30-50% faster than the C implementation, 0.5% overall speedup on
bourne.rmvb.
---
libavcodec/arm/rv34dsp_init_neon.c | 9 +++++++--
libavcodec/arm/rv34dsp_neon.S | 29 +++++++++++++++++++++++++++++
2 files changed, 36 insertions(+), 2 deletions(-)
diff --git a/libavcodec/arm/rv34dsp_init_neon.c
b/libavcodec/arm/rv34dsp_init_neon.c
index 9a09fde..16bda46 100644
--- a/libavcodec/arm/rv34dsp_init_neon.c
+++ b/libavcodec/arm/rv34dsp_init_neon.c
@@ -26,8 +26,13 @@
void ff_rv34_inv_transform_neon(DCTELEM *block);
void ff_rv34_inv_transform_noround_neon(DCTELEM *block);
+void ff_rv34_inv_transform_dc_neon(DCTELEM *block);
+void ff_rv34_inv_transform_noround_dc_neon(DCTELEM *block);
+
void ff_rv34dsp_init_neon(RV34DSPContext *c, DSPContext* dsp)
{
- c->rv34_inv_transform_tab[0] = ff_rv34_inv_transform_neon;
- c->rv34_inv_transform_tab[1] = ff_rv34_inv_transform_noround_neon;
+ c->rv34_inv_transform_tab[0] = ff_rv34_inv_transform_neon;
+ c->rv34_inv_transform_tab[1] = ff_rv34_inv_transform_noround_neon;
+ c->rv34_inv_transform_dc_tab[0] = ff_rv34_inv_transform_dc_neon;
+ c->rv34_inv_transform_dc_tab[1] = ff_rv34_inv_transform_noround_dc_neon;
}
diff --git a/libavcodec/arm/rv34dsp_neon.S b/libavcodec/arm/rv34dsp_neon.S
index f700f5c..e776af0 100644
--- a/libavcodec/arm/rv34dsp_neon.S
+++ b/libavcodec/arm/rv34dsp_neon.S
@@ -107,3 +107,32 @@ function ff_rv34_inv_transform_noround_neon, export=1
vst4.16 {d0[3], d1[3], d2[3], d3[3]}, [r2,:64], r1
bx lr
endfunc
+
+/* void rv34_inv_transform_dc_c(DCTELEM *block) */
+function ff_rv34_inv_transform_dc_neon, export=1
+ vld1.16 d28[], [r0:16] @ block[0]
+ vmov.i16 d4, #169
+ mov r1, #16
+ vmull.s16 q3, d28, d4
+ vrshrn.s32 d0, q3, #10
+ vst1.16 {d0}, [r0:64], r1
+ vst1.16 {d0}, [r0:64], r1
+ vst1.16 {d0}, [r0:64], r1
+ vst1.16 {d0}, [r0:64], r1
+ bx lr
+endfunc
+
+/* void rv34_inv_transform_dc_noround_c(DCTELEM *block) */
+function ff_rv34_inv_transform_noround_dc_neon, export=1
+ vld1.16 d28[], [r0:16] @ block[0]
+ vmov.i16 d4, #251
+ vorr.s16 d4, #256 @ 13^2 * 3
+ mov r1, #16
+ vmull.s16 q3, d28, d4
+ vshrn.s32 d0, q3, #11
+ vst1.64 {d0}, [r0:64], r1
+ vst1.64 {d0}, [r0:64], r1
+ vst1.64 {d0}, [r0:64], r1
+ vst1.64 {d0}, [r0:64], r1
+ bx lr
+endfunc
--
1.7.8.3
_______________________________________________
libav-devel mailing list
[email protected]
https://lists.libav.org/mailman/listinfo/libav-devel
