| /* |
| * Copyright (C) 2011-2019 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #pragma once |
| |
| #include "MacroAssembler.h" |
| #include <array> |
| #include <wtf/PrintStream.h> |
| |
| namespace JSC { |
| |
| enum NoResultTag { NoResult }; |
| |
| // We use the same conventions in the baseline JIT as in the LLint. If you |
| // change mappings in the GPRInfo, you should change them in the offlineasm |
| // compiler adequately. The register naming conventions are described at the |
| // top of the LowLevelInterpreter.asm file. |
| |
| typedef MacroAssembler::RegisterID GPRReg; |
| static constexpr GPRReg InvalidGPRReg { GPRReg::InvalidGPRReg }; |
| |
| #if ENABLE(ASSEMBLER) |
| |
| #if USE(JSVALUE64) |
| class JSValueRegs { |
| public: |
| constexpr JSValueRegs() |
| : m_gpr(InvalidGPRReg) |
| { |
| } |
| |
| constexpr explicit JSValueRegs(GPRReg gpr) |
| : m_gpr(gpr) |
| { |
| } |
| |
| static JSValueRegs payloadOnly(GPRReg gpr) |
| { |
| return JSValueRegs(gpr); |
| } |
| |
| static JSValueRegs withTwoAvailableRegs(GPRReg gpr, GPRReg) |
| { |
| return JSValueRegs(gpr); |
| } |
| |
| bool operator!() const { return m_gpr == InvalidGPRReg; } |
| explicit operator bool() const { return m_gpr != InvalidGPRReg; } |
| |
| bool operator==(JSValueRegs other) { return m_gpr == other.m_gpr; } |
| bool operator!=(JSValueRegs other) { return !(*this == other); } |
| |
| GPRReg gpr() const { return m_gpr; } |
| GPRReg tagGPR() const { return InvalidGPRReg; } |
| GPRReg payloadGPR() const { return m_gpr; } |
| |
| bool uses(GPRReg gpr) const { return m_gpr == gpr; } |
| |
| void dump(PrintStream&) const; |
| |
| private: |
| GPRReg m_gpr; |
| }; |
| |
| class JSValueSource { |
| public: |
| JSValueSource() |
| : m_offset(notAddress()) |
| , m_base(InvalidGPRReg) |
| { |
| } |
| |
| JSValueSource(JSValueRegs regs) |
| : m_offset(notAddress()) |
| , m_base(regs.gpr()) |
| { |
| } |
| |
| explicit JSValueSource(GPRReg gpr) |
| : m_offset(notAddress()) |
| , m_base(gpr) |
| { |
| } |
| |
| JSValueSource(MacroAssembler::Address address) |
| : m_offset(address.offset) |
| , m_base(address.base) |
| { |
| ASSERT(m_offset != notAddress()); |
| ASSERT(m_base != InvalidGPRReg); |
| } |
| |
| static JSValueSource unboxedCell(GPRReg payloadGPR) |
| { |
| return JSValueSource(payloadGPR); |
| } |
| |
| bool operator!() const { return m_base == InvalidGPRReg; } |
| explicit operator bool() const { return m_base != InvalidGPRReg; } |
| |
| bool isAddress() const { return m_offset != notAddress(); } |
| |
| int32_t offset() const |
| { |
| ASSERT(isAddress()); |
| return m_offset; |
| } |
| |
| GPRReg base() const |
| { |
| ASSERT(isAddress()); |
| return m_base; |
| } |
| |
| GPRReg gpr() const |
| { |
| ASSERT(!isAddress()); |
| return m_base; |
| } |
| |
| GPRReg payloadGPR() const { return gpr(); } |
| |
| JSValueRegs regs() const |
| { |
| return JSValueRegs(gpr()); |
| } |
| |
| MacroAssembler::Address asAddress() const { return MacroAssembler::Address(base(), offset()); } |
| |
| private: |
| static inline int32_t notAddress() { return 0x80000000; } |
| |
| int32_t m_offset; |
| GPRReg m_base; |
| }; |
| #endif // USE(JSVALUE64) |
| |
| #if USE(JSVALUE32_64) |
| class JSValueRegs { |
| public: |
| JSValueRegs() |
| : m_tagGPR(InvalidGPRReg) |
| , m_payloadGPR(InvalidGPRReg) |
| { |
| } |
| |
| JSValueRegs(GPRReg tagGPR, GPRReg payloadGPR) |
| : m_tagGPR(tagGPR) |
| , m_payloadGPR(payloadGPR) |
| { |
| } |
| |
| static JSValueRegs withTwoAvailableRegs(GPRReg gpr1, GPRReg gpr2) |
| { |
| return JSValueRegs(gpr1, gpr2); |
| } |
| |
| static JSValueRegs payloadOnly(GPRReg gpr) |
| { |
| return JSValueRegs(InvalidGPRReg, gpr); |
| } |
| |
| bool operator!() const { return !static_cast<bool>(*this); } |
| explicit operator bool() const |
| { |
| return static_cast<GPRReg>(m_tagGPR) != InvalidGPRReg |
| || static_cast<GPRReg>(m_payloadGPR) != InvalidGPRReg; |
| } |
| |
| bool operator==(JSValueRegs other) const |
| { |
| return m_tagGPR == other.m_tagGPR |
| && m_payloadGPR == other.m_payloadGPR; |
| } |
| bool operator!=(JSValueRegs other) const { return !(*this == other); } |
| |
| GPRReg tagGPR() const { return m_tagGPR; } |
| GPRReg payloadGPR() const { return m_payloadGPR; } |
| GPRReg gpr(WhichValueWord which) const |
| { |
| switch (which) { |
| case TagWord: |
| return tagGPR(); |
| case PayloadWord: |
| return payloadGPR(); |
| } |
| ASSERT_NOT_REACHED(); |
| return tagGPR(); |
| } |
| |
| bool uses(GPRReg gpr) const { return m_tagGPR == gpr || m_payloadGPR == gpr; } |
| |
| void dump(PrintStream&) const; |
| |
| private: |
| GPRReg m_tagGPR; |
| GPRReg m_payloadGPR; |
| }; |
| |
| class JSValueSource { |
| public: |
| JSValueSource() |
| : m_offset(notAddress()) |
| , m_baseOrTag(InvalidGPRReg) |
| , m_payload(InvalidGPRReg) |
| , m_tagType(0) |
| { |
| } |
| |
| JSValueSource(JSValueRegs regs) |
| : m_offset(notAddress()) |
| , m_baseOrTag(regs.tagGPR()) |
| , m_payload(regs.payloadGPR()) |
| , m_tagType(0) |
| { |
| } |
| |
| JSValueSource(GPRReg tagGPR, GPRReg payloadGPR) |
| : m_offset(notAddress()) |
| , m_baseOrTag(tagGPR) |
| , m_payload(payloadGPR) |
| , m_tagType(0) |
| { |
| } |
| |
| JSValueSource(MacroAssembler::Address address) |
| : m_offset(address.offset) |
| , m_baseOrTag(address.base) |
| , m_payload(InvalidGPRReg) |
| , m_tagType(0) |
| { |
| ASSERT(m_offset != notAddress()); |
| ASSERT(m_baseOrTag != InvalidGPRReg); |
| } |
| |
| static JSValueSource unboxedCell(GPRReg payloadGPR) |
| { |
| JSValueSource result; |
| result.m_offset = notAddress(); |
| result.m_baseOrTag = InvalidGPRReg; |
| result.m_payload = payloadGPR; |
| result.m_tagType = static_cast<int8_t>(JSValue::CellTag); |
| return result; |
| } |
| |
| bool operator!() const { return !static_cast<bool>(*this); } |
| explicit operator bool() const |
| { |
| return m_baseOrTag != InvalidGPRReg || m_payload != InvalidGPRReg; |
| } |
| |
| bool isAddress() const |
| { |
| ASSERT(!!*this); |
| return m_offset != notAddress(); |
| } |
| |
| int32_t offset() const |
| { |
| ASSERT(isAddress()); |
| return m_offset; |
| } |
| |
| GPRReg base() const |
| { |
| ASSERT(isAddress()); |
| return m_baseOrTag; |
| } |
| |
| GPRReg tagGPR() const |
| { |
| ASSERT(!isAddress() && m_baseOrTag != InvalidGPRReg); |
| return m_baseOrTag; |
| } |
| |
| GPRReg payloadGPR() const |
| { |
| ASSERT(!isAddress()); |
| return m_payload; |
| } |
| |
| bool hasKnownTag() const |
| { |
| ASSERT(!!*this); |
| ASSERT(!isAddress()); |
| return m_baseOrTag == InvalidGPRReg; |
| } |
| |
| uint32_t tag() const |
| { |
| return static_cast<int32_t>(m_tagType); |
| } |
| |
| JSValueRegs regs() const |
| { |
| return JSValueRegs(tagGPR(), payloadGPR()); |
| } |
| |
| MacroAssembler::Address asAddress(unsigned additionalOffset = 0) const { return MacroAssembler::Address(base(), offset() + additionalOffset); } |
| |
| private: |
| static inline int32_t notAddress() { return 0x80000000; } |
| |
| int32_t m_offset; |
| GPRReg m_baseOrTag; |
| GPRReg m_payload; |
| int8_t m_tagType; // Contains the low bits of the tag. |
| }; |
| #endif // USE(JSVALUE32_64) |
| |
| #if CPU(X86) |
| #define NUMBER_OF_ARGUMENT_REGISTERS 0u |
| #define NUMBER_OF_CALLEE_SAVES_REGISTERS 0u |
| |
| class GPRInfo { |
| public: |
| typedef GPRReg RegisterType; |
| static constexpr unsigned numberOfRegisters = 6; |
| static constexpr unsigned numberOfArgumentRegisters = NUMBER_OF_ARGUMENT_REGISTERS; |
| |
| // Temporary registers. |
| static constexpr GPRReg regT0 = X86Registers::eax; |
| static constexpr GPRReg regT1 = X86Registers::edx; |
| static constexpr GPRReg regT2 = X86Registers::ecx; |
| static constexpr GPRReg regT3 = X86Registers::ebx; // Callee-save |
| static constexpr GPRReg regT4 = X86Registers::esi; // Callee-save |
| static constexpr GPRReg regT5 = X86Registers::edi; // Callee-save |
| static constexpr GPRReg callFrameRegister = X86Registers::ebp; |
| // These constants provide the names for the general purpose argument & return value registers. |
| static constexpr GPRReg argumentGPR0 = X86Registers::ecx; // regT2 |
| static constexpr GPRReg argumentGPR1 = X86Registers::edx; // regT1 |
| static constexpr GPRReg argumentGPR2 = X86Registers::eax; // regT0 |
| static constexpr GPRReg argumentGPR3 = X86Registers::ebx; // regT3 |
| static constexpr GPRReg nonArgGPR0 = X86Registers::esi; // regT4 |
| static constexpr GPRReg returnValueGPR = X86Registers::eax; // regT0 |
| static constexpr GPRReg returnValueGPR2 = X86Registers::edx; // regT1 |
| static constexpr GPRReg nonPreservedNonReturnGPR = X86Registers::ecx; |
| |
| static GPRReg toRegister(unsigned index) |
| { |
| ASSERT(index < numberOfRegisters); |
| static const GPRReg registerForIndex[numberOfRegisters] = { regT0, regT1, regT2, regT3, regT4, regT5 }; |
| return registerForIndex[index]; |
| } |
| |
| static GPRReg toArgumentRegister(unsigned) |
| { |
| UNREACHABLE_FOR_PLATFORM(); |
| return InvalidGPRReg; |
| } |
| |
| static unsigned toIndex(GPRReg reg) |
| { |
| ASSERT(reg != InvalidGPRReg); |
| ASSERT(static_cast<int>(reg) < 8); |
| static const unsigned indexForRegister[8] = { 0, 2, 1, 3, InvalidIndex, InvalidIndex, 4, 5 }; |
| unsigned result = indexForRegister[reg]; |
| return result; |
| } |
| |
| static const char* debugName(GPRReg reg) |
| { |
| ASSERT(reg != InvalidGPRReg); |
| return MacroAssembler::gprName(reg); |
| } |
| |
| static constexpr unsigned InvalidIndex = 0xffffffff; |
| }; |
| |
| #endif // CPU(X86) |
| |
| #if CPU(X86_64) |
| #if !OS(WINDOWS) |
| #define NUMBER_OF_ARGUMENT_REGISTERS 6u |
| #define NUMBER_OF_CALLEE_SAVES_REGISTERS 5u |
| #else |
| #define NUMBER_OF_ARGUMENT_REGISTERS 4u |
| #define NUMBER_OF_CALLEE_SAVES_REGISTERS 7u |
| #endif |
| |
| class GPRInfo { |
| public: |
| typedef GPRReg RegisterType; |
| static constexpr unsigned numberOfRegisters = 11; |
| static constexpr unsigned numberOfArgumentRegisters = NUMBER_OF_ARGUMENT_REGISTERS; |
| |
| // These registers match the baseline JIT. |
| static constexpr GPRReg callFrameRegister = X86Registers::ebp; |
| static constexpr GPRReg numberTagRegister = X86Registers::r14; |
| static constexpr GPRReg notCellMaskRegister = X86Registers::r15; |
| |
| // Temporary registers. |
| static constexpr GPRReg regT0 = X86Registers::eax; |
| #if !OS(WINDOWS) |
| static constexpr GPRReg regT1 = X86Registers::esi; |
| static constexpr GPRReg regT2 = X86Registers::edx; |
| static constexpr GPRReg regT3 = X86Registers::ecx; |
| static constexpr GPRReg regT4 = X86Registers::r8; |
| static constexpr GPRReg regT5 = X86Registers::r10; |
| static constexpr GPRReg regT6 = X86Registers::edi; |
| static constexpr GPRReg regT7 = X86Registers::r9; |
| #else |
| static constexpr GPRReg regT1 = X86Registers::edx; |
| static constexpr GPRReg regT2 = X86Registers::r8; |
| static constexpr GPRReg regT3 = X86Registers::r9; |
| static constexpr GPRReg regT4 = X86Registers::r10; |
| static constexpr GPRReg regT5 = X86Registers::ecx; |
| #endif |
| |
| static constexpr GPRReg regCS0 = X86Registers::ebx; |
| |
| #if !OS(WINDOWS) |
| static constexpr GPRReg regCS1 = X86Registers::r12; |
| static constexpr GPRReg regCS2 = X86Registers::r13; |
| static constexpr GPRReg regCS3 = X86Registers::r14; |
| static constexpr GPRReg regCS4 = X86Registers::r15; |
| #else |
| static constexpr GPRReg regCS1 = X86Registers::esi; |
| static constexpr GPRReg regCS2 = X86Registers::edi; |
| static constexpr GPRReg regCS3 = X86Registers::r12; |
| static constexpr GPRReg regCS4 = X86Registers::r13; |
| static constexpr GPRReg regCS5 = X86Registers::r14; |
| static constexpr GPRReg regCS6 = X86Registers::r15; |
| #endif |
| |
| // These constants provide the names for the general purpose argument & return value registers. |
| #if !OS(WINDOWS) |
| static constexpr GPRReg argumentGPR0 = X86Registers::edi; // regT6 |
| static constexpr GPRReg argumentGPR1 = X86Registers::esi; // regT1 |
| static constexpr GPRReg argumentGPR2 = X86Registers::edx; // regT2 |
| static constexpr GPRReg argumentGPR3 = X86Registers::ecx; // regT3 |
| static constexpr GPRReg argumentGPR4 = X86Registers::r8; // regT4 |
| static constexpr GPRReg argumentGPR5 = X86Registers::r9; // regT7 |
| #else |
| static constexpr GPRReg argumentGPR0 = X86Registers::ecx; // regT5 |
| static constexpr GPRReg argumentGPR1 = X86Registers::edx; // regT1 |
| static constexpr GPRReg argumentGPR2 = X86Registers::r8; // regT2 |
| static constexpr GPRReg argumentGPR3 = X86Registers::r9; // regT3 |
| #endif |
| static constexpr GPRReg nonArgGPR0 = X86Registers::r10; // regT5 (regT4 on Windows) |
| static constexpr GPRReg returnValueGPR = X86Registers::eax; // regT0 |
| static constexpr GPRReg returnValueGPR2 = X86Registers::edx; // regT1 or regT2 |
| static constexpr GPRReg nonPreservedNonReturnGPR = X86Registers::r10; // regT5 (regT4 on Windows) |
| static constexpr GPRReg nonPreservedNonArgumentGPR0 = X86Registers::r10; // regT5 (regT4 on Windows) |
| static constexpr GPRReg nonPreservedNonArgumentGPR1 = X86Registers::eax; |
| static constexpr GPRReg wasmScratchGPR0 = X86Registers::eax; |
| #if !OS(WINDOWS) |
| static constexpr GPRReg wasmScratchGPR1 = X86Registers::r10; |
| #endif |
| |
| // FIXME: I believe that all uses of this are dead in the sense that it just causes the scratch |
| // register allocator to select a different register and potentially spill things. It would be better |
| // if we instead had a more explicit way of saying that we don't have a scratch register. |
| static constexpr GPRReg patchpointScratchRegister = MacroAssembler::s_scratchRegister; |
| |
| static GPRReg toRegister(unsigned index) |
| { |
| ASSERT(index < numberOfRegisters); |
| #if !OS(WINDOWS) |
| static const GPRReg registerForIndex[numberOfRegisters] = { regT0, regT1, regT2, regT3, regT4, regT5, regT6, regT7, regCS0, regCS1, regCS2 }; |
| #else |
| static const GPRReg registerForIndex[numberOfRegisters] = { regT0, regT1, regT2, regT3, regT4, regT5, regCS0, regCS1, regCS2, regCS3, regCS4 }; |
| #endif |
| return registerForIndex[index]; |
| } |
| |
| static GPRReg toArgumentRegister(unsigned index) |
| { |
| ASSERT(index < numberOfArgumentRegisters); |
| #if !OS(WINDOWS) |
| static const GPRReg registerForIndex[numberOfArgumentRegisters] = { argumentGPR0, argumentGPR1, argumentGPR2, argumentGPR3, argumentGPR4, argumentGPR5 }; |
| #else |
| static const GPRReg registerForIndex[numberOfArgumentRegisters] = { argumentGPR0, argumentGPR1, argumentGPR2, argumentGPR3 }; |
| #endif |
| return registerForIndex[index]; |
| } |
| |
| static unsigned toIndex(GPRReg reg) |
| { |
| ASSERT(reg != InvalidGPRReg); |
| ASSERT(static_cast<int>(reg) < 16); |
| #if !OS(WINDOWS) |
| static const unsigned indexForRegister[16] = { 0, 3, 2, 8, InvalidIndex, InvalidIndex, 1, 6, 4, 7, 5, InvalidIndex, 9, 10, InvalidIndex, InvalidIndex }; |
| #else |
| static const unsigned indexForRegister[16] = { 0, 5, 1, 6, InvalidIndex, InvalidIndex, 7, 8, 2, 3, 4, InvalidIndex, 9, 10, InvalidIndex, InvalidIndex }; |
| #endif |
| return indexForRegister[reg]; |
| } |
| |
| static const char* debugName(GPRReg reg) |
| { |
| ASSERT(reg != InvalidGPRReg); |
| return MacroAssembler::gprName(reg); |
| } |
| |
| static const std::array<GPRReg, 3>& reservedRegisters() |
| { |
| static const std::array<GPRReg, 3> reservedRegisters { { |
| MacroAssembler::s_scratchRegister, |
| numberTagRegister, |
| notCellMaskRegister, |
| } }; |
| return reservedRegisters; |
| } |
| |
| static constexpr unsigned InvalidIndex = 0xffffffff; |
| }; |
| |
| #endif // CPU(X86_64) |
| |
| #if CPU(ARM_THUMB2) |
| #define NUMBER_OF_ARGUMENT_REGISTERS 4u |
| #define NUMBER_OF_CALLEE_SAVES_REGISTERS 2u |
| |
| class GPRInfo { |
| public: |
| typedef GPRReg RegisterType; |
| static constexpr unsigned numberOfRegisters = 9; |
| static constexpr unsigned numberOfArgumentRegisters = NUMBER_OF_ARGUMENT_REGISTERS; |
| |
| // Temporary registers. |
| static constexpr GPRReg regT0 = ARMRegisters::r0; |
| static constexpr GPRReg regT1 = ARMRegisters::r1; |
| static constexpr GPRReg regT2 = ARMRegisters::r2; |
| static constexpr GPRReg regT3 = ARMRegisters::r3; |
| static constexpr GPRReg regT4 = ARMRegisters::r8; |
| static constexpr GPRReg regT5 = ARMRegisters::r9; |
| static constexpr GPRReg regT6 = ARMRegisters::r5; |
| static constexpr GPRReg regT7 = ARMRegisters::r4; |
| static constexpr GPRReg regCS0 = ARMRegisters::r11; |
| static constexpr GPRReg regCS1 = ARMRegisters::r10; |
| // These registers match the baseline JIT. |
| static constexpr GPRReg callFrameRegister = ARMRegisters::fp; |
| // These constants provide the names for the general purpose argument & return value registers. |
| static constexpr GPRReg argumentGPR0 = ARMRegisters::r0; // regT0 |
| static constexpr GPRReg argumentGPR1 = ARMRegisters::r1; // regT1 |
| static constexpr GPRReg argumentGPR2 = ARMRegisters::r2; // regT2 |
| static constexpr GPRReg argumentGPR3 = ARMRegisters::r3; // regT3 |
| static constexpr GPRReg nonArgGPR0 = ARMRegisters::r4; // regT7 |
| static constexpr GPRReg returnValueGPR = ARMRegisters::r0; // regT0 |
| static constexpr GPRReg returnValueGPR2 = ARMRegisters::r1; // regT1 |
| static constexpr GPRReg nonPreservedNonReturnGPR = ARMRegisters::r5; |
| |
| static GPRReg toRegister(unsigned index) |
| { |
| ASSERT(index < numberOfRegisters); |
| static const GPRReg registerForIndex[numberOfRegisters] = { regT0, regT1, regT2, regT3, regT4, regT5, regT6, regT7, regCS1 }; |
| return registerForIndex[index]; |
| } |
| |
| static GPRReg toArgumentRegister(unsigned index) |
| { |
| ASSERT(index < numberOfArgumentRegisters); |
| static const GPRReg registerForIndex[numberOfArgumentRegisters] = { argumentGPR0, argumentGPR1, argumentGPR2, argumentGPR3 }; |
| return registerForIndex[index]; |
| } |
| |
| static unsigned toIndex(GPRReg reg) |
| { |
| ASSERT(reg != InvalidGPRReg); |
| ASSERT(static_cast<int>(reg) < 16); |
| static const unsigned indexForRegister[16] = |
| { 0, 1, 2, 3, 7, 6, InvalidIndex, InvalidIndex, 4, 5, 8, InvalidIndex, InvalidIndex, InvalidIndex, InvalidIndex, InvalidIndex }; |
| unsigned result = indexForRegister[reg]; |
| return result; |
| } |
| |
| static const char* debugName(GPRReg reg) |
| { |
| ASSERT(reg != InvalidGPRReg); |
| return MacroAssembler::gprName(reg); |
| } |
| |
| static constexpr unsigned InvalidIndex = 0xffffffff; |
| }; |
| |
| #endif // CPU(ARM) |
| |
| #if CPU(ARM64) |
| #define NUMBER_OF_ARGUMENT_REGISTERS 8u |
| // Callee Saves includes x19..x28 and FP registers q8..q15 |
| #define NUMBER_OF_CALLEE_SAVES_REGISTERS 18u |
| |
| class GPRInfo { |
| public: |
| typedef GPRReg RegisterType; |
| static constexpr unsigned numberOfRegisters = 16; |
| static constexpr unsigned numberOfArgumentRegisters = 8; |
| |
| // These registers match the baseline JIT. |
| static constexpr GPRReg callFrameRegister = ARM64Registers::fp; |
| static constexpr GPRReg numberTagRegister = ARM64Registers::x27; |
| static constexpr GPRReg notCellMaskRegister = ARM64Registers::x28; |
| static constexpr GPRReg dataTempRegister = MacroAssembler::dataTempRegister; |
| static constexpr GPRReg memoryTempRegister = MacroAssembler::memoryTempRegister; |
| // Temporary registers. |
| static constexpr GPRReg regT0 = ARM64Registers::x0; |
| static constexpr GPRReg regT1 = ARM64Registers::x1; |
| static constexpr GPRReg regT2 = ARM64Registers::x2; |
| static constexpr GPRReg regT3 = ARM64Registers::x3; |
| static constexpr GPRReg regT4 = ARM64Registers::x4; |
| static constexpr GPRReg regT5 = ARM64Registers::x5; |
| static constexpr GPRReg regT6 = ARM64Registers::x6; |
| static constexpr GPRReg regT7 = ARM64Registers::x7; |
| static constexpr GPRReg regT8 = ARM64Registers::x8; |
| static constexpr GPRReg regT9 = ARM64Registers::x9; |
| static constexpr GPRReg regT10 = ARM64Registers::x10; |
| static constexpr GPRReg regT11 = ARM64Registers::x11; |
| static constexpr GPRReg regT12 = ARM64Registers::x12; |
| static constexpr GPRReg regT13 = ARM64Registers::x13; |
| static constexpr GPRReg regT14 = ARM64Registers::x14; |
| static constexpr GPRReg regT15 = ARM64Registers::x15; |
| static constexpr GPRReg regCS0 = ARM64Registers::x19; // Used by FTL only |
| static constexpr GPRReg regCS1 = ARM64Registers::x20; // Used by FTL only |
| static constexpr GPRReg regCS2 = ARM64Registers::x21; // Used by FTL only |
| static constexpr GPRReg regCS3 = ARM64Registers::x22; // Used by FTL only |
| static constexpr GPRReg regCS4 = ARM64Registers::x23; // Used by FTL only |
| static constexpr GPRReg regCS5 = ARM64Registers::x24; // Used by FTL only |
| static constexpr GPRReg regCS6 = ARM64Registers::x25; |
| static constexpr GPRReg regCS7 = ARM64Registers::x26; |
| static constexpr GPRReg regCS8 = ARM64Registers::x27; // numberTag |
| static constexpr GPRReg regCS9 = ARM64Registers::x28; // notCellMask |
| // These constants provide the names for the general purpose argument & return value registers. |
| static constexpr GPRReg argumentGPR0 = ARM64Registers::x0; // regT0 |
| static constexpr GPRReg argumentGPR1 = ARM64Registers::x1; // regT1 |
| static constexpr GPRReg argumentGPR2 = ARM64Registers::x2; // regT2 |
| static constexpr GPRReg argumentGPR3 = ARM64Registers::x3; // regT3 |
| static constexpr GPRReg argumentGPR4 = ARM64Registers::x4; // regT4 |
| static constexpr GPRReg argumentGPR5 = ARM64Registers::x5; // regT5 |
| static constexpr GPRReg argumentGPR6 = ARM64Registers::x6; // regT6 |
| static constexpr GPRReg argumentGPR7 = ARM64Registers::x7; // regT7 |
| static constexpr GPRReg nonArgGPR0 = ARM64Registers::x8; // regT8 |
| static constexpr GPRReg returnValueGPR = ARM64Registers::x0; // regT0 |
| static constexpr GPRReg returnValueGPR2 = ARM64Registers::x1; // regT1 |
| static constexpr GPRReg nonPreservedNonReturnGPR = ARM64Registers::x2; |
| static constexpr GPRReg nonPreservedNonArgumentGPR0 = ARM64Registers::x8; |
| static constexpr GPRReg nonPreservedNonArgumentGPR1 = ARM64Registers::x9; |
| static constexpr GPRReg patchpointScratchRegister = ARM64Registers::ip0; |
| static constexpr GPRReg wasmScratchGPR0 = ARM64Registers::x9; |
| static constexpr GPRReg wasmScratchGPR1 = ARM64Registers::x10; |
| |
| // GPRReg mapping is direct, the machine register numbers can |
| // be used directly as indices into the GPR RegisterBank. |
| COMPILE_ASSERT(ARM64Registers::q0 == 0, q0_is_0); |
| COMPILE_ASSERT(ARM64Registers::q1 == 1, q1_is_1); |
| COMPILE_ASSERT(ARM64Registers::q2 == 2, q2_is_2); |
| COMPILE_ASSERT(ARM64Registers::q3 == 3, q3_is_3); |
| COMPILE_ASSERT(ARM64Registers::q4 == 4, q4_is_4); |
| COMPILE_ASSERT(ARM64Registers::q5 == 5, q5_is_5); |
| COMPILE_ASSERT(ARM64Registers::q6 == 6, q6_is_6); |
| COMPILE_ASSERT(ARM64Registers::q7 == 7, q7_is_7); |
| COMPILE_ASSERT(ARM64Registers::q8 == 8, q8_is_8); |
| COMPILE_ASSERT(ARM64Registers::q9 == 9, q9_is_9); |
| COMPILE_ASSERT(ARM64Registers::q10 == 10, q10_is_10); |
| COMPILE_ASSERT(ARM64Registers::q11 == 11, q11_is_11); |
| COMPILE_ASSERT(ARM64Registers::q12 == 12, q12_is_12); |
| COMPILE_ASSERT(ARM64Registers::q13 == 13, q13_is_13); |
| COMPILE_ASSERT(ARM64Registers::q14 == 14, q14_is_14); |
| COMPILE_ASSERT(ARM64Registers::q15 == 15, q15_is_15); |
| static GPRReg toRegister(unsigned index) |
| { |
| return (GPRReg)index; |
| } |
| static unsigned toIndex(GPRReg reg) |
| { |
| if (reg > regT15) |
| return InvalidIndex; |
| return (unsigned)reg; |
| } |
| |
| static GPRReg toArgumentRegister(unsigned index) |
| { |
| ASSERT(index < numberOfArgumentRegisters); |
| return toRegister(index); |
| } |
| |
| static const char* debugName(GPRReg reg) |
| { |
| ASSERT(reg != InvalidGPRReg); |
| return MacroAssembler::gprName(reg); |
| } |
| |
| static const std::array<GPRReg, 4>& reservedRegisters() |
| { |
| static const std::array<GPRReg, 4> reservedRegisters { { |
| dataTempRegister, |
| memoryTempRegister, |
| numberTagRegister, |
| notCellMaskRegister, |
| } }; |
| return reservedRegisters; |
| } |
| |
| static constexpr unsigned InvalidIndex = 0xffffffff; |
| }; |
| |
| #endif // CPU(ARM64) |
| |
| #if CPU(MIPS) |
| #define NUMBER_OF_ARGUMENT_REGISTERS 4u |
| #define NUMBER_OF_CALLEE_SAVES_REGISTERS 2u |
| |
| class GPRInfo { |
| public: |
| typedef GPRReg RegisterType; |
| static constexpr unsigned numberOfRegisters = 11; |
| static constexpr unsigned numberOfArgumentRegisters = NUMBER_OF_ARGUMENT_REGISTERS; |
| |
| // regT0 must be v0 for returning a 32-bit value. |
| // regT1 must be v1 for returning a pair of 32-bit value. |
| |
| // Temporary registers. |
| static constexpr GPRReg regT0 = MIPSRegisters::v0; |
| static constexpr GPRReg regT1 = MIPSRegisters::v1; |
| static constexpr GPRReg regT2 = MIPSRegisters::t2; |
| static constexpr GPRReg regT3 = MIPSRegisters::t3; |
| static constexpr GPRReg regT4 = MIPSRegisters::t4; |
| static constexpr GPRReg regT5 = MIPSRegisters::t5; |
| static constexpr GPRReg regT6 = MIPSRegisters::t6; |
| static constexpr GPRReg regT7 = MIPSRegisters::a0; |
| static constexpr GPRReg regT8 = MIPSRegisters::a1; |
| static constexpr GPRReg regT9 = MIPSRegisters::a2; |
| static constexpr GPRReg regT10 = MIPSRegisters::a3; |
| // These registers match the baseline JIT. |
| static constexpr GPRReg callFrameRegister = MIPSRegisters::fp; |
| // These constants provide the names for the general purpose argument & return value registers. |
| static constexpr GPRReg argumentGPR0 = MIPSRegisters::a0; |
| static constexpr GPRReg argumentGPR1 = MIPSRegisters::a1; |
| static constexpr GPRReg argumentGPR2 = MIPSRegisters::a2; |
| static constexpr GPRReg argumentGPR3 = MIPSRegisters::a3; |
| static constexpr GPRReg nonArgGPR0 = regT4; |
| static constexpr GPRReg returnValueGPR = regT0; |
| static constexpr GPRReg returnValueGPR2 = regT1; |
| static constexpr GPRReg nonPreservedNonReturnGPR = regT2; |
| static constexpr GPRReg regCS0 = MIPSRegisters::s0; |
| static constexpr GPRReg regCS1 = MIPSRegisters::s1; |
| |
| static GPRReg toRegister(unsigned index) |
| { |
| ASSERT(index < numberOfRegisters); |
| static const GPRReg registerForIndex[numberOfRegisters] = { regT0, regT1, regT2, regT3, regT4, regT5, regT6, regT7, regT8, regT9, regT10 }; |
| return registerForIndex[index]; |
| } |
| |
| static GPRReg toArgumentRegister(unsigned index) |
| { |
| ASSERT(index < numberOfArgumentRegisters); |
| static const GPRReg registerForIndex[numberOfArgumentRegisters] = { argumentGPR0, argumentGPR1, argumentGPR2, argumentGPR3 }; |
| return registerForIndex[index]; |
| } |
| |
| static unsigned toIndex(GPRReg reg) |
| { |
| ASSERT(reg != InvalidGPRReg); |
| ASSERT(reg < 32); |
| static const unsigned indexForRegister[32] = { |
| InvalidIndex, InvalidIndex, 0, 1, 7, 8, 9, 10, |
| InvalidIndex, InvalidIndex, 2, 3, 4, 5, 6, InvalidIndex, |
| InvalidIndex, InvalidIndex, InvalidIndex, InvalidIndex, InvalidIndex, InvalidIndex, InvalidIndex, InvalidIndex, |
| InvalidIndex, InvalidIndex, InvalidIndex, InvalidIndex, InvalidIndex, InvalidIndex, InvalidIndex, InvalidIndex |
| }; |
| unsigned result = indexForRegister[reg]; |
| return result; |
| } |
| |
| static const char* debugName(GPRReg reg) |
| { |
| ASSERT(reg != InvalidGPRReg); |
| return MacroAssembler::gprName(reg); |
| } |
| |
| static constexpr unsigned InvalidIndex = 0xffffffff; |
| }; |
| |
| #endif // CPU(MIPS) |
| |
| // The baseline JIT uses "accumulator" style execution with regT0 (for 64-bit) |
| // and regT0 + regT1 (for 32-bit) serving as the accumulator register(s) for |
| // passing results of one opcode to the next. Hence: |
| COMPILE_ASSERT(GPRInfo::regT0 == GPRInfo::returnValueGPR, regT0_must_equal_returnValueGPR); |
| #if USE(JSVALUE32_64) |
| COMPILE_ASSERT(GPRInfo::regT1 == GPRInfo::returnValueGPR2, regT1_must_equal_returnValueGPR2); |
| #endif |
| |
| inline GPRReg extractResult(GPRReg result) { return result; } |
| #if USE(JSVALUE64) |
| inline GPRReg extractResult(JSValueRegs result) { return result.gpr(); } |
| #else |
| inline JSValueRegs extractResult(JSValueRegs result) { return result; } |
| #endif |
| inline NoResultTag extractResult(NoResultTag) { return NoResult; } |
| |
| // We use this hack to get the GPRInfo from the GPRReg type in templates because our code is bad and we should feel bad.. |
| constexpr GPRInfo toInfoFromReg(GPRReg) { return GPRInfo(); } |
| |
| #endif // ENABLE(ASSEMBLER) |
| |
| } // namespace JSC |
| |
| namespace WTF { |
| |
| inline void printInternal(PrintStream& out, JSC::GPRReg reg) |
| { |
| #if ENABLE(ASSEMBLER) |
| out.print("%", JSC::GPRInfo::debugName(reg)); |
| #else |
| out.printf("%%r%d", reg); |
| #endif |
| } |
| |
| } // namespace WTF |
