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Fixed 8-bit XCHG instruction on the 64-bit old recompiler when both source and destination are a high 8-bit register (AH, CH, BH, or DH), fixes the longstanding Chicago 58s bug.

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OBattler
2020-12-12 15:59:10 +01:00
parent 09bc3d6cd0
commit a55b9c6512
2 changed files with 18 additions and 29 deletions
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4
src/codegen/codegen_ops_xchg.h
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@@ -44,9 +44,6 @@ OP_XCHG_EAX_(EBP)
static uint32_t ropXCHG_b(uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc, codeblock_t *block)
{
/* #ifdef __amd64__
return 0;
#else */
int src_reg, dst_reg, temp_reg;
if ((fetchdat & 0xc0) != 0xc0)
@@ -59,7 +56,6 @@ static uint32_t ropXCHG_b(uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uin
STORE_REG_TARGET_B_RELEASE(temp_reg, fetchdat & 7);
return op_pc + 1;
/* #endif */
}
static uint32_t ropXCHG_w(uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc, codeblock_t *block)
{