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|
; Copyright (C) 2009 The Android Open Source Project
;
; 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.
;-------------------------------------------------------------------------------
;--
;-- Abstract : ARMv6 optimized version of h264bsdInterpolateVerQuarter function
;--
;-------------------------------------------------------------------------------
IF :DEF: H264DEC_WINASM
;// We dont use REQUIRE8 and PRESERVE8 for winasm
ELSE
REQUIRE8
PRESERVE8
ENDIF
AREA |.text|, CODE
;// h264bsdInterpolateVerQuarter register allocation
ref RN 0
mb RN 1
buff RN 1
count RN 2
x0 RN 2
res RN 3
y0 RN 3
tmp1 RN 4
tmp2 RN 5
height RN 5
tmp3 RN 6
partW RN 6
tmp4 RN 7
partH RN 7
tmp5 RN 8
tmp6 RN 9
tmpa RN 10
tmpb RN 11
width RN 12
plus16 RN 14
;// function exports and imports
IMPORT h264bsdFillBlock
EXPORT h264bsdInterpolateVerQuarter
;// Approach to vertical interpolation
;//
;// Interpolation is done by using 32-bit loads and stores
;// and by using 16 bit arithmetic. 4x4 block is processed
;// in each round.
;//
;// |a_11|a_11|a_11|a_11|...|a_1n|a_1n|a_1n|a_1n|
;// |b_11|b_11|b_11|b_11|...|b_1n|b_1n|b_1n|b_1n|
;// |c_11|c_11|c_11|c_11|...|c_1n|c_1n|c_1n|c_1n|
;// |d_11|d_11|d_11|d_11|...|d_1n|d_1n|d_1n|d_1n|
;// ..
;// ..
;// |a_m1|a_m1|a_m1|a_m1|...
;// |b_m1|b_m1|b_m1|b_m1|...
;// |c_m1|c_m1|c_m1|c_m1|...
;// |d_m1|d_m1|d_m1|d_m1|...
h264bsdInterpolateVerQuarter
STMFD sp!, {r0-r11, lr}
SUB sp, sp, #0x1e4
CMP x0, #0
BLT do_fill ;// (x0 < 0)
LDR partW, [sp,#0x220] ;// partWidth
ADD tmp5, x0, partW ;// (x0+partWidth)
LDR width, [sp,#0x218] ;// width
CMP tmp5, width
BHI do_fill ;// (x0+partW)>width
CMP y0, #0
BLT do_fill ;// (y0 < 0)
LDR partH, [sp,#0x224] ;// partHeight
ADD tmp6, y0, partH ;// (y0+partHeight)
ADD tmp6, tmp6, #5 ;// (y0+partH+5)
LDR height, [sp,#0x21c] ;// height
CMP tmp6, height
BLS skip_fill ;// no overfill needed
do_fill
LDR partH, [sp,#0x224] ;// partHeight
ADD tmp5, partH, #5 ;// r2 = partH + 5;
LDR height, [sp,#0x21c] ;// height
LDR partW, [sp,#0x220] ;// partWidth
STMIB sp, {height, partW} ;// sp+4 = height, sp+8 = partWidth
STR tmp5, [sp,#0xc] ;// sp+c partHeight+5
STR partW, [sp,#0x10] ;// sp+10 = partWidth
LDR width, [sp,#0x218] ;// width
STR width, [sp,#0] ;// sp+0 = width
ADD buff, sp, #0x28 ;// buff = p1[21*21/4+1]
BL h264bsdFillBlock
MOV x0, #0
STR x0,[sp,#0x1ec] ;// x0 = 0
STR x0,[sp,#0x1f0] ;// y0 = 0
ADD ref,sp,#0x28 ;// ref = p1
STR partW, [sp,#0x218]
skip_fill
LDR x0 ,[sp,#0x1ec] ;// x0
LDR y0 ,[sp,#0x1f0] ;// y0
LDR width, [sp,#0x218] ;// width
MLA tmp6, width, y0, x0 ;// y0*width+x0
ADD ref, ref, tmp6 ;// ref += y0*width+x0
LDR mb, [sp, #0x1e8] ;// mb
ADD count, partW, partH, LSL #8 ;// |xx|xx|partH|partW|
LDR tmp5, = 0x00010100
RSB count, tmp5, count, LSL #8 ;// |xx|partH-1|partW-1|xx|
LDR tmp2, [sp, #0x228] ;// verOffset
ADD count, count, tmp2 ;// |xx|partH-1|partW-1|verOffset|
LDR plus16, = 0x00100010
AND tmp1, count, #0x0000FF00 ;// partWidth
loop_y
ADD count, count, tmp1, LSL #16 ;// partWidth-1 to top byte
loop_x
LDR tmp1, [ref], width ;// |a4|a3|a2|a1|
LDR tmp2, [ref], width ;// |c4|c3|c2|c1|
LDR tmp3, [ref], width ;// |g4|g3|g2|g1|
LDR tmp4, [ref], width ;// |m4|m3|m2|m1|
LDR tmp5, [ref], width ;// |r4|r3|r2|r1|
LDR tmp6, [ref], width ;// |t4|t3|t2|t1|
;// first four pixels
UXTB16 tmpa, tmp3 ;// |g3|g1|
UXTAB16 tmpa, tmpa, tmp4 ;// |g3+m3|g1+m1|
UXTB16 tmpb, tmp2 ;// |c3|c1|
ADD tmpa, tmpa, tmpa, LSL #2 ;// 5(G+M)
UXTAB16 tmpb, tmpb, tmp5 ;// |c3+r3|c1+r1|
ADD tmpa, plus16, tmpa, LSL #2 ;// 16+20(G+M)
UXTAB16 tmpa, tmpa, tmp1 ;// 16+20(G+M)+A
UXTAB16 tmpa, tmpa, tmp6 ;// 16+20(G+M)+A+T
ADD tmpb, tmpb, tmpb, LSL #2 ;// 5(C+R)
SSUB16 tmpa, tmpa, tmpb ;// 16+20(G+M)+(A+T)-5(C+R)
USAT16 tmpb, #13, tmpa ;// saturate
LDR res, = 0x00FF00FF
UXTB16 tmpa, tmp3, ROR #8 ;// |g4|g2|
UXTAB16 tmpa, tmpa, tmp4, ROR #8 ;// |g4+m4|g2+m2|
AND res, res, tmpb, LSR #5 ;// mask and divide by 32
ADD tmpa, tmpa, tmpa, LSL #2 ;// 5(G+M)
UXTB16 tmpb, tmp2, ROR #8 ;// |c4|c2|
ADD tmpa, plus16, tmpa, LSL #2 ;// 16+20(G+M)
UXTAB16 tmpb, tmpb, tmp5, ROR #8 ;// |c4+r4|c2+r2|
UXTAB16 tmpa, tmpa, tmp1, ROR #8 ;// 16+20(G+M)+A
UXTAB16 tmpa, tmpa, tmp6, ROR #8 ;// 16+20(G+M)+A+T
ADD tmpb, tmpb, tmpb, LSL #2 ;// 5(C+R)
SSUB16 tmpa, tmpa, tmpb ;// 16+20(G+M)+(A+T)-5(C+R)
USAT16 tmpb, #13, tmpa ;// saturate
MOVS tmp1, count, LSL #31 ;// update flags (verOffset)
LDR tmpa, = 0xFF00FF00
MVNEQ tmp1, tmp3 ;// select verOffset=0
MVNNE tmp1, tmp4 ;// select verOffset=1
AND tmpa, tmpa, tmpb, LSL #3 ;// mask and divede by 32
ORR res, res, tmpa
LDR tmpa, = 0x80808080
UHSUB8 res, res, tmp1 ;// bilinear interpolation
LDR tmp1, [ref], width ;// load next row
EOR res, res, tmpa ;// correct sign
STR res, [mb], #16 ;// next row (mb)
;// tmp2 = |a4|a3|a2|a1|
;// tmp3 = |c4|c3|c2|c1|
;// tmp4 = |g4|g3|g2|g1|
;// tmp5 = |m4|m3|m2|m1|
;// tmp6 = |r4|r3|r2|r1|
;// tmp1 = |t4|t3|t2|t1|
;// second four pixels
UXTB16 tmpa, tmp4 ;// |g3|g1|
UXTAB16 tmpa, tmpa, tmp5 ;// |g3+m3|g1+m1|
UXTB16 tmpb, tmp3 ;// |c3|c1|
ADD tmpa, tmpa, tmpa, LSL #2 ;// 5(G+M)
UXTAB16 tmpb, tmpb, tmp6 ;// |c3+r3|c1+r1|
ADD tmpa, plus16, tmpa, LSL #2 ;// 16+20(G+M)
UXTAB16 tmpa, tmpa, tmp2 ;// 16+20(G+M)+A
UXTAB16 tmpa, tmpa, tmp1 ;// 16+20(G+M)+A+T
ADD tmpb, tmpb, tmpb, LSL #2 ;// 5(C+R)
SSUB16 tmpa, tmpa, tmpb ;// 16+20(G+M)+(A+T)-5(C+R)
USAT16 tmpb, #13, tmpa ;// saturate
LDR res, = 0x00FF00FF
UXTB16 tmpa, tmp4, ROR #8 ;// |g4|g2|
UXTAB16 tmpa, tmpa, tmp5, ROR #8 ;// |g4+m4|g2+m2|
AND res, res, tmpb, LSR #5 ;// mask and divide by 32
ADD tmpa, tmpa, tmpa, LSL #2 ;// 5(G+M)
UXTB16 tmpb, tmp3, ROR #8 ;// |c4|c2|
ADD tmpa, plus16, tmpa, LSL #2 ;// 16+20(G+M)
UXTAB16 tmpb, tmpb, tmp6, ROR #8 ;// |c4+r4|c2+r2|
UXTAB16 tmpa, tmpa, tmp2, ROR #8 ;// 16+20(G+M)+A
UXTAB16 tmpa, tmpa, tmp1, ROR #8 ;// 16+20(G+M)+A+T
ADD tmpb, tmpb, tmpb, LSL #2 ;// 5(C+R)
SSUB16 tmpa, tmpa, tmpb ;// 16+20(G+M)+(A+T)-5(C+R)
USAT16 tmpb, #13, tmpa ;// saturate
LDR tmpa, = 0xFF00FF00
MVNEQ tmp2, tmp4 ;// select verOffset=0
MVNNE tmp2, tmp5 ;// select verOffset=1
AND tmpa, tmpa, tmpb, LSL #3 ;// mask and divide by 32
ORR res, res, tmpa
LDR tmpa, = 0x80808080
UHSUB8 res, res, tmp2 ;// bilinear interpolation
LDR tmp2, [ref], width ;// load next row
EOR res, res, tmpa ;// correct sign
STR res, [mb], #16 ;// next row
;// tmp3 = |a4|a3|a2|a1|
;// tmp4 = |c4|c3|c2|c1|
;// tmp5 = |g4|g3|g2|g1|
;// tmp6 = |m4|m3|m2|m1|
;// tmp1 = |r4|r3|r2|r1|
;// tmp2 = |t4|t3|t2|t1|
;// third four pixels
UXTB16 tmpa, tmp5 ;// |g3|g1|
UXTAB16 tmpa, tmpa, tmp6 ;// |g3+m3|g1+m1|
UXTB16 tmpb, tmp4 ;// |c3|c1|
ADD tmpa, tmpa, tmpa, LSL #2 ;// 5(G+M)
UXTAB16 tmpb, tmpb, tmp1 ;// |c3+r3|c1+r1|
ADD tmpa, plus16, tmpa, LSL #2 ;// 16+20(G+M)
UXTAB16 tmpa, tmpa, tmp3 ;// 16+20(G+M)+A
UXTAB16 tmpa, tmpa, tmp2 ;// 16+20(G+M)+A+T
ADD tmpb, tmpb, tmpb, LSL #2 ;// 5(C+R)
SSUB16 tmpa, tmpa, tmpb ;// 16+20(G+M)+(A+T)-5(C+R)
USAT16 tmpb, #13, tmpa ;// saturate
LDR res, = 0x00FF00FF
UXTB16 tmpa, tmp5, ROR #8 ;// |g4|g2|
UXTAB16 tmpa, tmpa, tmp6, ROR #8 ;// |g4+m4|g2+m2|
AND res, res, tmpb, LSR #5 ;// mask and divide by 32
ADD tmpa, tmpa, tmpa, LSL #2 ;// 5(G+M)
UXTB16 tmpb, tmp4, ROR #8 ;// |c4|c2|
ADD tmpa, plus16, tmpa, LSL #2 ;// 16+20(G+M)
UXTAB16 tmpb, tmpb, tmp1, ROR #8 ;// |c4+r4|c2+r2|
UXTAB16 tmpa, tmpa, tmp3, ROR #8 ;// 16+20(G+M)+A
UXTAB16 tmpa, tmpa, tmp2, ROR #8 ;// 16+20(G+M)+A+T
ADD tmpb, tmpb, tmpb, LSL #2 ;// 5(C+R)
SSUB16 tmpa, tmpa, tmpb ;// 16+20(G+M)+(A+T)-5(C+R)
USAT16 tmpb, #13, tmpa ;// saturate
LDR tmpa, = 0xFF00FF00
MVNEQ tmp3, tmp5 ;// select verOffset=0
MVNNE tmp3, tmp6 ;// select verOffset=1
AND tmpa, tmpa, tmpb, LSL #3 ;// mask and divide by 32
ORR res, res, tmpa
LDR tmpa, = 0x80808080
UHSUB8 res, res, tmp3 ;// bilinear interpolation
LDR tmp3, [ref] ;// load next row
EOR res, res, tmpa ;// correct sign
STR res, [mb], #16 ;// next row
;// tmp4 = |a4|a3|a2|a1|
;// tmp5 = |c4|c3|c2|c1|
;// tmp6 = |g4|g3|g2|g1|
;// tmp1 = |m4|m3|m2|m1|
;// tmp2 = |r4|r3|r2|r1|
;// tmp3 = |t4|t3|t2|t1|
;// fourth four pixels
UXTB16 tmpa, tmp6 ;// |g3|g1|
UXTAB16 tmpa, tmpa, tmp1 ;// |g3+m3|g1+m1|
UXTB16 tmpb, tmp5 ;// |c3|c1|
ADD tmpa, tmpa, tmpa, LSL #2 ;// 5(G+M)
UXTAB16 tmpb, tmpb, tmp2 ;// |c3+r3|c1+r1|
ADD tmpa, plus16, tmpa, LSL #2 ;// 16+20(G+M)
UXTAB16 tmpa, tmpa, tmp4 ;// 16+20(G+M)+A
UXTAB16 tmpa, tmpa, tmp3 ;// 16+20(G+M)+A+T
ADD tmpb, tmpb, tmpb, LSL #2 ;// 5(C+R)
SSUB16 tmpa, tmpa, tmpb ;// 16+20(G+M)+(A+T)-5(C+R)
USAT16 tmpb, #13, tmpa ;// saturate
LDR res, = 0x00FF00FF
UXTB16 tmpa, tmp6, ROR #8 ;// |g4|g2|
UXTAB16 tmpa, tmpa, tmp1, ROR #8 ;// |g4+m4|g2+m2|
AND res, res, tmpb, LSR #5 ;// mask and divide by 32
ADD tmpa, tmpa, tmpa, LSL #2 ;// 5(G+M)
UXTB16 tmpb, tmp5, ROR #8 ;// |c4|c2|
ADD tmpa, plus16, tmpa, LSL #2 ;// 16+20(G+M)
UXTAB16 tmpb, tmpb, tmp2, ROR #8 ;// |c4+r4|c2+r2|
UXTAB16 tmpa, tmpa, tmp4, ROR #8 ;// 16+20(G+M)+A
UXTAB16 tmpa, tmpa, tmp3, ROR #8 ;// 16+20(G+M)+A+T
ADD tmpb, tmpb, tmpb, LSL #2 ;// 5(C+R)
SSUB16 tmpa, tmpa, tmpb ;// 16+20(G+M)+(A+T)-5(C+R)
USAT16 tmpb, #13, tmpa ;// saturate
LDR tmp4, = 0xFF00FF00
MVNEQ tmp5, tmp6 ;// select verOffset=0
MVNNE tmp5, tmp1 ;// select verOffset=1
AND tmpa, tmp4, tmpb, LSL #3 ;// mask and divide by 32
ORR res, res, tmpa
LDR tmpa, = 0x80808080
UHSUB8 res, res, tmp5 ;// bilinear interpolation
;// decrement loop_x counter
SUBS count, count, #4<<24 ;// (partWidth-1) -= 4;
;// calculate "ref" address for next round
SUB ref, ref, width, LSL #3 ;// ref -= 8*width;
ADD ref, ref, #4; ;// next column (4 pixels)
EOR res, res, tmpa ;// correct sign
STR res, [mb], #-44
BCS loop_x
ADDS count, count, #252<<16 ;// (partHeight-1) -= 4;
ADD ref, ref, width, LSL #2 ;// ref += 4*width
AND tmp1, count, #0x0000FF00 ;// partWidth-1
MOV tmp2, #1
ADD tmp2, tmp2, tmp1, LSR #8 ;// partWidth
SUB ref, ref, tmp2 ;// ref -= partWidth
ADD mb, mb, #64;
SUB mb, mb, tmp2; ;// mb -= partWidth
BGE loop_y
ADD sp,sp,#0x1f4
LDMFD sp!, {r4-r11, pc}
END
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