mirror of
https://github.com/libretro/dolphin
synced 2024-11-04 20:43:51 -05:00
120 lines
3.2 KiB
C++
120 lines
3.2 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/x64ABI.h"
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#include "Common/CommonTypes.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,
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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,
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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,
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&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,
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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,
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&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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void XEmitter::MOVTwo(int bits, Gen::X64Reg dst1, Gen::X64Reg src1, s32 offset1, Gen::X64Reg dst2,
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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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