| 1 | /*
|
|---|
| 2 | * Copyright (c) 2015 Jiri Svoboda
|
|---|
| 3 | * All rights reserved.
|
|---|
| 4 | *
|
|---|
| 5 | * Redistribution and use in source and binary forms, with or without
|
|---|
| 6 | * modification, are permitted provided that the following conditions
|
|---|
| 7 | * are met:
|
|---|
| 8 | *
|
|---|
| 9 | * - Redistributions of source code must retain the above copyright
|
|---|
| 10 | * notice, this list of conditions and the following disclaimer.
|
|---|
| 11 | * - Redistributions in binary form must reproduce the above copyright
|
|---|
| 12 | * notice, this list of conditions and the following disclaimer in the
|
|---|
| 13 | * documentation and/or other materials provided with the distribution.
|
|---|
| 14 | * - The name of the author may not be used to endorse or promote products
|
|---|
| 15 | * derived from this software without specific prior written permission.
|
|---|
| 16 | *
|
|---|
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|---|
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|---|
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|---|
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|---|
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|---|
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|---|
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|---|
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|---|
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|---|
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|---|
| 27 | */
|
|---|
| 28 |
|
|---|
| 29 | /** @addtogroup libmath
|
|---|
| 30 | * @{
|
|---|
| 31 | */
|
|---|
| 32 | /** @file
|
|---|
| 33 | */
|
|---|
| 34 |
|
|---|
| 35 | #include <math.h>
|
|---|
| 36 | #include <modf.h>
|
|---|
| 37 |
|
|---|
| 38 | /** Remainder function (32-bit floating point)
|
|---|
| 39 | *
|
|---|
| 40 | * Calculate the modulo of dividend by divisor.
|
|---|
| 41 | *
|
|---|
| 42 | * This is a very basic implementation that uses
|
|---|
| 43 | * division and multiplication (instead of exact
|
|---|
| 44 | * arithmetics). Thus the result might be very
|
|---|
| 45 | * imprecise (depending on the magnitude of the
|
|---|
| 46 | * arguments).
|
|---|
| 47 | *
|
|---|
| 48 | * @param dividend Dividend.
|
|---|
| 49 | * @param divisor Divisor.
|
|---|
| 50 | *
|
|---|
| 51 | * @return Modulo.
|
|---|
| 52 | *
|
|---|
| 53 | */
|
|---|
| 54 | float32_t float32_modf(float32_t value, float32_t *iptr)
|
|---|
| 55 | {
|
|---|
| 56 | *iptr = trunc_f32(value);
|
|---|
| 57 | return value - *iptr;
|
|---|
| 58 | }
|
|---|
| 59 |
|
|---|
| 60 | /** Remainder function (64-bit floating point)
|
|---|
| 61 | *
|
|---|
| 62 | * Calculate the modulo of dividend by divisor.
|
|---|
| 63 | *
|
|---|
| 64 | * This is a very basic implementation that uses
|
|---|
| 65 | * division and multiplication (instead of exact
|
|---|
| 66 | * arithmetics). Thus the result might be very
|
|---|
| 67 | * imprecise (depending on the magnitude of the
|
|---|
| 68 | * arguments).
|
|---|
| 69 | *
|
|---|
| 70 | * @param dividend Dividend.
|
|---|
| 71 | * @param divisor Divisor.
|
|---|
| 72 | *
|
|---|
| 73 | * @return Modulo.
|
|---|
| 74 | *
|
|---|
| 75 | */
|
|---|
| 76 | float64_t float64_modf(float64_t value, float64_t *iptr)
|
|---|
| 77 | {
|
|---|
| 78 | *iptr = trunc_f64(value);
|
|---|
| 79 | return value - *iptr;
|
|---|
| 80 | }
|
|---|
| 81 |
|
|---|
| 82 | /** @}
|
|---|
| 83 | */
|
|---|
