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authorTom Schouten <doelie@users.sourceforge.net>2003-01-21 10:27:33 +0000
committerTom Schouten <doelie@users.sourceforge.net>2003-01-21 10:27:33 +0000
commit9b8745d5250c9d0b60c9aa5a77f58a3fcddf1076 (patch)
tree8372b6a414a7124cec57efc9c80845e2bc1b157d /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')
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diff --git a/system/mmx/pixel_unpack_u8s16.s b/system/mmx/pixel_unpack_u8s16.s
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+# 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
+