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Fixed bug 1434 - Add AltiVec detection for OpenBSD/powerpc

Brad Smith 2012-02-29 19:31:46 PST

The attached patch adds AltiVec detection for OpenBSD/powerpc. Please apply the
patch to both 2.0 and 1.2.
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slouken committed Jul 18, 2012
1 parent e3bb428 commit 1d365aabda5be313283658da39f9cc3f7223de4e
Showing with 11 additions and 3 deletions.
  1. +11 −3 src/cpuinfo/SDL_cpuinfo.c
@@ -28,6 +28,10 @@

#if defined(__MACOSX__) && (defined(__ppc__) || defined(__ppc64__))
#include <sys/sysctl.h> /* For AltiVec check */
#elif defined(__OpenBSD__) && defined(__powerpc__)
#include <sys/param.h>
#include <sys/sysctl.h> /* For AltiVec check */
#include <machine/cpu.h>
#elif SDL_ALTIVEC_BLITTERS && HAVE_SETJMP
#include <signal.h>
#include <setjmp.h>
@@ -42,7 +46,7 @@
#define CPU_HAS_SSE2 0x00000080
#define CPU_HAS_ALTIVEC 0x00000100

#if SDL_ALTIVEC_BLITTERS && HAVE_SETJMP && !__MACOSX__
#if SDL_ALTIVEC_BLITTERS && HAVE_SETJMP && !__MACOSX__ && !__OpenBSD__
/* This is the brute force way of detecting instruction sets...
the idea is borrowed from the libmpeg2 library - thanks!
*/
@@ -359,8 +363,12 @@ static __inline__ int CPU_haveSSE2(void)
static __inline__ int CPU_haveAltiVec(void)
{
volatile int altivec = 0;
#if defined(__MACOSX__) && (defined(__ppc__) || defined(__ppc64__))
int selectors[2] = { CTL_HW, HW_VECTORUNIT };
#if (defined(__MACOSX__) && (defined(__ppc__) || defined(__ppc64__))) || (defined(__OpenBSD__) && defined(__powerpc__))
# ifdef __OpenBSD__
int selectors[2] = { CTL_MACHDEP, CPU_ALTIVEC };
# else
int selectors[2] = { CTL_HW, HW_VECTORUNIT };
# endif
int hasVectorUnit = 0;
size_t length = sizeof(hasVectorUnit);
int error = sysctl(selectors, 2, &hasVectorUnit, &length, NULL, 0);

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