ref: d5be4a17effb6a02731cf01fb79788a20e818775
dir: /vp8/common/arm/armv6/dequantize_v6.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_dequantize_b_loop_v6|
AREA |.text|, CODE, READONLY ; name this block of code
;-------------------------------
;void vp8_dequantize_b_loop_v6(short *Q, short *DQC, short *DQ);
; r0 short *Q,
; r1 short *DQC
; r2 short *DQ
|vp8_dequantize_b_loop_v6| PROC
stmdb sp!, {r4-r9, lr}
ldr r3, [r0] ;load Q
ldr r4, [r1] ;load DQC
ldr r5, [r0, #4]
ldr r6, [r1, #4]
mov r12, #2 ;loop counter
dequant_loop
smulbb r7, r3, r4 ;multiply
smultt r8, r3, r4
smulbb r9, r5, r6
smultt lr, r5, r6
ldr r3, [r0, #8]
ldr r4, [r1, #8]
ldr r5, [r0, #12]
ldr r6, [r1, #12]
strh r7, [r2], #2 ;store result
smulbb r7, r3, r4 ;multiply
strh r8, [r2], #2
smultt r8, r3, r4
strh r9, [r2], #2
smulbb r9, r5, r6
strh lr, [r2], #2
smultt lr, r5, r6
subs r12, r12, #1
add r0, r0, #16
add r1, r1, #16
ldrne r3, [r0]
strh r7, [r2], #2 ;store result
ldrne r4, [r1]
strh r8, [r2], #2
ldrne r5, [r0, #4]
strh r9, [r2], #2
ldrne r6, [r1, #4]
strh lr, [r2], #2
bne dequant_loop
ldmia sp!, {r4-r9, pc}
ENDP ;|vp8_dequantize_b_loop_v6|
END