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1 //===- subzero/src/IceTargetLoweringARM32.cpp - ARM32 lowering ------------===// | 1 //===- subzero/src/IceTargetLoweringARM32.cpp - ARM32 lowering ------------===// |
2 // | 2 // |
3 // The Subzero Code Generator | 3 // The Subzero Code Generator |
4 // | 4 // |
5 // This file is distributed under the University of Illinois Open Source | 5 // This file is distributed under the University of Illinois Open Source |
6 // License. See LICENSE.TXT for details. | 6 // License. See LICENSE.TXT for details. |
7 // | 7 // |
8 //===----------------------------------------------------------------------===// | 8 //===----------------------------------------------------------------------===// |
9 /// | 9 /// |
10 /// \file | 10 /// \file |
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3143 assert(isScalarFloatingType(Ty)); | 3143 assert(isScalarFloatingType(Ty)); |
3144 // Load floats/doubles from literal pool. | 3144 // Load floats/doubles from literal pool. |
3145 // TODO(jvoung): Allow certain immediates to be encoded directly in an | 3145 // TODO(jvoung): Allow certain immediates to be encoded directly in an |
3146 // operand. See Table A7-18 of the ARM manual: "Floating-point modified | 3146 // operand. See Table A7-18 of the ARM manual: "Floating-point modified |
3147 // immediate constants". Or, for 32-bit floating point numbers, just | 3147 // immediate constants". Or, for 32-bit floating point numbers, just |
3148 // encode the raw bits into a movw/movt pair to GPR, and vmov to an SREG, | 3148 // encode the raw bits into a movw/movt pair to GPR, and vmov to an SREG, |
3149 // instead of using a movw/movt pair to get the const-pool address then | 3149 // instead of using a movw/movt pair to get the const-pool address then |
3150 // loading to SREG. | 3150 // loading to SREG. |
3151 std::string Buffer; | 3151 std::string Buffer; |
3152 llvm::raw_string_ostream StrBuf(Buffer); | 3152 llvm::raw_string_ostream StrBuf(Buffer); |
3153 llvm::cast<Constant>(From)->emitPoolLabel(StrBuf); | 3153 llvm::cast<Constant>(From)->emitPoolLabel(StrBuf, Ctx); |
3154 llvm::cast<Constant>(From)->setShouldBePooled(true); | 3154 llvm::cast<Constant>(From)->setShouldBePooled(true); |
3155 Constant *Offset = Ctx->getConstantSym(0, StrBuf.str(), true); | 3155 Constant *Offset = Ctx->getConstantSym(0, StrBuf.str(), true); |
3156 Variable *BaseReg = makeReg(getPointerType()); | 3156 Variable *BaseReg = makeReg(getPointerType()); |
3157 _movw(BaseReg, Offset); | 3157 _movw(BaseReg, Offset); |
3158 _movt(BaseReg, Offset); | 3158 _movt(BaseReg, Offset); |
3159 From = formMemoryOperand(BaseReg, Ty); | 3159 From = formMemoryOperand(BaseReg, Ty); |
3160 return copyToReg(From, RegNum); | 3160 return copyToReg(From, RegNum); |
3161 } | 3161 } |
3162 } | 3162 } |
3163 | 3163 |
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3351 static_assert(sizeof(double) == sizeof(uint64_t), | 3351 static_assert(sizeof(double) == sizeof(uint64_t), |
3352 "Double should be 8 bytes."); | 3352 "Double should be 8 bytes."); |
3353 return *reinterpret_cast<uint64_t *>(&Value); | 3353 return *reinterpret_cast<uint64_t *>(&Value); |
3354 } | 3354 } |
3355 }; | 3355 }; |
3356 const char ConstantPoolEmitterTraits<double>::AsmTag[] = ".quad"; | 3356 const char ConstantPoolEmitterTraits<double>::AsmTag[] = ".quad"; |
3357 const char ConstantPoolEmitterTraits<double>::TypeName[] = "f64"; | 3357 const char ConstantPoolEmitterTraits<double>::TypeName[] = "f64"; |
3358 | 3358 |
3359 template <typename T> | 3359 template <typename T> |
3360 void emitConstant( | 3360 void emitConstant( |
3361 Ostream &Str, | 3361 Ostream &Str, const GlobalContext *Ctx, |
3362 const typename ConstantPoolEmitterTraits<T>::ConstantType *Const) { | 3362 const typename ConstantPoolEmitterTraits<T>::ConstantType *Const) { |
3363 using Traits = ConstantPoolEmitterTraits<T>; | 3363 using Traits = ConstantPoolEmitterTraits<T>; |
3364 Const->emitPoolLabel(Str); | 3364 Const->emitPoolLabel(Str, Ctx); |
3365 Str << ":\n\t" << Traits::AsmTag << "\t0x"; | 3365 Str << ":\n\t" << Traits::AsmTag << "\t0x"; |
3366 T Value = Const->getValue(); | 3366 T Value = Const->getValue(); |
3367 Str.write_hex(Traits::bitcastToUint64(Value)); | 3367 Str.write_hex(Traits::bitcastToUint64(Value)); |
3368 Str << "\t@" << Traits::TypeName << " " << Value << "\n"; | 3368 Str << "\t@" << Traits::TypeName << " " << Value << "\n"; |
3369 } | 3369 } |
3370 | 3370 |
3371 template <typename T> void emitConstantPool(GlobalContext *Ctx) { | 3371 template <typename T> void emitConstantPool(GlobalContext *Ctx) { |
3372 if (!BuildDefs::dump()) { | 3372 if (!BuildDefs::dump()) { |
3373 return; | 3373 return; |
3374 } | 3374 } |
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3387 if (Ctx->getFlags().shouldReorderPooledConstants()) { | 3387 if (Ctx->getFlags().shouldReorderPooledConstants()) { |
3388 // TODO(jpp): add constant pooling. | 3388 // TODO(jpp): add constant pooling. |
3389 UnimplementedError(Ctx->getFlags()); | 3389 UnimplementedError(Ctx->getFlags()); |
3390 } | 3390 } |
3391 | 3391 |
3392 for (Constant *C : Pool) { | 3392 for (Constant *C : Pool) { |
3393 if (!C->getShouldBePooled()) { | 3393 if (!C->getShouldBePooled()) { |
3394 continue; | 3394 continue; |
3395 } | 3395 } |
3396 | 3396 |
3397 emitConstant<T>(Str, llvm::dyn_cast<typename Traits::ConstantType>(C)); | 3397 emitConstant<T>(Str, Ctx, llvm::dyn_cast<typename Traits::ConstantType>(C)); |
3398 } | 3398 } |
3399 } | 3399 } |
3400 } // end of anonymous namespace | 3400 } // end of anonymous namespace |
3401 | 3401 |
3402 void TargetDataARM32::lowerConstants() { | 3402 void TargetDataARM32::lowerConstants() { |
3403 if (Ctx->getFlags().getDisableTranslation()) | 3403 if (Ctx->getFlags().getDisableTranslation()) |
3404 return; | 3404 return; |
3405 switch (Ctx->getFlags().getOutFileType()) { | 3405 switch (Ctx->getFlags().getOutFileType()) { |
3406 case FT_Elf: | 3406 case FT_Elf: |
3407 UnimplementedError(Ctx->getFlags()); | 3407 UnimplementedError(Ctx->getFlags()); |
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3479 << ".eabi_attribute 68, 1 @ Tag_Virtualization_use\n"; | 3479 << ".eabi_attribute 68, 1 @ Tag_Virtualization_use\n"; |
3480 if (CPUFeatures.hasFeature(TargetARM32Features::HWDivArm)) { | 3480 if (CPUFeatures.hasFeature(TargetARM32Features::HWDivArm)) { |
3481 Str << ".eabi_attribute 44, 2 @ Tag_DIV_use\n"; | 3481 Str << ".eabi_attribute 44, 2 @ Tag_DIV_use\n"; |
3482 } | 3482 } |
3483 // Technically R9 is used for TLS with Sandboxing, and we reserve it. | 3483 // Technically R9 is used for TLS with Sandboxing, and we reserve it. |
3484 // However, for compatibility with current NaCl LLVM, don't claim that. | 3484 // However, for compatibility with current NaCl LLVM, don't claim that. |
3485 Str << ".eabi_attribute 14, 3 @ Tag_ABI_PCS_R9_use: Not used\n"; | 3485 Str << ".eabi_attribute 14, 3 @ Tag_ABI_PCS_R9_use: Not used\n"; |
3486 } | 3486 } |
3487 | 3487 |
3488 } // end of namespace Ice | 3488 } // end of namespace Ice |
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