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-rw-r--r--src/common/x64/xbyak_abi.h178
1 files changed, 178 insertions, 0 deletions
diff --git a/src/common/x64/xbyak_abi.h b/src/common/x64/xbyak_abi.h
new file mode 100644
index 000000000..6090d93e1
--- /dev/null
+++ b/src/common/x64/xbyak_abi.h
@@ -0,0 +1,178 @@
+// Copyright 2016 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <initializer_list>
+#include <xbyak.h>
+#include "common/assert.h"
+#include "common/bit_set.h"
+
+namespace Common {
+namespace X64 {
+
+int RegToIndex(const Xbyak::Reg& reg) {
+ using Kind = Xbyak::Reg::Kind;
+ ASSERT_MSG((reg.getKind() & (Kind::REG | Kind::XMM)) != 0,
+ "RegSet only support GPRs and XMM registers.");
+ ASSERT_MSG(reg.getIdx() < 16, "RegSet only supports XXM0-15.");
+ return reg.getIdx() + (reg.getKind() == Kind::REG ? 0 : 16);
+}
+
+inline Xbyak::Reg64 IndexToReg64(int reg_index) {
+ ASSERT(reg_index < 16);
+ return Xbyak::Reg64(reg_index);
+}
+
+inline Xbyak::Xmm IndexToXmm(int reg_index) {
+ ASSERT(reg_index >= 16 && reg_index < 32);
+ return Xbyak::Xmm(reg_index - 16);
+}
+
+inline Xbyak::Reg IndexToReg(int reg_index) {
+ if (reg_index < 16) {
+ return IndexToReg64(reg_index);
+ } else {
+ return IndexToXmm(reg_index);
+ }
+}
+
+inline BitSet32 BuildRegSet(std::initializer_list<Xbyak::Reg> regs) {
+ BitSet32 bits;
+ for (const Xbyak::Reg& reg : regs) {
+ bits[RegToIndex(reg)] = true;
+ }
+ return bits;
+}
+
+const BitSet32 ABI_ALL_GPRS(0x0000FFFF);
+const BitSet32 ABI_ALL_XMMS(0xFFFF0000);
+
+#ifdef _WIN32
+
+// Microsoft x64 ABI
+const Xbyak::Reg ABI_RETURN = Xbyak::util::rax;
+const Xbyak::Reg ABI_PARAM1 = Xbyak::util::rcx;
+const Xbyak::Reg ABI_PARAM2 = Xbyak::util::rdx;
+const Xbyak::Reg ABI_PARAM3 = Xbyak::util::r8;
+const Xbyak::Reg ABI_PARAM4 = Xbyak::util::r9;
+
+const BitSet32 ABI_ALL_CALLER_SAVED = BuildRegSet({
+ // GPRs
+ Xbyak::util::rcx, Xbyak::util::rdx, Xbyak::util::r8, Xbyak::util::r9, Xbyak::util::r10,
+ Xbyak::util::r11,
+ // XMMs
+ Xbyak::util::xmm0, Xbyak::util::xmm1, Xbyak::util::xmm2, Xbyak::util::xmm3, Xbyak::util::xmm4,
+ Xbyak::util::xmm5,
+});
+
+const BitSet32 ABI_ALL_CALLEE_SAVED = BuildRegSet({
+ // GPRs
+ Xbyak::util::rbx, Xbyak::util::rsi, Xbyak::util::rdi, Xbyak::util::rbp, Xbyak::util::r12,
+ Xbyak::util::r13, Xbyak::util::r14, Xbyak::util::r15,
+ // XMMs
+ Xbyak::util::xmm6, Xbyak::util::xmm7, Xbyak::util::xmm8, Xbyak::util::xmm9, Xbyak::util::xmm10,
+ Xbyak::util::xmm11, Xbyak::util::xmm12, Xbyak::util::xmm13, Xbyak::util::xmm14,
+ Xbyak::util::xmm15,
+});
+
+constexpr size_t ABI_SHADOW_SPACE = 0x20;
+
+#else
+
+// System V x86-64 ABI
+const Xbyak::Reg ABI_RETURN = Xbyak::util::rax;
+const Xbyak::Reg ABI_PARAM1 = Xbyak::util::rdi;
+const Xbyak::Reg ABI_PARAM2 = Xbyak::util::rsi;
+const Xbyak::Reg ABI_PARAM3 = Xbyak::util::rdx;
+const Xbyak::Reg ABI_PARAM4 = Xbyak::util::rcx;
+
+const BitSet32 ABI_ALL_CALLER_SAVED = BuildRegSet({
+ // GPRs
+ Xbyak::util::rcx, Xbyak::util::rdx, Xbyak::util::rdi, Xbyak::util::rsi, Xbyak::util::r8,
+ Xbyak::util::r9, Xbyak::util::r10, Xbyak::util::r11,
+ // XMMs
+ Xbyak::util::xmm0, Xbyak::util::xmm1, Xbyak::util::xmm2, Xbyak::util::xmm3, Xbyak::util::xmm4,
+ Xbyak::util::xmm5, Xbyak::util::xmm6, Xbyak::util::xmm7, Xbyak::util::xmm8, Xbyak::util::xmm9,
+ Xbyak::util::xmm10, Xbyak::util::xmm11, Xbyak::util::xmm12, Xbyak::util::xmm13,
+ Xbyak::util::xmm14, Xbyak::util::xmm15,
+});
+
+const BitSet32 ABI_ALL_CALLEE_SAVED = BuildRegSet({
+ // GPRs
+ Xbyak::util::rbx, Xbyak::util::rbp, Xbyak::util::r12, Xbyak::util::r13, Xbyak::util::r14,
+ Xbyak::util::r15,
+});
+
+constexpr size_t ABI_SHADOW_SPACE = 0;
+
+#endif
+
+void ABI_CalculateFrameSize(BitSet32 regs, size_t rsp_alignment, size_t needed_frame_size,
+ s32* out_subtraction, s32* out_xmm_offset) {
+ int count = (regs & ABI_ALL_GPRS).Count();
+ rsp_alignment -= count * 8;
+ size_t subtraction = 0;
+ int xmm_count = (regs & ABI_ALL_XMMS).Count();
+ if (xmm_count) {
+ // If we have any XMMs to save, we must align the stack here.
+ subtraction = rsp_alignment & 0xF;
+ }
+ subtraction += 0x10 * xmm_count;
+ size_t xmm_base_subtraction = subtraction;
+ subtraction += needed_frame_size;
+ subtraction += ABI_SHADOW_SPACE;
+ // Final alignment.
+ rsp_alignment -= subtraction;
+ subtraction += rsp_alignment & 0xF;
+
+ *out_subtraction = (s32)subtraction;
+ *out_xmm_offset = (s32)(subtraction - xmm_base_subtraction);
+}
+
+size_t ABI_PushRegistersAndAdjustStack(Xbyak::CodeGenerator& code, BitSet32 regs,
+ size_t rsp_alignment, size_t needed_frame_size = 0) {
+ s32 subtraction, xmm_offset;
+ ABI_CalculateFrameSize(regs, rsp_alignment, needed_frame_size, &subtraction, &xmm_offset);
+
+ for (int reg_index : (regs & ABI_ALL_GPRS)) {
+ code.push(IndexToReg64(reg_index));
+ }
+
+ if (subtraction != 0) {
+ code.sub(code.rsp, subtraction);
+ }
+
+ for (int reg_index : (regs & ABI_ALL_XMMS)) {
+ code.movaps(code.xword[code.rsp + xmm_offset], IndexToXmm(reg_index));
+ xmm_offset += 0x10;
+ }
+
+ return ABI_SHADOW_SPACE;
+}
+
+void ABI_PopRegistersAndAdjustStack(Xbyak::CodeGenerator& code, BitSet32 regs, size_t rsp_alignment,
+ size_t needed_frame_size = 0) {
+ s32 subtraction, xmm_offset;
+ ABI_CalculateFrameSize(regs, rsp_alignment, needed_frame_size, &subtraction, &xmm_offset);
+
+ for (int reg_index : (regs & ABI_ALL_XMMS)) {
+ code.movaps(IndexToXmm(reg_index), code.xword[code.rsp + xmm_offset]);
+ xmm_offset += 0x10;
+ }
+
+ if (subtraction != 0) {
+ code.add(code.rsp, subtraction);
+ }
+
+ // GPRs need to be popped in reverse order
+ for (int reg_index = 15; reg_index >= 0; reg_index--) {
+ if (regs[reg_index]) {
+ code.pop(IndexToReg64(reg_index));
+ }
+ }
+}
+
+} // namespace X64
+} // namespace Common
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