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emitter: Support arbitrary FixupBranch targets.
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@ -531,6 +531,22 @@ void XEmitter::SetJumpTarget(const FixupBranch& branch)
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}
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}
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void XEmitter::SetJumpTarget(const FixupBranch& branch, const u8* target)
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{
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if (branch.type == 0)
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{
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s64 distance = (s64)(target - branch.ptr);
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ASSERT_MSG(distance >= -0x80 && distance < 0x80, "Jump target too far away, needs force5Bytes = true");
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branch.ptr[-1] = (u8)(s8)distance;
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}
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else if (branch.type == 1)
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{
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s64 distance = (s64)(target - branch.ptr);
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ASSERT_MSG(distance >= -0x80000000LL && distance < 0x80000000LL, "Jump target too far away, needs indirect register");
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((s32*)branch.ptr)[-1] = (s32)distance;
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}
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}
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//Single byte opcodes
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//There is no PUSHAD/POPAD in 64-bit mode.
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void XEmitter::INT3() {Write8(0xCC);}
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@ -431,6 +431,7 @@ public:
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void J_CC(CCFlags conditionCode, const u8* addr, bool force5Bytes = false);
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void SetJumpTarget(const FixupBranch& branch);
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void SetJumpTarget(const FixupBranch& branch, const u8* target);
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void SETcc(CCFlags flag, OpArg dest);
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// Note: CMOV brings small if any benefit on current cpus.
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