libavutil/cpu: Add AV_CPU_FLAG_SLOW_GATHER.

This flag is set on Haswell and earlier and all AMD cpus.

Alan Kelly committed 4 years ago

Commit ffbab991 parent 14b68054 files · +20 −3Browse files

Unified · Split

4 files

@@ -14,6 +14,9 @@ libavutil: 2021-04-27 · 13 unmodified lines
14	14
15	15	API changes, most recent first:
16	16
	17	+2021-12-21 - xxxxxxxxxx - lavu 57.12.100 - cpu.h
	18	+ Add AV_CPU_FLAG_SLOW_GATHER.
	19	+
17	20	2021-12-20 - xxxxxxxxxx - lavu 57.11.101 - display.h
18	21	Modified the documentation of av_display_rotation_set()
19	22	to match its longstanding actual behaviour of treating

@@ -54,6 +54,7 @@ · 53 unmodified lines
54	54	#define AV_CPU_FLAG_BMI1 0x20000 ///< Bit Manipulation Instruction Set 1
55	55	#define AV_CPU_FLAG_BMI2 0x40000 ///< Bit Manipulation Instruction Set 2
56	56	#define AV_CPU_FLAG_AVX512 0x100000 ///< AVX-512 functions: requires OS support even if YMM/ZMM registers aren't used
	57	+#define AV_CPU_FLAG_SLOW_GATHER 0x2000000 ///< CPU has slow gathers.
57	58
58	59	#define AV_CPU_FLAG_ALTIVEC 0x0001 ///< standard
59	60	#define AV_CPU_FLAG_VSX 0x0002 ///< ISA 2.06

@@ -79,8 +79,8 @@ · 78 unmodified lines
79	79	*/
80	80
81	81	#define LIBAVUTIL_VERSION_MAJOR 57
82		−#define LIBAVUTIL_VERSION_MINOR 11
83		−#define LIBAVUTIL_VERSION_MICRO 101
	82	+#define LIBAVUTIL_VERSION_MINOR 12
	83	+#define LIBAVUTIL_VERSION_MICRO 100
84	84
85	85	#define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
86	86	LIBAVUTIL_VERSION_MINOR, \

@@ -146,8 +146,21 @@ int ff_get_cpu_flags_x86(void) · 145 unmodified lines
146	146	if (max_std_level >= 7) {
147	147	cpuid(7, eax, ebx, ecx, edx);
148	148	#if HAVE_AVX2
149		− if ((rval & AV_CPU_FLAG_AVX) && (ebx & 0x00000020))
	149	+ if ((rval & AV_CPU_FLAG_AVX) && (ebx & 0x00000020)) {
150	150	rval \|= AV_CPU_FLAG_AVX2;
	151	+ cpuid(1, eax, ebx, ecx, std_caps);
	152	+ family = ((eax >> 8) & 0xf) + ((eax >> 20) & 0xff);
	153	+ model = ((eax >> 4) & 0xf) + ((eax >> 12) & 0xf0);
	154	+ /* Haswell has slow gather */
	155	+ if (!strncmp(vendor.c, "GenuineIntel", 12))
	156	+ if (family == 6 && model < 70)
	157	+ rval \|= AV_CPU_FLAG_SLOW_GATHER;
	158	+ /* Zen 3 and earlier have slow gather */
	159	+ if (!strncmp(vendor.c, "AuthenticAMD", 12))
	160	+ if (family <= 0x19)
	161	+ rval \|= AV_CPU_FLAG_SLOW_GATHER;
	162	+ }
	163	+
151	164	#if HAVE_AVX512 /* F, CD, BW, DQ, VL */
152	165	if ((xcr0_lo & 0xe0) == 0xe0) { /* OPMASK/ZMM state */
153	166	if ((rval & AV_CPU_FLAG_AVX2) && (ebx & 0xd0030000) == 0xd0030000)

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