0x2A: /* SLT */
DIP("slt r%d, r%d, r%d", rd, rs, rt);
putIReg(rd, unop(Iop_1Uto32, binop(Iop_CmpLT32S, getIReg(rs),
getIReg(rt))));
break;
case 0x2B: /* SLTU */
DIP("sltu r%d, r%d, r%d", rd, rs, rt);
putIReg(rd, unop(Iop_1Uto32, binop(Iop_CmpLT32U, getIReg(rs),
getIReg(rt))));
break;
case 0x00:
/* SLL */
DIP("sll r%d, r%d, %d", rd, rt, sa);
SXX_PATTERN(Iop_Shl32);
break;
case 0x04: /* SLLV */
DIP("sllv r%d, r%d, r%d", rd, rt, rs);
SXXV_PATTERN(Iop_Shl32);
break;
case 0x03: /* SRA */
DIP("sra r%d, r%d, %d", rd, rt, sa);
SXX_PATTERN(Iop_Sar32);
break;
case 0x07: /* SRAV */
DIP("srav r%d, r%d, r%d", rd, rt, rs);
SXXV_PATTERN(Iop_Sar32);
break;
case 0x02: { /* SRL */
rot = get_rot(cins);
if (rot) {
DIP("rotr r%d, r%d, %d", rd, rt, sa);
putIReg(rd, mkWidenFrom32(ty, genROR32(mkNarrowTo32(ty,
getIReg(rt)), sa), False));
} else {
DIP("srl r%d, r%d, %d", rd, rt, sa);
SXX_PATTERN(Iop_Shr32);
}
break;
}
case 0x06: {
rot = get_rotv(cins);
if (rot) {
DIP("rotrv r%d, r%d, r%d", rd, rt, rs);
putIReg(rd, mkWidenFrom32(ty, genRORV32(mkNarrowTo32(ty,
getIReg(rt)), mkNarrowTo32(ty, getIReg(rs))),False));
break;
} else {
/* SRLV */
DIP("srlv r%d, r%d, r%d", rd, rt, rs);
SXXV_PATTERN(Iop_Shr32);
break;
}
}
case 0x0D: /* BREAK */
DIP("Info: Breakpoint...code = %d", trap_code);
jmp_lit(&dres, Ijk_SigTRAP, (guest_PC_curr_instr + 4));
vassert(dres.whatNext == Dis_StopHere);
break;
case 0x30: { /* TGE */
/*tge */ DIP("tge r%d, r%d %d", rs, rt, trap_code);
if (trap_code == 7)
stmt (IRStmt_Exit (binop (Iop_CmpLT32S, getIReg (rt), getIReg (rs)),
Ijk_SigFPE_IntDiv,
IRConst_U32 (guest_PC_curr_instr + 4), OFFB_PC));
else if (trap_code == 6)
stmt (IRStmt_Exit (binop (Iop_CmpLT32S, getIReg (rt), getIReg (rs)),
Ijk_SigFPE_IntOvf,
IRConst_U32 (guest_PC_curr_instr + 4), OFFB_PC));
else
stmt (IRStmt_Exit (binop (Iop_CmpLT32S, getIReg (rt), getIReg (rs)),
Ijk_SigTRAP,
IRConst_U32 (guest_PC_curr_instr + 4), OFFB_PC));
break;
}
case 0x31: { /* TGEU */
/*tgeu */ DIP("tgeu r%d, r%d %d", rs, rt, trap_code);
if (trap_code == 7)
stmt (IRStmt_Exit (binop (Iop_CmpLT32U, getIReg (rt), getIReg (rs)),
Ijk_SigFPE_IntDiv,
IRConst_U32 (guest_PC_curr_instr + 4), OFFB_PC));
else if (trap_code == 6)
stmt (IRStmt_Exit (binop (Iop_CmpLT32U, getIReg (rt), getIReg (rs)),
Ijk_SigFPE_IntOvf,
IRConst_U32 (guest_PC_curr_instr + 4), OFFB_PC));
else
stmt (IRStmt_Exit (binop (Iop_CmpLT32U, getIReg (rt), getIReg (rs)),
Ijk_SigTRAP,
IRConst_U32 (guest_PC_curr_instr + 4), OFFB_PC));
break;
}
case 0x32: { /* TLT */
/*tlt */ DIP("tlt r%d, r%d %d", rs, rt, trap_code);
if (trap_code == 7)
stmt (IRStmt_Exit (binop (Iop_CmpLT32S, getIReg (rs), getIReg (rt)),
Ijk_SigFPE_IntDiv,
IRConst_U32 (guest_PC_curr_instr + 4), OFFB_PC));
else if (trap_code == 6)
stmt (IRStmt_Exit (binop (Iop_CmpLT32S, getIReg (rs), getIReg (rt)),
Ijk_SigFPE_IntOvf,
IRConst_U32 (guest_PC_curr_instr + 4), OFFB_PC));
else
stmt (IRStmt_Exit (binop (Iop_CmpLT32S, getIReg (rs), getIReg (rt)),
Ijk_SigTRAP,
IRConst_U32 (guest_PC_curr_instr + 4), OFFB_PC));
break;
}
case 0x33: { /* TLTU */
/*tltu */ DIP("tltu r%d, r%d %d", rs, rt, trap_code);
if (trap_code == 7)
stmt (IRStmt_Exit (binop (Iop_CmpLT32U, getIReg (rs), getIReg (rt)),
Ijk_SigFPE_IntDiv,
IRConst_U32 (guest_PC_curr_instr + 4), OFFB_PC));
else if (trap_code == 6)
stmt (IRStmt_Exit (binop (Iop_CmpLT32U, getIReg (rs), getIReg (rt)),
Ijk_SigFPE_IntOvf,
IRConst_U32 (guest_PC_curr_instr + 4), OFFB_PC));
else
stmt (IRStmt_Exit (binop (Iop_CmpLT32U, getIReg (rs), getIReg (rt)),
Ijk_SigTRAP,
IRConst_U32 (guest_PC_curr_instr + 4), OFFB_PC));
break;
}
case 0x34: { /* TEQ */
/*teq */ DIP("teq r%d, r%d %d", rs, rt, trap_code);
if (trap_code == 7)
stmt (IRStmt_Exit (binop (Iop_CmpEQ32, getIReg (rs), getIReg (rt)),
Ijk_SigFPE_IntDiv,
IRConst_U32 (guest_PC_curr_instr + 4), OFFB_PC));
else if (trap_code == 6)
stmt (IRStmt_Exit(binop (Iop_CmpEQ32, getIReg (rs), getIReg (rt)),
Ijk_SigFPE_IntOvf,
IRConst_U32 (guest_PC_curr_instr + 4), OFFB_PC));
else
stmt (IRStmt_Exit(binop (Iop_CmpEQ32, getIReg (rs), getIReg (rt)),
Ijk_SigTRAP, IRConst_U32 (guest_PC_curr_instr + 4), OFFB_PC));
break;
}
case 0x36: { /* TNE */
/*tne */ DIP("tne r%d, r%d %d", rs, rt, trap_code);
if (trap_code == 7)
stmt (IRStmt_Exit (binop (Iop_CmpNE32, getIReg (rs), getIReg (rt)),
Ijk_SigFPE_IntDiv,
IRConst_U32 (guest_PC_curr_instr + 4), OFFB_PC));
else if (trap_code == 6)
stmt (IRStmt_Exit (binop (Iop_CmpNE32, getIReg (rs), getIReg (rt)),
Ijk_SigFPE_IntOvf,
IRConst_U32 (guest_PC_curr_instr + 4), OFFB_PC));
else
stmt (IRStmt_Exit (binop (Iop_CmpNE32, getIReg (rs), getIReg (rt)),
Ijk_SigTRAP,
IRConst_U32 (guest_PC_curr_instr + 4), OFFB_PC));
break;
}
case 0x0F: {
/*SYNC*/ DIP("sync r%d, r%d, %d", rt, rd, sel);
lsb = get_lsb(cins);
IRDirty *d = unsafeIRDirty_0_N(0,
"mips32_dirtyhelper_sync",
&mips32_dirtyhelper_sync,
mkIRExprVec_1
(mkU32(lsb)));
d->needsBBP = False;
d->nFxState = 0;
stmt(IRStmt_Dirty(d));
break;
}
default:
goto decode_failure;
}
break;
case 0x01: /* Regimm */
switch (rt) {
case 0x01: /* BGEZ */
DIP("bgez r%d, %d", rs, imm);
dis_branch(False, binop(Iop_CmpEQ32, binop(Iop_And32, getIReg(rs),
mkU32(0x80000000)), mkU32(0x0)), imm, &bstmt);
break;
case 0x03: /* BGEZL */
DIP("bgezl r%d, %d", rs, imm);
lastn = dis_branch_likely(binop(Iop_CmpNE32, binop(Iop_And32,
getIReg(rs), mode64 ?
mkU64(0x8000000000000000ULL)
:mkU32(0x80000000)),
mkU32(0x0)), imm);
break;
case 0x00: /* BLTZ */
DIP("bltz r%d, %d", rs, imm);
dis_branch(False, binop(Iop_CmpEQ32, binop(Iop_And32, getIReg(rs),
mkU32(0x80000000)), mkU32(0x80000000)), imm, &bstmt);
break;
case 0x02: /* BLTZL */
DIP("bltzl r%d, %d", rs, imm);
lastn = dis_branch_likely(binop(Iop_CmpNE32, binop(Iop_And32,
getIReg(rs), mkU32(0x80000000)),
mkU32(0x80000000)), imm);
break;
case 0x10: /* BLTZAL */
DIP("bltzal r%d, %d", rs, imm);
dis_branch(True, binop(Iop_CmpEQ32, binop(Iop_And32, getIReg(rs),
mkU32(0x80000000)), mkU32(0x80000000)), imm, &bstmt);
break;
case 0x12: /* BLTZALL */
DIP("bltzall r%d, %d", rs, imm);
putIReg(31, mkU32(guest_PC_curr_instr + 8));
lastn = dis_branch_likely(binop(Iop_CmpNE32, binop(Iop_And32,
getIReg(rs), mkU32(0x80000000)),
mkU32(0x80000000)), imm);
break;
case 0x11: /* BGEZAL */
DIP("bgezal r%d, %d", rs, imm);
dis_branch(True, binop(Iop_CmpEQ32, binop(Iop_And32, getIReg(rs),
mkU32(0x80000000)), mkU32(0x0)), imm, &bstmt);
break;
case 0x13: /* BGEZALL */
DIP("bgezall r%d, %d", rs, imm);
putIReg(31, mkU32(guest_PC_curr_instr + 8));
lastn = dis_branch_likely(binop(Iop_CmpNE32, binop(Iop_And32,
getIReg(rs), mkU32(0x80000000)),
mkU32(0x0)), imm);
break;
case 0x08: { /* TGEI */
/*tgei */ DIP("tgei r%d, %d %d", rs, imm, trap_code);
stmt (IRStmt_Exit (binop (Iop_CmpLT32S, mkU32 (imm), getIReg (rs)),
Ijk_SigTRAP,
IRConst_U32 (guest_PC_curr_instr + 4), OFFB_PC));
break;
}
case 0x09: { /* TGEIU */
/*tqeiu */ DIP("tgeiu r%d, %d %d", rs, imm, trap_code);
stmt (IRStmt_Exit (binop (Iop_CmpLT32U, mkU32 (imm), getIReg (rs)),
Ijk_SigTRAP,
IRConst_U32 (guest_PC_curr_instr + 4), OFFB_PC));
break;
}
case 0x0A: { /* TLTI */
/*tlti */ DIP("tlti r%d, %d %d", rs, imm, trap_code);
stmt (IRStmt_Exit (binop (Iop_CmpLT32S, getIReg (rs), mkU32 (imm)),
Ijk_SigTRAP,
IRConst_U32 (guest_PC_curr_instr + 4), OFFB_PC));
break;
}
case 0x0B: { /* TLTIU */
/*tltiu */ DIP("tltiu r%d, %d %d", rs, imm, trap_code);
stmt (IRStmt_Exit (binop (Iop_CmpLT32U, getIReg (rs), mkU32 (imm)),
Ijk_SigTRAP,
IRConst_U32 (guest_PC_curr_instr + 4), OFFB_PC));
break;
}
case 0x0C: { /* TEQI */
/*teqi */ DIP("teqi r%d, %d %d", rs, imm, trap_code);
stmt (IRStmt_Exit (binop (Iop_CmpEQ32, getIReg (rs), mkU32 (imm)),
Ijk_SigTRAP,
IRConst_U32 (guest_PC_curr_instr + 4), OFFB_PC));
break;
}
case 0x0E: { /* TNEI */
/*tnei */ DIP("tnei r%d, %d %d", rs, imm, trap_code);
stmt (IRStmt_Exit (binop (Iop_CmpNE32, getIReg (rs), mkU32 (imm)),
Ijk_SigTRAP,
IRConst_U32 (guest_PC_curr_instr + 4), OFFB_PC));
break;
}
case 0x1F:
/*SYNCI*/
//Just ignore it
break;
default:
goto decode_failure;
}
break;
case 0x04:
DIP("beq r%d, r%d, %d", rs, rt, imm);
dis_branch(False, binop(Iop_CmpEQ32, getIReg(rs), getIReg(rt)),
imm, &bstmt);
break;
case 0x14:
DIP("beql r%d, r%d, %d", rs, rt, imm);
lastn = dis_branch_likely(binop(Iop_CmpNE32, getIReg(rs), getIReg(rt)),
imm);
break;
case 0x05:
DIP("bne r%d, r%d, %d", rs, rt, imm);
dis_branch(False, binop(Iop_CmpNE32, getIReg(rs), getIReg(rt)),
imm, &bstmt);
break;
case 0x15:
DIP("bnel r%d, r%d, %d", rs, rt, imm);
lastn =
dis_branch_likely(binop(Iop_CmpEQ32, getIReg(rs), getIReg(rt)), imm);
break;
case 0x07: /* BGTZ */
DIP("bgtz r%d, %d", rs, imm);
dis_branch(False, unop(Iop_Not1, binop(Iop_CmpLE32S, getIReg(rs),
mkU32(0x00))), imm, &bstmt);
break;
case 0x17: /* BGTZL */
DIP("bgtzl r%d, %d", rs, imm);
lastn = dis_branch_likely(binop(Iop_CmpLE32S, getIReg(rs), mkU32(0x00)),
imm);
break;
case 0x06: /* BLEZ */
DIP("blez r%d, %d", rs, imm);
dis_branch(False,binop(Iop_CmpLE32S, getIReg(rs), mkU32(0x0)), imm,
&bstmt);
break;
case 0x16: /* BLEZL */
DIP("blezl r%d, %d", rs, imm);
lastn = dis_branch_likely(unop(Iop_Not1, (binop(Iop_CmpLE32S,
getIReg(rs), mkU32(0x0)))), imm);
break;
case 0x08: /* ADDI */
DIP("addi r%d, r%d, %d", rt, rs, imm);
t0 = newTemp(Ity_I32);
t1 = newTemp(Ity_I32);
t2 = newTemp(Ity_I32);
t3 = newTemp(Ity_I32);
t4 = newTemp(Ity_I32);
/* dst = src0 + sign(imm)
* if(sign(src0 ) != sign(imm ))
* goto no overflow;
* if(sign(dst) == sign(src0 ))
* goto no overflow;
* # we have overflow! */
assign(t0, binop(Iop_Add32, getIReg(rs), mkU32(extend_s_16to32(imm))));
assign(t1, binop(Iop_Xor32, getIReg(rs), mkU32(extend_s_16to32(imm))));
assign(t2, unop(Iop_1Sto32,
binop(Iop_CmpEQ32,
binop(Iop_And32, mkexpr(t1), mkU32(0x80000000)),
mkU32(0x80000000))));
assign(t3, binop(Iop_Xor32, mkexpr(t0), getIReg(rs)));
assign(t4, unop(Iop_1Sto32,
binop(Iop_CmpNE32,
binop(Iop_And32, mkexpr(t3), mkU32(0x80000000)),
mkU32(0x80000000))));
stmt(IRStmt_Exit(binop(Iop_CmpEQ32,
binop(Iop_Or32, mkexpr(t2), mkexpr(t4)),
mkU32(0)),
Ijk_SigFPE_IntOvf,
IRConst_U32(guest_PC_curr_instr + 4), OFFB_PC));
putIReg(rt, mkexpr(t0));
break;
case 0x09: /* ADDIU */
DIP("addiu r%d, r%d, %d", rt, rs, imm);
putIReg(rt, binop(Iop_Add32, getIReg(rs), mkU32(extend_s_16to32(imm))));
break;
case 0x0C: /* ANDI */
DIP("andi r%d, r%d, %d", rt, rs, imm);
ALUI_PATTERN(Iop_And32);
break;
case 0x0E: /* XORI */
DIP("xori r%d, r%d, %d", rt, rs, imm);
ALUI_PATTERN(Iop_Xor32);
break;
case 0x0D: /* ORI */
DIP("ori r%d, r%d, %d", rt, rs, imm);
ALUI_PATTERN(Iop_Or32);
break;
case 0x0A: /* SLTI */
DIP("slti r%d, r%d, %d", rt, rs, imm);
putIReg(rt, unop(Iop_1Uto32, binop(Iop_CmpLT32S, getIReg(rs),
mkU32(extend_s_16to32(imm)))));
break;
case 0x0B: /* SLTIU */
DIP("sltiu r%d, r%d, %d", rt, rs, imm);
putIReg(rt, unop(Iop_1Uto32, binop(Iop_CmpLT32U, getIReg(rs),
mkU32(extend_s_16to32(imm)))));
break;
case 0x30: /* LL / LWC0 */
DIP("ll r%d, %d(r%d)", rt, imm, rs);
LOAD_STORE_PATTERN;
t2 = newTemp(Ity_I32);
#if defined (_MIPSEL)
stmt(IRStmt_LLSC(Iend_LE, t2, mkexpr(t1), NULL /*this is a load */ ));
#elif defined (_MIPSEB)
stmt(IRStmt_LLSC(Iend_BE, t2, mkexpr(t1), NULL /*this is a load */ ));
#endif
putIReg(rt, mkexpr(t2));
break;
case 0x38: /* SC / SWC0 */
DIP("sc r%d, %d(r%d)", rt, imm, rs);
LOAD_STORE_PATTERN;
t2 = newTemp(Ity_I1);
#if defined (_MIPSEL)
stmt(IRStmt_LLSC(Iend_LE, t2, mkexpr(t1), mkNarrowTo32(ty, getIReg(rt))));
#elif defined (_MIPSEB)
stmt(IRStmt_LLSC(Iend_BE, t2, mkexpr(t1), mkNarrowTo32(ty, getIReg(rt))));
#endif
putIReg(rt, unop(Iop_1Uto32, mkexpr(t2)));
break;
decode_failure:
/* All decode failures end up here. */
if (sigill_diag)
vex_printf("vex mips->IR: unhandled instruction bytes: "
"0x%x 0x%x 0x%x 0x%x\n",
(Int) getIByte(delta_start + 0),
(Int) getIByte(delta_start + 1),
(Int) getIByte(delta_start + 2),
(Int) getIByte(delta_start + 3));
/* Tell the dispatcher that this insn cannot be decoded, and so has
not been executed, and (is currently) the next to be executed.
EIP should be up-to-date since it made so at the start bnezof each
insn, but nevertheless be paranoid and update it again right
now. */
stmt(IRStmt_Put(offsetof(VexGuestMIPS32State, guest_PC),
mkU32(guest_PC_curr_instr)));
jmp_lit(&dres, Ijk_NoDecode, guest_PC_curr_instr);
dres.whatNext = Dis_StopHere;
dres.len = 0;
return dres;
} /* switch (opc) for the main (primary) opcode switch. */
/* All MIPS insn have 4 bytes */
if (delay_slot_branch) {
delay_slot_branch = False;
stmt(bstmt);
bstmt = NULL;
putPC(mkU32(guest_PC_curr_instr + 4));
dres.jk_StopHere = is_Branch_or_Jump_and_Link(guest_code + delta - 4) ?
Ijk_Call : Ijk_Boring;
}
if (likely_delay_slot) {
dres.jk_StopHere = Ijk_Boring;
dres.whatNext = Dis_StopHere;
putPC(lastn);
lastn = NULL;
}
if (delay_slot_jump) {
putPC(lastn);
lastn = NULL;
dres.jk_StopHere = is_Branch_or_Jump_and_Link(guest_code + delta - 4) ?
Ijk_Call : Ijk_Boring;
}
decode_success:
/* All decode successes end up here. */
switch (dres.whatNext) {
case Dis_Continue:
putPC(mkU32(guest_PC_curr_instr + 4));
break;
case Dis_ResteerU:
case Dis_ResteerC:
putPC(mkU32(dres.continueAt));
break;
case Dis_StopHere:
break;
default:
vassert(0);
break;
}
// On MIPS we need to check if the last instruction
// in block is branch or jump
if ((vex_control.guest_max_insns - 1) == (delta+4)/4)
if (branch_or_jump(guest_code + delta + 4)) {
dres.whatNext = Dis_StopHere;
dres.jk_StopHere = Ijk_Boring;
putPC(mkU32(guest_PC_curr_instr + 4));
}
dres.len = 4;
DIP("\n");
return dres;
}
/*------------------------------------------------------------*/
/*--- Top-level fn ---*/
/*------------------------------------------------------------*/
/* Disassemble a single instruction into IR. The instruction
is located in host memory at &guest_code[delta]. */
DisResult
disInstr_MIPS(IRSB* irsb_IN,
Bool (*resteerOkFn) (void *, Addr64),
Bool resteerCisOk,
void* callback_opaque,
UChar* guest_code_IN,
Long delta,
Addr64 guest_IP,
VexArch guest_arch,
VexArchInfo* archinfo,
VexAbiInfo* abiinfo,
Bool host_bigendian_IN,
Bool sigill_diag_IN)
{
DisResult dres;
/* Set globals (see top of this file) */
vassert(guest_arch == VexArchMIPS32);
mode64 = guest_arch != VexArchMIPS32;
guest_code = guest_code_IN;
irsb = irsb_IN;
host_is_bigendian = host_bigendian_IN;
guest_PC_curr_instr = (Addr32) guest_IP;
guest_PC_bbstart = (Addr32) toUInt(guest_IP - delta);
dres = disInstr_MIPS_WRK(resteerOkFn, resteerCisOk, callback_opaque,
delta, archinfo, abiinfo, sigill_diag_IN);
return dres;
}
/*--------------------------------------------------------------------*/
/*--- end guest_mips_toIR.c ---*/
/*--------------------------------------------------------------------*/