ref: 86c36a504dd7834e934707b86aa81ceb6384154c
dir: /vp8/common/arm/armv6/dc_only_idct_add_v6.asm/
;
; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
;
; Use of this source code is governed by a BSD-style license and patent
; grant that can be found in the LICENSE file in the root of the source
; tree. All contributing project authors may be found in the AUTHORS
; file in the root of the source tree.
;
EXPORT |vp8_dc_only_idct_add_v6|
AREA |.text|, CODE, READONLY
;void vp8_dc_only_idct_add_c(short input_dc, unsigned char *pred_ptr,
; int pred_stride, unsigned char *dst_ptr,
; int dst_stride)
; r0 input_dc
; r1 pred_ptr
; r2 pred_stride
; r3 dst_ptr
; sp dst_stride
|vp8_dc_only_idct_add_v6| PROC
stmdb sp!, {r4 - r7}
add r0, r0, #4 ; input_dc += 4
ldr r12, c0x0000FFFF
ldr r4, [r1], r2
and r0, r12, r0, asr #3 ; input_dc >> 3 + mask
ldr r6, [r1], r2
orr r0, r0, r0, lsl #16 ; a1 | a1
ldr r12, [sp, #16] ; dst stride
uxtab16 r5, r0, r4 ; a1+2 | a1+0
uxtab16 r4, r0, r4, ror #8 ; a1+3 | a1+1
uxtab16 r7, r0, r6
uxtab16 r6, r0, r6, ror #8
usat16 r5, #8, r5
usat16 r4, #8, r4
usat16 r7, #8, r7
usat16 r6, #8, r6
orr r5, r5, r4, lsl #8
orr r7, r7, r6, lsl #8
ldr r4, [r1], r2
str r5, [r3], r12
ldr r6, [r1]
str r7, [r3], r12
uxtab16 r5, r0, r4
uxtab16 r4, r0, r4, ror #8
uxtab16 r7, r0, r6
uxtab16 r6, r0, r6, ror #8
usat16 r5, #8, r5
usat16 r4, #8, r4
usat16 r7, #8, r7
usat16 r6, #8, r6
orr r5, r5, r4, lsl #8
orr r7, r7, r6, lsl #8
str r5, [r3], r12
str r7, [r3]
ldmia sp!, {r4 - r7}
bx lr
ENDP ; |vp8_dc_only_idct_add_v6|
; Constant Pool
c0x0000FFFF DCD 0x0000FFFF
END