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commit f0a28cf9ce452241a5e8d4c5a3532ab28f1ebb5c Author: Andreas Rheinhardt <[email protected]> AuthorDate: Thu Mar 5 18:39:28 2026 +0100 Commit: Andreas Rheinhardt <[email protected]> CommitDate: Mon Mar 9 07:28:29 2026 +0100 avcodec/x86/pngdsp: Don't use mmx register in ff_add_bytes_l2_sse2() This change has no measurable impact on performance here; it is intended to avoid unpredictable behavior with floating point operation like the one that led to commit 57a29f2e7dd2374a1df27316c6cf7c0225e86758. Signed-off-by: Andreas Rheinhardt <[email protected]> --- libavcodec/x86/pngdsp.asm | 7 ++++--- tests/checkasm/png.c | 4 ++-- 2 files changed, 6 insertions(+), 5 deletions(-) diff --git a/libavcodec/x86/pngdsp.asm b/libavcodec/x86/pngdsp.asm index 8ff49565d3..5fa3780185 100644 --- a/libavcodec/x86/pngdsp.asm +++ b/libavcodec/x86/pngdsp.asm @@ -57,9 +57,10 @@ cglobal add_bytes_l2, 4, 6, 2, dst, src1, src2, wa, w, i and waq, ~7 jmp .end_l .loop_l: - movq mm0, [src1q+iq] - paddb mm0, [src2q+iq] - movq [dstq+iq ], mm0 + movq m0, [src2q+iq] + movq m1, [src1q+iq] + paddb m0, m1 + movq [dstq+iq ], m0 add iq, 8 .end_l: cmp iq, waq diff --git a/tests/checkasm/png.c b/tests/checkasm/png.c index 0807d3ab7b..0fe049cf9c 100644 --- a/tests/checkasm/png.c +++ b/tests/checkasm/png.c @@ -38,8 +38,8 @@ static void check_add_bytes_l2(const PNGDSPContext *c) LOCAL_ALIGNED_16(uint8_t, dst1, [BUF_SIZE]); LOCAL_ALIGNED_16(uint8_t, src, [2], [BUF_SIZE]); - declare_func_emms(AV_CPU_FLAG_MMX, void, uint8_t * dst, const uint8_t *src1, - const uint8_t *src2, int w); + declare_func(void, uint8_t * dst, const uint8_t *src1, + const uint8_t *src2, int w); randomize_buf(dst0, BUF_SIZE); memcpy(dst1, dst0, BUF_SIZE); _______________________________________________ ffmpeg-cvslog mailing list -- [email protected] To unsubscribe send an email to [email protected]
