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Fix AltiVec detection on FreeBSD

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The previous code was not correct, because there's no PPC_FEATURE_HAS_ALTIVEC MIB.
Instead, elf vector check should be done.
This commit is contained in:
pkubaj 2021-09-21 16:23:48 +00:00 committed by Sam Lantinga
parent c45facf2ca
commit 9886d897e2
1 changed files with 11 additions and 5 deletions
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16
src/cpuinfo/SDL_cpuinfo.c
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@ -50,10 +50,13 @@
#endif
#if defined(__MACOSX__) && (defined(__ppc__) || defined(__ppc64__))
#include <sys/sysctl.h> /* For AltiVec check */
#elif (defined(__OpenBSD__) || defined(__FreeBSD__)) && defined(__powerpc__)
#elif defined(__OpenBSD__) && defined(__powerpc__)
#include <sys/param.h>
#include <sys/sysctl.h> /* For AltiVec check */
#include <machine/cpu.h>
#elif defined(__FreeBSD__) && defined(__powerpc__)
#include <machine/cpu.h>
#include <sys/auxv.h>
#elif SDL_ALTIVEC_BLITTERS && HAVE_SETJMP
#include <signal.h>
#include <setjmp.h>
@ -110,7 +113,7 @@
#define CPU_HAS_AVX512F (1 << 12)
#define CPU_HAS_ARM_SIMD (1 << 13)
#if SDL_ALTIVEC_BLITTERS && HAVE_SETJMP && !__MACOSX__ && !__OpenBSD__
#if SDL_ALTIVEC_BLITTERS && HAVE_SETJMP && !__MACOSX__ && !__OpenBSD__ && !__FreeBSD__
/* This is the brute force way of detecting instruction sets...
the idea is borrowed from the libmpeg2 library - thanks!
*/
@ -314,11 +317,9 @@ CPU_haveAltiVec(void)
{
volatile int altivec = 0;
#ifndef SDL_CPUINFO_DISABLED
#if (defined(__MACOSX__) && (defined(__ppc__) || defined(__ppc64__))) || (defined(__OpenBSD__) && defined(__powerpc__)) || (defined(__FreeBSD__) && defined(__powerpc__))
#if (defined(__MACOSX__) && (defined(__ppc__) || defined(__ppc64__))) || (defined(__OpenBSD__) && defined(__powerpc__))
#ifdef __OpenBSD__
int selectors[2] = { CTL_MACHDEP, CPU_ALTIVEC };
#elif defined(__FreeBSD__)
int selectors[2] = { CTL_HW, PPC_FEATURE_HAS_ALTIVEC };
#else
int selectors[2] = { CTL_HW, HW_VECTORUNIT };
#endif
@ -327,6 +328,11 @@ CPU_haveAltiVec(void)
int error = sysctl(selectors, 2, &hasVectorUnit, &length, NULL, 0);
if (0 == error)
altivec = (hasVectorUnit != 0);
#elif defined(__FreeBSD__) && defined(__powerpc__)
unsigned long cpufeatures = 0;
elf_aux_info(AT_HWCAP, &cpufeatures, sizeof(cpufeatures));
altivec = cpufeatures & PPC_FEATURE_HAS_ALTIVEC;
return altivec;
#elif SDL_ALTIVEC_BLITTERS && HAVE_SETJMP
void (*handler) (int sig);
handler = signal(SIGILL, illegal_instruction);