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Diffstat (limited to 'libavcodec/bfin/idct_bfin.S')
| -rw-r--r-- | libavcodec/bfin/idct_bfin.S | 297 |
1 files changed, 0 insertions, 297 deletions
diff --git a/libavcodec/bfin/idct_bfin.S b/libavcodec/bfin/idct_bfin.S deleted file mode 100644 index dd427e7ffa..0000000000 --- a/libavcodec/bfin/idct_bfin.S +++ /dev/null @@ -1,297 +0,0 @@ -/* - * idct BlackFin - * - * Copyright (C) 2007 Marc Hoffman <marc.hoffman@analog.com> - * - * This file is part of Libav. - * - * Libav is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * Libav is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with Libav; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ -/* - This blackfin DSP code implements an 8x8 inverse type II DCT. - -Prototype : void ff_bfin_idct(int16_t *in) - -Registers Used : A0, A1, R0-R7, I0-I3, B0, B2, B3, M0-M2, L0-L3, P0-P5, LC0. - -Performance : - Code Size : 498 Bytes. - Cycle Count : 417 Cycles - - ------------------------------------------------------------ -Libav conformance testing results ------------------------------------------------------------ - -dct-test: modified with the following - dct_error("BFINidct", 1, ff_bfin_idct, idct, test); -produces the following output - -libavcodec> ./dct-test -i -Libav DCT/IDCT test - - 8 15 -2 21 24 17 0 10 - 2 -10 -5 -5 -3 7 -14 -3 - 2 -13 -10 -19 18 -6 6 -2 - 9 4 16 -3 9 12 10 15 - 15 -9 -2 10 1 16 0 -15 - -15 5 7 3 13 0 13 20 - -6 -15 24 9 -18 1 9 -22 - -8 25 23 2 -7 0 30 13 -IDCT BFINidct: err_inf=1 err2=0.01002344 syserr=0.00150000 maxout=266 blockSumErr=64 -IDCT BFINidct: 88.3 kdct/s - -*/ - -#include "libavutil/bfin/asm.h" - -SECTION_L1_DATA_B - -.align 4; -coefs: -.short 0x5a82; // C4 -.short 0x5a82; // C4 -.short 0x30FC; //cos(3pi/8) C6 -.short 0x7642; //cos(pi/8) C2 -.short 0x18F9; //cos(7pi/16) -.short 0x7D8A; //cos(pi/16) -.short 0x471D; //cos(5pi/16) -.short 0x6A6E; //cos(3pi/16) -.short 0x18F9; //cos(7pi/16) -.short 0x7D8A; //cos(pi/16) - -SECTION_L1_DATA_A - -vtmp: .space 256 - -#define TMP0 FP-8 -#define TMP1 FP-12 -#define TMP2 FP-16 - - -.text -DEFUN(idct,mL1, - (int16_t *block)): - -/********************** Function Prologue *********************************/ - link 16; - [--SP] = (R7:4, P5:3); // Push the registers onto the stack. - B0 = R0; // Pointer to Input matrix - RELOC(R1, P3, coefs); // Pointer to Coefficients - RELOC(R2, P3, vtmp); // Pointer to Temporary matrix - B3 = R1; - B2 = R2; - L3 = 20; // L3 is used for making the coefficient array - // circular. - // MUST BE RESTORED TO ZERO at function exit. - M1 = 16 (X); // All these registers are initialized for - M3 = 8(X); // modifying address offsets. - - I0 = B0; // I0 points to Input Element (0, 0). - I2 = B0; // I2 points to Input Element (0, 0). - I2 += M3 || R0.H = W[I0]; - // Element 0 is read into R0.H - I1 = I2; // I1 points to input Element (0, 6). - I1 += 4 || R0.L = W[I2++]; - // I2 points to input Element (0, 4). - // Element 4 is read into R0.L. - P2 = 8 (X); - P3 = 32 (X); - P4 = -32 (X); - P5 = 98 (X); - R7 = 0x8000(Z); - I3 = B3; // I3 points to Coefficients - P0 = B2; // P0 points to array Element (0, 0) of temp - P1 = B2; - R7 = [I3++] || [TMP2]=R7; // Coefficient C4 is read into R7.H and R7.L. - MNOP; - NOP; - - /* - * A1 = Y0 * cos(pi/4) - * A0 = Y0 * cos(pi/4) - * A1 = A1 + Y4 * cos(pi/4) - * A0 = A0 - Y4 * cos(pi/4) - * load: - * R1=(Y2,Y6) - * R7=(C2,C6) - * res: - * R3=Y0, R2=Y4 - */ - A1=R7.H*R0.H, A0=R7.H*R0.H (IS) || I0+= 4 || R1.L=W[I1++]; - R3=(A1+=R7.H*R0.L), R2=(A0-=R7.H*R0.L) (IS) || R1.H=W[I0--] || R7=[I3++]; - - LSETUP (.0, .1) LC0 = P2; // perform 8 1d idcts - - P2 = 112 (X); - P1 = P1 + P2; // P1 points to element (7, 0) of temp buffer. - P2 = -94(X); - -.0: - /* - * A1 = Y2 * cos(3pi/8) - * A0 = Y2 * cos(pi/8) - * A1 = A1 - Y6 * cos(pi/8) - * A0 = A0 + Y6 * cos(3pi/8) - * R5 = (Y1,Y7) - * R7 = (C1,C7) - * res: - * R1=Y2, R0=Y6 - */ - A1=R7.L*R1.H, A0=R7.H*R1.H (IS) || I0+=4 || R5.H=W[I0]; - R1=(A1-=R7.H*R1.L), R0=(A0+=R7.L*R1.L) (IS) || R5.L=W[I1--] || R7=[I3++]; - /* - * Y0 = Y0 + Y6. - * Y4 = Y4 + Y2. - * Y2 = Y4 - Y2. - * Y6 = Y0 - Y6. - * R3 is saved - * R6.l=Y3 - * note: R3: Y0, R2: Y4, R1: Y2, R0: Y6 - */ - R3=R3+R0, R0=R3-R0; - R2=R2+R1, R1=R2-R1 || [TMP0]=R3 || R6.L=W[I0--]; - /* - * Compute the odd portion (1,3,5,7) even is done. - * - * Y1 = C7 * Y1 - C1 * Y7 + C3 * Y5 - C5 * Y3. - * Y7 = C1 * Y1 + C7 * Y7 + C5 * Y5 + C3 * Y3. - * Y5 = C5 * Y1 + C3 * Y7 + C7 * Y5 - C1 * Y3. - * Y3 = C3 * Y1 - C5 * Y7 - C1 * Y5 - C7 * Y3. - */ - // R5=(Y1,Y7) R6=(Y5,Y3) // R7=(C1,C7) - A1 =R7.L*R5.H, A0 =R7.H*R5.H (IS) || [TMP1]=R2 || R6.H=W[I2--]; - A1-=R7.H*R5.L, A0+=R7.L*R5.L (IS) || I0-=4 || R7=[I3++]; - A1+=R7.H*R6.H, A0+=R7.L*R6.H (IS) || I0+=M1; // R7=(C3,C5) - R3 =(A1-=R7.L*R6.L), R2 =(A0+=R7.H*R6.L) (IS); - A1 =R7.L*R5.H, A0 =R7.H*R5.H (IS) || R4=[TMP0]; - A1+=R7.H*R5.L, A0-=R7.L*R5.L (IS) || I1+=M1 || R7=[I3++]; // R7=(C1,C7) - A1+=R7.L*R6.H, A0-=R7.H*R6.H (IS); - R7 =(A1-=R7.H*R6.L), R6 =(A0-=R7.L*R6.L) (IS) || I2+=M1; - // R3=Y1, R2=Y7, R7=Y5, R6=Y3 - - /* Transpose write column. */ - R5.H=R4+R2 (RND12); // Y0=Y0+Y7 - R5.L=R4-R2 (RND12) || R4 = [TMP1]; // Y7=Y7-Y0 - R2.H=R1+R7 (RND12) || W[P0++P3]=R5.H; // Y2=Y2+Y5 st Y0 - R2.L=R1-R7 (RND12) || W[P1++P4]=R5.L || R7=[I3++]; // Y5=Y2-Y5 st Y7 - R5.H=R0-R3 (RND12) || W[P0++P3]=R2.H || R1.L=W[I1++]; // Y1=Y6-Y1 st Y2 - R5.L=R0+R3 (RND12) || W[P1++P4]=R2.L || R0.H=W[I0++]; // Y6=Y6+Y1 st Y5 - R3.H=R4-R6 (RND12) || W[P0++P3]=R5.H || R0.L=W[I2++]; // Y3=Y3-Y4 st Y1 - R3.L=R4+R6 (RND12) || W[P1++P4]=R5.L || R1.H=W[I0++]; // Y4=Y3+Y4 st Y6 - - /* pipeline loop start, + drain Y3, Y4 */ - A1=R7.H*R0.H, A0=R7.H*R0.H (IS) || W[P0++P2]= R3.H || R1.H = W[I0--]; -.1: R3=(A1+=R7.H*R0.L), R2=(A0-=R7.H*R0.L) (IS) || W[P1++P5]= R3.L || R7 = [I3++]; - - - - I0 = B2; // I0 points to Input Element (0, 0) - I2 = B2; // I2 points to Input Element (0, 0) - I2 += M3 || R0.H = W[I0]; - // Y0 is read in R0.H - I1 = I2; // I1 points to input Element (0, 6) - I1 += 4 || R0.L = W[I2++]; - // I2 points to input Element (0, 4) - // Y4 is read in R0.L - P2 = 8 (X); - I3 = B3; // I3 points to Coefficients - P0 = B0; // P0 points to array Element (0, 0) for writing - // output - P1 = B0; - R7 = [I3++]; // R7.H = C4 and R7.L = C4 - NOP; - - /* - * A1 = Y0 * cos(pi/4) - * A0 = Y0 * cos(pi/4) - * A1 = A1 + Y4 * cos(pi/4) - * A0 = A0 - Y4 * cos(pi/4) - * load: - * R1=(Y2,Y6) - * R7=(C2,C6) - * res: - * R3=Y0, R2=Y4 - */ - A1=R7.H*R0.H, A0=R7.H*R0.H (IS) || I0+=4 || R1.L=W[I1++]; - R3=(A1+=R7.H*R0.L), R2=(A0-=R7.H*R0.L) (IS) || R1.H=W[I0--] || R7=[I3++]; - - LSETUP (.2, .3) LC0 = P2; // peform 8 1d idcts - P2 = 112 (X); - P1 = P1 + P2; - P2 = -94(X); - -.2: - /* - * A1 = Y2 * cos(3pi/8) - * A0 = Y2 * cos(pi/8) - * A1 = A1 - Y6 * cos(pi/8) - * A0 = A0 + Y6 * cos(3pi/8) - * R5 = (Y1,Y7) - * R7 = (C1,C7) - * res: - * R1=Y2, R0=Y6 - */ - A1=R7.L*R1.H, A0=R7.H*R1.H (IS) || I0+=4 || R5.H=W[I0]; - R1=(A1-=R7.H*R1.L), R0=(A0+=R7.L*R1.L) (IS) || R5.L=W[I1--] || R7=[I3++]; - /* - * Y0 = Y0 + Y6. - * Y4 = Y4 + Y2. - * Y2 = Y4 - Y2. - * Y6 = Y0 - Y6. - * R3 is saved - * R6.l=Y3 - * note: R3: Y0, R2: Y4, R1: Y2, R0: Y6 - */ - R3=R3+R0, R0=R3-R0; - R2=R2+R1, R1=R2-R1 || [TMP0]=R3 || R6.L=W[I0--]; - /* - * Compute the odd portion (1,3,5,7) even is done. - * - * Y1 = C7 * Y1 - C1 * Y7 + C3 * Y5 - C5 * Y3. - * Y7 = C1 * Y1 + C7 * Y7 + C5 * Y5 + C3 * Y3. - * Y5 = C5 * Y1 + C3 * Y7 + C7 * Y5 - C1 * Y3. - * Y3 = C3 * Y1 - C5 * Y7 - C1 * Y5 - C7 * Y3. - */ - // R5=(Y1,Y7) R6=(Y5,Y3) // R7=(C1,C7) - A1 =R7.L*R5.H, A0 =R7.H*R5.H (IS) || [TMP1]=R2 || R6.H=W[I2--]; - A1-=R7.H*R5.L, A0+=R7.L*R5.L (IS) || I0-=4 || R7=[I3++]; - A1+=R7.H*R6.H, A0+=R7.L*R6.H (IS) || I0+=M1; // R7=(C3,C5) - R3 =(A1-=R7.L*R6.L), R2 =(A0+=R7.H*R6.L) (IS); - A1 =R7.L*R5.H, A0 =R7.H*R5.H (IS) || R4=[TMP0]; - A1+=R7.H*R5.L, A0-=R7.L*R5.L (IS) || I1+=M1 || R7=[I3++]; // R7=(C1,C7) - A1+=R7.L*R6.H, A0-=R7.H*R6.H (IS); - R7 =(A1-=R7.H*R6.L), R6 =(A0-=R7.L*R6.L) (IS) || I2+=M1; - // R3=Y1, R2=Y7, R7=Y5, R6=Y3 - - /* Transpose write column. */ - R5.H=R4+R2 (RND20); // Y0=Y0+Y7 - R5.L=R4-R2 (RND20) || R4 = [TMP1]; // Y7=Y7-Y0 - R2.H=R1+R7 (RND20) || W[P0++P3]=R5.H; // Y2=Y2+Y5 st Y0 - R2.L=R1-R7 (RND20) || W[P1++P4]=R5.L || R7=[I3++]; // Y5=Y2-Y5 st Y7 - R5.H=R0-R3 (RND20) || W[P0++P3]=R2.H || R1.L=W[I1++]; // Y1=Y6-Y1 st Y2 - R5.L=R0+R3 (RND20) || W[P1++P4]=R2.L || R0.H=W[I0++]; // Y6=Y6+Y1 st Y5 - R3.H=R4-R6 (RND20) || W[P0++P3]=R5.H || R0.L=W[I2++]; // Y3=Y3-Y4 st Y1 - R3.L=R4+R6 (RND20) || W[P1++P4]=R5.L || R1.H=W[I0++]; // Y4=Y3+Y4 st Y6 - - /* pipeline loop start, + drain Y3, Y4 */ - A1=R7.H*R0.H, A0=R7.H*R0.H (IS) || W[P0++P2]= R3.H || R1.H = W[I0--]; -.3: R3=(A1+=R7.H*R0.L), R2=(A0-=R7.H*R0.L) (IS) || W[P1++P5]= R3.L || R7 = [I3++]; - - L3 = 0; - (R7:4,P5:3)=[SP++]; - unlink; - RTS; -DEFUN_END(idct) |