forked from dolphin-emu/dolphin
235 lines
6.0 KiB
C++
235 lines
6.0 KiB
C++
// Copyright 2008 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#include "Common/CommonTypes.h"
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#include "Common/x64ABI.h"
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#include "Common/x64Emitter.h"
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using namespace Gen;
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// Shared code between Win64 and Unix64
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void XEmitter::ABI_CalculateFrameSize(BitSet32 mask, size_t rsp_alignment, size_t needed_frame_size, size_t* shadowp, size_t* subtractionp, size_t* xmm_offsetp)
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{
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size_t shadow = 0;
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#if defined(_WIN32)
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shadow = 0x20;
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#endif
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int count = (mask & ABI_ALL_GPRS).Count();
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rsp_alignment -= count * 8;
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size_t subtraction = 0;
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int fpr_count = (mask & ABI_ALL_FPRS).Count();
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if (fpr_count)
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{
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// If we have any XMMs to save, we must align the stack here.
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subtraction = rsp_alignment & 0xf;
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}
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subtraction += 16 * fpr_count;
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size_t xmm_base_subtraction = subtraction;
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subtraction += needed_frame_size;
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subtraction += shadow;
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// Final alignment.
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rsp_alignment -= subtraction;
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subtraction += rsp_alignment & 0xf;
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*shadowp = shadow;
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*subtractionp = subtraction;
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*xmm_offsetp = subtraction - xmm_base_subtraction;
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}
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size_t XEmitter::ABI_PushRegistersAndAdjustStack(BitSet32 mask, size_t rsp_alignment, size_t needed_frame_size)
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{
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size_t shadow, subtraction, xmm_offset;
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ABI_CalculateFrameSize(mask, rsp_alignment, needed_frame_size, &shadow, &subtraction, &xmm_offset);
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for (int r : mask & ABI_ALL_GPRS)
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PUSH((X64Reg)r);
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if (subtraction)
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SUB(64, R(RSP), subtraction >= 0x80 ? Imm32((u32)subtraction) : Imm8((u8)subtraction));
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for (int x : mask & ABI_ALL_FPRS)
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{
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MOVAPD(MDisp(RSP, (int)xmm_offset), (X64Reg)(x - 16));
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xmm_offset += 16;
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}
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return shadow;
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}
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void XEmitter::ABI_PopRegistersAndAdjustStack(BitSet32 mask, size_t rsp_alignment, size_t needed_frame_size)
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{
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size_t shadow, subtraction, xmm_offset;
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ABI_CalculateFrameSize(mask, rsp_alignment, needed_frame_size, &shadow, &subtraction, &xmm_offset);
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for (int x : mask & ABI_ALL_FPRS)
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{
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MOVAPD((X64Reg) (x - 16), MDisp(RSP, (int)xmm_offset));
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xmm_offset += 16;
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}
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if (subtraction)
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ADD(64, R(RSP), subtraction >= 0x80 ? Imm32((u32)subtraction) : Imm8((u8)subtraction));
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for (int r = 15; r >= 0; r--)
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{
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if (mask[r])
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POP((X64Reg)r);
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}
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}
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// Common functions
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void XEmitter::ABI_CallFunction(const void *func)
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{
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u64 distance = u64(func) - (u64(code) + 5);
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if (distance >= 0x0000000080000000ULL &&
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distance < 0xFFFFFFFF80000000ULL)
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{
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// Far call
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MOV(64, R(RAX), Imm64((u64)func));
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CALLptr(R(RAX));
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}
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else
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{
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CALL(func);
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}
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}
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void XEmitter::ABI_CallFunctionC16(const void *func, u16 param1)
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{
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MOV(32, R(ABI_PARAM1), Imm32((u32)param1));
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ABI_CallFunction(func);
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}
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void XEmitter::ABI_CallFunctionCC16(const void *func, u32 param1, u16 param2)
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{
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MOV(32, R(ABI_PARAM1), Imm32(param1));
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MOV(32, R(ABI_PARAM2), Imm32((u32)param2));
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ABI_CallFunction(func);
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}
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void XEmitter::ABI_CallFunctionC(const void *func, u32 param1)
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{
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MOV(32, R(ABI_PARAM1), Imm32(param1));
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ABI_CallFunction(func);
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}
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void XEmitter::ABI_CallFunctionCC(const void *func, u32 param1, u32 param2)
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{
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MOV(32, R(ABI_PARAM1), Imm32(param1));
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MOV(32, R(ABI_PARAM2), Imm32(param2));
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ABI_CallFunction(func);
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}
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void XEmitter::ABI_CallFunctionCP(const void *func, u32 param1, void *param2)
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{
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MOV(32, R(ABI_PARAM1), Imm32(param1));
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MOV(64, R(ABI_PARAM2), Imm64((u64)param2));
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ABI_CallFunction(func);
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}
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void XEmitter::ABI_CallFunctionCCC(const void *func, u32 param1, u32 param2, u32 param3)
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{
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MOV(32, R(ABI_PARAM1), Imm32(param1));
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MOV(32, R(ABI_PARAM2), Imm32(param2));
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MOV(32, R(ABI_PARAM3), Imm32(param3));
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ABI_CallFunction(func);
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}
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void XEmitter::ABI_CallFunctionCCP(const void *func, u32 param1, u32 param2, void *param3)
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{
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MOV(32, R(ABI_PARAM1), Imm32(param1));
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MOV(32, R(ABI_PARAM2), Imm32(param2));
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MOV(64, R(ABI_PARAM3), Imm64((u64)param3));
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ABI_CallFunction(func);
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}
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void XEmitter::ABI_CallFunctionCCCP(const void *func, u32 param1, u32 param2, u32 param3, void *param4)
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{
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MOV(32, R(ABI_PARAM1), Imm32(param1));
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MOV(32, R(ABI_PARAM2), Imm32(param2));
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MOV(32, R(ABI_PARAM3), Imm32(param3));
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MOV(64, R(ABI_PARAM4), Imm64((u64)param4));
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ABI_CallFunction(func);
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}
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void XEmitter::ABI_CallFunctionPC(const void *func, void *param1, u32 param2)
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{
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MOV(64, R(ABI_PARAM1), Imm64((u64)param1));
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MOV(32, R(ABI_PARAM2), Imm32(param2));
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ABI_CallFunction(func);
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}
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void XEmitter::ABI_CallFunctionPPC(const void *func, void *param1, void *param2, u32 param3)
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{
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MOV(64, R(ABI_PARAM1), Imm64((u64)param1));
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MOV(64, R(ABI_PARAM2), Imm64((u64)param2));
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MOV(32, R(ABI_PARAM3), Imm32(param3));
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ABI_CallFunction(func);
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}
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// Pass a register as a parameter.
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void XEmitter::ABI_CallFunctionR(const void *func, X64Reg reg1)
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{
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if (reg1 != ABI_PARAM1)
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MOV(32, R(ABI_PARAM1), R(reg1));
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ABI_CallFunction(func);
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}
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// Pass two registers as parameters.
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void XEmitter::ABI_CallFunctionRR(const void *func, X64Reg reg1, X64Reg reg2)
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{
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MOVTwo(64, ABI_PARAM1, reg1, 0, ABI_PARAM2, reg2);
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ABI_CallFunction(func);
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}
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void XEmitter::MOVTwo(int bits, Gen::X64Reg dst1, Gen::X64Reg src1, s32 offset1, Gen::X64Reg dst2, Gen::X64Reg src2)
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{
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if (dst1 == src2 && dst2 == src1)
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{
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XCHG(bits, R(src1), R(src2));
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if (offset1)
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ADD(bits, R(dst1), Imm32(offset1));
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}
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else if (src2 != dst1)
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{
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if (dst1 != src1 && offset1)
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LEA(bits, dst1, MDisp(src1, offset1));
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else if (dst1 != src1)
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MOV(bits, R(dst1), R(src1));
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else if (offset1)
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ADD(bits, R(dst1), Imm32(offset1));
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if (dst2 != src2)
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MOV(bits, R(dst2), R(src2));
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}
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else
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{
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if (dst2 != src2)
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MOV(bits, R(dst2), R(src2));
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if (dst1 != src1 && offset1)
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LEA(bits, dst1, MDisp(src1, offset1));
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else if (dst1 != src1)
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MOV(bits, R(dst1), R(src1));
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else if (offset1)
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ADD(bits, R(dst1), Imm32(offset1));
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}
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}
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void XEmitter::ABI_CallFunctionAC(int bits, const void *func, const Gen::OpArg &arg1, u32 param2)
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{
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if (!arg1.IsSimpleReg(ABI_PARAM1))
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MOV(bits, R(ABI_PARAM1), arg1);
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MOV(32, R(ABI_PARAM2), Imm32(param2));
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ABI_CallFunction(func);
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}
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void XEmitter::ABI_CallFunctionA(int bits, const void *func, const Gen::OpArg &arg1)
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{
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if (!arg1.IsSimpleReg(ABI_PARAM1))
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MOV(bits, R(ABI_PARAM1), arg1);
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ABI_CallFunction(func);
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}
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