[FFmpeg-devel] [PATCH 2/2] lavc/vp8dsp: restrict RVI optimisations

Rémi Denis-Courmont remi at remlab.net
Sat May 11 18:51:42 EEST 2024


They are actually awfully slow if the CPU does not support misaligned
accesses natively, so only use them if misaligned accesses are fast.
---
 libavcodec/riscv/vp8dsp_init.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/riscv/vp8dsp_init.c b/libavcodec/riscv/vp8dsp_init.c
index dc3e087f01..fe4fa5b867 100644
--- a/libavcodec/riscv/vp8dsp_init.c
+++ b/libavcodec/riscv/vp8dsp_init.c
@@ -45,7 +45,7 @@ av_cold void ff_vp78dsp_init_riscv(VP8DSPContext *c)
 {
 #if HAVE_RV
     int flags = av_get_cpu_flags();
-    if (flags & AV_CPU_FLAG_RVI) {
+    if (flags & AV_CPU_FLAG_RV_MISALIGNED) {
 #if __riscv_xlen >= 64
         c->put_vp8_epel_pixels_tab[0][0][0] = ff_put_vp8_pixels16_rvi;
         c->put_vp8_epel_pixels_tab[1][0][0] = ff_put_vp8_pixels8_rvi;
-- 
2.43.0



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