Re: [FFmpeg-devel] [PATCH v2] riscv: Tweak names of cpu flags, print flags in libavutil/tests/cpu

["Rémi Denis-Courmont" <remi@remlab.net>]

Le perjantaina 15. joulukuuta 2023, 22.52.51 EET Martin Storsjö a écrit :
> The names of the cpu flags, when parsed from a string with
> av_parse_cpu_caps, are parsed by the libavutil eval functions. These
> interpret dashes as subtractions. Therefore, these previous cpu flag
> names haven't been possible to set.
> 
> Use the official names for these extensions, as the previous ad-hoc
> names wasn't parseable.
> 
> libavutil/tests/cpu tests that the cpu flags can be set, and prints
> the detected flags.
> ---
>  libavutil/cpu.c       | 12 ++++++------
>  libavutil/tests/cpu.c | 10 ++++++++++
>  2 files changed, 16 insertions(+), 6 deletions(-)
> 
> diff --git a/libavutil/cpu.c b/libavutil/cpu.c
> index 1e0607d581..f04068acda 100644
> --- a/libavutil/cpu.c
> +++ b/libavutil/cpu.c
> @@ -186,12 +186,12 @@ int av_parse_cpu_caps(unsigned *flags, const char *s)
>          { "rvi",      NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RVI 
>     },    .unit = "flags" }, { "rvf",      NULL, 0, AV_OPT_TYPE_CONST, {
> .i64 = AV_CPU_FLAG_RVF      },    .unit = "flags" }, { "rvd",      NULL, 0,
> AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RVD      },    .unit = "flags" }, -
>        { "rvv-i32",  NULL, 0, AV_OPT_TYPE_CONST, { .i64 =
> AV_CPU_FLAG_RVV_I32 },     .unit = "flags" }, -        { "rvv-f32",  NULL,
> 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RVV_F32 },     .unit = "flags"
> }, -        { "rvv-i64",  NULL, 0, AV_OPT_TYPE_CONST, { .i64 =
> AV_CPU_FLAG_RVV_I64 },     .unit = "flags" }, -        { "rvv",      NULL,
> 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RVV_F64 },     .unit = "flags"
> }, -        { "rvb-addr",NULL, 0, AV_OPT_TYPE_CONST, { .i64 =
> AV_CPU_FLAG_RVB_ADDR },   .unit = "flags" }, -        { "rvb-basic",NULL,
> 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RVB_BASIC },   .unit = "flags"
> }, +        { "zve32x",   NULL, 0, AV_OPT_TYPE_CONST, { .i64 =
> AV_CPU_FLAG_RVV_I32  },    .unit = "flags" }, +        { "zve32f",   NULL,
> 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RVV_F32  },    .unit = "flags"
> }, +        { "zve64x",   NULL, 0, AV_OPT_TYPE_CONST, { .i64 =
> AV_CPU_FLAG_RVV_I64  },    .unit = "flags" },
> +        { "zve64f",   NULL,
> 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_RVV_F64  },    .unit = "flags"

That's Zve64d. Or V though strictly speaking V also implies a vector length of 
at least 128 bits, while Zve64d only implies 64 bits.

> }, +        { "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"
> }, #endif
>          { NULL },
>      };
> diff --git a/libavutil/tests/cpu.c b/libavutil/tests/cpu.c
> index 200f20388a..6b27bcdbad 100644
> --- a/libavutil/tests/cpu.c
> +++ b/libavutil/tests/cpu.c
> @@ -84,6 +84,16 @@ static const struct {
>  #elif ARCH_LOONGARCH
>      { AV_CPU_FLAG_LSX,       "lsx"        },
>      { AV_CPU_FLAG_LASX,      "lasx"       },
> +#elif ARCH_RISCV
> +    { AV_CPU_FLAG_RVI,       "rvi"        },
> +    { AV_CPU_FLAG_RVF,       "rvf"        },
> +    { AV_CPU_FLAG_RVD,       "rvd"        },
> +    { AV_CPU_FLAG_RVB_ADDR,  "zba"        },
> +    { AV_CPU_FLAG_RVB_BASIC, "zbb"        },
> +    { AV_CPU_FLAG_RVV_I32,   "zve32x"     },
> +    { AV_CPU_FLAG_RVV_F32,   "zve32f"     },
> +    { AV_CPU_FLAG_RVV_I64,   "zve64x"     },
> +    { AV_CPU_FLAG_RVV_F64,   "zve64f"     },
>  #endif
>      { 0 }
>  };


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