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tcg/i386: Fix build for systems without working cpuid.h (MacOSX, Win32)

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Win32 doesn't have a cpuid.h, and MacOSX may have one but without
the __cpuid() function we use, which means that commit 9d2eec20
broke the build for those platforms. Fix this by tightening up
our configure cpuid.h check to test that the functions we need
are present, and adding some missing #ifdef guards in
tcg/i386/tcg-target.c.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Peter Maydell 2014-02-20 19:42:53 +00:00
parent 2ca92bb993
commit 774d566cdb
2 changed files with 15 additions and 2 deletions
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13
configure vendored
View file

@ -3564,7 +3564,18 @@ cpuid_h=no
cat > $TMPC << EOF
#include <cpuid.h>
int main(void) {
return 0;
unsigned a, b, c, d;
int max = __get_cpuid_max(0, 0);
if (max >= 1) {
__cpuid(1, a, b, c, d);
}
if (max >= 7) {
__cpuid_count(7, 0, a, b, c, d);
}
return 0;
}
EOF
if compile_prog "" "" ; then

4
tcg/i386/tcg-target.c
View file

@ -115,7 +115,7 @@ static const int tcg_target_call_oarg_regs[] = {
is available. */
#if TCG_TARGET_REG_BITS == 64
# define have_cmov 1
#elif defined(CONFIG_CPUID_H)
#elif defined(CONFIG_CPUID_H) && defined(bit_CMOV)
static bool have_cmov;
#else
# define have_cmov 0
@ -2295,6 +2295,7 @@ static void tcg_target_qemu_prologue(TCGContext *s)
static void tcg_target_init(TCGContext *s)
{
#ifdef CONFIG_CPUID_H
unsigned a, b, c, d;
int max = __get_cpuid_max(0, 0);
@ -2323,6 +2324,7 @@ static void tcg_target_init(TCGContext *s)
have_bmi2 = (b & bit_BMI2) != 0;
#endif
}
#endif
if (TCG_TARGET_REG_BITS == 64) {
tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I32], 0, 0xffff);