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Generic runtime cpu feature testing. This is not used much yet, and shouldn't 

break anything. Please review and shout if you see problems.


SVN revision: 6761
This commit is contained in:
rbdpngn 2003-03-11 04:39:58 +00:00 committed by rbdpngn
parent 0ec43a7627
commit b6ae92d827
2 changed files with 104 additions and 0 deletions
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92
legacy/evas/src/lib/engines/common/evas_cpu.c
View File

@ -4,9 +4,101 @@
#include "evas_mmx.h"
#endif
static jmp_buf detect_buf;
static int cpu_feature_mask = 0;
void
evas_common_cpu_catch_ill(void)
{
longjmp(detect_buf, 1);
}
#ifdef __i386__
void
evas_common_cpu_mmx_test(void)
{
pxor_r2r(mm4, mm4);
evas_common_cpu_end_opt();
}
void
evas_common_cpu_sse_test(void)
{
}
#endif /* __i386__ */
#ifdef __POWERPC__
#ifdef __VEC__
void
evas_common_cpu_altivec_test(void)
{
vector unsigned int zero;
zero = vec_splat_u32(0);
}
#endif /* __VEC__ */
#endif /* __POWERPC__ */
#ifdef __SPARC__
void
evas_common_cpu_vis_test(void)
{
}
#endif /* __SPARC__ */
int
evas_common_cpu_feature_test(void (*feature)(void))
{
int enabled = 1;
struct sigaction act, oact;
sigaction(SIGILL, &act, &oact);
if (setjmp(detect_buf))
enabled = 0;
else
feature();
sigaction(SIGILL, &oact, NULL);
return enabled;
}
void
evas_common_cpu_init(void)
{
int enabled;
#ifdef __i386__
if (evas_common_cpu_feature_test(evas_common_cpu_mmx_test))
cpu_feature_mask |= CPU_FEATURE_MMX;
if (evas_common_cpu_feature_test(evas_common_cpu_sse_test))
cpu_feature_mask |= CPU_FEATURE_SSE;
#endif /* __i386__ */
#ifdef __POWERPC__
#ifdef __VEC__
if (evas_common_cpu_feature_test(evas_common_cpu_altivec_test))
cpu_feature_mask |= CPU_FEATURE_ALTIVEC;
#endif /* __VEC__ */
#endif /* __POWERPC__ */
#ifdef __SPARC__
if (evas_common_cpu_feature_test(evas_common_cpu_vis_test))
cpu_feature_mask |= CPU_FEATURE_VIS;
#endif /* __SPARC__ */
printf("Cpu mask set to %08x\n", cpu_feature_mask);
}
inline int
evas_common_cpu_has_feature(unsigned int feature)
{
return (cpu_feature_mask & feature);
}
int

12
legacy/evas/src/lib/include/evas_common.h
View File

@ -110,6 +110,8 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <setjmp.h>
#ifdef _WIN32_WCE
#include <windows.h>
@ -193,6 +195,16 @@ typedef enum _Convert_Pal_Mode
PAL_MODE_LAST
} Convert_Pal_Mode;
typedef enum _CPU_Features
{
CPU_FEATURE_C = 0,
CPU_FEATURE_MMX = (1 << 0),
CPU_FEATURE_SSE = (1 << 1),
CPU_FEATURE_ALTIVEC = (1 << 2),
CPU_FEATURE_VIS = (1 << 3),
CPU_FEATURE_VIS2 = (1 << 4)
} CPU_Features;
/*****************************************************************************/
struct _Evas_Object_List