From b694c274836ac8b04d644711ac324eac2e9ab83e Mon Sep 17 00:00:00 2001
From: Hans-Christoph Steiner <eighthave@users.sourceforge.net>
Date: Fri, 16 Dec 2005 01:05:40 +0000
Subject: checking in pdp 0.12.4 from
 http://zwizwa.fartit.com/pd/pdp/pdp-0.12.4.tar.gz

svn path=/trunk/externals/pdp/; revision=4232
---
 system/mmx/pixel_conv_ver_s16.s | 128 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 128 insertions(+)
 create mode 100644 system/mmx/pixel_conv_ver_s16.s

(limited to 'system/mmx/pixel_conv_ver_s16.s')

diff --git a/system/mmx/pixel_conv_ver_s16.s b/system/mmx/pixel_conv_ver_s16.s
new file mode 100644
index 0000000..ae2456f
--- /dev/null
+++ b/system/mmx/pixel_conv_ver_s16.s
@@ -0,0 +1,128 @@
+#    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.
+#
+#TODO:	 fix out of bound acces in conv_ver and conv_hor
+	
+	# intermediate function
+	
+	# input in register:	
+	# %mm0:	top 4 pixels
+	# %mm1:	middle 4 pixels
+	# %mm2:	bottom 4 pixels
+
+	# %mm5:	top 4 pixel mask
+	# %mm6:	middle 4 pixel mask
+	# %mm7:	bottom 4 pixel mask
+	
+	# return in register:	 
+	# %mm0:	middle 4 pixels result
+
+	
+	.conv_ver_4_pixels:	
+	.align 16
+	
+	# compute quadruplet
+
+	# get top pixel
+	pmulhw %mm5, %mm0
+	psllw $1, %mm0
+	
+	# get middle pixel
+	movq %mm1, %mm4
+	pmulhw %mm6, %mm4
+	psllw $1, %mm4
+	paddsw %mm4, %mm0
+
+	# get bottom pixel
+	movq %mm2, %mm3
+	pmulhw %mm7, %mm3
+	psllw $1, %mm3			# mm3 <- mm3/4
+	paddsw %mm3, %mm0
+
+	ret
+	
+.globl pixel_conv_ver_s16
+.type  pixel_conv_ver_s16,@function
+
+
+# pixel_conv_ver_s16(short int *pixel_array, int nb_4_pixel_vectors, int row_byte_size, short int border[4])
+# horizontal unsigned pixel conv (1/4 1/2 1/4) not tested
+# NOT TESTED
+
+	
+pixel_conv_ver_s16: 
+
+		
+	pushl %ebp
+	movl %esp, %ebp
+	push %esi
+	push %edi
+
+	movl 8(%ebp),  %esi		# pixel array offset
+	movl 12(%ebp), %ecx		# nb of 4 pixel vectors in a row (at least 2)
+	movl 16(%ebp), %edx		# rowsize in bytes
+
+	movl 24(%ebp), %edi		# mask vector
+	movq (%edi), %mm5
+	movq 8(%edi), %mm6
+	movq 16(%edi), %mm7
+	
+	movl 20(%ebp), %edi		# edge vector
+
+
+	shll $1, %edx
+	decl %ecx			# loop has a terminator stub
+	decl %ecx			# loop has another terminator stub
+	
+
+	movq (%edi), %mm0		# init regs (left edge, so mm0 is zero)
+	movq (%esi), %mm1
+	movq (%esi,%edx,1), %mm2
+	jmp .conv_line_loop
+
+
+	.align 16
+	.conv_line_loop:	
+	call .conv_ver_4_pixels		# compute conv 
+	movq %mm0, (%esi)		# store result
+	movq %mm1, %mm0			# mm0 <- prev (%esi)
+	movq %mm2, %mm1			# mm1 <- (%esi,%edx,1)
+	movq (%esi,%edx,2), %mm2	# mm2 <- (%esi,%edx,2)
+	
+	addl %edx, %esi			# increase pointer
+	decl %ecx
+	jnz .conv_line_loop
+
+	call .conv_ver_4_pixels		# compute conv 
+	movq %mm0, (%esi)		# store result
+	movq %mm1, %mm0			# mm0 <- prev (%esi)
+	movq %mm2, %mm1			# mm1 <- (%esi,%edx,1)
+	movq (%edi), %mm2		# clear invalid edge vector
+
+	addl %edx, %esi			# increase pointer
+	call .conv_ver_4_pixels		# compute last vector
+	movq %mm0, (%esi)		# store it
+	
+	emms
+	
+	pop %edi
+	pop %esi
+	leave
+	ret
+
+
+
-- 
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