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https://github.com/jerryscript-project/jerryscript.git
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3ba286f3e1
* Rename modified fdlibm to jerry-libm
* Move third-party/fdlibm to jerry-libm
* Rename original fdlibm.h to jerry-libm-internal.h
* And remove it from the public headers.
* Rename jerry-libm's public header to math.h
* This also makes jerry-core sources include `<math.h>`. Therefore,
should anyone want to use a different libm implementation with
jerry, it becomes possible. (The same way as we provide a minimal
libc with standard headers, but should it be insufficient or
conflicting for someone, it can be replaced.)
* Drop `s_` prefix from jerry-libm sources
* The original fdlibm implementation had various prefixes (e.g., `k_`
for sources of kernel routines, and `w_` for wrapper routines), but
after the specialization of fdlibm to jerry, only `s_` remained.
Since it does not encode anything anymore, it can be dropped.
* Stylistic edits to jerry-libm's CMakeLists
* Align project name with other CMakeLists in the code base
* Move Jerry-LibM under Apache License
* Using the same approach as was used by linux-wireless when ath5k
driver license needed clarification. Solution was proposed by SFLC.
External mail for future reference: http://lwn.net/Articles/247806/
* Tests & checks
* Remove FD from the name of libm unit test-related files
* Make vera++ and cppcheck check jerry-libm
* Targets
* Speculative update of targets to use jerry-libm
JerryScript-DCO-1.0-Signed-off-by: Akos Kiss akiss@inf.u-szeged.hu
131 lines
2.7 KiB
C
131 lines
2.7 KiB
C
/* Copyright 2016 Samsung Electronics Co., Ltd.
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* Copyright 2016 University of Szeged
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* This file is based on work under the following copyright and permission
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* notice:
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*
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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*
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* Developed at SunSoft, a Sun Microsystems, Inc. business.
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* Permission to use, copy, modify, and distribute this
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* software is freely granted, provided that this notice
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* is preserved.
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*
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* @(#)s_ceil.c 1.3 95/01/18
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*/
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#include "jerry-libm-internal.h"
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/* ceil(x)
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* Return x rounded toward -inf to integral value
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*
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* Method:
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* Bit twiddling.
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*
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* Exception:
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* Inexact flag raised if x not equal to ceil(x).
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*/
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#define huge 1.0e300
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double
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ceil (double x)
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{
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int i0, i1, j0;
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unsigned i, j;
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i0 = __HI (x);
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i1 = __LO (x);
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j0 = ((i0 >> 20) & 0x7ff) - 0x3ff;
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if (j0 < 20)
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{
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if (j0 < 0) /* raise inexact if x != 0 */
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{
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if (huge + x > 0.0) /* return 0 * sign(x) if |x| < 1 */
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{
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if (i0 < 0)
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{
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i0 = 0x80000000;
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i1 = 0;
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}
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else if ((i0 | i1) != 0)
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{
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i0 = 0x3ff00000;
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i1 = 0;
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}
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}
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}
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else
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{
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i = (0x000fffff) >> j0;
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if (((i0 & i) | i1) == 0) /* x is integral */
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{
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return x;
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}
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if (huge + x > 0.0) /* raise inexact flag */
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{
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if (i0 > 0)
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{
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i0 += (0x00100000) >> j0;
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}
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i0 &= (~i);
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i1 = 0;
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}
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}
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}
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else if (j0 > 51)
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{
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if (j0 == 0x400) /* inf or NaN */
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{
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return x + x;
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}
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else /* x is integral */
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{
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return x;
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}
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}
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else
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{
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i = ((unsigned) (0xffffffff)) >> (j0 - 20);
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if ((i1 & i) == 0) /* x is integral */
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{
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return x;
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}
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if (huge + x > 0.0) /* raise inexact flag */
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{
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if (i0 > 0)
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{
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if (j0 == 20)
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{
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i0 += 1;
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}
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else
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{
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j = i1 + (1 << (52 - j0));
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if (j < i1) /* got a carry */
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{
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i0 += 1;
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}
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i1 = j;
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}
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}
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i1 &= (~i);
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}
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}
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__HI (x) = i0;
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__LO (x) = i1;
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return x;
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} /* ceil */
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