From cd159fd1ec8ae64e6cd1b69854034560b5f1c419 Mon Sep 17 00:00:00 2001
From: Jean-Marc Valin <jmvalin@jmvalin.ca>
Date: Sat, 13 Aug 2016 02:53:12 -0400
Subject: [PATCH] Making gcc use SSE directly for float->int conversion when
 available

---
 celt/float_cast.h | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/celt/float_cast.h b/celt/float_cast.h
index ed5a39b5..98b40abc 100644
--- 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