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comparison src/video/mmx.h @ 1668:4da1ee79c9af SDL-1.3

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more tweaking indent options
author Sam Lantinga <slouken@libsdl.org>
date Mon, 29 May 2006 04:04:35 +0000
parents 782fd950bd46
children
comparison
equal deleted inserted replaced
1667:1fddae038bc8 1668:4da1ee79c9af
52 short w[4]; /* 4 Word (16-bit) values */ 52 short w[4]; /* 4 Word (16-bit) values */
53 unsigned short uw[4]; /* 4 Unsigned Word */ 53 unsigned short uw[4]; /* 4 Unsigned Word */
54 char b[8]; /* 8 Byte (8-bit) values */ 54 char b[8]; /* 8 Byte (8-bit) values */
55 unsigned char ub[8]; /* 8 Unsigned Byte */ 55 unsigned char ub[8]; /* 8 Unsigned Byte */
56 float s[2]; /* Single-precision (32-bit) value */ 56 float s[2]; /* Single-precision (32-bit) value */
57 } __attribute__ ((aligned (8))) mmx_t; /* On an 8-byte (64-bit) boundary */ 57 } __attribute__ ((aligned(8))) mmx_t; /* On an 8-byte (64-bit) boundary */
58 58
59 59
60 #if 0 60 #if 0
61 /* Function to test if multimedia instructions are supported... 61 /* Function to test if multimedia instructions are supported...
62 */ 62 */
63 inline extern int 63 inline extern int
64 mm_support (void) 64 mm_support(void)
65 { 65 {
66 /* Returns 1 if MMX instructions are supported, 66 /* Returns 1 if MMX instructions are supported,
67 3 if Cyrix MMX and Extended MMX instructions are supported 67 3 if Cyrix MMX and Extended MMX instructions are supported
68 5 if AMD MMX and 3DNow! instructions are supported 68 5 if AMD MMX and 3DNow! instructions are supported
69 0 if hardware does not support any of these 69 0 if hardware does not support any of these
70 */ 70 */
71 register int rval = 0; 71 register int rval = 0;
72 72
73 __asm__ __volatile__ ( 73 __asm__ __volatile__(
74 /* See if CPUID instruction is supported ... */ 74 /* See if CPUID instruction is supported ... */
75 /* ... Get copies of EFLAGS into eax and ecx */ 75 /* ... Get copies of EFLAGS into eax and ecx */
76 "pushf\n\t" 76 "pushf\n\t"
77 "popl %%eax\n\t" "movl %%eax, %%ecx\n\t" 77 "popl %%eax\n\t" "movl %%eax, %%ecx\n\t"
78 /* ... Toggle the ID bit in one copy and store */ 78 /* ... Toggle the ID bit in one copy and store */
79 /* to the EFLAGS reg */ 79 /* to the EFLAGS reg */
80 "xorl $0x200000, %%eax\n\t" 80 "xorl $0x200000, %%eax\n\t"
81 "push %%eax\n\t" "popf\n\t" 81 "push %%eax\n\t" "popf\n\t"
82 /* ... Get the (hopefully modified) EFLAGS */ 82 /* ... Get the (hopefully modified) EFLAGS */
83 "pushf\n\t" "popl %%eax\n\t" 83 "pushf\n\t" "popl %%eax\n\t"
84 /* ... Compare and test result */ 84 /* ... Compare and test result */
85 "xorl %%eax, %%ecx\n\t" "testl $0x200000, %%ecx\n\t" "jz NotSupported1\n\t" /* CPUID not supported */ 85 "xorl %%eax, %%ecx\n\t" "testl $0x200000, %%ecx\n\t" "jz NotSupported1\n\t" /* CPUID not supported */
86 /* Get standard CPUID information, and 86 /* Get standard CPUID information, and
87 go to a specific vendor section */ 87 go to a specific vendor section */
88 "movl $0, %%eax\n\t" "cpuid\n\t" 88 "movl $0, %%eax\n\t" "cpuid\n\t"
89 /* Check for Intel */ 89 /* Check for Intel */
90 "cmpl $0x756e6547, %%ebx\n\t" 90 "cmpl $0x756e6547, %%ebx\n\t"
91 "jne TryAMD\n\t" 91 "jne TryAMD\n\t"
92 "cmpl $0x49656e69, %%edx\n\t" 92 "cmpl $0x49656e69, %%edx\n\t"
93 "jne TryAMD\n\t" 93 "jne TryAMD\n\t"
94 "cmpl $0x6c65746e, %%ecx\n" 94 "cmpl $0x6c65746e, %%ecx\n"
95 "jne TryAMD\n\t" "jmp Intel\n\t" 95 "jne TryAMD\n\t" "jmp Intel\n\t"
96 /* Check for AMD */ 96 /* Check for AMD */
97 "\nTryAMD:\n\t" 97 "\nTryAMD:\n\t"
98 "cmpl $0x68747541, %%ebx\n\t" 98 "cmpl $0x68747541, %%ebx\n\t"
99 "jne TryCyrix\n\t" 99 "jne TryCyrix\n\t"
100 "cmpl $0x69746e65, %%edx\n\t" 100 "cmpl $0x69746e65, %%edx\n\t"
101 "jne TryCyrix\n\t" 101 "jne TryCyrix\n\t"
102 "cmpl $0x444d4163, %%ecx\n" 102 "cmpl $0x444d4163, %%ecx\n"
103 "jne TryCyrix\n\t" "jmp AMD\n\t" 103 "jne TryCyrix\n\t" "jmp AMD\n\t"
104 /* Check for Cyrix */ 104 /* Check for Cyrix */
105 "\nTryCyrix:\n\t" 105 "\nTryCyrix:\n\t"
106 "cmpl $0x69727943, %%ebx\n\t" 106 "cmpl $0x69727943, %%ebx\n\t"
107 "jne NotSupported2\n\t" 107 "jne NotSupported2\n\t"
108 "cmpl $0x736e4978, %%edx\n\t" 108 "cmpl $0x736e4978, %%edx\n\t"
109 "jne NotSupported3\n\t" 109 "jne NotSupported3\n\t"
110 "cmpl $0x64616574, %%ecx\n\t" 110 "cmpl $0x64616574, %%ecx\n\t"
111 "jne NotSupported4\n\t" 111 "jne NotSupported4\n\t"
112 /* Drop through to Cyrix... */ 112 /* Drop through to Cyrix... */
113 /* Cyrix Section */ 113 /* Cyrix Section */
114 /* See if extended CPUID level 80000001 is supported */ 114 /* See if extended CPUID level 80000001 is supported */
115 /* The value of CPUID/80000001 for the 6x86MX is undefined 115 /* The value of CPUID/80000001 for the 6x86MX is undefined
116 according to the Cyrix CPU Detection Guide (Preliminary 116 according to the Cyrix CPU Detection Guide (Preliminary
117 Rev. 1.01 table 1), so we'll check the value of eax for 117 Rev. 1.01 table 1), so we'll check the value of eax for
118 CPUID/0 to see if standard CPUID level 2 is supported. 118 CPUID/0 to see if standard CPUID level 2 is supported.
119 According to the table, the only CPU which supports level 119 According to the table, the only CPU which supports level
120 2 is also the only one which supports extended CPUID levels. 120 2 is also the only one which supports extended CPUID levels.
121 */ 121 */
122 "cmpl $0x2, %%eax\n\t" "jne MMXtest\n\t" /* Use standard CPUID instead */ 122 "cmpl $0x2, %%eax\n\t" "jne MMXtest\n\t" /* Use standard CPUID instead */
123 /* Extended CPUID supported (in theory), so get extended 123 /* Extended CPUID supported (in theory), so get extended
124 features */ 124 features */
125 "movl $0x80000001, %%eax\n\t" "cpuid\n\t" "testl $0x00800000, %%eax\n\t" /* Test for MMX */ 125 "movl $0x80000001, %%eax\n\t" "cpuid\n\t" "testl $0x00800000, %%eax\n\t" /* Test for MMX */
126 "jz NotSupported5\n\t" /* MMX not supported */ 126 "jz NotSupported5\n\t" /* MMX not supported */
127 "testl $0x01000000, %%eax\n\t" /* Test for Ext'd MMX */ 127 "testl $0x01000000, %%eax\n\t" /* Test for Ext'd MMX */
128 "jnz EMMXSupported\n\t" "movl $1, %0:\n\n\t" /* MMX Supported */ 128 "jnz EMMXSupported\n\t" "movl $1, %0:\n\n\t" /* MMX Supported */
129 "jmp Return\n\n" "EMMXSupported:\n\t" "movl $3, %0:\n\n\t" /* EMMX and MMX Supported */ 129 "jmp Return\n\n" "EMMXSupported:\n\t" "movl $3, %0:\n\n\t" /* EMMX and MMX Supported */
130 "jmp Return\n\t" 130 "jmp Return\n\t"
131 /* AMD Section */ 131 /* AMD Section */
132 "AMD:\n\t" 132 "AMD:\n\t"
133 /* See if extended CPUID is supported */ 133 /* See if extended CPUID is supported */
134 "movl $0x80000000, %%eax\n\t" "cpuid\n\t" "cmpl $0x80000000, %%eax\n\t" "jl MMXtest\n\t" /* Use standard CPUID instead */ 134 "movl $0x80000000, %%eax\n\t" "cpuid\n\t" "cmpl $0x80000000, %%eax\n\t" "jl MMXtest\n\t" /* Use standard CPUID instead */
135 /* Extended CPUID supported, so get extended features */ 135 /* Extended CPUID supported, so get extended features */
136 "movl $0x80000001, %%eax\n\t" "cpuid\n\t" "testl $0x00800000, %%edx\n\t" /* Test for MMX */ 136 "movl $0x80000001, %%eax\n\t" "cpuid\n\t" "testl $0x00800000, %%edx\n\t" /* Test for MMX */
137 "jz NotSupported6\n\t" /* MMX not supported */ 137 "jz NotSupported6\n\t" /* MMX not supported */
138 "testl $0x80000000, %%edx\n\t" /* Test for 3DNow! */ 138 "testl $0x80000000, %%edx\n\t" /* Test for 3DNow! */
139 "jnz ThreeDNowSupported\n\t" "movl $1, %0:\n\n\t" /* MMX Supported */ 139 "jnz ThreeDNowSupported\n\t" "movl $1, %0:\n\n\t" /* MMX Supported */
140 "jmp Return\n\n" "ThreeDNowSupported:\n\t" "movl $5, %0:\n\n\t" /* 3DNow! and MMX Supported */ 140 "jmp Return\n\n" "ThreeDNowSupported:\n\t" "movl $5, %0:\n\n\t" /* 3DNow! and MMX Supported */
141 "jmp Return\n\t" 141 "jmp Return\n\t"
142 /* Intel Section */ 142 /* Intel Section */
143 "Intel:\n\t" 143 "Intel:\n\t"
144 /* Check for MMX */ 144 /* Check for MMX */
145 "MMXtest:\n\t" "movl $1, %%eax\n\t" "cpuid\n\t" "testl $0x00800000, %%edx\n\t" /* Test for MMX */ 145 "MMXtest:\n\t" "movl $1, %%eax\n\t" "cpuid\n\t" "testl $0x00800000, %%edx\n\t" /* Test for MMX */
146 "jz NotSupported7\n\t" /* MMX Not supported */ 146 "jz NotSupported7\n\t" /* MMX Not supported */
147 "movl $1, %0:\n\n\t" /* MMX Supported */ 147 "movl $1, %0:\n\n\t" /* MMX Supported */
148 "jmp Return\n\t" 148 "jmp Return\n\t"
149 /* Nothing supported */ 149 /* Nothing supported */
150 "\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 */ 150 "\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 */
151 :"eax", "ebx", "ecx", "edx"); 151 :"eax", "ebx", "ecx", "edx");
152 152
153 /* Return */ 153 /* Return */
154 return (rval); 154 return (rval);
155 } 155 }
156 156
157 /* Function to test if mmx instructions are supported... 157 /* Function to test if mmx instructions are supported...
158 */ 158 */
159 inline extern int 159 inline extern int
160 mmx_ok (void) 160 mmx_ok(void)
161 { 161 {
162 /* Returns 1 if MMX instructions are supported, 0 otherwise */ 162 /* Returns 1 if MMX instructions are supported, 0 otherwise */
163 return (mm_support () & 0x1); 163 return (mm_support() & 0x1);
164 } 164 }
165 #endif 165 #endif
166 166
167 /* Helper functions for the instruction macros that follow... 167 /* Helper functions for the instruction macros that follow...
168 (note that memory-to-register, m2r, instructions are nearly 168 (note that memory-to-register, m2r, instructions are nearly