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x86-64 asm: Remove useless jmp opcode 

Also remove the hacky mod/rm byte emission during
disp/imm writing.
master
Michael Matz 2016-05-11 18:56:19 +02:00
parent bd93dc6923
commit 613962e353
3 changed files with 1 additions and 8 deletions
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7
i386-asm.c
View File

@ -1041,13 +1041,6 @@ ST_FUNC void asm_opcode(TCCState *s1, int opcode)
/* jmp $r */
g(0xE0 + ops[i].reg);
}
#endif
#ifdef TCC_TARGET_X86_64
} else if (v & (OP_REG32 | OP_REG64)) {
if (pa->instr_type & (OPC_JMP | OPC_SHORTJMP)) {
/* jmp $r */
g(0xE0 + ops[i].reg);
}
#endif
}
}

1
tests/asmtest.S
View File

@ -236,6 +236,7 @@ lcall *(%rax)
#endif
jmp 0x1000
jmp *(%edi)
#ifdef __i386__
jmp *%eax
#else

1
x86_64-asm.h
View File

@ -200,7 +200,6 @@ ALT(DEF_ASM_OP2(shrdw, 0x0fad, 0, OPC_MODRM | OPC_WLQ, OPT_REGW, OPT_EA | OPT_RE
ALT(DEF_ASM_OP1(call, 0xff, 2, OPC_MODRM, OPT_INDIR))
ALT(DEF_ASM_OP1(call, 0xe8, 0, OPC_JMP, OPT_ADDR))
ALT(DEF_ASM_OP1(jmp, 0xff, 4, OPC_MODRM, OPT_INDIR))
ALT(DEF_ASM_OP1(jmp, 0xff, 0, OPC_JMP | OPC_WL, OPT_REGW))
ALT(DEF_ASM_OP1(jmp, 0xeb, 0, OPC_SHORTJMP | OPC_JMP, OPT_ADDR))
ALT(DEF_ASM_OP1(lcall, 0xff, 3, OPC_MODRM, OPT_EA))