;
; 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_recon_b_armv6|
EXPORT |vp8_recon2b_armv6|
EXPORT |vp8_recon4b_armv6|
AREA |.text|, CODE, READONLY ; name this block of code
prd RN r0
dif RN r1
dst RN r2
stride RN r3
;void recon_b(unsigned char *pred_ptr, short *diff_ptr, unsigned char *dst_ptr, int stride)
; R0 char* pred_ptr
; R1 short * dif_ptr
; R2 char * dst_ptr
; R3 int stride
; Description:
; Loop through the block adding the Pred and Diff together. Clamp and then
; store back into the Dst.
; Restrictions :
; all buffers are expected to be 4 byte aligned coming in and
; going out.
;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
;
;
;
;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
|vp8_recon_b_armv6| PROC
stmdb sp!, {r4 - r9, lr}
;0, 1, 2, 3
ldr r4, [prd], #16 ; 3 | 2 | 1 | 0
ldr r6, [dif, #0] ; 1 | 0
ldr r7, [dif, #4] ; 3 | 2
pkhbt r8, r6, r7, lsl #16 ; 2 | 0
pkhtb r9, r7, r6, asr #16 ; 3 | 1
uxtab16 r8, r8, r4 ; 2 | 0 + 3 | 2 | 2 | 0
uxtab16 r9, r9, r4, ror #8 ; 3 | 1 + 0 | 3 | 2 | 1
usat16 r8, #8, r8
usat16 r9, #8, r9
add dif, dif, #32
orr r8, r8, r9, lsl #8
str r8, [dst], stride
;0, 1, 2, 3
ldr r4, [prd], #16 ; 3 | 2 | 1 | 0
;; ldr r6, [dif, #8] ; 1 | 0
;; ldr r7, [dif, #12] ; 3 | 2
ldr r6, [dif, #0] ; 1 | 0
ldr r7, [dif, #4] ; 3 | 2
pkhbt r8, r6, r7, lsl #16 ; 2 | 0
pkhtb r9, r7, r6, asr #16 ; 3 | 1
uxtab16 r8, r8, r4 ; 2 | 0 + 3 | 2 | 2 | 0
uxtab16 r9, r9, r4, ror #8 ; 3 | 1 + 0 | 3 | 2 | 1
usat16 r8, #8, r8
usat16 r9, #8, r9
add dif, dif, #32
orr r8, r8, r9, lsl #8
str r8, [dst], stride
;0, 1, 2, 3
ldr r4, [prd], #16 ; 3 | 2 | 1 | 0
;; ldr r6, [dif, #16] ; 1 | 0
;; ldr r7, [dif, #20] ; 3 | 2
ldr r6, [dif, #0] ; 1 | 0
ldr r7, [dif, #4] ; 3 | 2
pkhbt r8, r6, r7, lsl #16 ; 2 | 0
pkhtb r9, r7, r6, asr #16 ; 3 | 1
uxtab16 r8, r8, r4 ; 2 | 0 + 3 | 2 | 2 | 0
uxtab16 r9, r9, r4, ror #8 ; 3 | 1 + 0 | 3 | 2 | 1
usat16 r8, #8, r8
usat16 r9, #8, r9
add dif, dif, #32
orr r8, r8, r9, lsl #8
str r8, [dst], stride
;0, 1, 2, 3
ldr r4, [prd], #16 ; 3 | 2 | 1 | 0
;; ldr r6, [dif, #24] ; 1 | 0
;; ldr r7, [dif, #28] ; 3 | 2
ldr r6, [dif, #0] ; 1 | 0
ldr r7, [dif, #4] ; 3 | 2
pkhbt r8, r6, r7, lsl #16 ; 2 | 0
pkhtb r9, r7, r6, asr #16 ; 3 | 1
uxtab16 r8, r8, r4 ; 2 | 0 + 3 | 2 | 2 | 0
uxtab16 r9, r9, r4, ror #8 ; 3 | 1 + 0 | 3 | 2 | 1
usat16 r8, #8, r8
usat16 r9, #8, r9
orr r8, r8, r9, lsl #8
str r8, [dst], stride
ldmia sp!, {r4 - r9, pc}
ENDP ; |recon_b|
;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
;
;
;
;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
; R0 char *pred_ptr
; R1 short *dif_ptr
; R2 char *dst_ptr
; R3 int stride
|vp8_recon4b_armv6| PROC
stmdb sp!, {r4 - r9, lr}
mov lr, #4
recon4b_loop
;0, 1, 2, 3
ldr r4, [prd], #4 ; 3 | 2 | 1 | 0
ldr r6, [dif, #0] ; 1 | 0
ldr r7, [dif, #4] ; 3 | 2
pkhbt r8, r6, r7, lsl #16 ; 2 | 0
pkhtb r9, r7, r6, asr #16 ; 3 | 1
uxtab16 r8, r8, r4 ; 2 | 0 + 3 | 2 | 2 | 0
uxtab16 r9, r9, r4, ror #8 ; 3 | 1 + 0 | 3 | 2 | 1
usat16 r8, #8, r8
usat16 r9, #8, r9
orr r8, r8, r9, lsl #8
str r8, [dst]
;4, 5, 6, 7
ldr r4, [prd], #4
;; ldr r6, [dif, #32]
;; ldr r7, [dif, #36]
ldr r6, [dif, #8]
ldr r7, [dif, #12]
pkhbt r8, r6, r7, lsl #16
pkhtb r9, r7, r6, asr #16
uxtab16 r8, r8, r4
uxtab16 r9, r9, r4, ror #8
usat16 r8, #8, r8
usat16 r9, #8, r9
orr r8, r8, r9, lsl #8
str r8, [dst, #4]
;8, 9, 10, 11
ldr r4, [prd], #4
;; ldr r6, [dif, #64]
;; ldr r7, [dif, #68]
ldr r6, [dif, #16]
ldr r7, [dif, #20]
pkhbt r8, r6, r7, lsl #16
pkhtb r9, r7, r6, asr #16
uxtab16 r8, r8, r4
uxtab16 r9, r9, r4, ror #8
usat16 r8, #8, r8
usat16 r9, #8, r9
orr r8, r8, r9, lsl #8
str r8, [dst, #8]
;12, 13, 14, 15
ldr r4, [prd], #4
;; ldr r6, [dif, #96]
;; ldr r7, [dif, #100]
ldr r6, [dif, #24]
ldr r7, [dif, #28]
pkhbt r8, r6, r7, lsl #16
pkhtb r9, r7, r6, asr #16
uxtab16 r8, r8, r4
uxtab16 r9, r9, r4, ror #8
usat16 r8, #8, r8
usat16 r9, #8, r9
orr r8, r8, r9, lsl #8
str r8, [dst, #12]
add dst, dst, stride
;; add dif, dif, #8
add dif, dif, #32
subs lr, lr, #1
bne recon4b_loop
ldmia sp!, {r4 - r9, pc}
ENDP ; |Recon4B|
;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
;
;
;
;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
; R0 char *pred_ptr
; R1 short *dif_ptr
; R2 char *dst_ptr
; R3 int stride
|vp8_recon2b_armv6| PROC
stmdb sp!, {r4 - r9, lr}
mov lr, #4
recon2b_loop
;0, 1, 2, 3
ldr r4, [prd], #4
ldr r6, [dif, #0]
ldr r7, [dif, #4]
pkhbt r8, r6, r7, lsl #16
pkhtb r9, r7, r6, asr #16
uxtab16 r8, r8, r4
uxtab16 r9, r9, r4, ror #8
usat16 r8, #8, r8
usat16 r9, #8, r9
orr r8, r8, r9, lsl #8
str r8, [dst]
;4, 5, 6, 7
ldr r4, [prd], #4
;; ldr r6, [dif, #32]
;; ldr r7, [dif, #36]
ldr r6, [dif, #8]
ldr r7, [dif, #12]
pkhbt r8, r6, r7, lsl #16
pkhtb r9, r7, r6, asr #16
uxtab16 r8, r8, r4
uxtab16 r9, r9, r4, ror #8
usat16 r8, #8, r8
usat16 r9, #8, r9
orr r8, r8, r9, lsl #8
str r8, [dst, #4]
add dst, dst, stride
;; add dif, dif, #8
add dif, dif, #16
subs lr, lr, #1
bne recon2b_loop
ldmia sp!, {r4 - r9, pc}
ENDP ; |Recon2B|
END