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-rw-r--r--sysdeps/m68k/fpu/e_scalb.c60
1 files changed, 60 insertions, 0 deletions
diff --git a/sysdeps/m68k/fpu/e_scalb.c b/sysdeps/m68k/fpu/e_scalb.c
new file mode 100644
index 0000000000..88edba1ca8
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+++ b/sysdeps/m68k/fpu/e_scalb.c
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+/* Copyright (C) 1997, 1999 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <math.h>
+#include "math_private.h"
+#include "mathimpl.h"
+
+#ifndef SUFF
+#define SUFF
+#endif
+#ifndef float_type
+#define float_type double
+#endif
+
+#define CONCATX(a,b) __CONCAT(a,b)
+#define s(name) CONCATX(name,SUFF)
+#define m81(func) __m81_u(s(func))
+
+float_type
+s(__ieee754_scalb) (float_type x, float_type fn)
+{
+ float_type retval;
+ unsigned long x_cond = __m81_test (x);
+ unsigned long fn_cond = __m81_test (fn);
+
+ if ((x_cond | fn_cond) & __M81_COND_NAN)
+ return x * fn;
+
+ if (fn_cond & __M81_COND_INF)
+ {
+ if (!(fn_cond & __M81_COND_NEG))
+ return x * fn;
+ else if (x_cond & __M81_COND_ZERO)
+ return x;
+ else
+ return x / -fn;
+ }
+
+ if (m81(__rint) (fn) != fn)
+ return (x - x) / (x - x);
+
+ __asm ("fscale%.x %1, %0" : "=f" (retval) : "f" (fn), "0" (x));
+ return retval;
+}