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linking. The FDPIC relocs also break for any other format. Thus check the compiler environment and select the appropriate sections/relocs. patch by Mike Frysinger, vapier.adi a gmail d com Originally committed as revision 12125 to svn://svn.ffmpeg.org/ffmpeg/trunk
282 lines
10 KiB
ArmAsm
282 lines
10 KiB
ArmAsm
/*
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* vp3_idct BlackFin
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*
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* Copyright (C) 2007 Marc Hoffman <marc.hoffman@analog.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg 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 FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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This blackfin DSP code implements an 8x8 inverse type II DCT.
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Prototype : void ff_bfin_vp3_idct(DCTELEM *in)
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Registers Used : A0, A1, R0-R7, I0-I3, B0, B2, B3, M0-M2, L0-L3, P0-P5, LC0.
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*/
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#include "config_bfin.h"
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#ifdef __FDPIC__
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.section .l1.data.B,"aw",@progbits
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#else
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.data
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#endif
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.align 4;
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coefs:
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.short 0x5a82; // C4
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.short 0x5a82; // C4
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.short 0x30FC; //cos(3pi/8) C6
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.short 0x7642; //cos(pi/8) C2
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.short 0x18F9; //cos(7pi/16)
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.short 0x7D8A; //cos(pi/16)
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.short 0x471D; //cos(5pi/16)
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.short 0x6A6E; //cos(3pi/16)
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.short 0x18F9; //cos(7pi/16)
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.short 0x7D8A; //cos(pi/16)
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#ifdef __FDPIC__
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.section .l1.data.A
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#endif
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vtmp: .space 256
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#define TMP0 FP-8
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#define TMP1 FP-12
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#define TMP2 FP-16
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.text
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DEFUN(vp3_idct,mL1,
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(DCTELEM *block)):
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/********************** Function Prologue *********************************/
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link 16;
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[--SP] = (R7:4, P5:3); // Push the registers onto the stack.
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B0 = R0; // Pointer to Input matrix
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RELOC(R1, P3, coefs); // Pointer to Coefficients
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RELOC(R2, P3, vtmp); // Pointer to Temporary matrix
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B3 = R1;
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B2 = R2;
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L3 = 20; // L3 is used for making the coefficient array
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// circular.
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// MUST BE RESTORED TO ZERO at function exit.
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M1 = 16 (X); // All these registers are initialized for
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M3 = 8(X); // modifying address offsets.
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I0 = B0; // I0 points to Input Element (0, 0).
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I2 = B0; // I2 points to Input Element (0, 0).
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I2 += M3 || R0.H = W[I0];
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// Element 0 is read into R0.H
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I1 = I2; // I1 points to input Element (0, 6).
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I1 += 4 || R0.L = W[I2++];
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// I2 points to input Element (0, 4).
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// Element 4 is read into R0.L.
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P2 = 8 (X);
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P3 = 32 (X);
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P4 = -32 (X);
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P5 = 98 (X);
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R7 = 0x8000(Z);
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I3 = B3; // I3 points to Coefficients
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P0 = B2; // P0 points to array Element (0, 0) of temp
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P1 = B2;
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R7 = [I3++] || [TMP2]=R7; // Coefficient C4 is read into R7.H and R7.L.
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MNOP;
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NOP;
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/*
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* A1 = Y0 * cos(pi/4)
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* A0 = Y0 * cos(pi/4)
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* A1 = A1 + Y4 * cos(pi/4)
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* A0 = A0 - Y4 * cos(pi/4)
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* load:
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* R1=(Y2,Y6)
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* R7=(C2,C6)
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* res:
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* R3=Y0, R2=Y4
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*/
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A1=R7.H*R0.H, A0=R7.H*R0.H (IS) || I0+= 4 || R1.L=W[I1++];
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R3=(A1+=R7.H*R0.L), R2=(A0-=R7.H*R0.L) (IS) || R1.H=W[I0--] || R7=[I3++];
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LSETUP (.0, .1) LC0 = P2; // perform 8 1d idcts
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P2 = 112 (X);
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P1 = P1 + P2; // P1 points to element (7, 0) of temp buffer.
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P2 = -94(X);
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.0:
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/*
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* A1 = Y2 * cos(3pi/8)
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* A0 = Y2 * cos(pi/8)
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* A1 = A1 - Y6 * cos(pi/8)
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* A0 = A0 + Y6 * cos(3pi/8)
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* R5 = (Y1,Y7)
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* R7 = (C1,C7)
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* res:
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* R1=Y2, R0=Y6
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*/
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A1=R7.L*R1.H, A0=R7.H*R1.H (IS) || I0+=4 || R5.H=W[I0];
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R1=(A1-=R7.H*R1.L), R0=(A0+=R7.L*R1.L) (IS) || R5.L=W[I1--] || R7=[I3++];
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/*
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* Y0 = Y0 + Y6.
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* Y4 = Y4 + Y2.
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* Y2 = Y4 - Y2.
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* Y6 = Y0 - Y6.
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* R3 is saved
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* R6.l=Y3
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* note: R3: Y0, R2: Y4, R1: Y2, R0: Y6
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*/
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R3=R3+R0, R0=R3-R0;
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R2=R2+R1, R1=R2-R1 || [TMP0]=R3 || R6.L=W[I0--];
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/*
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* Compute the odd portion (1,3,5,7) even is done.
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*
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* Y1 = C7 * Y1 - C1 * Y7 + C3 * Y5 - C5 * Y3.
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* Y7 = C1 * Y1 + C7 * Y7 + C5 * Y5 + C3 * Y3.
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* Y5 = C5 * Y1 + C3 * Y7 + C7 * Y5 - C1 * Y3.
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* Y3 = C3 * Y1 - C5 * Y7 - C1 * Y5 - C7 * Y3.
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*/
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// R5=(Y1,Y7) R6=(Y5,Y3) // R7=(C1,C7)
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A1 =R7.L*R5.H, A0 =R7.H*R5.H (IS) || [TMP1]=R2 || R6.H=W[I2--];
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A1-=R7.H*R5.L, A0+=R7.L*R5.L (IS) || I0-=4 || R7=[I3++];
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A1+=R7.H*R6.H, A0+=R7.L*R6.H (IS) || I0+=M1; // R7=(C3,C5)
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R3 =(A1-=R7.L*R6.L), R2 =(A0+=R7.H*R6.L) (IS);
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A1 =R7.L*R5.H, A0 =R7.H*R5.H (IS) || R4=[TMP0];
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A1+=R7.H*R5.L, A0-=R7.L*R5.L (IS) || I1+=M1 || R7=[I3++]; // R7=(C1,C7)
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A1+=R7.L*R6.H, A0-=R7.H*R6.H (IS);
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R7 =(A1-=R7.H*R6.L), R6 =(A0-=R7.L*R6.L) (IS) || I2+=M1;
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// R3=Y1, R2=Y7, R7=Y5, R6=Y3
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/* Transpose write column. */
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R5.H=R4+R2 (RND12); // Y0=Y0+Y7
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R5.L=R4-R2 (RND12) || R4 = [TMP1]; // Y7=Y7-Y0
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R2.H=R1+R7 (RND12) || W[P0++P3]=R5.H; // Y2=Y2+Y5 st Y0
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R2.L=R1-R7 (RND12) || W[P1++P4]=R5.L || R7=[I3++]; // Y5=Y2-Y5 st Y7
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R5.H=R0-R3 (RND12) || W[P0++P3]=R2.H || R1.L=W[I1++]; // Y1=Y6-Y1 st Y2
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R5.L=R0+R3 (RND12) || W[P1++P4]=R2.L || R0.H=W[I0++]; // Y6=Y6+Y1 st Y5
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R3.H=R4-R6 (RND12) || W[P0++P3]=R5.H || R0.L=W[I2++]; // Y3=Y3-Y4 st Y1
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R3.L=R4+R6 (RND12) || W[P1++P4]=R5.L || R1.H=W[I0++]; // Y4=Y3+Y4 st Y6
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/* pipeline loop start, + drain Y3, Y4 */
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A1=R7.H*R0.H, A0=R7.H*R0.H (IS) || W[P0++P2]= R3.H || R1.H = W[I0--];
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.1: R3=(A1+=R7.H*R0.L), R2=(A0-=R7.H*R0.L) (IS) || W[P1++P5]= R3.L || R7 = [I3++];
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I0 = B2; // I0 points to Input Element (0, 0)
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I2 = B2; // I2 points to Input Element (0, 0)
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I2 += M3 || R0.H = W[I0];
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// Y0 is read in R0.H
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I1 = I2; // I1 points to input Element (0, 6)
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I1 += 4 || R0.L = W[I2++];
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// I2 points to input Element (0, 4)
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// Y4 is read in R0.L
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P2 = 8 (X);
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I3 = B3; // I3 points to Coefficients
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P0 = B0; // P0 points to array Element (0, 0) for writing
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// output
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P1 = B0;
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R7 = [I3++]; // R7.H = C4 and R7.L = C4
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NOP;
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/*
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* A1 = Y0 * cos(pi/4)
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* A0 = Y0 * cos(pi/4)
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* A1 = A1 + Y4 * cos(pi/4)
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* A0 = A0 - Y4 * cos(pi/4)
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* load:
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* R1=(Y2,Y6)
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* R7=(C2,C6)
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* res:
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* R3=Y0, R2=Y4
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*/
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A1=R7.H*R0.H, A0=R7.H*R0.H (IS) || I0+=4 || R1.L=W[I1++];
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R3=(A1+=R7.H*R0.L), R2=(A0-=R7.H*R0.L) (IS) || R1.H=W[I0--] || R7=[I3++];
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LSETUP (.2, .3) LC0 = P2; // peform 8 1d idcts
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P2 = 112 (X);
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P1 = P1 + P2;
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P2 = -94(X);
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.2:
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/*
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* A1 = Y2 * cos(3pi/8)
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* A0 = Y2 * cos(pi/8)
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* A1 = A1 - Y6 * cos(pi/8)
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* A0 = A0 + Y6 * cos(3pi/8)
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* R5 = (Y1,Y7)
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* R7 = (C1,C7)
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* res:
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* R1=Y2, R0=Y6
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*/
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A1=R7.L*R1.H, A0=R7.H*R1.H (IS) || I0+=4 || R5.H=W[I0];
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R1=(A1-=R7.H*R1.L), R0=(A0+=R7.L*R1.L) (IS) || R5.L=W[I1--] || R7=[I3++];
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/*
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* Y0 = Y0 + Y6.
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* Y4 = Y4 + Y2.
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* Y2 = Y4 - Y2.
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* Y6 = Y0 - Y6.
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* R3 is saved
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* R6.l=Y3
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* note: R3: Y0, R2: Y4, R1: Y2, R0: Y6
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*/
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R3=R3+R0, R0=R3-R0;
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R2=R2+R1, R1=R2-R1 || [TMP0]=R3 || R6.L=W[I0--];
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/*
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* Compute the odd portion (1,3,5,7) even is done.
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*
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* Y1 = C7 * Y1 - C1 * Y7 + C3 * Y5 - C5 * Y3.
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* Y7 = C1 * Y1 + C7 * Y7 + C5 * Y5 + C3 * Y3.
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* Y5 = C5 * Y1 + C3 * Y7 + C7 * Y5 - C1 * Y3.
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* Y3 = C3 * Y1 - C5 * Y7 - C1 * Y5 - C7 * Y3.
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*/
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// R5=(Y1,Y7) R6=(Y5,Y3) // R7=(C1,C7)
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A1 =R7.L*R5.H, A0 =R7.H*R5.H (IS) || [TMP1]=R2 || R6.H=W[I2--];
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A1-=R7.H*R5.L, A0+=R7.L*R5.L (IS) || I0-=4 || R7=[I3++];
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A1+=R7.H*R6.H, A0+=R7.L*R6.H (IS) || I0+=M1; // R7=(C3,C5)
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R3 =(A1-=R7.L*R6.L), R2 =(A0+=R7.H*R6.L) (IS);
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A1 =R7.L*R5.H, A0 =R7.H*R5.H (IS) || R4=[TMP0];
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A1+=R7.H*R5.L, A0-=R7.L*R5.L (IS) || I1+=M1 || R7=[I3++]; // R7=(C1,C7)
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A1+=R7.L*R6.H, A0-=R7.H*R6.H (IS);
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R7 =(A1-=R7.H*R6.L), R6 =(A0-=R7.L*R6.L) (IS) || I2+=M1;
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// R3=Y1, R2=Y7, R7=Y5, R6=Y3
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/* Transpose write column. */
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R5.H=R4+R2 (RND20); // Y0=Y0+Y7
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R5.L=R4-R2 (RND20) || R4 = [TMP1]; // Y7=Y7-Y0
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R5=R5>>>2(v);
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R2.H=R1+R7 (RND20) || W[P0++P3]=R5.H; // Y2=Y2+Y5 st Y0
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R2.L=R1-R7 (RND20) || W[P1++P4]=R5.L || R7=[I3++]; // Y5=Y2-Y5 st Y7
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R2=R2>>>2(v);
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R5.H=R0-R3 (RND20) || W[P0++P3]=R2.H || R1.L=W[I1++]; // Y1=Y6-Y1 st Y2
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R5.L=R0+R3 (RND20) || W[P1++P4]=R2.L || R0.H=W[I0++]; // Y6=Y6+Y1 st Y5
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R5=R5>>>2(v);
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R3.H=R4-R6 (RND20) || W[P0++P3]=R5.H || R0.L=W[I2++]; // Y3=Y3-Y4 st Y1
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R3.L=R4+R6 (RND20) || W[P1++P4]=R5.L || R1.H=W[I0++]; // Y4=Y3+Y4 st Y6
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R3=R3>>>2(v);
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/* pipeline loop start, + drain Y3, Y4 */
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A1=R7.H*R0.H, A0=R7.H*R0.H (IS) || W[P0++P2]= R3.H || R1.H = W[I0--];
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.3: R3=(A1+=R7.H*R0.L), R2=(A0-=R7.H*R0.L) (IS) || W[P1++P5]= R3.L || R7 = [I3++];
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L3 = 0;
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(R7:4,P5:3)=[SP++];
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unlink;
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RTS;
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DEFUN_END(vp3_idct)
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