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x86_64: Add -mno-sse option

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This disables generation of any SSE instructions (in particular
in stdarg function prologues).  Necessary for kernel compiles.
This commit is contained in:
Michael Matz
2016-10-03 05:20:21 +02:00
parent b5669a952b
commit ad723a419f
3 changed files with 29 additions and 4 deletions
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15
libtcc.c
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@ -1303,6 +1303,16 @@ static int tcc_set_flag(TCCState *s, const char *flag_name, int value)
flag_name, value);
}
static const FlagDef m_defs[] = {
#ifdef TCC_TARGET_X86_64
{ offsetof(TCCState, nosse), FD_INVERT, "sse" },
#endif
{ 0, 0, " no flag" },
};
static int tcc_set_m_flag(TCCState *s, const char *flag_name, int value)
{
return set_flag(s, m_defs, countof(m_defs), flag_name, value);
}
static int strstart(const char *val, const char **str)
{
@ -1778,9 +1788,10 @@ reparse:
s->soname = tcc_strdup(optarg);
break;
case TCC_OPTION_m:
if (strcmp(optarg, "32") && strcmp(optarg, "64"))
if (!strcmp(optarg, "32") || !strcmp(optarg, "64"))
s->option_m = tcc_strdup(optarg);
else if (tcc_set_m_flag(s, optarg, 1) < 0)
goto unsupported_option;
s->option_m = tcc_strdup(optarg);
break;
case TCC_OPTION_o:
if (s->outfile) {