shithub: opus

Info  •  Files  •  Log  •  Branches

Making gcc use SSE directly for float->int conversion when available

--- a/celt/float_cast.h

+++ b/celt/float_cast.h

@@ -61,7 +61,13 @@

 **      the config.h file.

 */

-#if (HAVE_LRINTF)

+/* With GCC, when SSE is available, the fastest conversion is cvtss2si. */

+#if defined(__GNUC__) && defined(__SSE__)

+

+#include <xmmintrin.h>

+static OPUS_INLINE opus_int32 float2int(float x) {return _mm_cvt_ss2si(_mm_set_ss(x));}

+

+#elif defined(HAVE_LRINTF)

 /*      These defines enable functionality introduced with the 1999 ISO C

 **      standard. They must be defined before the inclusion of math.h to