diff options
author | Tom Schouten <doelie@users.sourceforge.net> | 2003-01-21 10:27:33 +0000 |
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committer | Tom Schouten <doelie@users.sourceforge.net> | 2003-01-21 10:27:33 +0000 |
commit | 9b8745d5250c9d0b60c9aa5a77f58a3fcddf1076 (patch) | |
tree | 8372b6a414a7124cec57efc9c80845e2bc1b157d /system/mmx/pixel_unpack_u8s16.s |
This commit was generated by cvs2svn to compensate for changes in r352,svn2git-root
which included commits to RCS files with non-trunk default branches.
svn path=/trunk/externals/pdp/; revision=353
Diffstat (limited to 'system/mmx/pixel_unpack_u8s16.s')
-rw-r--r-- | system/mmx/pixel_unpack_u8s16.s | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/system/mmx/pixel_unpack_u8s16.s b/system/mmx/pixel_unpack_u8s16.s new file mode 100644 index 0000000..0fc14c2 --- /dev/null +++ b/system/mmx/pixel_unpack_u8s16.s @@ -0,0 +1,113 @@ +# Pure Data Packet mmx routine. +# Copyright (c) by Tom Schouten <pdp@zzz.kotnet.org> +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program 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 General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +# +.globl pixel_unpack_u8s16_y +.type pixel_unpack_u8s16_y,@function + +# mmx rgba pixel gain +# void pixel_unpack_u8s16_y(char *input, char *output, int32 nb_pixels_div8) + +pixel_unpack_u8s16_y: + pushl %ebp + movl %esp, %ebp + push %esi + push %edi + +# movl 20(%ebp), %edi # int16[4] array of gains +# movq (%edi), %mm7 # get gain array + + movl 8(%ebp), %esi # input uint8 pixel array + movl 12(%ebp), %edi # output sint16 pixel array + movl 16(%ebp), %ecx # nb of elements div 8 + + + .align 16 + .loop_unpack_y: + + movq (%esi), %mm5 # load 8 pixels from memory + pxor %mm0, %mm0 # zero mm0 - mm3 + pxor %mm1, %mm1 + punpcklbw %mm5, %mm0 # unpack 1st 4 pixels + punpckhbw %mm5, %mm1 # unpack 2nd 4 pixles + psrlw $0x1, %mm0 # shift right to clear sign bit 9.7 + psrlw $0x1, %mm1 +# pmulhw %mm7, %mm0 # apply gain +# pmulhw %mm7, %mm1 +# paddsw %mm0, %mm0 # correct factor 2 +# paddsw %mm1, %mm1 + movq %mm0, (%edi) # store + movq %mm1, 8(%edi) + + addl $8, %esi # increment source pointer + addl $16, %edi # increment dest pointer + decl %ecx + jnz .loop_unpack_y # loop + + emms + + pop %edi + pop %esi + leave + ret + +.globl pixel_unpack_u8s16_uv +.type pixel_unpack_u8s16_uv,@function +pixel_unpack_u8s16_uv: + pushl %ebp + movl %esp, %ebp + push %esi + push %edi + +# movl 20(%ebp), %edi # int16[4] array of gains +# movq (%edi), %mm7 # get gain array + + movl 8(%ebp), %esi # input uint8 pixel array + movl 12(%ebp), %edi # output sint16 pixel array + movl 16(%ebp), %ecx # nb of elements div 8 + + pcmpeqw %mm6, %mm6 + psllw $15, %mm6 + + .align 16 + .loop_unpack_uv: + + movq (%esi), %mm5 # load 8 pixels from memory + pxor %mm0, %mm0 # zero mm0 - mm3 + pxor %mm1, %mm1 + punpcklbw %mm5, %mm0 # unpack 1st 4 pixels + punpckhbw %mm5, %mm1 # unpack 2nd 4 pixles + pxor %mm6, %mm0 # flip sign bit (Cr and Cb are ofset by 128) + pxor %mm6, %mm1 +# pmulhw %mm7, %mm0 # apply gain +# pmulhw %mm7, %mm1 +# paddsw %mm0, %mm0 # correct factor 2 +# paddsw %mm1, %mm1 + movq %mm0, (%edi) # store + movq %mm1, 8(%edi) + + addl $8, %esi # increment source pointer + addl $16, %edi # increment dest pointer + decl %ecx + jnz .loop_unpack_uv # loop + + emms + + pop %edi + pop %esi + leave + ret + |