Use lrintf to fast convert floats to ints when possible

CMakeLists.txt

@@ -258,7 +258,7 @@ ENDIF()
 CHECK_SYMBOL_EXISTS(aligned_alloc    stdlib.h HAVE_ALIGNED_ALLOC)
 CHECK_SYMBOL_EXISTS(posix_memalign   stdlib.h HAVE_POSIX_MEMALIGN)
 CHECK_SYMBOL_EXISTS(_aligned_malloc  malloc.h HAVE__ALIGNED_MALLOC)
-CHECK_SYMBOL_EXISTS(powf   math.h HAVE_POWF)
+CHECK_SYMBOL_EXISTS(lrintf math.h HAVE_LRINTF)
 CHECK_SYMBOL_EXISTS(powf   math.h HAVE_POWF)
 CHECK_SYMBOL_EXISTS(sqrtf  math.h HAVE_SQRTF)
 CHECK_SYMBOL_EXISTS(cosf   math.h HAVE_COSF)

OpenAL32/Include/alMain.h

@@ -5,6 +5,7 @@
 #include <stdio.h>
 #include <stdarg.h>
 #include <assert.h>
+#include <math.h>
 
 #ifdef HAVE_FENV_H
 #include <fenv.h>
@@ -406,19 +407,15 @@ static __inline ALuint NextPowerOf2(ALuint value)
  * mode. */
 static __inline ALint fastf2i(ALfloat f)
 {
+#ifdef HAVE_LRINTF
+    return lrintf(f);
+#elif defined(_MSC_VER) && defined(_M_IX86)
     ALint i;
-#if defined(_MSC_VER) && defined(_M_IX86)
     __asm fld f
     __asm fistp i
-#elif defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
-    __asm__ __volatile__("flds %1\n\t"
-                         "fistpl %0\n\t"
-                         : "=m" (i)
-                         : "m" (f));
 #else
-    i = (ALint)f;
+    return (ALint)f;
 #endif
-    return i;
 }
 
 /* Fast float-to-uint conversion. Assumes the FPU is already in round-to-zero

config.h.in

@@ -67,6 +67,9 @@
 /* Define if we have the stat function */
 #cmakedefine HAVE_STAT
 
+/* Define if we have the lrintf function */
+#cmakedefine HAVE_LRINTF
+
 /* Define if we have the powf function */
 #cmakedefine HAVE_POWF