ffmpeg | branch: master | Rémi Denis-Courmont <r...@remlab.net> | Fri Oct 27 21:26:14 2023 +0300| [300ee8b02d8361c88fe86c0950008ee6152b5616] | committer: Rémi Denis-Courmont
lavc/pixblockdsp: aligned R-V V 8-bit functions If the scan lines are aligned, we can load each row as a 64-bit value, thus avoiding segmentation. And then we can factor the conversion or subtraction. In principle, the same optimisation should be possible for high depth, but would require 128-bit elements, for which no FFmpeg CPU flag exists. > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=300ee8b02d8361c88fe86c0950008ee6152b5616 --- libavcodec/riscv/pixblockdsp_init.c | 11 +++++++++++ libavcodec/riscv/pixblockdsp_rvv.S | 21 +++++++++++++++++++++ 2 files changed, 32 insertions(+) diff --git a/libavcodec/riscv/pixblockdsp_init.c b/libavcodec/riscv/pixblockdsp_init.c index 8f24281217..7d259a032f 100644 --- a/libavcodec/riscv/pixblockdsp_init.c +++ b/libavcodec/riscv/pixblockdsp_init.c @@ -32,10 +32,14 @@ void ff_get_pixels_8_rvi(int16_t *block, const uint8_t *pixels, void ff_get_pixels_16_rvi(int16_t *block, const uint8_t *pixels, ptrdiff_t stride); +void ff_get_pixels_8_rvv(int16_t *block, const uint8_t *pixels, + ptrdiff_t stride); void ff_get_pixels_unaligned_8_rvv(int16_t *block, const uint8_t *pixels, ptrdiff_t stride); void ff_get_pixels_unaligned_16_rvv(int16_t *block, const uint8_t *pixels, ptrdiff_t stride); +void ff_diff_pixels_rvv(int16_t *block, const uint8_t *s1, + const uint8_t *s2, ptrdiff_t stride); void ff_diff_pixels_unaligned_rvv(int16_t *block, const uint8_t *s1, const uint8_t *s2, ptrdiff_t stride); @@ -64,6 +68,13 @@ av_cold void ff_pixblockdsp_init_riscv(PixblockDSPContext *c, c->diff_pixels = ff_diff_pixels_unaligned_rvv; c->diff_pixels_unaligned = ff_diff_pixels_unaligned_rvv; + + if (cpu_flags & AV_CPU_FLAG_RVV_I64) { + if (!high_bit_depth) + c->get_pixels = ff_get_pixels_8_rvv; + + c->diff_pixels = ff_diff_pixels_rvv; + } } #endif } diff --git a/libavcodec/riscv/pixblockdsp_rvv.S b/libavcodec/riscv/pixblockdsp_rvv.S index e3a2fcc6ef..80c7415acf 100644 --- a/libavcodec/riscv/pixblockdsp_rvv.S +++ b/libavcodec/riscv/pixblockdsp_rvv.S @@ -20,6 +20,16 @@ #include "libavutil/riscv/asm.S" +func ff_get_pixels_8_rvv, zve64x + vsetivli zero, 8, e8, mf2, ta, ma + li t0, 8 * 8 + vlse64.v v16, (a1), a2 + vsetvli zero, t0, e8, m4, ta, ma + vwcvtu.x.x.v v8, v16 + vse16.v v8, (a0) + ret +endfunc + func ff_get_pixels_unaligned_8_rvv, zve32x vsetivli zero, 8, e8, mf2, ta, ma vlsseg8e8.v v16, (a1), a2 @@ -42,6 +52,17 @@ func ff_get_pixels_unaligned_16_rvv, zve32x ret endfunc +func ff_diff_pixels_rvv, zve64x + vsetivli zero, 8, e8, mf2, ta, ma + li t0, 8 * 8 + vlse64.v v16, (a1), a3 + vlse64.v v24, (a2), a3 + vsetvli zero, t0, e8, m4, ta, ma + vwsubu.vv v8, v16, v24 + vse16.v v8, (a0) + ret +endfunc + func ff_diff_pixels_unaligned_rvv, zve32x vsetivli zero, 8, e8, mf2, ta, ma vlsseg8e8.v v16, (a1), a3 _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".
