From f2ef3892564e8a2fd76a9ae1b9d19058572f713b Mon Sep 17 00:00:00 2001
From: hkuang <hkuang@google.com>
Date: Thu, 9 Jan 2014 18:40:19 -0800
Subject: [PATCH] Add vp9_tm_predictor_4x4 neon implementation
Change-Id: I10c423bde7ea5a3bac9f14f35c73b6bc31c8f3e3
---
vp9/common/arm/neon/vp9_reconintra_neon.asm | 49 +++++++++++++++++++++
vp9/common/vp9_rtcd_defs.sh | 2 +-
2 files changed, 50 insertions(+), 1 deletion(-)
diff --git a/vp9/common/arm/neon/vp9_reconintra_neon.asm b/vp9/common/arm/neon/vp9_reconintra_neon.asm
index f106bc78e2..98619bb305 100644
--- a/vp9/common/arm/neon/vp9_reconintra_neon.asm
+++ b/vp9/common/arm/neon/vp9_reconintra_neon.asm
@@ -16,6 +16,7 @@
EXPORT |vp9_h_predictor_8x8_neon|
EXPORT |vp9_h_predictor_16x16_neon|
EXPORT |vp9_h_predictor_32x32_neon|
+ EXPORT |vp9_tm_predictor_4x4_neon|
ARM
REQUIRE8
PRESERVE8
@@ -283,4 +284,52 @@ loop_h
bx lr
ENDP ; |vp9_h_predictor_32x32_neon|
+;void vp9_tm_predictor_4x4_neon (uint8_t *dst, ptrdiff_t y_stride,
+; const uint8_t *above,
+; const uint8_t *left)
+; r0 uint8_t *dst
+; r1 ptrdiff_t y_stride
+; r2 const uint8_t *above
+; r3 const uint8_t *left
+
+|vp9_tm_predictor_4x4_neon| PROC
+ ; Load ytop_left = above[-1];
+ sub r12, r2, #1
+ ldrb r12, [r12]
+ vdup.u8 d0, r12
+
+ ; Load above 4 pixels
+ vld1.32 {d2[0]}, [r2]
+
+ ; Compute above - ytop_left
+ vsubl.u8 q3, d2, d0
+
+ ; Load left row by row and compute left + (above - ytop_left)
+ ; 1st row and 2nd row
+ ldrb r12, [r3], #1
+ ldrb r2, [r3], #1
+ vdup.u16 q1, r12
+ vdup.u16 q2, r2
+ vadd.s16 q1, q1, q3
+ vadd.s16 q2, q2, q3
+ vqshrun.s16 d0, q1, #0
+ vqshrun.s16 d1, q2, #0
+ vst1.32 {d0[0]}, [r0], r1
+ vst1.32 {d1[0]}, [r0], r1
+
+ ; 3rd row and 4th row
+ ldrb r12, [r3], #1
+ ldrb r2, [r3], #1
+ vdup.u16 q1, r12
+ vdup.u16 q2, r2
+ vadd.s16 q1, q1, q3
+ vadd.s16 q2, q2, q3
+ vqshrun.s16 d0, q1, #0
+ vqshrun.s16 d1, q2, #0
+ vst1.32 {d0[0]}, [r0], r1
+ vst1.32 {d1[0]}, [r0], r1
+
+ bx lr
+ ENDP ; |vp9_tm_predictor_4x4_neon|
+
END
diff --git a/vp9/common/vp9_rtcd_defs.sh b/vp9/common/vp9_rtcd_defs.sh
index cc571072fc..a32f98aa50 100644
--- a/vp9/common/vp9_rtcd_defs.sh
+++ b/vp9/common/vp9_rtcd_defs.sh
@@ -57,7 +57,7 @@ prototype void vp9_v_predictor_4x4 "uint8_t *dst, ptrdiff_t y_stride, const uint
specialize vp9_v_predictor_4x4 $sse_x86inc neon
prototype void vp9_tm_predictor_4x4 "uint8_t *dst, ptrdiff_t y_stride, const uint8_t *above, const uint8_t *left"
-specialize vp9_tm_predictor_4x4 $sse_x86inc dspr2
+specialize vp9_tm_predictor_4x4 $sse_x86inc neon dspr2
prototype void vp9_dc_predictor_4x4 "uint8_t *dst, ptrdiff_t y_stride, const uint8_t *above, const uint8_t *left"
specialize vp9_dc_predictor_4x4 $sse_x86inc dspr2
--
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