Mercurial > sdl-ios-xcode
diff src/video/mmx.h @ 1668:4da1ee79c9af SDL-1.3
more tweaking indent options
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 29 May 2006 04:04:35 +0000 |
| parents | 782fd950bd46 |
| children |
line wrap: on
line diff
--- a/src/video/mmx.h Mon May 29 03:53:21 2006 +0000 +++ b/src/video/mmx.h Mon May 29 04:04:35 2006 +0000 @@ -54,14 +54,14 @@ char b[8]; /* 8 Byte (8-bit) values */ unsigned char ub[8]; /* 8 Unsigned Byte */ float s[2]; /* Single-precision (32-bit) value */ -} __attribute__ ((aligned (8))) mmx_t; /* On an 8-byte (64-bit) boundary */ +} __attribute__ ((aligned(8))) mmx_t; /* On an 8-byte (64-bit) boundary */ #if 0 /* Function to test if multimedia instructions are supported... */ inline extern int -mm_support (void) +mm_support(void) { /* Returns 1 if MMX instructions are supported, 3 if Cyrix MMX and Extended MMX instructions are supported @@ -70,85 +70,85 @@ */ register int rval = 0; - __asm__ __volatile__ ( - /* See if CPUID instruction is supported ... */ - /* ... Get copies of EFLAGS into eax and ecx */ - "pushf\n\t" - "popl %%eax\n\t" "movl %%eax, %%ecx\n\t" - /* ... Toggle the ID bit in one copy and store */ - /* to the EFLAGS reg */ - "xorl $0x200000, %%eax\n\t" - "push %%eax\n\t" "popf\n\t" - /* ... Get the (hopefully modified) EFLAGS */ - "pushf\n\t" "popl %%eax\n\t" - /* ... Compare and test result */ - "xorl %%eax, %%ecx\n\t" "testl $0x200000, %%ecx\n\t" "jz NotSupported1\n\t" /* CPUID not supported */ - /* Get standard CPUID information, and - go to a specific vendor section */ - "movl $0, %%eax\n\t" "cpuid\n\t" - /* Check for Intel */ - "cmpl $0x756e6547, %%ebx\n\t" - "jne TryAMD\n\t" - "cmpl $0x49656e69, %%edx\n\t" - "jne TryAMD\n\t" - "cmpl $0x6c65746e, %%ecx\n" - "jne TryAMD\n\t" "jmp Intel\n\t" - /* Check for AMD */ - "\nTryAMD:\n\t" - "cmpl $0x68747541, %%ebx\n\t" - "jne TryCyrix\n\t" - "cmpl $0x69746e65, %%edx\n\t" - "jne TryCyrix\n\t" - "cmpl $0x444d4163, %%ecx\n" - "jne TryCyrix\n\t" "jmp AMD\n\t" - /* Check for Cyrix */ - "\nTryCyrix:\n\t" - "cmpl $0x69727943, %%ebx\n\t" - "jne NotSupported2\n\t" - "cmpl $0x736e4978, %%edx\n\t" - "jne NotSupported3\n\t" - "cmpl $0x64616574, %%ecx\n\t" - "jne NotSupported4\n\t" - /* Drop through to Cyrix... */ - /* Cyrix Section */ - /* See if extended CPUID level 80000001 is supported */ - /* The value of CPUID/80000001 for the 6x86MX is undefined - according to the Cyrix CPU Detection Guide (Preliminary - Rev. 1.01 table 1), so we'll check the value of eax for - CPUID/0 to see if standard CPUID level 2 is supported. - According to the table, the only CPU which supports level - 2 is also the only one which supports extended CPUID levels. - */ - "cmpl $0x2, %%eax\n\t" "jne MMXtest\n\t" /* Use standard CPUID instead */ - /* Extended CPUID supported (in theory), so get extended - features */ - "movl $0x80000001, %%eax\n\t" "cpuid\n\t" "testl $0x00800000, %%eax\n\t" /* Test for MMX */ - "jz NotSupported5\n\t" /* MMX not supported */ - "testl $0x01000000, %%eax\n\t" /* Test for Ext'd MMX */ - "jnz EMMXSupported\n\t" "movl $1, %0:\n\n\t" /* MMX Supported */ - "jmp Return\n\n" "EMMXSupported:\n\t" "movl $3, %0:\n\n\t" /* EMMX and MMX Supported */ - "jmp Return\n\t" - /* AMD Section */ - "AMD:\n\t" - /* See if extended CPUID is supported */ - "movl $0x80000000, %%eax\n\t" "cpuid\n\t" "cmpl $0x80000000, %%eax\n\t" "jl MMXtest\n\t" /* Use standard CPUID instead */ - /* Extended CPUID supported, so get extended features */ - "movl $0x80000001, %%eax\n\t" "cpuid\n\t" "testl $0x00800000, %%edx\n\t" /* Test for MMX */ - "jz NotSupported6\n\t" /* MMX not supported */ - "testl $0x80000000, %%edx\n\t" /* Test for 3DNow! */ - "jnz ThreeDNowSupported\n\t" "movl $1, %0:\n\n\t" /* MMX Supported */ - "jmp Return\n\n" "ThreeDNowSupported:\n\t" "movl $5, %0:\n\n\t" /* 3DNow! and MMX Supported */ - "jmp Return\n\t" - /* Intel Section */ - "Intel:\n\t" - /* Check for MMX */ - "MMXtest:\n\t" "movl $1, %%eax\n\t" "cpuid\n\t" "testl $0x00800000, %%edx\n\t" /* Test for MMX */ - "jz NotSupported7\n\t" /* MMX Not supported */ - "movl $1, %0:\n\n\t" /* MMX Supported */ - "jmp Return\n\t" - /* Nothing supported */ - "\nNotSupported1:\n\t" "#movl $101, %0:\n\n\t" "\nNotSupported2:\n\t" "#movl $102, %0:\n\n\t" "\nNotSupported3:\n\t" "#movl $103, %0:\n\n\t" "\nNotSupported4:\n\t" "#movl $104, %0:\n\n\t" "\nNotSupported5:\n\t" "#movl $105, %0:\n\n\t" "\nNotSupported6:\n\t" "#movl $106, %0:\n\n\t" "\nNotSupported7:\n\t" "#movl $107, %0:\n\n\t" "movl $0, %0:\n\n\t" "Return:\n\t":"=a" (rval): /* no input */ - :"eax", "ebx", "ecx", "edx"); + __asm__ __volatile__( + /* See if CPUID instruction is supported ... */ + /* ... Get copies of EFLAGS into eax and ecx */ + "pushf\n\t" + "popl %%eax\n\t" "movl %%eax, %%ecx\n\t" + /* ... Toggle the ID bit in one copy and store */ + /* to the EFLAGS reg */ + "xorl $0x200000, %%eax\n\t" + "push %%eax\n\t" "popf\n\t" + /* ... Get the (hopefully modified) EFLAGS */ + "pushf\n\t" "popl %%eax\n\t" + /* ... Compare and test result */ + "xorl %%eax, %%ecx\n\t" "testl $0x200000, %%ecx\n\t" "jz NotSupported1\n\t" /* CPUID not supported */ + /* Get standard CPUID information, and + go to a specific vendor section */ + "movl $0, %%eax\n\t" "cpuid\n\t" + /* Check for Intel */ + "cmpl $0x756e6547, %%ebx\n\t" + "jne TryAMD\n\t" + "cmpl $0x49656e69, %%edx\n\t" + "jne TryAMD\n\t" + "cmpl $0x6c65746e, %%ecx\n" + "jne TryAMD\n\t" "jmp Intel\n\t" + /* Check for AMD */ + "\nTryAMD:\n\t" + "cmpl $0x68747541, %%ebx\n\t" + "jne TryCyrix\n\t" + "cmpl $0x69746e65, %%edx\n\t" + "jne TryCyrix\n\t" + "cmpl $0x444d4163, %%ecx\n" + "jne TryCyrix\n\t" "jmp AMD\n\t" + /* Check for Cyrix */ + "\nTryCyrix:\n\t" + "cmpl $0x69727943, %%ebx\n\t" + "jne NotSupported2\n\t" + "cmpl $0x736e4978, %%edx\n\t" + "jne NotSupported3\n\t" + "cmpl $0x64616574, %%ecx\n\t" + "jne NotSupported4\n\t" + /* Drop through to Cyrix... */ + /* Cyrix Section */ + /* See if extended CPUID level 80000001 is supported */ + /* The value of CPUID/80000001 for the 6x86MX is undefined + according to the Cyrix CPU Detection Guide (Preliminary + Rev. 1.01 table 1), so we'll check the value of eax for + CPUID/0 to see if standard CPUID level 2 is supported. + According to the table, the only CPU which supports level + 2 is also the only one which supports extended CPUID levels. + */ + "cmpl $0x2, %%eax\n\t" "jne MMXtest\n\t" /* Use standard CPUID instead */ + /* Extended CPUID supported (in theory), so get extended + features */ + "movl $0x80000001, %%eax\n\t" "cpuid\n\t" "testl $0x00800000, %%eax\n\t" /* Test for MMX */ + "jz NotSupported5\n\t" /* MMX not supported */ + "testl $0x01000000, %%eax\n\t" /* Test for Ext'd MMX */ + "jnz EMMXSupported\n\t" "movl $1, %0:\n\n\t" /* MMX Supported */ + "jmp Return\n\n" "EMMXSupported:\n\t" "movl $3, %0:\n\n\t" /* EMMX and MMX Supported */ + "jmp Return\n\t" + /* AMD Section */ + "AMD:\n\t" + /* See if extended CPUID is supported */ + "movl $0x80000000, %%eax\n\t" "cpuid\n\t" "cmpl $0x80000000, %%eax\n\t" "jl MMXtest\n\t" /* Use standard CPUID instead */ + /* Extended CPUID supported, so get extended features */ + "movl $0x80000001, %%eax\n\t" "cpuid\n\t" "testl $0x00800000, %%edx\n\t" /* Test for MMX */ + "jz NotSupported6\n\t" /* MMX not supported */ + "testl $0x80000000, %%edx\n\t" /* Test for 3DNow! */ + "jnz ThreeDNowSupported\n\t" "movl $1, %0:\n\n\t" /* MMX Supported */ + "jmp Return\n\n" "ThreeDNowSupported:\n\t" "movl $5, %0:\n\n\t" /* 3DNow! and MMX Supported */ + "jmp Return\n\t" + /* Intel Section */ + "Intel:\n\t" + /* Check for MMX */ + "MMXtest:\n\t" "movl $1, %%eax\n\t" "cpuid\n\t" "testl $0x00800000, %%edx\n\t" /* Test for MMX */ + "jz NotSupported7\n\t" /* MMX Not supported */ + "movl $1, %0:\n\n\t" /* MMX Supported */ + "jmp Return\n\t" + /* Nothing supported */ + "\nNotSupported1:\n\t" "#movl $101, %0:\n\n\t" "\nNotSupported2:\n\t" "#movl $102, %0:\n\n\t" "\nNotSupported3:\n\t" "#movl $103, %0:\n\n\t" "\nNotSupported4:\n\t" "#movl $104, %0:\n\n\t" "\nNotSupported5:\n\t" "#movl $105, %0:\n\n\t" "\nNotSupported6:\n\t" "#movl $106, %0:\n\n\t" "\nNotSupported7:\n\t" "#movl $107, %0:\n\n\t" "movl $0, %0:\n\n\t" "Return:\n\t":"=a"(rval): /* no input */ + :"eax", "ebx", "ecx", "edx"); /* Return */ return (rval); @@ -157,10 +157,10 @@ /* Function to test if mmx instructions are supported... */ inline extern int -mmx_ok (void) +mmx_ok(void) { /* Returns 1 if MMX instructions are supported, 0 otherwise */ - return (mm_support () & 0x1); + return (mm_support() & 0x1); } #endif