ref: 9c9d6743d460da1bfb88af66bf43597ae6927af3
dir: /vp8/encoder/arm/neon/subtract_neon.asm/
;
; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
;
; Use of this source code is governed by a BSD-style license
; that can be found in the LICENSE file in the root of the source
; tree. An additional intellectual property rights grant can be found
; in the file PATENTS. All contributing project authors may
; be found in the AUTHORS file in the root of the source tree.
;
EXPORT |vp8_subtract_b_neon|
EXPORT |vp8_subtract_mby_neon|
EXPORT |vp8_subtract_mbuv_neon|
INCLUDE asm_enc_offsets.asm
ARM
REQUIRE8
PRESERVE8
AREA ||.text||, CODE, READONLY, ALIGN=2
;void vp8_subtract_b_neon(BLOCK *be, BLOCKD *bd, int pitch)
|vp8_subtract_b_neon| PROC
stmfd sp!, {r4-r7}
ldr r3, [r0, #vp8_block_base_src]
ldr r4, [r0, #vp8_block_src]
ldr r5, [r0, #vp8_block_src_diff]
ldr r3, [r3]
ldr r6, [r0, #vp8_block_src_stride]
add r3, r3, r4 ; src = *base_src + src
ldr r7, [r1, #vp8_blockd_predictor]
vld1.8 {d0}, [r3], r6 ;load src
vld1.8 {d1}, [r7], r2 ;load pred
vld1.8 {d2}, [r3], r6
vld1.8 {d3}, [r7], r2
vld1.8 {d4}, [r3], r6
vld1.8 {d5}, [r7], r2
vld1.8 {d6}, [r3], r6
vld1.8 {d7}, [r7], r2
vsubl.u8 q10, d0, d1
vsubl.u8 q11, d2, d3
vsubl.u8 q12, d4, d5
vsubl.u8 q13, d6, d7
mov r2, r2, lsl #1
vst1.16 {d20}, [r5], r2 ;store diff
vst1.16 {d22}, [r5], r2
vst1.16 {d24}, [r5], r2
vst1.16 {d26}, [r5], r2
ldmfd sp!, {r4-r7}
bx lr
ENDP
;==========================================
;void vp8_subtract_mby_neon(short *diff, unsigned char *src, unsigned char *pred, int stride)
|vp8_subtract_mby_neon| PROC
mov r12, #4
subtract_mby_loop
vld1.8 {q0}, [r1], r3 ;load src
vld1.8 {q1}, [r2]! ;load pred
vld1.8 {q2}, [r1], r3
vld1.8 {q3}, [r2]!
vld1.8 {q4}, [r1], r3
vld1.8 {q5}, [r2]!
vld1.8 {q6}, [r1], r3
vld1.8 {q7}, [r2]!
vsubl.u8 q8, d0, d2
vsubl.u8 q9, d1, d3
vsubl.u8 q10, d4, d6
vsubl.u8 q11, d5, d7
vsubl.u8 q12, d8, d10
vsubl.u8 q13, d9, d11
vsubl.u8 q14, d12, d14
vsubl.u8 q15, d13, d15
vst1.16 {q8}, [r0]! ;store diff
vst1.16 {q9}, [r0]!
vst1.16 {q10}, [r0]!
vst1.16 {q11}, [r0]!
vst1.16 {q12}, [r0]!
vst1.16 {q13}, [r0]!
vst1.16 {q14}, [r0]!
vst1.16 {q15}, [r0]!
subs r12, r12, #1
bne subtract_mby_loop
bx lr
ENDP
;=================================
;void vp8_subtract_mbuv_neon(short *diff, unsigned char *usrc, unsigned char *vsrc, unsigned char *pred, int stride)
|vp8_subtract_mbuv_neon| PROC
ldr r12, [sp]
;u
add r0, r0, #512 ; short *udiff = diff + 256;
add r3, r3, #256 ; unsigned char *upred = pred + 256;
vld1.8 {d0}, [r1], r12 ;load src
vld1.8 {d1}, [r3]! ;load pred
vld1.8 {d2}, [r1], r12
vld1.8 {d3}, [r3]!
vld1.8 {d4}, [r1], r12
vld1.8 {d5}, [r3]!
vld1.8 {d6}, [r1], r12
vld1.8 {d7}, [r3]!
vld1.8 {d8}, [r1], r12
vld1.8 {d9}, [r3]!
vld1.8 {d10}, [r1], r12
vld1.8 {d11}, [r3]!
vld1.8 {d12}, [r1], r12
vld1.8 {d13}, [r3]!
vld1.8 {d14}, [r1], r12
vld1.8 {d15}, [r3]!
vsubl.u8 q8, d0, d1
vsubl.u8 q9, d2, d3
vsubl.u8 q10, d4, d5
vsubl.u8 q11, d6, d7
vsubl.u8 q12, d8, d9
vsubl.u8 q13, d10, d11
vsubl.u8 q14, d12, d13
vsubl.u8 q15, d14, d15
vst1.16 {q8}, [r0]! ;store diff
vst1.16 {q9}, [r0]!
vst1.16 {q10}, [r0]!
vst1.16 {q11}, [r0]!
vst1.16 {q12}, [r0]!
vst1.16 {q13}, [r0]!
vst1.16 {q14}, [r0]!
vst1.16 {q15}, [r0]!
;v
vld1.8 {d0}, [r2], r12 ;load src
vld1.8 {d1}, [r3]! ;load pred
vld1.8 {d2}, [r2], r12
vld1.8 {d3}, [r3]!
vld1.8 {d4}, [r2], r12
vld1.8 {d5}, [r3]!
vld1.8 {d6}, [r2], r12
vld1.8 {d7}, [r3]!
vld1.8 {d8}, [r2], r12
vld1.8 {d9}, [r3]!
vld1.8 {d10}, [r2], r12
vld1.8 {d11}, [r3]!
vld1.8 {d12}, [r2], r12
vld1.8 {d13}, [r3]!
vld1.8 {d14}, [r2], r12
vld1.8 {d15}, [r3]!
vsubl.u8 q8, d0, d1
vsubl.u8 q9, d2, d3
vsubl.u8 q10, d4, d5
vsubl.u8 q11, d6, d7
vsubl.u8 q12, d8, d9
vsubl.u8 q13, d10, d11
vsubl.u8 q14, d12, d13
vsubl.u8 q15, d14, d15
vst1.16 {q8}, [r0]! ;store diff
vst1.16 {q9}, [r0]!
vst1.16 {q10}, [r0]!
vst1.16 {q11}, [r0]!
vst1.16 {q12}, [r0]!
vst1.16 {q13}, [r0]!
vst1.16 {q14}, [r0]!
vst1.16 {q15}, [r0]!
bx lr
ENDP
END