2006-01-31 Richard Guenther <rguenther@suse.de>

[pf3gnuchains/gcc-fork.git] / libgcc-math / flt-32 / s_sinf.c

diff --git a/libgcc-math/flt-32/s_sinf.c b/libgcc-math/flt-32/s_sinf.c
new file mode 100644 (file)
index 0000000..76a7c21
--- /dev/null
+++ b/libgcc-math/flt-32/s_sinf.c
@@ -0,0 +1,54 @@
+/* s_sinf.c -- float version of s_sin.c.
+ * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
+ */
+
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunPro, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice 
+ * is preserved.
+ * ====================================================
+ */
+
+#if defined(LIBM_SCCS) && !defined(lint)
+static char rcsid[] = "$NetBSD: s_sinf.c,v 1.4 1995/05/10 20:48:16 jtc Exp $";
+#endif
+
+#include "math.h"
+#include "math_private.h"
+
+#ifdef __STDC__
+       float __sinf(float x)
+#else
+       float __sinf(x)
+       float x;
+#endif
+{
+       float y[2],z=0.0;
+       int32_t n, ix;
+
+       GET_FLOAT_WORD(ix,x);
+
+    /* |x| ~< pi/4 */
+       ix &= 0x7fffffff;
+       if(ix <= 0x3f490fd8) return __kernel_sinf(x,z,0);
+
+    /* sin(Inf or NaN) is NaN */
+       else if (ix>=0x7f800000) return x-x;
+
+    /* argument reduction needed */
+       else {
+           n = __ieee754_rem_pio2f(x,y);
+           switch(n&3) {
+               case 0: return  __kernel_sinf(y[0],y[1],1);
+               case 1: return  __kernel_cosf(y[0],y[1]);
+               case 2: return -__kernel_sinf(y[0],y[1],1);
+               default:
+                       return -__kernel_cosf(y[0],y[1]);
+           }
+       }
+}
+weak_alias (__sinf, sinf)