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-rw-r--r--compiler/utils/arm/assembler_arm32.cc1423
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diff --git a/compiler/utils/arm/assembler_arm32.cc b/compiler/utils/arm/assembler_arm32.cc
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index 0000000000..b2bb20fa2d
--- /dev/null
+++ b/compiler/utils/arm/assembler_arm32.cc
@@ -0,0 +1,1423 @@
+/*
+ * Copyright (C) 2014 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 "assembler_arm32.h"
+
+#include "base/logging.h"
+#include "entrypoints/quick/quick_entrypoints.h"
+#include "offsets.h"
+#include "thread.h"
+#include "utils.h"
+
+namespace art {
+namespace arm {
+
+void Arm32Assembler::and_(Register rd, Register rn, const ShifterOperand& so,
+ Condition cond) {
+ EmitType01(cond, so.type(), AND, 0, rn, rd, so);
+}
+
+
+void Arm32Assembler::eor(Register rd, Register rn, const ShifterOperand& so,
+ Condition cond) {
+ EmitType01(cond, so.type(), EOR, 0, rn, rd, so);
+}
+
+
+void Arm32Assembler::sub(Register rd, Register rn, const ShifterOperand& so,
+ Condition cond) {
+ EmitType01(cond, so.type(), SUB, 0, rn, rd, so);
+}
+
+void Arm32Assembler::rsb(Register rd, Register rn, const ShifterOperand& so,
+ Condition cond) {
+ EmitType01(cond, so.type(), RSB, 0, rn, rd, so);
+}
+
+void Arm32Assembler::rsbs(Register rd, Register rn, const ShifterOperand& so,
+ Condition cond) {
+ EmitType01(cond, so.type(), RSB, 1, rn, rd, so);
+}
+
+
+void Arm32Assembler::add(Register rd, Register rn, const ShifterOperand& so,
+ Condition cond) {
+ EmitType01(cond, so.type(), ADD, 0, rn, rd, so);
+}
+
+
+void Arm32Assembler::adds(Register rd, Register rn, const ShifterOperand& so,
+ Condition cond) {
+ EmitType01(cond, so.type(), ADD, 1, rn, rd, so);
+}
+
+
+void Arm32Assembler::subs(Register rd, Register rn, const ShifterOperand& so,
+ Condition cond) {
+ EmitType01(cond, so.type(), SUB, 1, rn, rd, so);
+}
+
+
+void Arm32Assembler::adc(Register rd, Register rn, const ShifterOperand& so,
+ Condition cond) {
+ EmitType01(cond, so.type(), ADC, 0, rn, rd, so);
+}
+
+
+void Arm32Assembler::sbc(Register rd, Register rn, const ShifterOperand& so,
+ Condition cond) {
+ EmitType01(cond, so.type(), SBC, 0, rn, rd, so);
+}
+
+
+void Arm32Assembler::rsc(Register rd, Register rn, const ShifterOperand& so,
+ Condition cond) {
+ EmitType01(cond, so.type(), RSC, 0, rn, rd, so);
+}
+
+
+void Arm32Assembler::tst(Register rn, const ShifterOperand& so, Condition cond) {
+ CHECK_NE(rn, PC); // Reserve tst pc instruction for exception handler marker.
+ EmitType01(cond, so.type(), TST, 1, rn, R0, so);
+}
+
+
+void Arm32Assembler::teq(Register rn, const ShifterOperand& so, Condition cond) {
+ CHECK_NE(rn, PC); // Reserve teq pc instruction for exception handler marker.
+ EmitType01(cond, so.type(), TEQ, 1, rn, R0, so);
+}
+
+
+void Arm32Assembler::cmp(Register rn, const ShifterOperand& so, Condition cond) {
+ EmitType01(cond, so.type(), CMP, 1, rn, R0, so);
+}
+
+
+void Arm32Assembler::cmn(Register rn, const ShifterOperand& so, Condition cond) {
+ EmitType01(cond, so.type(), CMN, 1, rn, R0, so);
+}
+
+
+void Arm32Assembler::orr(Register rd, Register rn,
+ const ShifterOperand& so, Condition cond) {
+ EmitType01(cond, so.type(), ORR, 0, rn, rd, so);
+}
+
+
+void Arm32Assembler::orrs(Register rd, Register rn,
+ const ShifterOperand& so, Condition cond) {
+ EmitType01(cond, so.type(), ORR, 1, rn, rd, so);
+}
+
+
+void Arm32Assembler::mov(Register rd, const ShifterOperand& so, Condition cond) {
+ EmitType01(cond, so.type(), MOV, 0, R0, rd, so);
+}
+
+
+void Arm32Assembler::movs(Register rd, const ShifterOperand& so, Condition cond) {
+ EmitType01(cond, so.type(), MOV, 1, R0, rd, so);
+}
+
+
+void Arm32Assembler::bic(Register rd, Register rn, const ShifterOperand& so,
+ Condition cond) {
+ EmitType01(cond, so.type(), BIC, 0, rn, rd, so);
+}
+
+
+void Arm32Assembler::mvn(Register rd, const ShifterOperand& so, Condition cond) {
+ EmitType01(cond, so.type(), MVN, 0, R0, rd, so);
+}
+
+
+void Arm32Assembler::mvns(Register rd, const ShifterOperand& so, Condition cond) {
+ EmitType01(cond, so.type(), MVN, 1, R0, rd, so);
+}
+
+
+void Arm32Assembler::mul(Register rd, Register rn, Register rm, Condition cond) {
+ // Assembler registers rd, rn, rm are encoded as rn, rm, rs.
+ EmitMulOp(cond, 0, R0, rd, rn, rm);
+}
+
+
+void Arm32Assembler::mla(Register rd, Register rn, Register rm, Register ra,
+ Condition cond) {
+ // Assembler registers rd, rn, rm, ra are encoded as rn, rm, rs, rd.
+ EmitMulOp(cond, B21, ra, rd, rn, rm);
+}
+
+
+void Arm32Assembler::mls(Register rd, Register rn, Register rm, Register ra,
+ Condition cond) {
+ // Assembler registers rd, rn, rm, ra are encoded as rn, rm, rs, rd.
+ EmitMulOp(cond, B22 | B21, ra, rd, rn, rm);
+}
+
+
+void Arm32Assembler::umull(Register rd_lo, Register rd_hi, Register rn,
+ Register rm, Condition cond) {
+ // Assembler registers rd_lo, rd_hi, rn, rm are encoded as rd, rn, rm, rs.
+ EmitMulOp(cond, B23, rd_lo, rd_hi, rn, rm);
+}
+
+
+void Arm32Assembler::sdiv(Register rd, Register rn, Register rm, Condition cond) {
+ CHECK_NE(rd, kNoRegister);
+ CHECK_NE(rn, kNoRegister);
+ CHECK_NE(rm, kNoRegister);
+ CHECK_NE(cond, kNoCondition);
+ int32_t encoding = B26 | B25 | B24 | B20 |
+ B15 | B14 | B13 | B12 |
+ (static_cast<int32_t>(cond) << kConditionShift) |
+ (static_cast<int32_t>(rn) << 0) |
+ (static_cast<int32_t>(rd) << 16) |
+ (static_cast<int32_t>(rm) << 8) |
+ B4;
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::udiv(Register rd, Register rn, Register rm, Condition cond) {
+ CHECK_NE(rd, kNoRegister);
+ CHECK_NE(rn, kNoRegister);
+ CHECK_NE(rm, kNoRegister);
+ CHECK_NE(cond, kNoCondition);
+ int32_t encoding = B26 | B25 | B24 | B21 | B20 |
+ B15 | B14 | B13 | B12 |
+ (static_cast<int32_t>(cond) << kConditionShift) |
+ (static_cast<int32_t>(rn) << 0) |
+ (static_cast<int32_t>(rd) << 16) |
+ (static_cast<int32_t>(rm) << 8) |
+ B4;
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::ldr(Register rd, const Address& ad, Condition cond) {
+ EmitMemOp(cond, true, false, rd, ad);
+}
+
+
+void Arm32Assembler::str(Register rd, const Address& ad, Condition cond) {
+ EmitMemOp(cond, false, false, rd, ad);
+}
+
+
+void Arm32Assembler::ldrb(Register rd, const Address& ad, Condition cond) {
+ EmitMemOp(cond, true, true, rd, ad);
+}
+
+
+void Arm32Assembler::strb(Register rd, const Address& ad, Condition cond) {
+ EmitMemOp(cond, false, true, rd, ad);
+}
+
+
+void Arm32Assembler::ldrh(Register rd, const Address& ad, Condition cond) {
+ EmitMemOpAddressMode3(cond, L | B7 | H | B4, rd, ad);
+}
+
+
+void Arm32Assembler::strh(Register rd, const Address& ad, Condition cond) {
+ EmitMemOpAddressMode3(cond, B7 | H | B4, rd, ad);
+}
+
+
+void Arm32Assembler::ldrsb(Register rd, const Address& ad, Condition cond) {
+ EmitMemOpAddressMode3(cond, L | B7 | B6 | B4, rd, ad);
+}
+
+
+void Arm32Assembler::ldrsh(Register rd, const Address& ad, Condition cond) {
+ EmitMemOpAddressMode3(cond, L | B7 | B6 | H | B4, rd, ad);
+}
+
+
+void Arm32Assembler::ldrd(Register rd, const Address& ad, Condition cond) {
+ CHECK_EQ(rd % 2, 0);
+ EmitMemOpAddressMode3(cond, B7 | B6 | B4, rd, ad);
+}
+
+
+void Arm32Assembler::strd(Register rd, const Address& ad, Condition cond) {
+ CHECK_EQ(rd % 2, 0);
+ EmitMemOpAddressMode3(cond, B7 | B6 | B5 | B4, rd, ad);
+}
+
+
+void Arm32Assembler::ldm(BlockAddressMode am,
+ Register base,
+ RegList regs,
+ Condition cond) {
+ EmitMultiMemOp(cond, am, true, base, regs);
+}
+
+
+void Arm32Assembler::stm(BlockAddressMode am,
+ Register base,
+ RegList regs,
+ Condition cond) {
+ EmitMultiMemOp(cond, am, false, base, regs);
+}
+
+
+void Arm32Assembler::vmovs(SRegister sd, SRegister sm, Condition cond) {
+ EmitVFPsss(cond, B23 | B21 | B20 | B6, sd, S0, sm);
+}
+
+
+void Arm32Assembler::vmovd(DRegister dd, DRegister dm, Condition cond) {
+ EmitVFPddd(cond, B23 | B21 | B20 | B6, dd, D0, dm);
+}
+
+
+bool Arm32Assembler::vmovs(SRegister sd, float s_imm, Condition cond) {
+ uint32_t imm32 = bit_cast<uint32_t, float>(s_imm);
+ if (((imm32 & ((1 << 19) - 1)) == 0) &&
+ ((((imm32 >> 25) & ((1 << 6) - 1)) == (1 << 5)) ||
+ (((imm32 >> 25) & ((1 << 6) - 1)) == ((1 << 5) -1)))) {
+ uint8_t imm8 = ((imm32 >> 31) << 7) | (((imm32 >> 29) & 1) << 6) |
+ ((imm32 >> 19) & ((1 << 6) -1));
+ EmitVFPsss(cond, B23 | B21 | B20 | ((imm8 >> 4)*B16) | (imm8 & 0xf),
+ sd, S0, S0);
+ return true;
+ }
+ return false;
+}
+
+
+bool Arm32Assembler::vmovd(DRegister dd, double d_imm, Condition cond) {
+ uint64_t imm64 = bit_cast<uint64_t, double>(d_imm);
+ if (((imm64 & ((1LL << 48) - 1)) == 0) &&
+ ((((imm64 >> 54) & ((1 << 9) - 1)) == (1 << 8)) ||
+ (((imm64 >> 54) & ((1 << 9) - 1)) == ((1 << 8) -1)))) {
+ uint8_t imm8 = ((imm64 >> 63) << 7) | (((imm64 >> 61) & 1) << 6) |
+ ((imm64 >> 48) & ((1 << 6) -1));
+ EmitVFPddd(cond, B23 | B21 | B20 | ((imm8 >> 4)*B16) | B8 | (imm8 & 0xf),
+ dd, D0, D0);
+ return true;
+ }
+ return false;
+}
+
+
+void Arm32Assembler::vadds(SRegister sd, SRegister sn, SRegister sm,
+ Condition cond) {
+ EmitVFPsss(cond, B21 | B20, sd, sn, sm);
+}
+
+
+void Arm32Assembler::vaddd(DRegister dd, DRegister dn, DRegister dm,
+ Condition cond) {
+ EmitVFPddd(cond, B21 | B20, dd, dn, dm);
+}
+
+
+void Arm32Assembler::vsubs(SRegister sd, SRegister sn, SRegister sm,
+ Condition cond) {
+ EmitVFPsss(cond, B21 | B20 | B6, sd, sn, sm);
+}
+
+
+void Arm32Assembler::vsubd(DRegister dd, DRegister dn, DRegister dm,
+ Condition cond) {
+ EmitVFPddd(cond, B21 | B20 | B6, dd, dn, dm);
+}
+
+
+void Arm32Assembler::vmuls(SRegister sd, SRegister sn, SRegister sm,
+ Condition cond) {
+ EmitVFPsss(cond, B21, sd, sn, sm);
+}
+
+
+void Arm32Assembler::vmuld(DRegister dd, DRegister dn, DRegister dm,
+ Condition cond) {
+ EmitVFPddd(cond, B21, dd, dn, dm);
+}
+
+
+void Arm32Assembler::vmlas(SRegister sd, SRegister sn, SRegister sm,
+ Condition cond) {
+ EmitVFPsss(cond, 0, sd, sn, sm);
+}
+
+
+void Arm32Assembler::vmlad(DRegister dd, DRegister dn, DRegister dm,
+ Condition cond) {
+ EmitVFPddd(cond, 0, dd, dn, dm);
+}
+
+
+void Arm32Assembler::vmlss(SRegister sd, SRegister sn, SRegister sm,
+ Condition cond) {
+ EmitVFPsss(cond, B6, sd, sn, sm);
+}
+
+
+void Arm32Assembler::vmlsd(DRegister dd, DRegister dn, DRegister dm,
+ Condition cond) {
+ EmitVFPddd(cond, B6, dd, dn, dm);
+}
+
+
+void Arm32Assembler::vdivs(SRegister sd, SRegister sn, SRegister sm,
+ Condition cond) {
+ EmitVFPsss(cond, B23, sd, sn, sm);
+}
+
+
+void Arm32Assembler::vdivd(DRegister dd, DRegister dn, DRegister dm,
+ Condition cond) {
+ EmitVFPddd(cond, B23, dd, dn, dm);
+}
+
+
+void Arm32Assembler::vabss(SRegister sd, SRegister sm, Condition cond) {
+ EmitVFPsss(cond, B23 | B21 | B20 | B7 | B6, sd, S0, sm);
+}
+
+
+void Arm32Assembler::vabsd(DRegister dd, DRegister dm, Condition cond) {
+ EmitVFPddd(cond, B23 | B21 | B20 | B7 | B6, dd, D0, dm);
+}
+
+
+void Arm32Assembler::vnegs(SRegister sd, SRegister sm, Condition cond) {
+ EmitVFPsss(cond, B23 | B21 | B20 | B16 | B6, sd, S0, sm);
+}
+
+
+void Arm32Assembler::vnegd(DRegister dd, DRegister dm, Condition cond) {
+ EmitVFPddd(cond, B23 | B21 | B20 | B16 | B6, dd, D0, dm);
+}
+
+
+void Arm32Assembler::vsqrts(SRegister sd, SRegister sm, Condition cond) {
+ EmitVFPsss(cond, B23 | B21 | B20 | B16 | B7 | B6, sd, S0, sm);
+}
+
+void Arm32Assembler::vsqrtd(DRegister dd, DRegister dm, Condition cond) {
+ EmitVFPddd(cond, B23 | B21 | B20 | B16 | B7 | B6, dd, D0, dm);
+}
+
+
+void Arm32Assembler::vcvtsd(SRegister sd, DRegister dm, Condition cond) {
+ EmitVFPsd(cond, B23 | B21 | B20 | B18 | B17 | B16 | B8 | B7 | B6, sd, dm);
+}
+
+
+void Arm32Assembler::vcvtds(DRegister dd, SRegister sm, Condition cond) {
+ EmitVFPds(cond, B23 | B21 | B20 | B18 | B17 | B16 | B7 | B6, dd, sm);
+}
+
+
+void Arm32Assembler::vcvtis(SRegister sd, SRegister sm, Condition cond) {
+ EmitVFPsss(cond, B23 | B21 | B20 | B19 | B18 | B16 | B7 | B6, sd, S0, sm);
+}
+
+
+void Arm32Assembler::vcvtid(SRegister sd, DRegister dm, Condition cond) {
+ EmitVFPsd(cond, B23 | B21 | B20 | B19 | B18 | B16 | B8 | B7 | B6, sd, dm);
+}
+
+
+void Arm32Assembler::vcvtsi(SRegister sd, SRegister sm, Condition cond) {
+ EmitVFPsss(cond, B23 | B21 | B20 | B19 | B7 | B6, sd, S0, sm);
+}
+
+
+void Arm32Assembler::vcvtdi(DRegister dd, SRegister sm, Condition cond) {
+ EmitVFPds(cond, B23 | B21 | B20 | B19 | B8 | B7 | B6, dd, sm);
+}
+
+
+void Arm32Assembler::vcvtus(SRegister sd, SRegister sm, Condition cond) {
+ EmitVFPsss(cond, B23 | B21 | B20 | B19 | B18 | B7 | B6, sd, S0, sm);
+}
+
+
+void Arm32Assembler::vcvtud(SRegister sd, DRegister dm, Condition cond) {
+ EmitVFPsd(cond, B23 | B21 | B20 | B19 | B18 | B8 | B7 | B6, sd, dm);
+}
+
+
+void Arm32Assembler::vcvtsu(SRegister sd, SRegister sm, Condition cond) {
+ EmitVFPsss(cond, B23 | B21 | B20 | B19 | B6, sd, S0, sm);
+}
+
+
+void Arm32Assembler::vcvtdu(DRegister dd, SRegister sm, Condition cond) {
+ EmitVFPds(cond, B23 | B21 | B20 | B19 | B8 | B6, dd, sm);
+}
+
+
+void Arm32Assembler::vcmps(SRegister sd, SRegister sm, Condition cond) {
+ EmitVFPsss(cond, B23 | B21 | B20 | B18 | B6, sd, S0, sm);
+}
+
+
+void Arm32Assembler::vcmpd(DRegister dd, DRegister dm, Condition cond) {
+ EmitVFPddd(cond, B23 | B21 | B20 | B18 | B6, dd, D0, dm);
+}
+
+
+void Arm32Assembler::vcmpsz(SRegister sd, Condition cond) {
+ EmitVFPsss(cond, B23 | B21 | B20 | B18 | B16 | B6, sd, S0, S0);
+}
+
+
+void Arm32Assembler::vcmpdz(DRegister dd, Condition cond) {
+ EmitVFPddd(cond, B23 | B21 | B20 | B18 | B16 | B6, dd, D0, D0);
+}
+
+void Arm32Assembler::b(Label* label, Condition cond) {
+ EmitBranch(cond, label, false);
+}
+
+
+void Arm32Assembler::bl(Label* label, Condition cond) {
+ EmitBranch(cond, label, true);
+}
+
+
+void Arm32Assembler::MarkExceptionHandler(Label* label) {
+ EmitType01(AL, 1, TST, 1, PC, R0, ShifterOperand(0));
+ Label l;
+ b(&l);
+ EmitBranch(AL, label, false);
+ Bind(&l);
+}
+
+
+void Arm32Assembler::Emit(int32_t value) {
+ AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+ buffer_.Emit<int32_t>(value);
+}
+
+
+void Arm32Assembler::EmitType01(Condition cond,
+ int type,
+ Opcode opcode,
+ int set_cc,
+ Register rn,
+ Register rd,
+ const ShifterOperand& so) {
+ CHECK_NE(rd, kNoRegister);
+ CHECK_NE(cond, kNoCondition);
+ int32_t encoding = static_cast<int32_t>(cond) << kConditionShift |
+ type << kTypeShift |
+ static_cast<int32_t>(opcode) << kOpcodeShift |
+ set_cc << kSShift |
+ static_cast<int32_t>(rn) << kRnShift |
+ static_cast<int32_t>(rd) << kRdShift |
+ so.encodingArm();
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::EmitType5(Condition cond, int offset, bool link) {
+ CHECK_NE(cond, kNoCondition);
+ int32_t encoding = static_cast<int32_t>(cond) << kConditionShift |
+ 5 << kTypeShift |
+ (link ? 1 : 0) << kLinkShift;
+ Emit(Arm32Assembler::EncodeBranchOffset(offset, encoding));
+}
+
+
+void Arm32Assembler::EmitMemOp(Condition cond,
+ bool load,
+ bool byte,
+ Register rd,
+ const Address& ad) {
+ CHECK_NE(rd, kNoRegister);
+ CHECK_NE(cond, kNoCondition);
+ const Address& addr = static_cast<const Address&>(ad);
+
+ int32_t encoding = (static_cast<int32_t>(cond) << kConditionShift) |
+ B26 |
+ (load ? L : 0) |
+ (byte ? B : 0) |
+ (static_cast<int32_t>(rd) << kRdShift) |
+ addr.encodingArm();
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::EmitMemOpAddressMode3(Condition cond,
+ int32_t mode,
+ Register rd,
+ const Address& ad) {
+ CHECK_NE(rd, kNoRegister);
+ CHECK_NE(cond, kNoCondition);
+ const Address& addr = static_cast<const Address&>(ad);
+ int32_t encoding = (static_cast<int32_t>(cond) << kConditionShift) |
+ B22 |
+ mode |
+ (static_cast<int32_t>(rd) << kRdShift) |
+ addr.encoding3();
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::EmitMultiMemOp(Condition cond,
+ BlockAddressMode am,
+ bool load,
+ Register base,
+ RegList regs) {
+ CHECK_NE(base, kNoRegister);
+ CHECK_NE(cond, kNoCondition);
+ int32_t encoding = (static_cast<int32_t>(cond) << kConditionShift) |
+ B27 |
+ am |
+ (load ? L : 0) |
+ (static_cast<int32_t>(base) << kRnShift) |
+ regs;
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::EmitShiftImmediate(Condition cond,
+ Shift opcode,
+ Register rd,
+ Register rm,
+ const ShifterOperand& so) {
+ CHECK_NE(cond, kNoCondition);
+ CHECK(so.IsImmediate());
+ int32_t encoding = static_cast<int32_t>(cond) << kConditionShift |
+ static_cast<int32_t>(MOV) << kOpcodeShift |
+ static_cast<int32_t>(rd) << kRdShift |
+ so.encodingArm() << kShiftImmShift |
+ static_cast<int32_t>(opcode) << kShiftShift |
+ static_cast<int32_t>(rm);
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::EmitShiftRegister(Condition cond,
+ Shift opcode,
+ Register rd,
+ Register rm,
+ const ShifterOperand& so) {
+ CHECK_NE(cond, kNoCondition);
+ CHECK(so.IsRegister());
+ int32_t encoding = static_cast<int32_t>(cond) << kConditionShift |
+ static_cast<int32_t>(MOV) << kOpcodeShift |
+ static_cast<int32_t>(rd) << kRdShift |
+ so.encodingArm() << kShiftRegisterShift |
+ static_cast<int32_t>(opcode) << kShiftShift |
+ B4 |
+ static_cast<int32_t>(rm);
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::EmitBranch(Condition cond, Label* label, bool link) {
+ if (label->IsBound()) {
+ EmitType5(cond, label->Position() - buffer_.Size(), link);
+ } else {
+ int position = buffer_.Size();
+ // Use the offset field of the branch instruction for linking the sites.
+ EmitType5(cond, label->position_, link);
+ label->LinkTo(position);
+ }
+}
+
+
+void Arm32Assembler::clz(Register rd, Register rm, Condition cond) {
+ CHECK_NE(rd, kNoRegister);
+ CHECK_NE(rm, kNoRegister);
+ CHECK_NE(cond, kNoCondition);
+ CHECK_NE(rd, PC);
+ CHECK_NE(rm, PC);
+ int32_t encoding = (static_cast<int32_t>(cond) << kConditionShift) |
+ B24 | B22 | B21 | (0xf << 16) |
+ (static_cast<int32_t>(rd) << kRdShift) |
+ (0xf << 8) | B4 | static_cast<int32_t>(rm);
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::movw(Register rd, uint16_t imm16, Condition cond) {
+ CHECK_NE(cond, kNoCondition);
+ int32_t encoding = static_cast<int32_t>(cond) << kConditionShift |
+ B25 | B24 | ((imm16 >> 12) << 16) |
+ static_cast<int32_t>(rd) << kRdShift | (imm16 & 0xfff);
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::movt(Register rd, uint16_t imm16, Condition cond) {
+ CHECK_NE(cond, kNoCondition);
+ int32_t encoding = static_cast<int32_t>(cond) << kConditionShift |
+ B25 | B24 | B22 | ((imm16 >> 12) << 16) |
+ static_cast<int32_t>(rd) << kRdShift | (imm16 & 0xfff);
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::EmitMulOp(Condition cond, int32_t opcode,
+ Register rd, Register rn,
+ Register rm, Register rs) {
+ CHECK_NE(rd, kNoRegister);
+ CHECK_NE(rn, kNoRegister);
+ CHECK_NE(rm, kNoRegister);
+ CHECK_NE(rs, kNoRegister);
+ CHECK_NE(cond, kNoCondition);
+ int32_t encoding = opcode |
+ (static_cast<int32_t>(cond) << kConditionShift) |
+ (static_cast<int32_t>(rn) << kRnShift) |
+ (static_cast<int32_t>(rd) << kRdShift) |
+ (static_cast<int32_t>(rs) << kRsShift) |
+ B7 | B4 |
+ (static_cast<int32_t>(rm) << kRmShift);
+ Emit(encoding);
+}
+
+void Arm32Assembler::ldrex(Register rt, Register rn, Condition cond) {
+ CHECK_NE(rn, kNoRegister);
+ CHECK_NE(rt, kNoRegister);
+ CHECK_NE(cond, kNoCondition);
+ int32_t encoding = (static_cast<int32_t>(cond) << kConditionShift) |
+ B24 |
+ B23 |
+ L |
+ (static_cast<int32_t>(rn) << kLdExRnShift) |
+ (static_cast<int32_t>(rt) << kLdExRtShift) |
+ B11 | B10 | B9 | B8 | B7 | B4 | B3 | B2 | B1 | B0;
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::strex(Register rd,
+ Register rt,
+ Register rn,
+ Condition cond) {
+ CHECK_NE(rn, kNoRegister);
+ CHECK_NE(rd, kNoRegister);
+ CHECK_NE(rt, kNoRegister);
+ CHECK_NE(cond, kNoCondition);
+ int32_t encoding = (static_cast<int32_t>(cond) << kConditionShift) |
+ B24 |
+ B23 |
+ (static_cast<int32_t>(rn) << kStrExRnShift) |
+ (static_cast<int32_t>(rd) << kStrExRdShift) |
+ B11 | B10 | B9 | B8 | B7 | B4 |
+ (static_cast<int32_t>(rt) << kStrExRtShift);
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::clrex(Condition cond) {
+ CHECK_EQ(cond, AL); // This cannot be conditional on ARM.
+ int32_t encoding = (kSpecialCondition << kConditionShift) |
+ B26 | B24 | B22 | B21 | B20 | (0xff << 12) | B4 | 0xf;
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::nop(Condition cond) {
+ CHECK_NE(cond, kNoCondition);
+ int32_t encoding = (static_cast<int32_t>(cond) << kConditionShift) |
+ B25 | B24 | B21 | (0xf << 12);
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::vmovsr(SRegister sn, Register rt, Condition cond) {
+ CHECK_NE(sn, kNoSRegister);
+ CHECK_NE(rt, kNoRegister);
+ CHECK_NE(rt, SP);
+ CHECK_NE(rt, PC);
+ CHECK_NE(cond, kNoCondition);
+ int32_t encoding = (static_cast<int32_t>(cond) << kConditionShift) |
+ B27 | B26 | B25 |
+ ((static_cast<int32_t>(sn) >> 1)*B16) |
+ (static_cast<int32_t>(rt)*B12) | B11 | B9 |
+ ((static_cast<int32_t>(sn) & 1)*B7) | B4;
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::vmovrs(Register rt, SRegister sn, Condition cond) {
+ CHECK_NE(sn, kNoSRegister);
+ CHECK_NE(rt, kNoRegister);
+ CHECK_NE(rt, SP);
+ CHECK_NE(rt, PC);
+ CHECK_NE(cond, kNoCondition);
+ int32_t encoding = (static_cast<int32_t>(cond) << kConditionShift) |
+ B27 | B26 | B25 | B20 |
+ ((static_cast<int32_t>(sn) >> 1)*B16) |
+ (static_cast<int32_t>(rt)*B12) | B11 | B9 |
+ ((static_cast<int32_t>(sn) & 1)*B7) | B4;
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::vmovsrr(SRegister sm, Register rt, Register rt2,
+ Condition cond) {
+ CHECK_NE(sm, kNoSRegister);
+ CHECK_NE(sm, S31);
+ CHECK_NE(rt, kNoRegister);
+ CHECK_NE(rt, SP);
+ CHECK_NE(rt, PC);
+ CHECK_NE(rt2, kNoRegister);
+ CHECK_NE(rt2, SP);
+ CHECK_NE(rt2, PC);
+ CHECK_NE(cond, kNoCondition);
+ int32_t encoding = (static_cast<int32_t>(cond) << kConditionShift) |
+ B27 | B26 | B22 |
+ (static_cast<int32_t>(rt2)*B16) |
+ (static_cast<int32_t>(rt)*B12) | B11 | B9 |
+ ((static_cast<int32_t>(sm) & 1)*B5) | B4 |
+ (static_cast<int32_t>(sm) >> 1);
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::vmovrrs(Register rt, Register rt2, SRegister sm,
+ Condition cond) {
+ CHECK_NE(sm, kNoSRegister);
+ CHECK_NE(sm, S31);
+ CHECK_NE(rt, kNoRegister);
+ CHECK_NE(rt, SP);
+ CHECK_NE(rt, PC);
+ CHECK_NE(rt2, kNoRegister);
+ CHECK_NE(rt2, SP);
+ CHECK_NE(rt2, PC);
+ CHECK_NE(rt, rt2);
+ CHECK_NE(cond, kNoCondition);
+ int32_t encoding = (static_cast<int32_t>(cond) << kConditionShift) |
+ B27 | B26 | B22 | B20 |
+ (static_cast<int32_t>(rt2)*B16) |
+ (static_cast<int32_t>(rt)*B12) | B11 | B9 |
+ ((static_cast<int32_t>(sm) & 1)*B5) | B4 |
+ (static_cast<int32_t>(sm) >> 1);
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::vmovdrr(DRegister dm, Register rt, Register rt2,
+ Condition cond) {
+ CHECK_NE(dm, kNoDRegister);
+ CHECK_NE(rt, kNoRegister);
+ CHECK_NE(rt, SP);
+ CHECK_NE(rt, PC);
+ CHECK_NE(rt2, kNoRegister);
+ CHECK_NE(rt2, SP);
+ CHECK_NE(rt2, PC);
+ CHECK_NE(cond, kNoCondition);
+ int32_t encoding = (static_cast<int32_t>(cond) << kConditionShift) |
+ B27 | B26 | B22 |
+ (static_cast<int32_t>(rt2)*B16) |
+ (static_cast<int32_t>(rt)*B12) | B11 | B9 | B8 |
+ ((static_cast<int32_t>(dm) >> 4)*B5) | B4 |
+ (static_cast<int32_t>(dm) & 0xf);
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::vmovrrd(Register rt, Register rt2, DRegister dm,
+ Condition cond) {
+ CHECK_NE(dm, kNoDRegister);
+ CHECK_NE(rt, kNoRegister);
+ CHECK_NE(rt, SP);
+ CHECK_NE(rt, PC);
+ CHECK_NE(rt2, kNoRegister);
+ CHECK_NE(rt2, SP);
+ CHECK_NE(rt2, PC);
+ CHECK_NE(rt, rt2);
+ CHECK_NE(cond, kNoCondition);
+ int32_t encoding = (static_cast<int32_t>(cond) << kConditionShift) |
+ B27 | B26 | B22 | B20 |
+ (static_cast<int32_t>(rt2)*B16) |
+ (static_cast<int32_t>(rt)*B12) | B11 | B9 | B8 |
+ ((static_cast<int32_t>(dm) >> 4)*B5) | B4 |
+ (static_cast<int32_t>(dm) & 0xf);
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::vldrs(SRegister sd, const Address& ad, Condition cond) {
+ const Address& addr = static_cast<const Address&>(ad);
+ CHECK_NE(sd, kNoSRegister);
+ CHECK_NE(cond, kNoCondition);
+ int32_t encoding = (static_cast<int32_t>(cond) << kConditionShift) |
+ B27 | B26 | B24 | B20 |
+ ((static_cast<int32_t>(sd) & 1)*B22) |
+ ((static_cast<int32_t>(sd) >> 1)*B12) |
+ B11 | B9 | addr.vencoding();
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::vstrs(SRegister sd, const Address& ad, Condition cond) {
+ const Address& addr = static_cast<const Address&>(ad);
+ CHECK_NE(static_cast<Register>(addr.encodingArm() & (0xf << kRnShift)), PC);
+ CHECK_NE(sd, kNoSRegister);
+ CHECK_NE(cond, kNoCondition);
+ int32_t encoding = (static_cast<int32_t>(cond) << kConditionShift) |
+ B27 | B26 | B24 |
+ ((static_cast<int32_t>(sd) & 1)*B22) |
+ ((static_cast<int32_t>(sd) >> 1)*B12) |
+ B11 | B9 | addr.vencoding();
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::vldrd(DRegister dd, const Address& ad, Condition cond) {
+ const Address& addr = static_cast<const Address&>(ad);
+ CHECK_NE(dd, kNoDRegister);
+ CHECK_NE(cond, kNoCondition);
+ int32_t encoding = (static_cast<int32_t>(cond) << kConditionShift) |
+ B27 | B26 | B24 | B20 |
+ ((static_cast<int32_t>(dd) >> 4)*B22) |
+ ((static_cast<int32_t>(dd) & 0xf)*B12) |
+ B11 | B9 | B8 | addr.vencoding();
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::vstrd(DRegister dd, const Address& ad, Condition cond) {
+ const Address& addr = static_cast<const Address&>(ad);
+ CHECK_NE(static_cast<Register>(addr.encodingArm() & (0xf << kRnShift)), PC);
+ CHECK_NE(dd, kNoDRegister);
+ CHECK_NE(cond, kNoCondition);
+ int32_t encoding = (static_cast<int32_t>(cond) << kConditionShift) |
+ B27 | B26 | B24 |
+ ((static_cast<int32_t>(dd) >> 4)*B22) |
+ ((static_cast<int32_t>(dd) & 0xf)*B12) |
+ B11 | B9 | B8 | addr.vencoding();
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::vpushs(SRegister reg, int nregs, Condition cond) {
+ EmitVPushPop(static_cast<uint32_t>(reg), nregs, true, false, cond);
+}
+
+
+void Arm32Assembler::vpushd(DRegister reg, int nregs, Condition cond) {
+ EmitVPushPop(static_cast<uint32_t>(reg), nregs, true, true, cond);
+}
+
+
+void Arm32Assembler::vpops(SRegister reg, int nregs, Condition cond) {
+ EmitVPushPop(static_cast<uint32_t>(reg), nregs, false, false, cond);
+}
+
+
+void Arm32Assembler::vpopd(DRegister reg, int nregs, Condition cond) {
+ EmitVPushPop(static_cast<uint32_t>(reg), nregs, false, true, cond);
+}
+
+
+void Arm32Assembler::EmitVPushPop(uint32_t reg, int nregs, bool push, bool dbl, Condition cond) {
+ CHECK_NE(cond, kNoCondition);
+ CHECK_GT(nregs, 0);
+ uint32_t D;
+ uint32_t Vd;
+ if (dbl) {
+ // Encoded as D:Vd.
+ D = (reg >> 4) & 1;
+ Vd = reg & 0b1111;
+ } else {
+ // Encoded as Vd:D.
+ D = reg & 1;
+ Vd = (reg >> 1) & 0b1111;
+ }
+ int32_t encoding = B27 | B26 | B21 | B19 | B18 | B16 |
+ B11 | B9 |
+ (dbl ? B8 : 0) |
+ (push ? B24 : (B23 | B20)) |
+ static_cast<int32_t>(cond) << kConditionShift |
+ nregs << (dbl ? 1 : 0) |
+ D << 22 |
+ Vd << 12;
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::EmitVFPsss(Condition cond, int32_t opcode,
+ SRegister sd, SRegister sn, SRegister sm) {
+ CHECK_NE(sd, kNoSRegister);
+ CHECK_NE(sn, kNoSRegister);
+ CHECK_NE(sm, kNoSRegister);
+ CHECK_NE(cond, kNoCondition);
+ int32_t encoding = (static_cast<int32_t>(cond) << kConditionShift) |
+ B27 | B26 | B25 | B11 | B9 | opcode |
+ ((static_cast<int32_t>(sd) & 1)*B22) |
+ ((static_cast<int32_t>(sn) >> 1)*B16) |
+ ((static_cast<int32_t>(sd) >> 1)*B12) |
+ ((static_cast<int32_t>(sn) & 1)*B7) |
+ ((static_cast<int32_t>(sm) & 1)*B5) |
+ (static_cast<int32_t>(sm) >> 1);
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::EmitVFPddd(Condition cond, int32_t opcode,
+ DRegister dd, DRegister dn, DRegister dm) {
+ CHECK_NE(dd, kNoDRegister);
+ CHECK_NE(dn, kNoDRegister);
+ CHECK_NE(dm, kNoDRegister);
+ CHECK_NE(cond, kNoCondition);
+ int32_t encoding = (static_cast<int32_t>(cond) << kConditionShift) |
+ B27 | B26 | B25 | B11 | B9 | B8 | opcode |
+ ((static_cast<int32_t>(dd) >> 4)*B22) |
+ ((static_cast<int32_t>(dn) & 0xf)*B16) |
+ ((static_cast<int32_t>(dd) & 0xf)*B12) |
+ ((static_cast<int32_t>(dn) >> 4)*B7) |
+ ((static_cast<int32_t>(dm) >> 4)*B5) |
+ (static_cast<int32_t>(dm) & 0xf);
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::EmitVFPsd(Condition cond, int32_t opcode,
+ SRegister sd, DRegister dm) {
+ CHECK_NE(sd, kNoSRegister);
+ CHECK_NE(dm, kNoDRegister);
+ CHECK_NE(cond, kNoCondition);
+ int32_t encoding = (static_cast<int32_t>(cond) << kConditionShift) |
+ B27 | B26 | B25 | B11 | B9 | opcode |
+ ((static_cast<int32_t>(sd) & 1)*B22) |
+ ((static_cast<int32_t>(sd) >> 1)*B12) |
+ ((static_cast<int32_t>(dm) >> 4)*B5) |
+ (static_cast<int32_t>(dm) & 0xf);
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::EmitVFPds(Condition cond, int32_t opcode,
+ DRegister dd, SRegister sm) {
+ CHECK_NE(dd, kNoDRegister);
+ CHECK_NE(sm, kNoSRegister);
+ CHECK_NE(cond, kNoCondition);
+ int32_t encoding = (static_cast<int32_t>(cond) << kConditionShift) |
+ B27 | B26 | B25 | B11 | B9 | opcode |
+ ((static_cast<int32_t>(dd) >> 4)*B22) |
+ ((static_cast<int32_t>(dd) & 0xf)*B12) |
+ ((static_cast<int32_t>(sm) & 1)*B5) |
+ (static_cast<int32_t>(sm) >> 1);
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::Lsl(Register rd, Register rm, uint32_t shift_imm,
+ Condition cond) {
+ CHECK_NE(shift_imm, 0u); // Do not use Lsl if no shift is wanted.
+ mov(rd, ShifterOperand(rm, LSL, shift_imm), cond);
+}
+
+
+void Arm32Assembler::Lsr(Register rd, Register rm, uint32_t shift_imm,
+ Condition cond) {
+ CHECK_NE(shift_imm, 0u); // Do not use Lsr if no shift is wanted.
+ if (shift_imm == 32) shift_imm = 0; // Comply to UAL syntax.
+ mov(rd, ShifterOperand(rm, LSR, shift_imm), cond);
+}
+
+
+void Arm32Assembler::Asr(Register rd, Register rm, uint32_t shift_imm,
+ Condition cond) {
+ CHECK_NE(shift_imm, 0u); // Do not use Asr if no shift is wanted.
+ if (shift_imm == 32) shift_imm = 0; // Comply to UAL syntax.
+ mov(rd, ShifterOperand(rm, ASR, shift_imm), cond);
+}
+
+
+void Arm32Assembler::Ror(Register rd, Register rm, uint32_t shift_imm,
+ Condition cond) {
+ CHECK_NE(shift_imm, 0u); // Use Rrx instruction.
+ mov(rd, ShifterOperand(rm, ROR, shift_imm), cond);
+}
+
+void Arm32Assembler::Rrx(Register rd, Register rm, Condition cond) {
+ mov(rd, ShifterOperand(rm, ROR, 0), cond);
+}
+
+
+void Arm32Assembler::vmstat(Condition cond) { // VMRS APSR_nzcv, FPSCR
+ CHECK_NE(cond, kNoCondition);
+ int32_t encoding = (static_cast<int32_t>(cond) << kConditionShift) |
+ B27 | B26 | B25 | B23 | B22 | B21 | B20 | B16 |
+ (static_cast<int32_t>(PC)*B12) |
+ B11 | B9 | B4;
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::svc(uint32_t imm24) {
+ CHECK(IsUint(24, imm24)) << imm24;
+ int32_t encoding = (AL << kConditionShift) | B27 | B26 | B25 | B24 | imm24;
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::bkpt(uint16_t imm16) {
+ int32_t encoding = (AL << kConditionShift) | B24 | B21 |
+ ((imm16 >> 4) << 8) | B6 | B5 | B4 | (imm16 & 0xf);
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::blx(Register rm, Condition cond) {
+ CHECK_NE(rm, kNoRegister);
+ CHECK_NE(cond, kNoCondition);
+ int32_t encoding = (static_cast<int32_t>(cond) << kConditionShift) |
+ B24 | B21 | (0xfff << 8) | B5 | B4 |
+ (static_cast<int32_t>(rm) << kRmShift);
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::bx(Register rm, Condition cond) {
+ CHECK_NE(rm, kNoRegister);
+ CHECK_NE(cond, kNoCondition);
+ int32_t encoding = (static_cast<int32_t>(cond) << kConditionShift) |
+ B24 | B21 | (0xfff << 8) | B4 |
+ (static_cast<int32_t>(rm) << kRmShift);
+ Emit(encoding);
+}
+
+
+void Arm32Assembler::Push(Register rd, Condition cond) {
+ str(rd, Address(SP, -kRegisterSize, Address::PreIndex), cond);
+}
+
+
+void Arm32Assembler::Pop(Register rd, Condition cond) {
+ ldr(rd, Address(SP, kRegisterSize, Address::PostIndex), cond);
+}
+
+
+void Arm32Assembler::PushList(RegList regs, Condition cond) {
+ stm(DB_W, SP, regs, cond);
+}
+
+
+void Arm32Assembler::PopList(RegList regs, Condition cond) {
+ ldm(IA_W, SP, regs, cond);
+}
+
+
+void Arm32Assembler::Mov(Register rd, Register rm, Condition cond) {
+ if (rd != rm) {
+ mov(rd, ShifterOperand(rm), cond);
+ }
+}
+
+
+void Arm32Assembler::Bind(Label* label) {
+ CHECK(!label->IsBound());
+ int bound_pc = buffer_.Size();
+ while (label->IsLinked()) {
+ int32_t position = label->Position();
+ int32_t next = buffer_.Load<int32_t>(position);
+ int32_t encoded = Arm32Assembler::EncodeBranchOffset(bound_pc - position, next);
+ buffer_.Store<int32_t>(position, encoded);
+ label->position_ = Arm32Assembler::DecodeBranchOffset(next);
+ }
+ label->BindTo(bound_pc);
+}
+
+
+int32_t Arm32Assembler::EncodeBranchOffset(int offset, int32_t inst) {
+ // The offset is off by 8 due to the way the ARM CPUs read PC.
+ offset -= 8;
+ CHECK_ALIGNED(offset, 4);
+ CHECK(IsInt(POPCOUNT(kBranchOffsetMask), offset)) << offset;
+
+ // Properly preserve only the bits supported in the instruction.
+ offset >>= 2;
+ offset &= kBranchOffsetMask;
+ return (inst & ~kBranchOffsetMask) | offset;
+}
+
+
+int Arm32Assembler::DecodeBranchOffset(int32_t inst) {
+ // Sign-extend, left-shift by 2, then add 8.
+ return ((((inst & kBranchOffsetMask) << 8) >> 6) + 8);
+}
+
+
+void Arm32Assembler::AddConstant(Register rd, int32_t value, Condition cond) {
+ AddConstant(rd, rd, value, cond);
+}
+
+
+void Arm32Assembler::AddConstant(Register rd, Register rn, int32_t value,
+ Condition cond) {
+ if (value == 0) {
+ if (rd != rn) {
+ mov(rd, ShifterOperand(rn), cond);
+ }
+ return;
+ }
+ // We prefer to select the shorter code sequence rather than selecting add for
+ // positive values and sub for negatives ones, which would slightly improve
+ // the readability of generated code for some constants.
+ ShifterOperand shifter_op;
+ if (ShifterOperand::CanHoldArm(value, &shifter_op)) {
+ add(rd, rn, shifter_op, cond);
+ } else if (ShifterOperand::CanHoldArm(-value, &shifter_op)) {
+ sub(rd, rn, shifter_op, cond);
+ } else {
+ CHECK(rn != IP);
+ if (ShifterOperand::CanHoldArm(~value, &shifter_op)) {
+ mvn(IP, shifter_op, cond);
+ add(rd, rn, ShifterOperand(IP), cond);
+ } else if (ShifterOperand::CanHoldArm(~(-value), &shifter_op)) {
+ mvn(IP, shifter_op, cond);
+ sub(rd, rn, ShifterOperand(IP), cond);
+ } else {
+ movw(IP, Low16Bits(value), cond);
+ uint16_t value_high = High16Bits(value);
+ if (value_high != 0) {
+ movt(IP, value_high, cond);
+ }
+ add(rd, rn, ShifterOperand(IP), cond);
+ }
+ }
+}
+
+
+void Arm32Assembler::AddConstantSetFlags(Register rd, Register rn, int32_t value,
+ Condition cond) {
+ ShifterOperand shifter_op;
+ if (ShifterOperand::CanHoldArm(value, &shifter_op)) {
+ adds(rd, rn, shifter_op, cond);
+ } else if (ShifterOperand::CanHoldArm(-value, &shifter_op)) {
+ subs(rd, rn, shifter_op, cond);
+ } else {
+ CHECK(rn != IP);
+ if (ShifterOperand::CanHoldArm(~value, &shifter_op)) {
+ mvn(IP, shifter_op, cond);
+ adds(rd, rn, ShifterOperand(IP), cond);
+ } else if (ShifterOperand::CanHoldArm(~(-value), &shifter_op)) {
+ mvn(IP, shifter_op, cond);
+ subs(rd, rn, ShifterOperand(IP), cond);
+ } else {
+ movw(IP, Low16Bits(value), cond);
+ uint16_t value_high = High16Bits(value);
+ if (value_high != 0) {
+ movt(IP, value_high, cond);
+ }
+ adds(rd, rn, ShifterOperand(IP), cond);
+ }
+ }
+}
+
+
+void Arm32Assembler::LoadImmediate(Register rd, int32_t value, Condition cond) {
+ ShifterOperand shifter_op;
+ if (ShifterOperand::CanHoldArm(value, &shifter_op)) {
+ mov(rd, shifter_op, cond);
+ } else if (ShifterOperand::CanHoldArm(~value, &shifter_op)) {
+ mvn(rd, shifter_op, cond);
+ } else {
+ movw(rd, Low16Bits(value), cond);
+ uint16_t value_high = High16Bits(value);
+ if (value_high != 0) {
+ movt(rd, value_high, cond);
+ }
+ }
+}
+
+
+// Implementation note: this method must emit at most one instruction when
+// Address::CanHoldLoadOffsetArm.
+void Arm32Assembler::LoadFromOffset(LoadOperandType type,
+ Register reg,
+ Register base,
+ int32_t offset,
+ Condition cond) {
+ if (!Address::CanHoldLoadOffsetArm(type, offset)) {
+ CHECK(base != IP);
+ LoadImmediate(IP, offset, cond);
+ add(IP, IP, ShifterOperand(base), cond);
+ base = IP;
+ offset = 0;
+ }
+ CHECK(Address::CanHoldLoadOffsetArm(type, offset));
+ switch (type) {
+ case kLoadSignedByte:
+ ldrsb(reg, Address(base, offset), cond);
+ break;
+ case kLoadUnsignedByte:
+ ldrb(reg, Address(base, offset), cond);
+ break;
+ case kLoadSignedHalfword:
+ ldrsh(reg, Address(base, offset), cond);
+ break;
+ case kLoadUnsignedHalfword:
+ ldrh(reg, Address(base, offset), cond);
+ break;
+ case kLoadWord:
+ ldr(reg, Address(base, offset), cond);
+ break;
+ case kLoadWordPair:
+ ldrd(reg, Address(base, offset), cond);
+ break;
+ default:
+ LOG(FATAL) << "UNREACHABLE";
+ }
+}
+
+
+// Implementation note: this method must emit at most one instruction when
+// Address::CanHoldLoadOffsetArm, as expected by JIT::GuardedLoadFromOffset.
+void Arm32Assembler::LoadSFromOffset(SRegister reg,
+ Register base,
+ int32_t offset,
+ Condition cond) {
+ if (!Address::CanHoldLoadOffsetArm(kLoadSWord, offset)) {
+ CHECK_NE(base, IP);
+ LoadImmediate(IP, offset, cond);
+ add(IP, IP, ShifterOperand(base), cond);
+ base = IP;
+ offset = 0;
+ }
+ CHECK(Address::CanHoldLoadOffsetArm(kLoadSWord, offset));
+ vldrs(reg, Address(base, offset), cond);
+}
+
+
+// Implementation note: this method must emit at most one instruction when
+// Address::CanHoldLoadOffsetArm, as expected by JIT::GuardedLoadFromOffset.
+void Arm32Assembler::LoadDFromOffset(DRegister reg,
+ Register base,
+ int32_t offset,
+ Condition cond) {
+ if (!Address::CanHoldLoadOffsetArm(kLoadDWord, offset)) {
+ CHECK_NE(base, IP);
+ LoadImmediate(IP, offset, cond);
+ add(IP, IP, ShifterOperand(base), cond);
+ base = IP;
+ offset = 0;
+ }
+ CHECK(Address::CanHoldLoadOffsetArm(kLoadDWord, offset));
+ vldrd(reg, Address(base, offset), cond);
+}
+
+
+// Implementation note: this method must emit at most one instruction when
+// Address::CanHoldStoreOffsetArm.
+void Arm32Assembler::StoreToOffset(StoreOperandType type,
+ Register reg,
+ Register base,
+ int32_t offset,
+ Condition cond) {
+ if (!Address::CanHoldStoreOffsetArm(type, offset)) {
+ CHECK(reg != IP);
+ CHECK(base != IP);
+ LoadImmediate(IP, offset, cond);
+ add(IP, IP, ShifterOperand(base), cond);
+ base = IP;
+ offset = 0;
+ }
+ CHECK(Address::CanHoldStoreOffsetArm(type, offset));
+ switch (type) {
+ case kStoreByte:
+ strb(reg, Address(base, offset), cond);
+ break;
+ case kStoreHalfword:
+ strh(reg, Address(base, offset), cond);
+ break;
+ case kStoreWord:
+ str(reg, Address(base, offset), cond);
+ break;
+ case kStoreWordPair:
+ strd(reg, Address(base, offset), cond);
+ break;
+ default:
+ LOG(FATAL) << "UNREACHABLE";
+ }
+}
+
+
+// Implementation note: this method must emit at most one instruction when
+// Address::CanHoldStoreOffsetArm, as expected by JIT::GuardedStoreToOffset.
+void Arm32Assembler::StoreSToOffset(SRegister reg,
+ Register base,
+ int32_t offset,
+ Condition cond) {
+ if (!Address::CanHoldStoreOffsetArm(kStoreSWord, offset)) {
+ CHECK_NE(base, IP);
+ LoadImmediate(IP, offset, cond);
+ add(IP, IP, ShifterOperand(base), cond);
+ base = IP;
+ offset = 0;
+ }
+ CHECK(Address::CanHoldStoreOffsetArm(kStoreSWord, offset));
+ vstrs(reg, Address(base, offset), cond);
+}
+
+
+// Implementation note: this method must emit at most one instruction when
+// Address::CanHoldStoreOffsetArm, as expected by JIT::GuardedStoreSToOffset.
+void Arm32Assembler::StoreDToOffset(DRegister reg,
+ Register base,
+ int32_t offset,
+ Condition cond) {
+ if (!Address::CanHoldStoreOffsetArm(kStoreDWord, offset)) {
+ CHECK_NE(base, IP);
+ LoadImmediate(IP, offset, cond);
+ add(IP, IP, ShifterOperand(base), cond);
+ base = IP;
+ offset = 0;
+ }
+ CHECK(Address::CanHoldStoreOffsetArm(kStoreDWord, offset));
+ vstrd(reg, Address(base, offset), cond);
+}
+
+
+void Arm32Assembler::MemoryBarrier(ManagedRegister mscratch) {
+ CHECK_EQ(mscratch.AsArm().AsCoreRegister(), R12);
+#if ANDROID_SMP != 0
+ int32_t encoding = 0xf57ff05f; // dmb
+ Emit(encoding);
+#endif
+}
+
+
+void Arm32Assembler::cbz(Register rn, Label* target) {
+ LOG(FATAL) << "cbz is not supported on ARM32";
+}
+
+
+void Arm32Assembler::cbnz(Register rn, Label* target) {
+ LOG(FATAL) << "cbnz is not supported on ARM32";
+}
+
+
+void Arm32Assembler::CompareAndBranchIfZero(Register r, Label* label) {
+ cmp(r, ShifterOperand(0));
+ b(label, EQ);
+}
+
+
+void Arm32Assembler::CompareAndBranchIfNonZero(Register r, Label* label) {
+ cmp(r, ShifterOperand(0));
+ b(label, NE);
+}
+
+
+} // namespace arm
+} // namespace art
generated by cgit v1.2.3-59-g8ed1b (git 2.39.0) at 2025-12-11 15:46:09 +0000