From: Ulrich Drepper <drepper@redhat.com>
Date: Tue, 25 Mar 1997 01:31:06 +0000 (+0000)
Subject: Rewritten.
X-Git-Tag: upstream/2.30~10627^2~3663
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=57a52ec851efbd87b6c85955fc96e350eda64e48;p=external%2Fglibc.git

Rewritten.
---

diff --git a/sysdeps/m68k/fpu/e_atan2.c b/sysdeps/m68k/fpu/e_atan2.c
index ae7a799..58d7555 100644
--- a/sysdeps/m68k/fpu/e_atan2.c
+++ b/sysdeps/m68k/fpu/e_atan2.c
@@ -1,2 +1,98 @@
-#define FUNC __ieee754_atan2
-#include <e_fmod.c>
+/* Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#define __LIBC_M81_MATH_INLINES
+#include <math.h>
+#include "math_private.h"
+
+#ifndef SUFF
+#define SUFF
+#endif
+#ifndef float_type
+#define float_type double
+#endif
+
+#define __CONCATX(a,b) __CONCAT(a,b)
+
+float_type
+__CONCATX(__ieee754_atan2,SUFF) (float_type y, float_type x)
+{
+  float_type pi, pi_2, z;
+
+  __asm ("fmovecr%.x %#0, %0" : "=f" (pi));
+  __asm ("fscale%.w %#-1, %0" : "=f" (pi_2) : "0" (pi));
+  if (x != x || y != y)
+    z = x + y;
+  else if (y == 0)
+    {
+      if (signbit (x))
+	z = signbit (y) ? -pi : pi;
+      else
+	z = y;
+    }
+  else if (__m81_u(__CONCATX(__isinf,SUFF)) (x))
+    {
+      if (__m81_u(__CONCATX(__isinf,SUFF)) (y))
+	{
+	  float_type pi_4;
+	  __asm ("fscale%.w %#-1, %0" : "=f" (pi_4) : "0" (pi_2));
+	  z = x > 0 ? pi_4 : 3 * pi_4;
+	}
+      else
+	z = x > 0 ? 0 : pi;
+      if (signbit (y))
+	z = -z;
+    }
+  else if (__m81_u(__CONCATX(__isinf,SUFF)) (y))
+    z = y > 0 ? pi_2 : -pi_2;
+  else if (x > 0)
+    {
+      if (y > 0)
+	{
+	  if (x > y)
+	    z = __m81_u(__CONCATX(__atan,SUFF)) (y / x);
+	  else
+	    z = pi_2 - __m81_u(__CONCATX(__atan,SUFF)) (x / y);
+	}
+      else
+	{
+	  if (x > -y)
+	    z = __m81_u(__CONCATX(__atan,SUFF)) (y / x);
+	  else
+	    z = -pi_2 - __m81_u(__CONCATX(__atan,SUFF)) (x / y);
+	}
+    }
+  else
+    {
+      if (y < 0)
+	{
+	  if (-x > y)
+	    z = -pi + __m81_u(__CONCATX(__atan,SUFF)) (y / x);
+	  else
+	    z = -pi_2 - __m81_u(__CONCATX(__atan,SUFF)) (x / y);
+	}
+      else
+	{
+	  if (-x > y)
+	    z = pi + __m81_u(__CONCATX(__atan,SUFF)) (y / x);
+	  else
+	    z = pi_2 - __m81_u(__CONCATX(__atan,SUFF)) (x / y);
+	}
+    }
+  return z;
+}
diff --git a/sysdeps/m68k/fpu/e_atan2f.c b/sysdeps/m68k/fpu/e_atan2f.c
index a4c5ebd..a0c750a 100644
--- a/sysdeps/m68k/fpu/e_atan2f.c
+++ b/sysdeps/m68k/fpu/e_atan2f.c
@@ -1,2 +1,3 @@
-#define FUNC __ieee754_atan2f
-#include <e_fmodf.c>
+#define SUFF f
+#define float_type float
+#include <e_atan2.c>
diff --git a/sysdeps/m68k/fpu/e_atan2l.c b/sysdeps/m68k/fpu/e_atan2l.c
index 0d43a77..426ca94 100644
--- a/sysdeps/m68k/fpu/e_atan2l.c
+++ b/sysdeps/m68k/fpu/e_atan2l.c
@@ -1,2 +1,3 @@
-#define FUNC __ieee754_atan2l
-#include <e_fmodl.c>
+#define SUFF l
+#define float_type long double
+#include <e_atan2.c>
diff --git a/sysdeps/m68k/fpu/e_pow.c b/sysdeps/m68k/fpu/e_pow.c
index 29798a1..970e8b8 100644
--- a/sysdeps/m68k/fpu/e_pow.c
+++ b/sysdeps/m68k/fpu/e_pow.c
@@ -1,2 +1,135 @@
-#define FUNC __ieee754_pow
-#include <e_fmod.c>
+/* Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#define __LIBC_M81_MATH_INLINES
+#include <math.h>
+#include "math_private.h"
+
+#ifndef SUFF
+#define SUFF
+#endif
+#ifndef float_type
+#define float_type double
+#endif
+
+#define __CONCATX(a,b) __CONCAT(a,b)
+
+float_type
+__CONCATX(__ieee754_pow,SUFF) (float_type x, float_type y)
+{
+  float_type z;
+  float_type ax;
+
+  if (y == 0.0)
+    return 1.0;
+  if (x != x || y != y)
+    return x + y;
+
+  if (__m81_u(__CONCATX(__isinf,SUFF)) (y))
+    {
+      ax = __CONCATX(fabs,SUFF) (x);
+      if (ax == 1)
+	return y - y;
+      if (ax > 1)
+	return y > 0 ? y : 0;
+      else
+	return y < 0 ? -y : 0;
+    }
+
+  if (__CONCATX(fabs,SUFF) (y) == 1)
+    return y > 0 ? x : 1 / x;
+
+  if (y == 2)
+    return x * x;
+  if (y == 0 && x >= 0)
+    return __m81_u(__CONCATX(__ieee754_sqrt,SUFF)) (x);
+
+  if (x == 10.0)
+    {
+      __asm ("ftentox%.x %1, %0" : "=f" (z) : "f" (y));
+      return z;
+    }
+  if (x == 2.0)
+    {
+      __asm ("ftwotox%.x %1, %0" : "=f" (z) : "f" (y));
+      return z;
+    }
+
+  ax = __CONCATX(fabs,SUFF) (x);
+  if (__m81_u(__CONCATX(__isinf,SUFF)) (x) || x == 0 || ax == 1)
+    {
+      z = ax;
+      if (y < 0)
+	z = 1 / z;
+      if (signbit (x))
+	{
+	  float_type temp = __m81_u (__CONCATX(__rint,SUFF)) (y);
+	  if (y != temp)
+	    {
+	      if (x == -1)
+		z = (z - z) / (z - z);
+	    }
+	  else
+	    {
+	      if (sizeof (float_type) == sizeof (float))
+		{
+		  long i = (long) y;
+		  if (i & 1)
+		    z = -z;
+		}
+	      else
+		{
+		  long long i = (long long) y;
+		  if ((float_type) i == y && i & 1)
+		    z = -z;
+		}
+	    }
+	}
+      return z;
+    }
+
+  if (x < 0.0)
+    {
+      float_type temp = __m81_u (__CONCATX(__rint,SUFF)) (y);
+      if (y == temp)
+	{
+	  long long i = (long long) y;
+	  z = (__m81_u(__CONCATX(__ieee754_exp,SUFF))
+	       (y * __m81_u(__CONCATX(__ieee754_log,SUFF)) (-x)));
+	  if (sizeof (float_type) == sizeof (float))
+	    {
+	      long i = (long) y;
+	      if (i & 1)
+		z = -z;
+	    }
+	  else
+	    {
+	      /* If the conversion to long long was inexact assume that y
+		 is an even integer.  */
+	      if ((float_type) i == y && i & 1)
+		z = -z;
+	    }
+	}
+      else
+	z = (x - x) / (x - x);
+    }
+  else
+    z = (__m81_u(__CONCATX(__ieee754_exp,SUFF))
+	 (y * __m81_u(__CONCATX(__ieee754_log,SUFF)) (x)));
+  return z;
+}
diff --git a/sysdeps/m68k/fpu/e_powf.c b/sysdeps/m68k/fpu/e_powf.c
index 978d32e..3790143 100644
--- a/sysdeps/m68k/fpu/e_powf.c
+++ b/sysdeps/m68k/fpu/e_powf.c
@@ -1,2 +1,3 @@
-#define FUNC __ieee754_powf
-#include <e_fmodf.c>
+#define SUFF f
+#define float_type float
+#include <e_pow.c>
diff --git a/sysdeps/m68k/fpu/e_powl.c b/sysdeps/m68k/fpu/e_powl.c
index 0feec54..f71fa34 100644
--- a/sysdeps/m68k/fpu/e_powl.c
+++ b/sysdeps/m68k/fpu/e_powl.c
@@ -1,2 +1,3 @@
-#define FUNC __ieee754_powl
-#include <e_fmodl.c>
+#define SUFF l
+#define float_type long double
+#include <e_pow.c>