diff options
Diffstat (limited to 'system/mmx/pixel_add_s16.s')
| -rw-r--r-- | system/mmx/pixel_add_s16.s | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/system/mmx/pixel_add_s16.s b/system/mmx/pixel_add_s16.s new file mode 100644 index 0000000..8d4c7df --- /dev/null +++ b/system/mmx/pixel_add_s16.s @@ -0,0 +1,55 @@ +# 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_add_s16 +.type pixel_add_s16,@function + +# simple add +# void pixel_add_s16(int *left, int *right, int nb_4pixel_vectors) + +pixel_add_s16: + pushl %ebp + movl %esp, %ebp + push %esi + push %edi + + movl 8(%ebp), %edi # left array + movl 12(%ebp), %esi # right array + movl 16(%ebp), %ecx # pixel count + + + .align 16 + .loop_mix: + +# prefetch 128(%esi) + movq (%esi), %mm1 # load right 4 pixels from memory + movq (%edi), %mm0 # load 4 left pixels from memory + paddsw %mm1, %mm0 # mix + movq %mm0, (%edi) + addl $8, %esi + addl $8, %edi + decl %ecx + jnz .loop_mix # loop + + emms + + + pop %edi + pop %esi + leave + ret + |