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comparison src/cpuinfo/SDL_cpuinfo.c @ 4372:ca91f36ef3de SDL-1.2

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1.2 branch: fixed assembly code register clobbering.
author Ryan C. Gordon <icculus@icculus.org>
date Sun, 01 Nov 2009 17:51:39 +0000
parents 0319c84d274d
children dcb26ac38e6b
comparison
equal deleted inserted replaced
4371:6f74b80cca1d 4372:ca91f36ef3de
146 static __inline__ int CPU_getCPUIDFeatures(void) 146 static __inline__ int CPU_getCPUIDFeatures(void)
147 { 147 {
148 int features = 0; 148 int features = 0;
149 #if defined(__GNUC__) && defined(i386) 149 #if defined(__GNUC__) && defined(i386)
150 __asm__ ( 150 __asm__ (
151 " movl %%ebx,%%edi\n" 151 " pushl %%ebx\n"
152 " xorl %%eax,%%eax # Set up for CPUID instruction \n" 152 " xorl %%eax,%%eax # Set up for CPUID instruction \n"
153 " cpuid # Get and save vendor ID \n" 153 " cpuid # Get and save vendor ID \n"
154 " cmpl $1,%%eax # Make sure 1 is valid input for CPUID\n" 154 " cmpl $1,%%eax # Make sure 1 is valid input for CPUID\n"
155 " jl 1f # We dont have the CPUID instruction\n" 155 " jl 1f # We dont have the CPUID instruction\n"
156 " xorl %%eax,%%eax \n" 156 " xorl %%eax,%%eax \n"
157 " incl %%eax \n" 157 " incl %%eax \n"
158 " cpuid # Get family/model/stepping/features\n" 158 " cpuid # Get family/model/stepping/features\n"
159 " movl %%edx,%0 \n" 159 " movl %%edx,%0 \n"
160 "1: \n" 160 "1: \n"
161 " movl %%edi,%%ebx\n" 161 " popl %%ebx\n"
162 : "=m" (features) 162 : "=m" (features)
163 : 163 :
164 : "%eax", "%ecx", "%edx", "%edi" 164 : "%eax", "%ecx", "%edx"
165 ); 165 );
166 #elif defined(__GNUC__) && defined(__x86_64__) 166 #elif defined(__GNUC__) && defined(__x86_64__)
167 __asm__ ( 167 __asm__ (
168 " movq %%rbx,%%rdi\n" 168 " pushq %%rbx\n"
169 " xorl %%eax,%%eax # Set up for CPUID instruction \n" 169 " xorl %%eax,%%eax # Set up for CPUID instruction \n"
170 " cpuid # Get and save vendor ID \n" 170 " cpuid # Get and save vendor ID \n"
171 " cmpl $1,%%eax # Make sure 1 is valid input for CPUID\n" 171 " cmpl $1,%%eax # Make sure 1 is valid input for CPUID\n"
172 " jl 1f # We dont have the CPUID instruction\n" 172 " jl 1f # We dont have the CPUID instruction\n"
173 " xorl %%eax,%%eax \n" 173 " xorl %%eax,%%eax \n"
174 " incl %%eax \n" 174 " incl %%eax \n"
175 " cpuid # Get family/model/stepping/features\n" 175 " cpuid # Get family/model/stepping/features\n"
176 " movl %%edx,%0 \n" 176 " movl %%edx,%0 \n"
177 "1: \n" 177 "1: \n"
178 " movq %%rdi,%%rbx\n" 178 " popq %%rbx\n"
179 : "=m" (features) 179 : "=m" (features)
180 : 180 :
181 : "%rax", "%rbx", "%rcx", "%rdx", "%rdi" 181 : "%rax", "%rcx", "%rdx"
182 ); 182 );
183 #elif (defined(_MSC_VER) && defined(_M_IX86)) || defined(__WATCOMC__) 183 #elif (defined(_MSC_VER) && defined(_M_IX86)) || defined(__WATCOMC__)
184 __asm { 184 __asm {
185 xor eax, eax ; Set up for CPUID instruction 185 xor eax, eax ; Set up for CPUID instruction
186 cpuid ; Get and save vendor ID 186 cpuid ; Get and save vendor ID
192 mov features, edx 192 mov features, edx
193 done: 193 done:
194 } 194 }
195 #elif defined(__sun) && (defined(__i386) || defined(__amd64)) 195 #elif defined(__sun) && (defined(__i386) || defined(__amd64))
196 __asm( 196 __asm(
197 " movl %ebx,%edi\n" 197 " pushl %ebx\n"
198 " xorl %eax,%eax \n" 198 " xorl %eax,%eax \n"
199 " cpuid \n" 199 " cpuid \n"
200 " cmpl $1,%eax \n" 200 " cmpl $1,%eax \n"
201 " jl 1f \n" 201 " jl 1f \n"
202 " xorl %eax,%eax \n" 202 " xorl %eax,%eax \n"
206 " movl %edx,-8(%ebp) \n" 206 " movl %edx,-8(%ebp) \n"
207 #else 207 #else
208 " movl %edx,-8(%rbp) \n" 208 " movl %edx,-8(%rbp) \n"
209 #endif 209 #endif
210 "1: \n" 210 "1: \n"
211 " movl %edi,%ebx\n" ); 211 " popl %ebx\n" );
212 #endif 212 #endif
213 return features; 213 return features;
214 } 214 }
215 215
216 static __inline__ int CPU_getCPUIDFeaturesExt(void) 216 static __inline__ int CPU_getCPUIDFeaturesExt(void)
217 { 217 {
218 int features = 0; 218 int features = 0;
219 #if defined(__GNUC__) && defined(i386) 219 #if defined(__GNUC__) && defined(i386)
220 __asm__ ( 220 __asm__ (
221 " movl %%ebx,%%edi\n" 221 " pushl %%ebx\n"
222 " movl $0x80000000,%%eax # Query for extended functions \n" 222 " movl $0x80000000,%%eax # Query for extended functions \n"
223 " cpuid # Get extended function limit \n" 223 " cpuid # Get extended function limit \n"
224 " cmpl $0x80000001,%%eax \n" 224 " cmpl $0x80000001,%%eax \n"
225 " jl 1f # Nope, we dont have function 800000001h\n" 225 " jl 1f # Nope, we dont have function 800000001h\n"
226 " movl $0x80000001,%%eax # Setup extended function 800000001h\n" 226 " movl $0x80000001,%%eax # Setup extended function 800000001h\n"
227 " cpuid # and get the information \n" 227 " cpuid # and get the information \n"
228 " movl %%edx,%0 \n" 228 " movl %%edx,%0 \n"
229 "1: \n" 229 "1: \n"
230 " movl %%edi,%%ebx\n" 230 " popl %%ebx\n"
231 : "=m" (features) 231 : "=m" (features)
232 : 232 :
233 : "%eax", "%ecx", "%edx", "%edi" 233 : "%eax", "%ecx", "%edx"
234 ); 234 );
235 #elif defined(__GNUC__) && defined (__x86_64__) 235 #elif defined(__GNUC__) && defined (__x86_64__)
236 __asm__ ( 236 __asm__ (
237 " movq %%rbx,%%rdi\n" 237 " pushq %%rbx\n"
238 " movl $0x80000000,%%eax # Query for extended functions \n" 238 " movl $0x80000000,%%eax # Query for extended functions \n"
239 " cpuid # Get extended function limit \n" 239 " cpuid # Get extended function limit \n"
240 " cmpl $0x80000001,%%eax \n" 240 " cmpl $0x80000001,%%eax \n"
241 " jl 1f # Nope, we dont have function 800000001h\n" 241 " jl 1f # Nope, we dont have function 800000001h\n"
242 " movl $0x80000001,%%eax # Setup extended function 800000001h\n" 242 " movl $0x80000001,%%eax # Setup extended function 800000001h\n"
243 " cpuid # and get the information \n" 243 " cpuid # and get the information \n"
244 " movl %%edx,%0 \n" 244 " movl %%edx,%0 \n"
245 "1: \n" 245 "1: \n"
246 " movq %%rdi,%%rbx\n" 246 " popq %%rbx\n"
247 : "=m" (features) 247 : "=m" (features)
248 : 248 :
249 : "%rax", "%rbx", "%rcx", "%rdx", "%rdi" 249 : "%rax", "%rcx", "%rdx"
250 ); 250 );
251 #elif (defined(_MSC_VER) && defined(_M_IX86)) || defined(__WATCOMC__) 251 #elif (defined(_MSC_VER) && defined(_M_IX86)) || defined(__WATCOMC__)
252 __asm { 252 __asm {
253 mov eax,80000000h ; Query for extended functions 253 mov eax,80000000h ; Query for extended functions
254 cpuid ; Get extended function limit 254 cpuid ; Get extended function limit
259 mov features,edx 259 mov features,edx
260 done: 260 done:
261 } 261 }
262 #elif defined(__sun) && ( defined(__i386) || defined(__amd64) ) 262 #elif defined(__sun) && ( defined(__i386) || defined(__amd64) )
263 __asm ( 263 __asm (
264 " movl %ebx,%edi\n" 264 " pushl %ebx\n"
265 " movl $0x80000000,%eax \n" 265 " movl $0x80000000,%eax \n"
266 " cpuid \n" 266 " cpuid \n"
267 " cmpl $0x80000001,%eax \n" 267 " cmpl $0x80000001,%eax \n"
268 " jl 1f \n" 268 " jl 1f \n"
269 " movl $0x80000001,%eax \n" 269 " movl $0x80000001,%eax \n"
272 " movl %edx,-8(%ebp) \n" 272 " movl %edx,-8(%ebp) \n"
273 #else 273 #else
274 " movl %edx,-8(%rbp) \n" 274 " movl %edx,-8(%rbp) \n"
275 #endif 275 #endif
276 "1: \n" 276 "1: \n"
277 " movl %edi,%ebx\n" 277 " popl %ebx\n"
278 ); 278 );
279 #endif 279 #endif
280 return features; 280 return features;
281 } 281 }
282 282