Blame Bug-fix-in-ssse3-quantize-function.patch
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commit 0d43bd77e5f429467fbd280a7b8f7fbc0bfe1809
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Author: Yunqing Wang <yunqingwang@google.com>
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Date: Fri Feb 7 14:27:07 2014 -0800
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Bug fix in ssse3 quantize function
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A bug was reported in Issue 702: "SIGILL (Illegal instruction) when
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transcoding with vp9 - using FFmpeg". It was reproduced and fixed.
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Change-Id: Ie32c149a89af02856084aeaf289e848a905c7700
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diff --git a/vp9/encoder/x86/vp9_quantize_ssse3.asm b/vp9/encoder/x86/vp9_quantize_ssse3.asm
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index db30660..48ccef8 100644
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--- a/vp9/encoder/x86/vp9_quantize_ssse3.asm
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+++ b/vp9/encoder/x86/vp9_quantize_ssse3.asm
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@@ -188,7 +188,8 @@ cglobal quantize_%1, 0, %2, 15, coeff, ncoeff, skip, zbin, round, quant, \
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pmaxsw m8, m7
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pshuflw m7, m8, 0x1
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pmaxsw m8, m7
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- pextrw [r2], m8, 0
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+ pextrw r6, m8, 0
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+ mov [r2], r6
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RET
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; skip-block, i.e. just write all zeroes
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@@ -214,5 +215,5 @@ cglobal quantize_%1, 0, %2, 15, coeff, ncoeff, skip, zbin, round, quant, \
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%endmacro
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INIT_XMM ssse3
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-QUANTIZE_FN b, 6
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+QUANTIZE_FN b, 7
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QUANTIZE_FN b_32x32, 7
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