On Wed, May 20, 2015 at 06:16:48PM +0800, 周晓勇 wrote:
> From d0ad6c2fbb57fb16e5507149a7378022329820f8 Mon Sep 17 00:00:00 2001
> From: ZhouXiaoyong <zhouxiaoy...@loongson.cn>
> Date: Tue, 19 May 2015 15:43:09 +0800
> Subject: [PATCH 2/3] avcodec/mips: loongson fix bugs in mathops optimization
>
>
> The mathops bugs impact passing fate test.
>
>
> Signed-off-by: ZhouXiaoyong <zhouxiaoy...@loongson.cn>
> ---
> libavcodec/mips/mathops.h | 41 +++++++----------------------------------
> 1 file changed, 7 insertions(+), 34 deletions(-)
>
>
> diff --git a/libavcodec/mips/mathops.h b/libavcodec/mips/mathops.h
> index cdc7705..d6b0706 100644
> --- a/libavcodec/mips/mathops.h
> +++ b/libavcodec/mips/mathops.h
> @@ -43,19 +43,6 @@ static inline av_const int MULH(int a, int b)
> return c;
> }
>
> -#define UMULH UMULH
> -static inline av_const unsigned UMULH(unsigned a, unsigned b)
> -{
> - unsigned c;
> - __asm__ ("dmultu %1, %2 \n\t"
> - "mflo %0 \n\t"
> - "dsrl %0, %0, 32 \n\t"
> - : "=r"(c)
> - : "r"(a),"r"(b)
> - : "hi", "lo");
> - return c;
> -}
> -
> #define mid_pred mid_pred
> static inline av_const int mid_pred(int a, int b, int c)
> {
> @@ -77,40 +64,26 @@ static inline av_const int mid_pred(int a, int b, int c)
> static inline av_const unsigned int ff_sqrt(unsigned int a)
> {
> unsigned int b;
> -
> - __asm__ ("ctc1 %1, $f0 \n\t"
> - "sqrt.s $f2, $f0 \n\t"
> - "cvt.w.s $f0, $f2 \n\t"
> - "cfc1 %0, $f0 \n\t"
> + __asm__ ("sqrt.s $f0, %1 \n\t"
> + "trunc.w.s $f0, $f0 \n\t"
> + "mfc1 %0, $f0 \n\t"
> : "=r"(b)
> - : "r"(a));
> + : "f"((float)a));
> return b;
> }fails fate-mathops [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB DNS cache poisoning attacks, popular search engine, Google internet authority dont be evil, please
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