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Fix fast-jit codegen lower_select issue (#1082)

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Directly patch the offset in condition jmp instructions as
the offset generated by asmjit is always 0.
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Wenyong Huang 2022-04-12 10:23:54 +08:00 committed by GitHub
parent d4fe9fcbdc
commit aeeaf4b02e
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1 changed files with 5 additions and 6 deletions
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11
core/iwasm/fast-jit/cg/x86-64/jit_codegen_x86_64.cpp
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@ -3545,12 +3545,9 @@ static bool
cmp_r_and_jmp_relative(x86::Assembler &a, int32 reg_no, COND_OP op, cmp_r_and_jmp_relative(x86::Assembler &a, int32 reg_no, COND_OP op,
int32 offset) int32 offset)
{ {
Imm target; Imm target(INT32_MAX);
char *stream = (char *)a.code()->sectionById(0)->buffer().data()
if (offset >= -127 && offset <= 127) + a.code()->sectionById(0)->buffer().size();
target.setValue((int8)offset);
else
target.setValue(offset);
switch (op) { switch (op) {
case EQ: case EQ:
@ -3588,6 +3585,8 @@ cmp_r_and_jmp_relative(x86::Assembler &a, int32 reg_no, COND_OP op,
break; break;
} }
/* The offset written by asmjit is always 0, we patch it again */
*(int32 *)(stream + 2) = offset;
return true; return true;
} }