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@/*
@ ** Copyright 2003-2010, VisualOn, Inc.
@ **
@ ** Licensed under the Apache License, Version 2.0 (the "License");
@ ** you may not use this file except in compliance with the License.
@ ** You may obtain a copy of the License at
@ **
@ ** http://www.apache.org/licenses/LICENSE-2.0
@ **
@ ** Unless required by applicable law or agreed to in writing, software
@ ** distributed under the License is distributed on an "AS IS" BASIS,
@ ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@ ** See the License for the specific language governing permissions and
@ ** limitations under the License.
@ */
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ File: PrePostMDCT_v5.s
@
@ Content: premdct and postmdct function armv5 assemble
@
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
.section .text
.global PreMDCT
PreMDCT:
stmdb sp!, {r4 - r11, lr}
add r9, r0, r1, lsl #2
sub r3, r9, #8
movs r1, r1, asr #2
beq PreMDCT_END
PreMDCT_LOOP:
ldr r8, [r2], #4
ldr r9, [r2], #4
ldrd r4, [r0]
ldrd r6, [r3]
smull r14, r11, r4, r8 @ MULHIGH(tr1, cosa)
smull r10, r12, r7, r8 @ MULHIGH(ti1, cosa)
smull r14, r8, r7, r9 @ MULHIGH(ti1, sina)
smull r7, r10, r4, r9 @ MULHIGH(tr1, sina)
add r11, r11, r8 @ MULHIGH(cosa, tr1) + MULHIGH(sina, ti1)@
sub r7, r12, r10 @ MULHIGH(ti1, cosa) - MULHIGH(tr1, sina)
ldr r8, [r2], #4
ldr r9, [r2], #4
smull r14, r4, r6, r8 @ MULHIGH(tr2, cosa)
smull r10, r12, r5, r8 @ MULHIGH(ti2, cosa)
smull r14, r8, r5, r9 @ MULHIGH(ti2, sina)
smull r5, r10, r6, r9 @ MULHIGH(tr2, sina)
add r8, r8, r4
sub r9, r12, r10
mov r6, r11
strd r6, [r0]
strd r8, [r3]
subs r1, r1, #1
sub r3, r3, #8
add r0, r0, #8
bne PreMDCT_LOOP
PreMDCT_END:
ldmia sp!, {r4 - r11, pc}
@ENDP @ |PreMDCT|
.section .text
.global PostMDCT
PostMDCT:
stmdb sp!, {r4 - r11, lr}
add r9, r0, r1, lsl #2
sub r3, r9, #8
movs r1, r1, asr #2
beq PostMDCT_END
PostMDCT_LOOP:
ldr r8, [r2], #4
ldr r9, [r2], #4
ldrd r4, [r0]
ldrd r6, [r3]
smull r14, r11, r4, r8 @ MULHIGH(tr1, cosa)
smull r10, r12, r5, r8 @ MULHIGH(ti1, cosa)
smull r14, r8, r5, r9 @ MULHIGH(ti1, sina)
smull r5, r10, r4, r9 @ MULHIGH(tr1, sina)
add r4, r11, r8 @ MULHIGH(cosa, tr1) + MULHIGH(sina, ti1)@
sub r11, r10, r12 @ MULHIGH(ti1, cosa) - MULHIGH(tr1, sina)@
ldr r8, [r2], #4 @
ldr r9, [r2], #4
smull r14, r5, r6, r8 @ MULHIGH(tr2, cosa)
smull r10, r12, r7, r8 @ MULHIGH(ti2, cosa)
smull r14, r8, r7, r9 @ MULHIGH(ti2, sina)
smull r7, r10, r6, r9 @ MULHIGH(tr2, sina)
add r6, r8, r5 @ MULHIGH(cosb, tr2) + MULHIGH(sinb, ti2)@
sub r5, r10, r12 @ MULHIGH(sinb, tr2) - MULHIGH(cosb, ti2)@
mov r7, r11
strd r4, [r0]
strd r6, [r3]
subs r1, r1, #1
sub r3, r3, #8
add r0, r0, #8
bne PostMDCT_LOOP
PostMDCT_END:
ldmia sp!, {r4 - r11, pc}
@ENDP @ |PostMDCT|
.end
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