diff options
Diffstat (limited to 'src/common/x64')
-rw-r--r-- | src/common/x64/emitter.cpp | 28 | ||||
-rw-r--r-- | src/common/x64/emitter.h | 4 |
2 files changed, 32 insertions, 0 deletions
diff --git a/src/common/x64/emitter.cpp b/src/common/x64/emitter.cpp index 1dcf2416c..5662f7f86 100644 --- a/src/common/x64/emitter.cpp +++ b/src/common/x64/emitter.cpp @@ -455,6 +455,18 @@ void XEmitter::CALL(const void* fnptr) Write32(u32(distance)); } +FixupBranch XEmitter::CALL() +{ + FixupBranch branch; + branch.type = 1; + branch.ptr = code + 5; + + Write8(0xE8); + Write32(0); + + return branch; +} + FixupBranch XEmitter::J(bool force5bytes) { FixupBranch branch; @@ -531,6 +543,22 @@ void XEmitter::SetJumpTarget(const FixupBranch& branch) } } +void XEmitter::SetJumpTarget(const FixupBranch& branch, const u8* target) +{ + if (branch.type == 0) + { + s64 distance = (s64)(target - branch.ptr); + ASSERT_MSG(distance >= -0x80 && distance < 0x80, "Jump target too far away, needs force5Bytes = true"); + branch.ptr[-1] = (u8)(s8)distance; + } + else if (branch.type == 1) + { + s64 distance = (s64)(target - branch.ptr); + ASSERT_MSG(distance >= -0x80000000LL && distance < 0x80000000LL, "Jump target too far away, needs indirect register"); + ((s32*)branch.ptr)[-1] = (s32)distance; + } +} + //Single byte opcodes //There is no PUSHAD/POPAD in 64-bit mode. void XEmitter::INT3() {Write8(0xCC);} diff --git a/src/common/x64/emitter.h b/src/common/x64/emitter.h index 7c6548fb5..60a77dfe1 100644 --- a/src/common/x64/emitter.h +++ b/src/common/x64/emitter.h @@ -17,6 +17,8 @@ #pragma once +#include <cstddef> + #include "common/assert.h" #include "common/bit_set.h" #include "common/common_types.h" @@ -425,12 +427,14 @@ public: #undef CALL #endif void CALL(const void* fnptr); + FixupBranch CALL(); void CALLptr(OpArg arg); FixupBranch J_CC(CCFlags conditionCode, bool force5bytes = false); void J_CC(CCFlags conditionCode, const u8* addr, bool force5Bytes = false); void SetJumpTarget(const FixupBranch& branch); + void SetJumpTarget(const FixupBranch& branch, const u8* target); void SETcc(CCFlags flag, OpArg dest); // Note: CMOV brings small if any benefit on current cpus. |