diff options
Diffstat (limited to 'system/mmx/pixel_gain.s')
| -rw-r--r-- | system/mmx/pixel_gain.s | 83 |
1 files changed, 0 insertions, 83 deletions
diff --git a/system/mmx/pixel_gain.s b/system/mmx/pixel_gain.s deleted file mode 100644 index 5cd5057..0000000 --- a/system/mmx/pixel_gain.s +++ /dev/null @@ -1,83 +0,0 @@ -# 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_gain -.type pixel_gain,@function - -# mmx rgba pixel gain -# void asmtest(char *pixelarray, int32 nbpixels, int *rgba_gain) -# gains are 7.9 fixed point for rgba - -pixel_gain: - pushl %ebp - movl %esp, %ebp - push %esi - push %edi - - movl 8(%ebp), %esi # pixel array offset - movl 12(%ebp), %ecx # nb of elements - movl 16(%ebp), %edi # int16[4] array of gains - - prefetch (%esi) - - emms - sarl $2, %ecx # process 4 pixels per loop iteration - jz .exit - movq (%edi), %mm7 # read gain array from memory - jmp .loop_gain - - .align 16 - .loop_gain: - - prefetch 128(%esi) - movq (%esi), %mm5 # load pixel 1-2 from memory - movq 8(%esi), %mm6 # load pixel 3-4 from memory - pxor %mm0, %mm0 # zero mm0 - mm3 - pxor %mm1, %mm1 - pxor %mm2, %mm2 - pxor %mm3, %mm3 - punpcklbw %mm5, %mm0 # unpack 1st pixel into 8.8 bit ints - punpckhbw %mm5, %mm1 # unpack 2nd - punpcklbw %mm6, %mm2 # unpack 3rd - punpckhbw %mm6, %mm3 # unpack 4th - psrlw $0x1, %mm0 # shift right to clear sign bit 9.7 - psrlw $0x1, %mm1 - psrlw $0x1, %mm2 - psrlw $0x1, %mm3 - - pmulhw %mm7, %mm0 # multiply 1st pixel 9.7 * 7.9 -> 16.0 - pmulhw %mm7, %mm1 # multiply 2nd - pmulhw %mm7, %mm2 # multiply 3rd - pmulhw %mm7, %mm3 # multiply 4th - - packuswb %mm1, %mm0 # pack & saturate to 8bit vector - movq %mm0, (%esi) # store result in memory - packuswb %mm3, %mm2 # pack & saturate to 8bit vector - movq %mm2, 8(%esi) # store result in memory - - addl $16, %esi # increment source pointer - decl %ecx - jnz .loop_gain # loop - - .exit: - emms - - pop %edi - pop %esi - leave - ret - |