Enlightenment CVS committal
Author : rbdpngn
Project : e17
Module : libs/evas
Dir : e17/libs/evas/src/lib/engines/common
Modified Files:
evas_cpu.c
Log Message:
Generic runtime cpu feature testing. This is not used much yet, and shouldn't
break anything. Please review and shout if you see problems.
===================================================================
RCS file: /cvsroot/enlightenment/e17/libs/evas/src/lib/engines/common/evas_cpu.c,v
retrieving revision 1.2
retrieving revision 1.3
diff -u -3 -r1.2 -r1.3
--- evas_cpu.c 14 Nov 2002 05:38:10 -0000 1.2
+++ evas_cpu.c 11 Mar 2003 04:39:58 -0000 1.3
@@ -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
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