Originally committed as revision 1448 to svn://svn.ffmpeg.org/ffmpeg/trunkpull/126/head
Romain Dolbeau
22 years ago
committed by
Michael Niedermayer
parent
f3ec2d46ba
commit
e629ab68a7
10 changed files with 273 additions and 26 deletions
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/*
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* GMC (???) |
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* AltiVec-enabled |
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* Copyright (c) 2003 Romain Dolbeau <romain@dolbeau.org> |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this library; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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#include "../dsputil.h" |
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#include "dsputil_altivec.h" |
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/*
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altivec-enhanced gmc1. ATM this code assume stride is a multiple of 8, |
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to preserve proper dst alignement. |
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*/ |
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void gmc1_altivec(UINT8 *dst /* align 8 */, UINT8 *src /* align1 */, int stride, int h, int x16, int y16, int rounder) |
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{ |
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#if 0 |
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const int A=(16-x16)*(16-y16); |
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const int B=( x16)*(16-y16); |
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const int C=(16-x16)*( y16); |
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const int D=( x16)*( y16); |
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int i; |
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for(i=0; i<h; i++) |
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{ |
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dst[0]= (A*src[0] + B*src[1] + C*src[stride+0] + D*src[stride+1] + rounder)>>8; |
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dst[1]= (A*src[1] + B*src[2] + C*src[stride+1] + D*src[stride+2] + rounder)>>8; |
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dst[2]= (A*src[2] + B*src[3] + C*src[stride+2] + D*src[stride+3] + rounder)>>8; |
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dst[3]= (A*src[3] + B*src[4] + C*src[stride+3] + D*src[stride+4] + rounder)>>8; |
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dst[4]= (A*src[4] + B*src[5] + C*src[stride+4] + D*src[stride+5] + rounder)>>8; |
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dst[5]= (A*src[5] + B*src[6] + C*src[stride+5] + D*src[stride+6] + rounder)>>8; |
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dst[6]= (A*src[6] + B*src[7] + C*src[stride+6] + D*src[stride+7] + rounder)>>8; |
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dst[7]= (A*src[7] + B*src[8] + C*src[stride+7] + D*src[stride+8] + rounder)>>8; |
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dst+= stride; |
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src+= stride; |
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} |
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#else |
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const unsigned short __attribute__ ((aligned(16))) rounder_a[8] = |
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{rounder, rounder, rounder, rounder, |
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rounder, rounder, rounder, rounder}; |
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const unsigned short __attribute__ ((aligned(16))) ABCD[8] = |
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{ |
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(16-x16)*(16-y16), /* A */ |
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( x16)*(16-y16), /* B */ |
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(16-x16)*( y16), /* C */ |
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( x16)*( y16), /* D */ |
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0, 0, 0, 0 /* padding */ |
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}; |
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register const vector unsigned char vczero = (const vector unsigned char)(0); |
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register const vector unsigned short vcsr8 = (const vector unsigned short)(8); |
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register vector unsigned char dstv, dstv2, src_0, src_1, srcvA, srcvB, srcvC, srcvD; |
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register vector unsigned short Av, Bv, Cv, Dv, rounderV, tempA, tempB, tempC, tempD; |
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int i; |
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unsigned long dst_odd = (unsigned long)dst & 0x0000000F; |
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unsigned long src_really_odd = (unsigned long)src & 0x0000000F; |
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tempA = vec_ld(0, (unsigned short*)ABCD); |
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Av = vec_splat(tempA, 0); |
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Bv = vec_splat(tempA, 1); |
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Cv = vec_splat(tempA, 2); |
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Dv = vec_splat(tempA, 3); |
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rounderV = vec_ld(0, (unsigned short*)rounder_a); |
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// we'll be able to pick-up our 9 char elements
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// at src from those 32 bytes
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// we load the first batch here, as inside the loop
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// we can re-use 'src+stride' from one iteration
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// as the 'src' of the next.
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src_0 = vec_ld(0, src); |
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src_1 = vec_ld(16, src); |
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srcvA = vec_perm(src_0, src_1, vec_lvsl(0, src)); |
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if (src_really_odd != 0x0000000F) |
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{ // if src & 0xF == 0xF, then (src+1) is properly aligned on the second vector.
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srcvB = vec_perm(src_0, src_1, vec_lvsl(1, src)); |
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} |
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else |
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{ |
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srcvB = src_1; |
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} |
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srcvA = vec_mergeh(vczero, srcvA); |
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srcvB = vec_mergeh(vczero, srcvB); |
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for(i=0; i<h; i++) |
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{ |
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dst_odd = (unsigned long)dst & 0x0000000F; |
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src_really_odd = (((unsigned long)src) + stride) & 0x0000000F; |
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dstv = vec_ld(0, dst); |
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// we we'll be able to pick-up our 9 char elements
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// at src + stride from those 32 bytes
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// then reuse the resulting 2 vectors srvcC and srcvD
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// as the next srcvA and srcvB
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src_0 = vec_ld(stride + 0, src); |
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src_1 = vec_ld(stride + 16, src); |
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srcvC = vec_perm(src_0, src_1, vec_lvsl(stride + 0, src)); |
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if (src_really_odd != 0x0000000F) |
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{ // if src & 0xF == 0xF, then (src+1) is properly aligned on the second vector.
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srcvD = vec_perm(src_0, src_1, vec_lvsl(stride + 1, src)); |
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} |
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else |
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{ |
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srcvD = src_1; |
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} |
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srcvC = vec_mergeh(vczero, srcvC); |
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srcvD = vec_mergeh(vczero, srcvD); |
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// OK, now we (finally) do the math :-)
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// those four instructions replaces 32 int muls & 32 int adds.
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// isn't AltiVec nice ?
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tempA = vec_mladd((vector unsigned short)srcvA, Av, rounderV); |
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tempB = vec_mladd((vector unsigned short)srcvB, Bv, tempA); |
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tempC = vec_mladd((vector unsigned short)srcvC, Cv, tempB); |
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tempD = vec_mladd((vector unsigned short)srcvD, Dv, tempC); |
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srcvA = srcvC; |
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srcvB = srcvD; |
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tempD = vec_sr(tempD, vcsr8); |
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dstv2 = vec_pack(tempD, (vector unsigned short)vczero); |
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if (dst_odd) |
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{ |
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dstv2 = vec_perm(dstv, dstv2, vcprm(0,1,s0,s1)); |
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} |
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else |
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{ |
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dstv2 = vec_perm(dstv, dstv2, vcprm(s0,s1,2,3)); |
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} |
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vec_st(dstv2, 0, dst); |
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dst += stride; |
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src += stride; |
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} |
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#endif |
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} |
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