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Re-added the 3DNow! and AltiVec instruction support.

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This commit is contained in:
Sam Lantinga 2011-02-22 21:44:36 -08:00
parent 92bf0fc2fd
commit e4a0db291e
15 changed files with 2412 additions and 58 deletions
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89
src/cpuinfo/SDL_cpuinfo.c
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@ -32,18 +32,37 @@
#include <sys/types.h>
#include <sys/sysctl.h>
#endif
#if defined(__MACOSX__) && (defined(__ppc__) || defined(__ppc64__))
#include <sys/sysctl.h> /* For AltiVec check */
#elif SDL_ALTIVEC_BLITTERS && HAVE_SETJMP
#include <signal.h>
#include <setjmp.h>
#endif
#ifdef __WIN32__
#include "../core/windows/SDL_windows.h"
#endif
#define CPU_HAS_RDTSC 0x00000001
#define CPU_HAS_MMX 0x00000002
#define CPU_HAS_ALTIVEC 0x00000002
#define CPU_HAS_MMX 0x00000004
#define CPU_HAS_3DNOW 0x00000008
#define CPU_HAS_SSE 0x00000010
#define CPU_HAS_SSE2 0x00000020
#define CPU_HAS_SSE3 0x00000040
#define CPU_HAS_SSE41 0x00000080
#define CPU_HAS_SSE42 0x00000100
#define CPU_HAS_SSE41 0x00000100
#define CPU_HAS_SSE42 0x00000200
#if SDL_ALTIVEC_BLITTERS && HAVE_SETJMP && !__MACOSX__
/* This is the brute force way of detecting instruction sets...
the idea is borrowed from the libmpeg2 library - thanks!
*/
static jmp_buf jmpbuf;
static void
illegal_instruction(int sig)
{
longjmp(jmpbuf, 1);
}
#endif /* HAVE_SETJMP */
static __inline__ int
CPU_haveCPUID(void)
@ -192,6 +211,29 @@ CPU_haveRDTSC(void)
return 0;
}
static __inline__ int
CPU_haveAltiVec(void)
{
volatile int altivec = 0;
#if defined(__MACOSX__) && (defined(__ppc__) || defined(__ppc64__))
int selectors[2] = { CTL_HW, HW_VECTORUNIT };
int hasVectorUnit = 0;
size_t length = sizeof(hasVectorUnit);
int error = sysctl(selectors, 2, &hasVectorUnit, &length, NULL, 0);
if (0 == error)
altivec = (hasVectorUnit != 0);
#elif SDL_ALTIVEC_BLITTERS && HAVE_SETJMP
void (*handler) (int sig);
handler = signal(SIGILL, illegal_instruction);
if (setjmp(jmpbuf) == 0) {
asm volatile ("mtspr 256, %0\n\t" "vand %%v0, %%v0, %%v0"::"r" (-1));
altivec = 1;
}
signal(SIGILL, handler);
#endif
return altivec;
}
static __inline__ int
CPU_haveMMX(void)
{
@ -201,6 +243,21 @@ CPU_haveMMX(void)
return 0;
}
static __inline__ int
CPU_have3DNow(void)
{
if (CPU_haveCPUID()) {
int a, b, c, d;
cpuid(0x80000000, a, b, c, d);
if (a >= 0x80000001) {
cpuid(0x80000001, a, b, c, d);
return (d & 0x80000000);
}
}
return 0;
}
static __inline__ int
CPU_haveSSE(void)
{
@ -431,9 +488,15 @@ SDL_GetCPUFeatures(void)
if (CPU_haveRDTSC()) {
SDL_CPUFeatures |= CPU_HAS_RDTSC;
}
if (CPU_haveAltiVec()) {
SDL_CPUFeatures |= CPU_HAS_ALTIVEC;
}
if (CPU_haveMMX()) {
SDL_CPUFeatures |= CPU_HAS_MMX;
}
if (CPU_have3DNow()) {
SDL_CPUFeatures |= CPU_HAS_3DNOW;
}
if (CPU_haveSSE()) {
SDL_CPUFeatures |= CPU_HAS_SSE;
}
@ -462,6 +525,15 @@ SDL_HasRDTSC(void)
return SDL_FALSE;
}
SDL_bool
SDL_HasAltiVec(void)
{
if (SDL_GetCPUFeatures() & CPU_HAS_ALTIVEC) {
return SDL_TRUE;
}
return SDL_FALSE;
}
SDL_bool
SDL_HasMMX(void)
{
@ -471,6 +543,15 @@ SDL_HasMMX(void)
return SDL_FALSE;
}
SDL_bool
SDL_Has3DNow(void)
{
if (SDL_GetCPUFeatures() & CPU_HAS_3DNOW) {
return SDL_TRUE;
}
return SDL_FALSE;
}
SDL_bool
SDL_HasSSE(void)
{
@ -528,7 +609,9 @@ main()
printf("CPU name: %s\n", SDL_GetCPUName());
printf("CacheLine size: %d\n", SDL_GetCPUCacheLineSize());
printf("RDTSC: %d\n", SDL_HasRDTSC());
printf("Altivec: %d\n", SDL_HasAltiVec());
printf("MMX: %d\n", SDL_HasMMX());
printf("3DNow: %d\n", SDL_Has3DNow());
printf("SSE: %d\n", SDL_HasSSE());
printf("SSE2: %d\n", SDL_HasSSE2());
printf("SSE3: %d\n", SDL_HasSSE3());