vp8/decoder/arm/armv5/dequantize_v5.asm

;
;  Copyright (c) 2010 The VP8 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_dequantize_b_armv5|

    AREA    |.text|, CODE, READONLY  ; name this block of code

q       RN  r0
dqc     RN  r1
cnt     RN  r2

;void dequantize_b_armv5(short *Q, short *DQC)
|vp8_dequantize_b_armv5| PROC
    stmdb   sp!, {r4, lr}
    ldr     r3, [q]
    ldr     r4, [dqc], #8

    mov     cnt, #4
dequant_loop
    smulbb  lr, r3, r4
    smultt  r12, r3, r4

    ldr     r3, [q, #4]
    ldr     r4, [dqc, #-4]

    strh    lr, [q], #2
    strh    r12, [q], #2

    smulbb  lr, r3, r4
    smultt  r12, r3, r4

    subs    cnt, cnt, #1
    ldrne   r3, [q, #4]
    ldrne   r4, [dqc], #8

    strh    lr, [q], #2
    strh    r12, [q], #2

    bne     dequant_loop

    ldmia   sp!, {r4, pc}
    ENDP    ;|vp8_dequantize_b_arm|

    END