Mercurial > sdl-ios-xcode
diff src/video/mmx.h @ 1895:c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 10 Jul 2006 21:04:37 +0000 |
| parents | 450721ad5436 |
| children | f2c2f0ecba5f |
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--- a/src/video/mmx.h Thu Jul 06 18:01:37 2006 +0000 +++ b/src/video/mmx.h Mon Jul 10 21:04:37 2006 +0000 @@ -43,17 +43,18 @@ by LL and unsigned long long values by ULL, lest they be truncated by the compiler) */ -typedef union { - long long q; /* Quadword (64-bit) value */ - unsigned long long uq; /* Unsigned Quadword */ - int d[2]; /* 2 Doubleword (32-bit) values */ - unsigned int ud[2]; /* 2 Unsigned Doubleword */ - short w[4]; /* 4 Word (16-bit) values */ - unsigned short uw[4]; /* 4 Unsigned Word */ - 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 */ +typedef union +{ + long long q; /* Quadword (64-bit) value */ + unsigned long long uq; /* Unsigned Quadword */ + int d[2]; /* 2 Doubleword (32-bit) values */ + unsigned int ud[2]; /* 2 Unsigned Doubleword */ + short w[4]; /* 4 Word (16-bit) values */ + unsigned short uw[4]; /* 4 Unsigned Word */ + 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 */ #if 0 @@ -62,158 +63,95 @@ inline extern int mm_support(void) { - /* Returns 1 if MMX instructions are supported, - 3 if Cyrix MMX and Extended MMX instructions are supported - 5 if AMD MMX and 3DNow! instructions are supported - 0 if hardware does not support any of these - */ - 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... */ - + /* Returns 1 if MMX instructions are supported, + 3 if Cyrix MMX and Extended MMX instructions are supported + 5 if AMD MMX and 3DNow! instructions are supported + 0 if hardware does not support any of these + */ + register int rval = 0; - /* 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 */ + __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"); - /* 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); + /* Return */ + return (rval); } /* Function to test if mmx instructions are supported... @@ -221,8 +159,8 @@ inline extern int mmx_ok(void) { - /* Returns 1 if MMX instructions are supported, 0 otherwise */ - return ( mm_support() & 0x1 ); + /* Returns 1 if MMX instructions are supported, 0 otherwise */ + return (mm_support() & 0x1); } #endif @@ -701,4 +639,4 @@ #endif #endif - +/* vi: set ts=4 sw=4 expandtab: */