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aarch64: Add CPU feature flags for SVE and SVE2

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Add code for detecting the feature on Linux and Windows.

Signed-off-by: Martin Storsjö <martin@martin.st>
Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Martin Storsjö 2023-10-12 23:31:33 +03:00 committed by Paul B Mahol
parent 375992c573
commit eadd7fbb05
6 changed files with 30 additions and 0 deletions
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20
libavutil/aarch64/cpu.c
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@ -25,6 +25,8 @@
#include <sys/auxv.h>
#define HWCAP_AARCH64_ASIMDDP (1 << 20)
#define HWCAP_AARCH64_SVE (1 << 22)
#define HWCAP2_AARCH64_SVE2 (1 << 1)
#define HWCAP2_AARCH64_I8MM (1 << 13)
static int detect_flags(void)
@ -36,6 +38,10 @@ static int detect_flags(void)
if (hwcap & HWCAP_AARCH64_ASIMDDP)
flags |= AV_CPU_FLAG_DOTPROD;
if (hwcap & HWCAP_AARCH64_SVE)
flags |= AV_CPU_FLAG_SVE;
if (hwcap2 & HWCAP2_AARCH64_SVE2)
flags |= AV_CPU_FLAG_SVE2;
if (hwcap2 & HWCAP2_AARCH64_I8MM)
flags |= AV_CPU_FLAG_I8MM;
@ -119,6 +125,14 @@ static int detect_flags(void)
* regular I8MM is available. */
if (IsProcessorFeaturePresent(PF_ARM_SVE_I8MM_INSTRUCTIONS_AVAILABLE))
flags |= AV_CPU_FLAG_I8MM;
#endif
#ifdef PF_ARM_SVE_INSTRUCTIONS_AVAILABLE
if (IsProcessorFeaturePresent(PF_ARM_SVE_INSTRUCTIONS_AVAILABLE))
flags |= AV_CPU_FLAG_SVE;
#endif
#ifdef PF_ARM_SVE2_INSTRUCTIONS_AVAILABLE
if (IsProcessorFeaturePresent(PF_ARM_SVE2_INSTRUCTIONS_AVAILABLE))
flags |= AV_CPU_FLAG_SVE2;
#endif
return flags;
}
@ -142,6 +156,12 @@ int ff_get_cpu_flags_aarch64(void)
#ifdef __ARM_FEATURE_MATMUL_INT8
flags |= AV_CPU_FLAG_I8MM;
#endif
#ifdef __ARM_FEATURE_SVE
flags |= AV_CPU_FLAG_SVE;
#endif
#ifdef __ARM_FEATURE_SVE2
flags |= AV_CPU_FLAG_SVE2;
#endif
flags |= detect_flags();

2
libavutil/aarch64/cpu.h
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@ -27,5 +27,7 @@
#define have_vfp(flags) CPUEXT(flags, VFP)
#define have_dotprod(flags) CPUEXT(flags, DOTPROD)
#define have_i8mm(flags) CPUEXT(flags, I8MM)
#define have_sve(flags) CPUEXT(flags, SVE)
#define have_sve2(flags) CPUEXT(flags, SVE2)
#endif /* AVUTIL_AARCH64_CPU_H */

2
libavutil/cpu.c
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@ -180,6 +180,8 @@ int av_parse_cpu_caps(unsigned *flags, const char *s)
{ "vfp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP }, .unit = "flags" },
{ "dotprod", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_DOTPROD }, .unit = "flags" },
{ "i8mm", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_I8MM }, .unit = "flags" },
{ "sve", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SVE }, .unit = "flags" },
{ "sve2", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SVE2 }, .unit = "flags" },
#elif ARCH_MIPS
{ "mmi", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMI }, .unit = "flags" },
{ "msa", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MSA }, .unit = "flags" },

2
libavutil/cpu.h
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@ -72,6 +72,8 @@
#define AV_CPU_FLAG_VFP_VM (1 << 7) ///< VFPv2 vector mode, deprecated in ARMv7-A and unavailable in various CPUs implementations
#define AV_CPU_FLAG_DOTPROD (1 << 8)
#define AV_CPU_FLAG_I8MM (1 << 9)
#define AV_CPU_FLAG_SVE (1 <<10)
#define AV_CPU_FLAG_SVE2 (1 <<11)
#define AV_CPU_FLAG_SETEND (1 <<16)
#define AV_CPU_FLAG_MMI (1 << 0)

2
libavutil/tests/cpu.c
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@ -40,6 +40,8 @@ static const struct {
{ AV_CPU_FLAG_VFP, "vfp" },
{ AV_CPU_FLAG_DOTPROD, "dotprod" },
{ AV_CPU_FLAG_I8MM, "i8mm" },
{ AV_CPU_FLAG_SVE, "sve" },
{ AV_CPU_FLAG_SVE2, "sve2" },
#elif ARCH_ARM
{ AV_CPU_FLAG_ARMV5TE, "armv5te" },
{ AV_CPU_FLAG_ARMV6, "armv6" },

2
tests/checkasm/checkasm.c
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@ -305,6 +305,8 @@ static const struct {
{ "NEON", "neon", AV_CPU_FLAG_NEON },
{ "DOTPROD", "dotprod", AV_CPU_FLAG_DOTPROD },
{ "I8MM", "i8mm", AV_CPU_FLAG_I8MM },
{ "SVE", "sve", AV_CPU_FLAG_SVE },
{ "SVE2", "sve2", AV_CPU_FLAG_SVE2 },
#elif ARCH_ARM
{ "ARMV5TE", "armv5te", AV_CPU_FLAG_ARMV5TE },
{ "ARMV6", "armv6", AV_CPU_FLAG_ARMV6 },