* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#include <stddef.h>
#include <stdint.h>
+#include <stdatomic.h>
#include "cpu.h"
#include "cpu_internal.h"
#include <unistd.h>
#endif
-static int cpuflags_mask = -1, checked;
+static atomic_int cpu_flags = ATOMIC_VAR_INIT(-1);
-int av_get_cpu_flags(void)
+static int get_cpu_flags(void)
{
- static int flags;
-
- if (checked)
- return flags;
-
if (ARCH_AARCH64)
- flags = ff_get_cpu_flags_aarch64();
+ return ff_get_cpu_flags_aarch64();
if (ARCH_ARM)
- flags = ff_get_cpu_flags_arm();
+ return ff_get_cpu_flags_arm();
if (ARCH_PPC)
- flags = ff_get_cpu_flags_ppc();
+ return ff_get_cpu_flags_ppc();
if (ARCH_X86)
- flags = ff_get_cpu_flags_x86();
-
- flags &= cpuflags_mask;
- checked = 1;
+ return ff_get_cpu_flags_x86();
+ return 0;
+}
+int av_get_cpu_flags(void)
+{
+ int flags = atomic_load_explicit(&cpu_flags, memory_order_relaxed);
+ if (flags == -1) {
+ flags = get_cpu_flags();
+ atomic_store_explicit(&cpu_flags, flags, memory_order_relaxed);
+ }
return flags;
}
void av_set_cpu_flags_mask(int mask)
{
- cpuflags_mask = mask;
- checked = 0;
+ atomic_store_explicit(&cpu_flags, get_cpu_flags() & mask,
+ memory_order_relaxed);
}
int av_parse_cpu_flags(const char *s)
#define CPUFLAG_SSE4 (AV_CPU_FLAG_SSE4 | CPUFLAG_SSSE3)
#define CPUFLAG_SSE42 (AV_CPU_FLAG_SSE42 | CPUFLAG_SSE4)
#define CPUFLAG_AVX (AV_CPU_FLAG_AVX | CPUFLAG_SSE42)
+#define CPUFLAG_AVXSLOW (AV_CPU_FLAG_AVXSLOW | CPUFLAG_AVX)
#define CPUFLAG_XOP (AV_CPU_FLAG_XOP | CPUFLAG_AVX)
+#define CPUFLAG_FMA3 (AV_CPU_FLAG_FMA3 | CPUFLAG_AVX)
#define CPUFLAG_FMA4 (AV_CPU_FLAG_FMA4 | CPUFLAG_AVX)
#define CPUFLAG_AVX2 (AV_CPU_FLAG_AVX2 | CPUFLAG_AVX)
+#define CPUFLAG_BMI2 (AV_CPU_FLAG_BMI2 | AV_CPU_FLAG_BMI1)
static const AVOption cpuflags_opts[] = {
{ "flags" , NULL, 0, AV_OPT_TYPE_FLAGS, { .i64 = 0 }, INT64_MIN, INT64_MAX, .unit = "flags" },
#if ARCH_PPC
{ "sse4.1" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE4 }, .unit = "flags" },
{ "sse4.2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE42 }, .unit = "flags" },
{ "avx" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_AVX }, .unit = "flags" },
+ { "avxslow" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_AVXSLOW }, .unit = "flags" },
{ "xop" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_XOP }, .unit = "flags" },
+ { "fma3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_FMA3 }, .unit = "flags" },
{ "fma4" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_FMA4 }, .unit = "flags" },
{ "avx2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_AVX2 }, .unit = "flags" },
+ { "bmi1" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_BMI1 }, .unit = "flags" },
+ { "bmi2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_BMI2 }, .unit = "flags" },
{ "3dnow" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_3DNOW }, .unit = "flags" },
{ "3dnowext", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_3DNOWEXT }, .unit = "flags" },
{ "cmov", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_CMOV }, .unit = "flags" },
{ "armv6", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV6 }, .unit = "flags" },
{ "armv6t2", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV6T2 }, .unit = "flags" },
{ "vfp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP }, .unit = "flags" },
+ { "vfp_vm", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP_VM }, .unit = "flags" },
{ "vfpv3", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFPV3 }, .unit = "flags" },
{ "neon", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_NEON }, .unit = "flags" },
#elif ARCH_AARCH64
+ { "armv8", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARMV8 }, .unit = "flags" },
{ "neon", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_NEON }, .unit = "flags" },
{ "vfp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP }, .unit = "flags" },
#endif
return nb_cpus;
}
-#ifdef TEST
-
-#include <stdio.h>
-
-static const struct {
- int flag;
- const char *name;
-} cpu_flag_tab[] = {
-#if ARCH_AARCH64
- { AV_CPU_FLAG_NEON, "neon" },
- { AV_CPU_FLAG_VFP, "vfp" },
-#elif ARCH_ARM
- { AV_CPU_FLAG_ARMV5TE, "armv5te" },
- { AV_CPU_FLAG_ARMV6, "armv6" },
- { AV_CPU_FLAG_ARMV6T2, "armv6t2" },
- { AV_CPU_FLAG_VFP, "vfp" },
- { AV_CPU_FLAG_VFPV3, "vfpv3" },
- { AV_CPU_FLAG_NEON, "neon" },
-#elif ARCH_PPC
- { AV_CPU_FLAG_ALTIVEC, "altivec" },
-#elif ARCH_X86
- { AV_CPU_FLAG_MMX, "mmx" },
- { AV_CPU_FLAG_MMXEXT, "mmxext" },
- { AV_CPU_FLAG_SSE, "sse" },
- { AV_CPU_FLAG_SSE2, "sse2" },
- { AV_CPU_FLAG_SSE2SLOW, "sse2(slow)" },
- { AV_CPU_FLAG_SSE3, "sse3" },
- { AV_CPU_FLAG_SSE3SLOW, "sse3(slow)" },
- { AV_CPU_FLAG_SSSE3, "ssse3" },
- { AV_CPU_FLAG_ATOM, "atom" },
- { AV_CPU_FLAG_SSE4, "sse4.1" },
- { AV_CPU_FLAG_SSE42, "sse4.2" },
- { AV_CPU_FLAG_AVX, "avx" },
- { AV_CPU_FLAG_XOP, "xop" },
- { AV_CPU_FLAG_FMA4, "fma4" },
- { AV_CPU_FLAG_3DNOW, "3dnow" },
- { AV_CPU_FLAG_3DNOWEXT, "3dnowext" },
- { AV_CPU_FLAG_CMOV, "cmov" },
- { AV_CPU_FLAG_AVX2, "avx2" },
-#endif
- { 0 }
-};
-
-int main(void)
+size_t av_cpu_max_align(void)
{
- int cpu_flags = av_get_cpu_flags();
- int i;
+ int flags = av_get_cpu_flags();
- printf("cpu_flags = 0x%08X\n", cpu_flags);
- printf("cpu_flags =");
- for (i = 0; cpu_flag_tab[i].flag; i++)
- if (cpu_flags & cpu_flag_tab[i].flag)
- printf(" %s", cpu_flag_tab[i].name);
- printf("\n");
+ if (flags & AV_CPU_FLAG_AVX)
+ return 32;
+ if (flags & (AV_CPU_FLAG_ALTIVEC | AV_CPU_FLAG_SSE | AV_CPU_FLAG_NEON))
+ return 16;
- return 0;
+ return 8;
}
-
-#endif
projects / ffmpeg / blobdiff