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comparison src/cpuinfo/SDL_cpuinfo.c @ 1361:19418e4422cb

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New configure-based build system. Still work in progress, but much improved
author Sam Lantinga <slouken@libsdl.org>
date Thu, 16 Feb 2006 10:11:48 +0000
parents c9b51268668f
children d910939febfa
comparison
equal deleted inserted replaced
1360:70a9cfb4cf1b 1361:19418e4422cb
20 slouken@libsdl.org 20 slouken@libsdl.org
21 */ 21 */
22 22
23 /* CPU feature detection for SDL */ 23 /* CPU feature detection for SDL */
24 24
25 #ifdef unix /* FIXME: Better setjmp detection? */ 25 #include "SDL.h"
26 #define USE_SETJMP 26 #include "SDL_cpuinfo.h"
27
28 #if SDL_ALTIVEC_BLITTERS && HAVE_SETJMP
27 #include <signal.h> 29 #include <signal.h>
28 #include <setjmp.h> 30 #include <setjmp.h>
29 #endif 31 #endif
30 32
31 #include "SDL.h" 33 #if MACOSX
32 #include "SDL_cpuinfo.h"
33
34 #ifdef MACOSX
35 #include <sys/sysctl.h> /* For AltiVec check */ 34 #include <sys/sysctl.h> /* For AltiVec check */
36 #endif 35 #endif
37 36
38 #define CPU_HAS_RDTSC 0x00000001 37 #define CPU_HAS_RDTSC 0x00000001
39 #define CPU_HAS_MMX 0x00000002 38 #define CPU_HAS_MMX 0x00000002
42 #define CPU_HAS_3DNOWEXT 0x00000020 41 #define CPU_HAS_3DNOWEXT 0x00000020
43 #define CPU_HAS_SSE 0x00000040 42 #define CPU_HAS_SSE 0x00000040
44 #define CPU_HAS_SSE2 0x00000080 43 #define CPU_HAS_SSE2 0x00000080
45 #define CPU_HAS_ALTIVEC 0x00000100 44 #define CPU_HAS_ALTIVEC 0x00000100
46 45
47 #if defined(USE_SETJMP) && defined(GCC_ALTIVEC) 46 #if SDL_ALTIVEC_BLITTERS && HAVE_SETJMP
48 /* This is the brute force way of detecting instruction sets... 47 /* This is the brute force way of detecting instruction sets...
49 the idea is borrowed from the libmpeg2 library - thanks! 48 the idea is borrowed from the libmpeg2 library - thanks!
50 */ 49 */
51 static jmp_buf jmpbuf; 50 static jmp_buf jmpbuf;
52 static void illegal_instruction(int sig) 51 static void illegal_instruction(int sig)
53 { 52 {
54 longjmp(jmpbuf, 1); 53 longjmp(jmpbuf, 1);
55 } 54 }
56 #endif // USE_SETJMP 55 #endif /* HAVE_SETJMP */
57 56
58 static __inline__ int CPU_haveCPUID() 57 static __inline__ int CPU_haveCPUID()
59 { 58 {
60 int has_CPUID = 0; 59 int has_CPUID = 0;
61 #if defined(__GNUC__) && defined(i386) 60 #if defined(__GNUC__) && defined(i386)
110 jz done ; Processor=80486 109 jz done ; Processor=80486
111 mov has_CPUID,1 ; We have CPUID support 110 mov has_CPUID,1 ; We have CPUID support
112 done: 111 done:
113 } 112 }
114 #elif defined(__sun) && defined(__x86) 113 #elif defined(__sun) && defined(__x86)
115 __asm ( 114 __asm (
116 " pushfl \n" 115 " pushfl \n"
117 " popl %eax \n" 116 " popl %eax \n"
118 " movl %eax,%ecx \n" 117 " movl %eax,%ecx \n"
119 " xorl $0x200000,%eax \n" 118 " xorl $0x200000,%eax \n"
120 " pushl %eax \n" 119 " pushl %eax \n"
121 " popfl \n" 120 " popfl \n"
122 " pushfl \n" 121 " pushfl \n"
123 " popl %eax \n" 122 " popl %eax \n"
124 " xorl %ecx,%eax \n" 123 " xorl %ecx,%eax \n"
125 " jz 1f \n" 124 " jz 1f \n"
126 " movl $1,-8(%ebp) \n" 125 " movl $1,-8(%ebp) \n"
127 "1: \n" 126 "1: \n"
128 ); 127 );
129 #elif defined(__sun) && defined(__amd64) 128 #elif defined(__sun) && defined(__amd64)
130 __asm ( 129 __asm (
131 " pushfq \n" 130 " pushfq \n"
306 } 305 }
307 306
308 static __inline__ int CPU_haveAltiVec() 307 static __inline__ int CPU_haveAltiVec()
309 { 308 {
310 volatile int altivec = 0; 309 volatile int altivec = 0;
311 #ifdef MACOSX 310 #if MACOSX
312 int selectors[2] = { CTL_HW, HW_VECTORUNIT }; 311 int selectors[2] = { CTL_HW, HW_VECTORUNIT };
313 int hasVectorUnit = 0; 312 int hasVectorUnit = 0;
314 size_t length = sizeof(hasVectorUnit); 313 size_t length = sizeof(hasVectorUnit);
315 int error = sysctl(selectors, 2, &hasVectorUnit, &length, NULL, 0); 314 int error = sysctl(selectors, 2, &hasVectorUnit, &length, NULL, 0);
316 if( 0 == error ) 315 if( 0 == error )
317 altivec = (hasVectorUnit != 0); 316 altivec = (hasVectorUnit != 0);
318 #elif defined(USE_SETJMP) && defined(GCC_ALTIVEC) 317 #elif SDL_ALTIVEC_BLITTERS && HAVE_SETJMP
319 void (*handler)(int sig); 318 void (*handler)(int sig);
320 handler = signal(SIGILL, illegal_instruction); 319 handler = signal(SIGILL, illegal_instruction);
321 if ( setjmp(jmpbuf) == 0 ) { 320 if ( setjmp(jmpbuf) == 0 ) {
322 asm volatile ("mtspr 256, %0\n\t" 321 asm volatile ("mtspr 256, %0\n\t"
323 "vand %%v0, %%v0, %%v0" 322 "vand %%v0, %%v0, %%v0"