Changeset 516e780 in mainline for uspace/lib/c/include/fenv.h

Timestamp:

2018-08-31T11:55:41Z (6 years ago)

Author:

GitHub <noreply@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

fa86fff

Parents:

7f7d642

git-author:

Jiří Zárevúcky <zarevucky.jiri@…> (2018-08-31 11:55:41)

git-committer:

GitHub <noreply@…> (2018-08-31 11:55:41)

Message:

Strip down libmath. (#45)

libmath is mostly unused (except for trunc(), sin() and cos()), and most functions in it are either very imprecise or downright broken. Additionally, it is implemented in manner that conflicts with C standard. Instead of trying to fix all the shortcomings while maintaining unused functionality, I'm opting to simply remove most of it and only keep the parts that are currently necessary.

Later readdition of the removed functions is possible, but there needs to be a reliable way to evaluate their quality first.

File:

• uspace/lib/c/include/fenv.h (moved) (moved from uspace/lib/math/include/exp.h ) (2 diffs)

uspace/lib/c/include/fenv.h

@@ -1 +1 @@
 /*
- * Copyright (c) 2015 Jiri Svoboda
+ * Copyright (c) 2018 CZ.NIC, z.s.p.o.
  * All rights reserved.
  *
@@ -27 +27 @@
  */
 
-/** @addtogroup libmath
- * @{
- */
-/** @file
- */
+#ifndef _FENV_H
+#define _FENV_H
 
-#ifndef LIBMATH_EXP_H_
-#define LIBMATH_EXP_H_
+// TODO
 
-#include <mathtypes.h>
+#define FE_TOWARDZERO  0
+#define FE_TONEAREST   1
+#define FE_UPWARD      2
+#define FE_DOWNWARD    3
 
-extern float32_t float32_exp(float32_t);
-extern float64_t float64_exp(float64_t);
+#define fegetround() FE_TONEAREST
 
 #endif
 
-/** @}
- */