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lavu/riscv: CPU flag for fast misaligned accesses

This commit is contained in:
Rémi Denis-Courmont 2024-05-11 18:49:24 +03:00
parent 61ec7450ff
commit b410439263
5 changed files with 8 additions and 1 deletions
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1
libavutil/cpu.c
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@ -193,6 +193,7 @@ int av_parse_cpu_caps(unsigned *flags, const char *s)
{ "zba", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RVB_ADDR }, .unit = "flags" },
{ "zbb", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RVB_BASIC }, .unit = "flags" },
{ "zvbb", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RV_ZVBB }, .unit = "flags" },
{ "misaligned", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RV_MISALIGNED }, .unit = "flags" },
#endif
{ NULL },
};

1
libavutil/cpu.h
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@ -91,6 +91,7 @@
#define AV_CPU_FLAG_RVB_BASIC (1 << 7) ///< Basic bit-manipulations
#define AV_CPU_FLAG_RVB_ADDR (1 << 8) ///< Address bit-manipulations
#define AV_CPU_FLAG_RV_ZVBB (1 << 9) ///< Vector basic bit-manipulations
#define AV_CPU_FLAG_RV_MISALIGNED (1 <<10) ///< Fast misaligned accesses
/**
* Return the flags which specify extensions supported by the CPU.

3
libavutil/riscv/cpu.c
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@ -52,6 +52,7 @@ int ff_get_cpu_flags_riscv(void)
struct riscv_hwprobe pairs[] = {
{ RISCV_HWPROBE_KEY_BASE_BEHAVIOR, 0 },
{ RISCV_HWPROBE_KEY_IMA_EXT_0, 0 },
{ RISCV_HWPROBE_KEY_CPUPERF_0, 0 },
};
if (__riscv_hwprobe(pairs, FF_ARRAY_ELEMS(pairs), 0, NULL, 0) == 0) {
@ -76,6 +77,8 @@ int ff_get_cpu_flags_riscv(void)
if (pairs[1].value & RISCV_HWPROBE_EXT_ZVBB)
ret |= AV_CPU_FLAG_RV_ZVBB;
#endif
if (pairs[2].value & RISCV_HWPROBE_MISALIGNED_FAST)
ret |= AV_CPU_FLAG_RV_MISALIGNED;
} else
#endif
#if HAVE_GETAUXVAL

3
libavutil/tests/cpu.c
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@ -94,7 +94,8 @@ static const struct {
{ AV_CPU_FLAG_RVV_F32, "zve32f" },
{ AV_CPU_FLAG_RVV_I64, "zve64x" },
{ AV_CPU_FLAG_RVV_F64, "zve64d" },
{ AV_CPU_FLAG_RV_ZVBB, "zvbb" },
{ AV_CPU_FLAG_RV_ZVBB, "zvbb" },
{ AV_CPU_FLAG_RV_MISALIGNED, "misaligned" },
#endif
{ 0 }
};

1
tests/checkasm/checkasm.c
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@ -287,6 +287,7 @@ static const struct {
{ "RVVi64", "rvv_i64", AV_CPU_FLAG_RVV_I64 },
{ "RVVf64", "rvv_f64", AV_CPU_FLAG_RVV_F64 },
{ "RV_Zvbb", "rv_zvbb", AV_CPU_FLAG_RV_ZVBB },
{ "misaligned", "misaligned", AV_CPU_FLAG_RV_MISALIGNED },
#elif ARCH_MIPS
{ "MMI", "mmi", AV_CPU_FLAG_MMI },
{ "MSA", "msa", AV_CPU_FLAG_MSA },