diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/armv4l/simple_idct_arm.S')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/armv4l/simple_idct_arm.S | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/contrib/ffmpeg/libavcodec/armv4l/simple_idct_arm.S b/contrib/ffmpeg/libavcodec/armv4l/simple_idct_arm.S index b5a20f6da..98e900970 100644 --- a/contrib/ffmpeg/libavcodec/armv4l/simple_idct_arm.S +++ b/contrib/ffmpeg/libavcodec/armv4l/simple_idct_arm.S @@ -1,10 +1,12 @@ /* * simple_idct_arm.S * Copyright (C) 2002 Frederic 'dilb' Boulay. - * All Rights Reserved. * * Author: Frederic Boulay <dilb@handhelds.org> * + * The function defined in this file is derived from the simple_idct function + * from the libavcodec library part of the FFmpeg project. + * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or @@ -20,9 +22,6 @@ * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - * - * The function defined in this file, is derived from the simple_idct function - * from the libavcodec library part of the ffmpeg project. */ /* useful constants for the algorithm, they are save in __constant_ptr__ at */ @@ -80,7 +79,7 @@ simple_idct_ARM: __row_loop: - @@ read the row and check if it is null, almost null, or not, according to strongarm specs, it is not necessary to optimise ldr accesses (i.e. split 32bits in 2 16bits words), at least it gives more usable registers :) + @@ read the row and check if it is null, almost null, or not, according to strongarm specs, it is not necessary to optimize ldr accesses (i.e. split 32bits in 2 16bits words), at least it gives more usable registers :) ldr r1, [r14, #0] @ R1=(int32)(R12)[0]=ROWr32[0] (relative row cast to a 32b pointer) ldr r2, [r14, #4] @ R2=(int32)(R12)[1]=ROWr32[1] ldr r3, [r14, #8] @ R3=ROWr32[2] @@ -422,7 +421,7 @@ __end_a_evaluation2: @@ col[40] = ((a2 - b2) >> COL_SHIFT); @@ col[48] = ((a1 - b1) >> COL_SHIFT); @@ col[56] = ((a0 - b0) >> COL_SHIFT); - @@@@@ no optimisation here @@@@@ + @@@@@ no optimization here @@@@@ add r8, r6, r0 @ R8=a0+b0 add r9, r2, r1 @ R9=a1+b1 mov r8, r8, asr #COL_SHIFT |