From 4722a03c75d17d88312b91cd1006776844237349 Mon Sep 17 00:00:00 2001
From: Mans Rullgard <mans@mansr.com>
Date: Mon, 12 Dec 2011 23:22:04 +0000
Subject: [PATCH] rv34: NEON optimised 4x4 dequant
Signed-off-by: Mans Rullgard <mans@mansr.com>
---
libavcodec/arm/rv34dsp_init_neon.c | 3 +++
libavcodec/arm/rv34dsp_neon.S | 24 ++++++++++++++++++++++++
2 files changed, 27 insertions(+)
diff --git a/libavcodec/arm/rv34dsp_init_neon.c b/libavcodec/arm/rv34dsp_init_neon.c
index 9a09fde7a92..acf2a7dcd30 100644
--- a/libavcodec/arm/rv34dsp_init_neon.c
+++ b/libavcodec/arm/rv34dsp_init_neon.c
@@ -25,9 +25,12 @@
void ff_rv34_inv_transform_neon(DCTELEM *block);
void ff_rv34_inv_transform_noround_neon(DCTELEM *block);
+void ff_rv34_dequant4x4_neon(DCTELEM *block, int Qdc, int Q);
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_dequant4x4 = ff_rv34_dequant4x4_neon;
}
diff --git a/libavcodec/arm/rv34dsp_neon.S b/libavcodec/arm/rv34dsp_neon.S
index f700f5c3218..423b537fb95 100644
--- a/libavcodec/arm/rv34dsp_neon.S
+++ b/libavcodec/arm/rv34dsp_neon.S
@@ -107,3 +107,27 @@ 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
+
+function ff_rv34_dequant4x4_neon, export=1
+ mov r3, r0
+ mov r12, #16
+ vdup.16 q0, r2
+ vmov.16 d0[0], r1
+ vld1.16 {d2}, [r0,:64], r12
+ vld1.16 {d4}, [r0,:64], r12
+ vld1.16 {d6}, [r0,:64], r12
+ vld1.16 {d16}, [r0,:64], r12
+ vmull.s16 q1, d2, d0
+ vmull.s16 q2, d4, d1
+ vmull.s16 q3, d6, d1
+ vmull.s16 q8, d16, d1
+ vqrshrn.s32 d2, q1, #4
+ vqrshrn.s32 d4, q2, #4
+ vqrshrn.s32 d6, q3, #4
+ vqrshrn.s32 d16, q8, #4
+ vst1.16 {d2}, [r3,:64], r12
+ vst1.16 {d4}, [r3,:64], r12
+ vst1.16 {d6}, [r3,:64], r12
+ vst1.16 {d16}, [r3,:64], r12
+ bx lr
+endfunc
--
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