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configure: test for -msse2

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+ add a WEBP_HAVE_SSE2 to dsp.h

not all 32-bit toolchain configurations will have sse2 enabled by
default

Change-Id: I7c675e511581f93cf55c79f960fa7efa2df4987e
This commit is contained in:
James Zern
2014-06-07 19:44:08 -07:00
parent b9d2efc629
commit 6e61a3a905
3 changed files with 29 additions and 8 deletions
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6
src/dsp/dsp.h
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@ -40,7 +40,11 @@ extern "C" {
#define WEBP_MSC_SSE2 // Visual C++ SSE2 targets
#endif
#if defined(__SSE2__) || defined(WEBP_MSC_SSE2)
// WEBP_HAVE_* are used to indicate the presence of the instruction set in dsp
// files without intrinsics, allowing the corresponding Init() to be called.
// Files containing intrinsics will need to be built targeting the instruction
// set so should succeed on one of the earlier tests.
#if defined(__SSE2__) || defined(WEBP_MSC_SSE2) || defined(WEBP_HAVE_SSE2)
#define WEBP_USE_SSE2
#endif