Implement remainderl() as a wrapper around remquol(). The extra work

remquol() performs to compute the quotient is negligible.

2 files changed, 44 insertions, 0 deletions

diff --git a/lib/msun/src/e_remainder.c b/lib/msun/src/e_remainder.c
index 2d285d6..9be513b 100644
--- a/lib/msun/src/e_remainder.c
+++ b/lib/msun/src/e_remainder.c
@@ -23,6 +23,8 @@ __FBSDID("$FreeBSD$");
  *	Based on fmod() return x-[x/p]chopped*p exactlp.
  */
 
+#include <float.h>
+
 #include "math.h"
 #include "math_private.h"
 
@@ -71,3 +73,7 @@ __ieee754_remainder(double x, double p)
 	SET_HIGH_WORD(x,hx^sx);
 	return x;
 }
+
+#if LDBL_MANT_DIG == 53
+__weak_reference(remainder, remainderl);
+#endif
diff --git a/lib/msun/src/e_remainderl.c b/lib/msun/src/e_remainderl.c
new file mode 100644
index 0000000..03327b8
--- /dev/null
+++ b/lib/msun/src/e_remainderl.c
@@ -0,0 +1,38 @@
+/*-
+ * Copyright (c) 2008 David Schultz <das@FreeBSD.ORG>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <math.h>
+
+long double
+remainderl(long double x, long double y)
+{
+	int quo;
+
+	return (remquol(x, y, &quo));
+}