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authorMåns Rullgård <mans@mansr.com>2009-10-06 21:55:35 +0000
committerMåns Rullgård <mans@mansr.com>2009-10-06 21:55:35 +0000
commit153f49570f41ebfffe8bb1fa9acb882bfe4eaf79 (patch)
treee565c74de2fc2ba2f6ae772537aed3dde2ce649d /libavcodec/arm/dsputil_armv6.S
parentc8315e918627edc9ba526a38b4d8ff82ec043ae3 (diff)
downloadffmpeg-153f49570f41ebfffe8bb1fa9acb882bfe4eaf79.tar.gz
ARM: ARMv6 optimised add_pixels_clamped()
Originally committed as revision 20184 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/arm/dsputil_armv6.S')
-rw-r--r--libavcodec/arm/dsputil_armv6.S50
1 files changed, 50 insertions, 0 deletions
diff --git a/libavcodec/arm/dsputil_armv6.S b/libavcodec/arm/dsputil_armv6.S
new file mode 100644
index 0000000000..c76d408809
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+++ b/libavcodec/arm/dsputil_armv6.S
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2009 Mans Rullgard <mans@mansr.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "asm.S"
+
+ .text
+
+function ff_add_pixels_clamped_armv6, export=1
+ push {r4-r8,lr}
+ mov r3, #8
+1:
+ ldm r0!, {r4,r5,r12,lr}
+ ldrd r6, r7, [r1]
+ pkhbt r8, r4, r5, lsl #16
+ pkhtb r5, r5, r4, asr #16
+ pkhbt r4, r12, lr, lsl #16
+ pkhtb lr, lr, r12, asr #16
+ pld [r1, r2]
+ uxtab16 r8, r8, r6
+ uxtab16 r5, r5, r6, ror #8
+ uxtab16 r4, r4, r7
+ uxtab16 lr, lr, r7, ror #8
+ usat16 r8, #8, r8
+ usat16 r5, #8, r5
+ usat16 r4, #8, r4
+ usat16 lr, #8, lr
+ orr r6, r8, r5, lsl #8
+ orr r7, r4, lr, lsl #8
+ subs r3, r3, #1
+ strd r6, r7, [r1], r2
+ bgt 1b
+ pop {r4-r8,pc}
+.endfunc