From 9b8745d5250c9d0b60c9aa5a77f58a3fcddf1076 Mon Sep 17 00:00:00 2001 From: Tom Schouten Date: Tue, 21 Jan 2003 10:27:33 +0000 Subject: This commit was generated by cvs2svn to compensate for changes in r352, which included commits to RCS files with non-trunk default branches. svn path=/trunk/externals/pdp/; revision=353 --- system/mmx/pixel_affine_s16.s | 59 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 system/mmx/pixel_affine_s16.s (limited to 'system/mmx/pixel_affine_s16.s') diff --git a/system/mmx/pixel_affine_s16.s b/system/mmx/pixel_affine_s16.s new file mode 100644 index 0000000..b357de3 --- /dev/null +++ b/system/mmx/pixel_affine_s16.s @@ -0,0 +1,59 @@ +# Pure Data Packet mmx routine. +# Copyright (c) by Tom Schouten +# +# 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_affine_s16 +.type pixel_affine_s16,@function + +# void pixel_affine_s16(int *buf, int nb_8pixel_vectors, short int gain[4], short int offset[4]) + +pixel_affine_s16: + pushl %ebp + movl %esp, %ebp + push %esi + push %edi + + movl 20(%ebp), %edi + movq (%edi), %mm6 # get offset vector + + movl 16(%ebp), %edi + movq (%edi), %mm7 # get gain vector + + movl 8(%ebp), %esi # input array + movl 12(%ebp), %ecx # pixel count + + + .align 16 + .loop_affine: + +# prefetch 128(%esi) + movq (%esi), %mm0 # load 4 pixels from memory + pmulhw %mm7, %mm0 # apply gain (s).15 fixed point + psllw $1, %mm0 # apply correction shift + paddsw %mm6, %mm0 # add offset + movq %mm0, (%esi) # store result in memory + + addl $8, %esi # increment source pointer + decl %ecx + jnz .loop_affine # loop + + emms + + pop %edi + pop %esi + leave + ret + -- cgit v1.2.1