| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "codegen_mips.h" |
| #include "dex/quick/mir_to_lir-inl.h" |
| #include "mips_lir.h" |
| |
| namespace art { |
| |
| /* This file contains codegen for the MIPS32 ISA. */ |
| LIR* MipsMir2Lir::OpFpRegCopy(int r_dest, int r_src) { |
| int opcode; |
| /* must be both DOUBLE or both not DOUBLE */ |
| DCHECK_EQ(MIPS_DOUBLEREG(r_dest), MIPS_DOUBLEREG(r_src)); |
| if (MIPS_DOUBLEREG(r_dest)) { |
| opcode = kMipsFmovd; |
| } else { |
| if (MIPS_SINGLEREG(r_dest)) { |
| if (MIPS_SINGLEREG(r_src)) { |
| opcode = kMipsFmovs; |
| } else { |
| /* note the operands are swapped for the mtc1 instr */ |
| int t_opnd = r_src; |
| r_src = r_dest; |
| r_dest = t_opnd; |
| opcode = kMipsMtc1; |
| } |
| } else { |
| DCHECK(MIPS_SINGLEREG(r_src)); |
| opcode = kMipsMfc1; |
| } |
| } |
| LIR* res = RawLIR(current_dalvik_offset_, opcode, r_src, r_dest); |
| if (!(cu_->disable_opt & (1 << kSafeOptimizations)) && r_dest == r_src) { |
| res->flags.is_nop = true; |
| } |
| return res; |
| } |
| |
| bool MipsMir2Lir::InexpensiveConstantInt(int32_t value) { |
| return ((value == 0) || IsUint(16, value) || ((value < 0) && (value >= -32768))); |
| } |
| |
| bool MipsMir2Lir::InexpensiveConstantFloat(int32_t value) { |
| return false; // TUNING |
| } |
| |
| bool MipsMir2Lir::InexpensiveConstantLong(int64_t value) { |
| return false; // TUNING |
| } |
| |
| bool MipsMir2Lir::InexpensiveConstantDouble(int64_t value) { |
| return false; // TUNING |
| } |
| |
| /* |
| * Load a immediate using a shortcut if possible; otherwise |
| * grab from the per-translation literal pool. If target is |
| * a high register, build constant into a low register and copy. |
| * |
| * No additional register clobbering operation performed. Use this version when |
| * 1) r_dest is freshly returned from AllocTemp or |
| * 2) The codegen is under fixed register usage |
| */ |
| LIR* MipsMir2Lir::LoadConstantNoClobber(int r_dest, int value) { |
| LIR *res; |
| |
| int r_dest_save = r_dest; |
| int is_fp_reg = MIPS_FPREG(r_dest); |
| if (is_fp_reg) { |
| DCHECK(MIPS_SINGLEREG(r_dest)); |
| r_dest = AllocTemp(); |
| } |
| |
| /* See if the value can be constructed cheaply */ |
| if (value == 0) { |
| res = NewLIR2(kMipsMove, r_dest, r_ZERO); |
| } else if ((value > 0) && (value <= 65535)) { |
| res = NewLIR3(kMipsOri, r_dest, r_ZERO, value); |
| } else if ((value < 0) && (value >= -32768)) { |
| res = NewLIR3(kMipsAddiu, r_dest, r_ZERO, value); |
| } else { |
| res = NewLIR2(kMipsLui, r_dest, value>>16); |
| if (value & 0xffff) |
| NewLIR3(kMipsOri, r_dest, r_dest, value); |
| } |
| |
| if (is_fp_reg) { |
| NewLIR2(kMipsMtc1, r_dest, r_dest_save); |
| FreeTemp(r_dest); |
| } |
| |
| return res; |
| } |
| |
| LIR* MipsMir2Lir::OpUnconditionalBranch(LIR* target) { |
| LIR* res = NewLIR1(kMipsB, 0 /* offset to be patched during assembly*/); |
| res->target = target; |
| return res; |
| } |
| |
| LIR* MipsMir2Lir::OpReg(OpKind op, int r_dest_src) { |
| MipsOpCode opcode = kMipsNop; |
| switch (op) { |
| case kOpBlx: |
| opcode = kMipsJalr; |
| break; |
| case kOpBx: |
| return NewLIR1(kMipsJr, r_dest_src); |
| break; |
| default: |
| LOG(FATAL) << "Bad case in OpReg"; |
| } |
| return NewLIR2(opcode, r_RA, r_dest_src); |
| } |
| |
| LIR* MipsMir2Lir::OpRegImm(OpKind op, int r_dest_src1, |
| int value) { |
| LIR *res; |
| bool neg = (value < 0); |
| int abs_value = (neg) ? -value : value; |
| bool short_form = (abs_value & 0xff) == abs_value; |
| MipsOpCode opcode = kMipsNop; |
| switch (op) { |
| case kOpAdd: |
| return OpRegRegImm(op, r_dest_src1, r_dest_src1, value); |
| break; |
| case kOpSub: |
| return OpRegRegImm(op, r_dest_src1, r_dest_src1, value); |
| break; |
| default: |
| LOG(FATAL) << "Bad case in OpRegImm"; |
| break; |
| } |
| if (short_form) { |
| res = NewLIR2(opcode, r_dest_src1, abs_value); |
| } else { |
| int r_scratch = AllocTemp(); |
| res = LoadConstant(r_scratch, value); |
| if (op == kOpCmp) |
| NewLIR2(opcode, r_dest_src1, r_scratch); |
| else |
| NewLIR3(opcode, r_dest_src1, r_dest_src1, r_scratch); |
| } |
| return res; |
| } |
| |
| LIR* MipsMir2Lir::OpRegRegReg(OpKind op, int r_dest, int r_src1, int r_src2) { |
| MipsOpCode opcode = kMipsNop; |
| switch (op) { |
| case kOpAdd: |
| opcode = kMipsAddu; |
| break; |
| case kOpSub: |
| opcode = kMipsSubu; |
| break; |
| case kOpAnd: |
| opcode = kMipsAnd; |
| break; |
| case kOpMul: |
| opcode = kMipsMul; |
| break; |
| case kOpOr: |
| opcode = kMipsOr; |
| break; |
| case kOpXor: |
| opcode = kMipsXor; |
| break; |
| case kOpLsl: |
| opcode = kMipsSllv; |
| break; |
| case kOpLsr: |
| opcode = kMipsSrlv; |
| break; |
| case kOpAsr: |
| opcode = kMipsSrav; |
| break; |
| case kOpAdc: |
| case kOpSbc: |
| LOG(FATAL) << "No carry bit on MIPS"; |
| break; |
| default: |
| LOG(FATAL) << "bad case in OpRegRegReg"; |
| break; |
| } |
| return NewLIR3(opcode, r_dest, r_src1, r_src2); |
| } |
| |
| LIR* MipsMir2Lir::OpRegRegImm(OpKind op, int r_dest, int r_src1, int value) { |
| LIR *res; |
| MipsOpCode opcode = kMipsNop; |
| bool short_form = true; |
| |
| switch (op) { |
| case kOpAdd: |
| if (IS_SIMM16(value)) { |
| opcode = kMipsAddiu; |
| } else { |
| short_form = false; |
| opcode = kMipsAddu; |
| } |
| break; |
| case kOpSub: |
| if (IS_SIMM16((-value))) { |
| value = -value; |
| opcode = kMipsAddiu; |
| } else { |
| short_form = false; |
| opcode = kMipsSubu; |
| } |
| break; |
| case kOpLsl: |
| DCHECK(value >= 0 && value <= 31); |
| opcode = kMipsSll; |
| break; |
| case kOpLsr: |
| DCHECK(value >= 0 && value <= 31); |
| opcode = kMipsSrl; |
| break; |
| case kOpAsr: |
| DCHECK(value >= 0 && value <= 31); |
| opcode = kMipsSra; |
| break; |
| case kOpAnd: |
| if (IS_UIMM16((value))) { |
| opcode = kMipsAndi; |
| } else { |
| short_form = false; |
| opcode = kMipsAnd; |
| } |
| break; |
| case kOpOr: |
| if (IS_UIMM16((value))) { |
| opcode = kMipsOri; |
| } else { |
| short_form = false; |
| opcode = kMipsOr; |
| } |
| break; |
| case kOpXor: |
| if (IS_UIMM16((value))) { |
| opcode = kMipsXori; |
| } else { |
| short_form = false; |
| opcode = kMipsXor; |
| } |
| break; |
| case kOpMul: |
| short_form = false; |
| opcode = kMipsMul; |
| break; |
| default: |
| LOG(FATAL) << "Bad case in OpRegRegImm"; |
| break; |
| } |
| |
| if (short_form) { |
| res = NewLIR3(opcode, r_dest, r_src1, value); |
| } else { |
| if (r_dest != r_src1) { |
| res = LoadConstant(r_dest, value); |
| NewLIR3(opcode, r_dest, r_src1, r_dest); |
| } else { |
| int r_scratch = AllocTemp(); |
| res = LoadConstant(r_scratch, value); |
| NewLIR3(opcode, r_dest, r_src1, r_scratch); |
| } |
| } |
| return res; |
| } |
| |
| LIR* MipsMir2Lir::OpRegReg(OpKind op, int r_dest_src1, int r_src2) { |
| MipsOpCode opcode = kMipsNop; |
| LIR *res; |
| switch (op) { |
| case kOpMov: |
| opcode = kMipsMove; |
| break; |
| case kOpMvn: |
| return NewLIR3(kMipsNor, r_dest_src1, r_src2, r_ZERO); |
| case kOpNeg: |
| return NewLIR3(kMipsSubu, r_dest_src1, r_ZERO, r_src2); |
| case kOpAdd: |
| case kOpAnd: |
| case kOpMul: |
| case kOpOr: |
| case kOpSub: |
| case kOpXor: |
| return OpRegRegReg(op, r_dest_src1, r_dest_src1, r_src2); |
| case kOp2Byte: |
| #if __mips_isa_rev >= 2 |
| res = NewLIR2(kMipsSeb, r_dest_src1, r_src2); |
| #else |
| res = OpRegRegImm(kOpLsl, r_dest_src1, r_src2, 24); |
| OpRegRegImm(kOpAsr, r_dest_src1, r_dest_src1, 24); |
| #endif |
| return res; |
| case kOp2Short: |
| #if __mips_isa_rev >= 2 |
| res = NewLIR2(kMipsSeh, r_dest_src1, r_src2); |
| #else |
| res = OpRegRegImm(kOpLsl, r_dest_src1, r_src2, 16); |
| OpRegRegImm(kOpAsr, r_dest_src1, r_dest_src1, 16); |
| #endif |
| return res; |
| case kOp2Char: |
| return NewLIR3(kMipsAndi, r_dest_src1, r_src2, 0xFFFF); |
| default: |
| LOG(FATAL) << "Bad case in OpRegReg"; |
| break; |
| } |
| return NewLIR2(opcode, r_dest_src1, r_src2); |
| } |
| |
| LIR* MipsMir2Lir::LoadConstantWide(int r_dest_lo, int r_dest_hi, int64_t value) { |
| LIR *res; |
| res = LoadConstantNoClobber(r_dest_lo, Low32Bits(value)); |
| LoadConstantNoClobber(r_dest_hi, High32Bits(value)); |
| return res; |
| } |
| |
| /* Load value from base + scaled index. */ |
| LIR* MipsMir2Lir::LoadBaseIndexed(int rBase, int r_index, int r_dest, |
| int scale, OpSize size) { |
| LIR *first = NULL; |
| LIR *res; |
| MipsOpCode opcode = kMipsNop; |
| int t_reg = AllocTemp(); |
| |
| if (MIPS_FPREG(r_dest)) { |
| DCHECK(MIPS_SINGLEREG(r_dest)); |
| DCHECK((size == kWord) || (size == kSingle)); |
| size = kSingle; |
| } else { |
| if (size == kSingle) |
| size = kWord; |
| } |
| |
| if (!scale) { |
| first = NewLIR3(kMipsAddu, t_reg , rBase, r_index); |
| } else { |
| first = OpRegRegImm(kOpLsl, t_reg, r_index, scale); |
| NewLIR3(kMipsAddu, t_reg , rBase, t_reg); |
| } |
| |
| switch (size) { |
| case kSingle: |
| opcode = kMipsFlwc1; |
| break; |
| case kWord: |
| opcode = kMipsLw; |
| break; |
| case kUnsignedHalf: |
| opcode = kMipsLhu; |
| break; |
| case kSignedHalf: |
| opcode = kMipsLh; |
| break; |
| case kUnsignedByte: |
| opcode = kMipsLbu; |
| break; |
| case kSignedByte: |
| opcode = kMipsLb; |
| break; |
| default: |
| LOG(FATAL) << "Bad case in LoadBaseIndexed"; |
| } |
| |
| res = NewLIR3(opcode, r_dest, 0, t_reg); |
| FreeTemp(t_reg); |
| return (first) ? first : res; |
| } |
| |
| /* store value base base + scaled index. */ |
| LIR* MipsMir2Lir::StoreBaseIndexed(int rBase, int r_index, int r_src, |
| int scale, OpSize size) { |
| LIR *first = NULL; |
| MipsOpCode opcode = kMipsNop; |
| int r_new_index = r_index; |
| int t_reg = AllocTemp(); |
| |
| if (MIPS_FPREG(r_src)) { |
| DCHECK(MIPS_SINGLEREG(r_src)); |
| DCHECK((size == kWord) || (size == kSingle)); |
| size = kSingle; |
| } else { |
| if (size == kSingle) |
| size = kWord; |
| } |
| |
| if (!scale) { |
| first = NewLIR3(kMipsAddu, t_reg , rBase, r_index); |
| } else { |
| first = OpRegRegImm(kOpLsl, t_reg, r_index, scale); |
| NewLIR3(kMipsAddu, t_reg , rBase, t_reg); |
| } |
| |
| switch (size) { |
| case kSingle: |
| opcode = kMipsFswc1; |
| break; |
| case kWord: |
| opcode = kMipsSw; |
| break; |
| case kUnsignedHalf: |
| case kSignedHalf: |
| opcode = kMipsSh; |
| break; |
| case kUnsignedByte: |
| case kSignedByte: |
| opcode = kMipsSb; |
| break; |
| default: |
| LOG(FATAL) << "Bad case in StoreBaseIndexed"; |
| } |
| NewLIR3(opcode, r_src, 0, t_reg); |
| FreeTemp(r_new_index); |
| return first; |
| } |
| |
| LIR* MipsMir2Lir::LoadBaseDispBody(int rBase, int displacement, int r_dest, |
| int r_dest_hi, OpSize size, int s_reg) { |
| /* |
| * Load value from base + displacement. Optionally perform null check |
| * on base (which must have an associated s_reg and MIR). If not |
| * performing null check, incoming MIR can be null. IMPORTANT: this |
| * code must not allocate any new temps. If a new register is needed |
| * and base and dest are the same, spill some other register to |
| * rlp and then restore. |
| */ |
| LIR *res; |
| LIR *load = NULL; |
| LIR *load2 = NULL; |
| MipsOpCode opcode = kMipsNop; |
| bool short_form = IS_SIMM16(displacement); |
| bool pair = false; |
| |
| switch (size) { |
| case kLong: |
| case kDouble: |
| pair = true; |
| opcode = kMipsLw; |
| if (MIPS_FPREG(r_dest)) { |
| opcode = kMipsFlwc1; |
| if (MIPS_DOUBLEREG(r_dest)) { |
| r_dest = r_dest - MIPS_FP_DOUBLE; |
| } else { |
| DCHECK(MIPS_FPREG(r_dest_hi)); |
| DCHECK(r_dest == (r_dest_hi - 1)); |
| } |
| r_dest_hi = r_dest + 1; |
| } |
| short_form = IS_SIMM16_2WORD(displacement); |
| DCHECK_EQ((displacement & 0x3), 0); |
| break; |
| case kWord: |
| case kSingle: |
| opcode = kMipsLw; |
| if (MIPS_FPREG(r_dest)) { |
| opcode = kMipsFlwc1; |
| DCHECK(MIPS_SINGLEREG(r_dest)); |
| } |
| DCHECK_EQ((displacement & 0x3), 0); |
| break; |
| case kUnsignedHalf: |
| opcode = kMipsLhu; |
| DCHECK_EQ((displacement & 0x1), 0); |
| break; |
| case kSignedHalf: |
| opcode = kMipsLh; |
| DCHECK_EQ((displacement & 0x1), 0); |
| break; |
| case kUnsignedByte: |
| opcode = kMipsLbu; |
| break; |
| case kSignedByte: |
| opcode = kMipsLb; |
| break; |
| default: |
| LOG(FATAL) << "Bad case in LoadBaseIndexedBody"; |
| } |
| |
| if (short_form) { |
| if (!pair) { |
| load = res = NewLIR3(opcode, r_dest, displacement, rBase); |
| } else { |
| load = res = NewLIR3(opcode, r_dest, |
| displacement + LOWORD_OFFSET, rBase); |
| load2 = NewLIR3(opcode, r_dest_hi, |
| displacement + HIWORD_OFFSET, rBase); |
| } |
| } else { |
| if (pair) { |
| int r_tmp = AllocFreeTemp(); |
| res = OpRegRegImm(kOpAdd, r_tmp, rBase, displacement); |
| load = NewLIR3(opcode, r_dest, LOWORD_OFFSET, r_tmp); |
| load2 = NewLIR3(opcode, r_dest_hi, HIWORD_OFFSET, r_tmp); |
| FreeTemp(r_tmp); |
| } else { |
| int r_tmp = (rBase == r_dest) ? AllocFreeTemp() : r_dest; |
| res = OpRegRegImm(kOpAdd, r_tmp, rBase, displacement); |
| load = NewLIR3(opcode, r_dest, 0, r_tmp); |
| if (r_tmp != r_dest) |
| FreeTemp(r_tmp); |
| } |
| } |
| |
| if (rBase == rMIPS_SP) { |
| AnnotateDalvikRegAccess(load, (displacement + (pair ? LOWORD_OFFSET : 0)) >> 2, |
| true /* is_load */, pair /* is64bit */); |
| if (pair) { |
| AnnotateDalvikRegAccess(load2, (displacement + HIWORD_OFFSET) >> 2, |
| true /* is_load */, pair /* is64bit */); |
| } |
| } |
| return load; |
| } |
| |
| LIR* MipsMir2Lir::LoadBaseDisp(int rBase, int displacement, int r_dest, |
| OpSize size, int s_reg) { |
| return LoadBaseDispBody(rBase, displacement, r_dest, -1, |
| size, s_reg); |
| } |
| |
| LIR* MipsMir2Lir::LoadBaseDispWide(int rBase, int displacement, |
| int r_dest_lo, int r_dest_hi, int s_reg) { |
| return LoadBaseDispBody(rBase, displacement, r_dest_lo, r_dest_hi, kLong, s_reg); |
| } |
| |
| LIR* MipsMir2Lir::StoreBaseDispBody(int rBase, int displacement, |
| int r_src, int r_src_hi, OpSize size) { |
| LIR *res; |
| LIR *store = NULL; |
| LIR *store2 = NULL; |
| MipsOpCode opcode = kMipsNop; |
| bool short_form = IS_SIMM16(displacement); |
| bool pair = false; |
| |
| switch (size) { |
| case kLong: |
| case kDouble: |
| pair = true; |
| opcode = kMipsSw; |
| if (MIPS_FPREG(r_src)) { |
| opcode = kMipsFswc1; |
| if (MIPS_DOUBLEREG(r_src)) { |
| r_src = r_src - MIPS_FP_DOUBLE; |
| } else { |
| DCHECK(MIPS_FPREG(r_src_hi)); |
| DCHECK_EQ(r_src, (r_src_hi - 1)); |
| } |
| r_src_hi = r_src + 1; |
| } |
| short_form = IS_SIMM16_2WORD(displacement); |
| DCHECK_EQ((displacement & 0x3), 0); |
| break; |
| case kWord: |
| case kSingle: |
| opcode = kMipsSw; |
| if (MIPS_FPREG(r_src)) { |
| opcode = kMipsFswc1; |
| DCHECK(MIPS_SINGLEREG(r_src)); |
| } |
| DCHECK_EQ((displacement & 0x3), 0); |
| break; |
| case kUnsignedHalf: |
| case kSignedHalf: |
| opcode = kMipsSh; |
| DCHECK_EQ((displacement & 0x1), 0); |
| break; |
| case kUnsignedByte: |
| case kSignedByte: |
| opcode = kMipsSb; |
| break; |
| default: |
| LOG(FATAL) << "Bad case in StoreBaseIndexedBody"; |
| } |
| |
| if (short_form) { |
| if (!pair) { |
| store = res = NewLIR3(opcode, r_src, displacement, rBase); |
| } else { |
| store = res = NewLIR3(opcode, r_src, displacement + LOWORD_OFFSET, |
| rBase); |
| store2 = NewLIR3(opcode, r_src_hi, displacement + HIWORD_OFFSET, |
| rBase); |
| } |
| } else { |
| int r_scratch = AllocTemp(); |
| res = OpRegRegImm(kOpAdd, r_scratch, rBase, displacement); |
| if (!pair) { |
| store = NewLIR3(opcode, r_src, 0, r_scratch); |
| } else { |
| store = NewLIR3(opcode, r_src, LOWORD_OFFSET, r_scratch); |
| store2 = NewLIR3(opcode, r_src_hi, HIWORD_OFFSET, r_scratch); |
| } |
| FreeTemp(r_scratch); |
| } |
| |
| if (rBase == rMIPS_SP) { |
| AnnotateDalvikRegAccess(store, (displacement + (pair ? LOWORD_OFFSET : 0)) >> 2, |
| false /* is_load */, pair /* is64bit */); |
| if (pair) { |
| AnnotateDalvikRegAccess(store2, (displacement + HIWORD_OFFSET) >> 2, |
| false /* is_load */, pair /* is64bit */); |
| } |
| } |
| |
| return res; |
| } |
| |
| LIR* MipsMir2Lir::StoreBaseDisp(int rBase, int displacement, int r_src, |
| OpSize size) { |
| return StoreBaseDispBody(rBase, displacement, r_src, -1, size); |
| } |
| |
| LIR* MipsMir2Lir::StoreBaseDispWide(int rBase, int displacement, |
| int r_src_lo, int r_src_hi) { |
| return StoreBaseDispBody(rBase, displacement, r_src_lo, r_src_hi, kLong); |
| } |
| |
| LIR* MipsMir2Lir::OpThreadMem(OpKind op, int thread_offset) { |
| LOG(FATAL) << "Unexpected use of OpThreadMem for MIPS"; |
| return NULL; |
| } |
| |
| LIR* MipsMir2Lir::OpMem(OpKind op, int rBase, int disp) { |
| LOG(FATAL) << "Unexpected use of OpMem for MIPS"; |
| return NULL; |
| } |
| |
| LIR* MipsMir2Lir::StoreBaseIndexedDisp(int rBase, int r_index, int scale, int displacement, |
| int r_src, int r_src_hi, OpSize size, int s_reg) { |
| LOG(FATAL) << "Unexpected use of StoreBaseIndexedDisp for MIPS"; |
| return NULL; |
| } |
| |
| LIR* MipsMir2Lir::OpRegMem(OpKind op, int r_dest, int rBase, |
| int offset) { |
| LOG(FATAL) << "Unexpected use of OpRegMem for MIPS"; |
| return NULL; |
| } |
| |
| LIR* MipsMir2Lir::LoadBaseIndexedDisp(int rBase, int r_index, int scale, int displacement, |
| int r_dest, int r_dest_hi, OpSize size, int s_reg) { |
| LOG(FATAL) << "Unexpected use of LoadBaseIndexedDisp for MIPS"; |
| return NULL; |
| } |
| |
| LIR* MipsMir2Lir::OpCondBranch(ConditionCode cc, LIR* target) { |
| LOG(FATAL) << "Unexpected use of OpCondBranch for MIPS"; |
| return NULL; |
| } |
| |
| } // namespace art |