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neon-implementation for rescaler code

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It's better to stay with a 32b fixed-point precision overall, otherwise
the C-version on ARM gets *slower*.
Actually, gcc ARM compiler optimizes some instructions pretty
well when WEBP_RESCALER_FIX is exactly 32, even in C.

Change-Id: I0eea97f7db5947470f5af355dee098eca81e178d
This commit is contained in:
skal
2015-10-05 11:26:52 +02:00
committed by Pascal Massimino
parent 6dfa5e3e58
commit b4e731cd93
7 changed files with 205 additions and 0 deletions
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Makefile.vc
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@ -207,6 +207,7 @@ DSP_DEC_OBJS = \
$(DIROBJ)\dsp\rescaler.obj \
$(DIROBJ)\dsp\rescaler_mips32.obj \
$(DIROBJ)\dsp\rescaler_mips_dsp_r2.obj \
$(DIROBJ)\dsp\rescaler_neon.obj \
$(DIROBJ)\dsp\rescaler_sse2.obj \
$(DIROBJ)\dsp\upsampling.obj \
$(DIROBJ)\dsp\upsampling_mips_dsp_r2.obj \