| s_csqrtl.c (181402) | s_csqrtl.c (275819) |
|---|---|
| 1/*- 2 * Copyright (c) 2007-2008 David Schultz <das@FreeBSD.ORG> 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 * 1. Redistributions of source code must retain the above copyright --- 11 unchanged lines hidden (view full) --- 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> | 1/*- 2 * Copyright (c) 2007-2008 David Schultz <das@FreeBSD.ORG> 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 * 1. Redistributions of source code must retain the above copyright --- 11 unchanged lines hidden (view full) --- 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> |
| 28__FBSDID("$FreeBSD: head/lib/msun/src/s_csqrtl.c 181402 2008-08-08 00:15:16Z das $"); | 28__FBSDID("$FreeBSD: head/lib/msun/src/s_csqrtl.c 275819 2014-12-16 09:21:56Z ed $"); |
| 29 30#include <complex.h> 31#include <float.h> 32#include <math.h> 33 34#include "math_private.h" 35 36/* --- 16 unchanged lines hidden (view full) --- 53 long double t; 54 int scale; 55 56 a = creall(z); 57 b = cimagl(z); 58 59 /* Handle special cases. */ 60 if (z == 0) | 29 30#include <complex.h> 31#include <float.h> 32#include <math.h> 33 34#include "math_private.h" 35 36/* --- 16 unchanged lines hidden (view full) --- 53 long double t; 54 int scale; 55 56 a = creall(z); 57 b = cimagl(z); 58 59 /* Handle special cases. */ 60 if (z == 0) |
| 61 return (cpackl(0, b)); | 61 return (CMPLXL(0, b)); |
| 62 if (isinf(b)) | 62 if (isinf(b)) |
| 63 return (cpackl(INFINITY, b)); | 63 return (CMPLXL(INFINITY, b)); |
| 64 if (isnan(a)) { 65 t = (b - b) / (b - b); /* raise invalid if b is not a NaN */ | 64 if (isnan(a)) { 65 t = (b - b) / (b - b); /* raise invalid if b is not a NaN */ |
| 66 return (cpackl(a, t)); /* return NaN + NaN i */ | 66 return (CMPLXL(a, t)); /* return NaN + NaN i */ |
| 67 } 68 if (isinf(a)) { 69 /* 70 * csqrt(inf + NaN i) = inf + NaN i 71 * csqrt(inf + y i) = inf + 0 i 72 * csqrt(-inf + NaN i) = NaN +- inf i 73 * csqrt(-inf + y i) = 0 + inf i 74 */ 75 if (signbit(a)) | 67 } 68 if (isinf(a)) { 69 /* 70 * csqrt(inf + NaN i) = inf + NaN i 71 * csqrt(inf + y i) = inf + 0 i 72 * csqrt(-inf + NaN i) = NaN +- inf i 73 * csqrt(-inf + y i) = 0 + inf i 74 */ 75 if (signbit(a)) |
| 76 return (cpackl(fabsl(b - b), copysignl(a, b))); | 76 return (CMPLXL(fabsl(b - b), copysignl(a, b))); |
| 77 else | 77 else |
| 78 return (cpackl(a, copysignl(b - b, b))); | 78 return (CMPLXL(a, copysignl(b - b, b))); |
| 79 } 80 /* 81 * The remaining special case (b is NaN) is handled just fine by 82 * the normal code path below. 83 */ 84 85 /* Scale to avoid overflow. */ 86 if (fabsl(a) >= THRESH || fabsl(b) >= THRESH) { 87 a *= 0.25; 88 b *= 0.25; 89 scale = 1; 90 } else { 91 scale = 0; 92 } 93 94 /* Algorithm 312, CACM vol 10, Oct 1967. */ 95 if (a >= 0) { 96 t = sqrtl((a + hypotl(a, b)) * 0.5); | 79 } 80 /* 81 * The remaining special case (b is NaN) is handled just fine by 82 * the normal code path below. 83 */ 84 85 /* Scale to avoid overflow. */ 86 if (fabsl(a) >= THRESH || fabsl(b) >= THRESH) { 87 a *= 0.25; 88 b *= 0.25; 89 scale = 1; 90 } else { 91 scale = 0; 92 } 93 94 /* Algorithm 312, CACM vol 10, Oct 1967. */ 95 if (a >= 0) { 96 t = sqrtl((a + hypotl(a, b)) * 0.5); |
| 97 result = cpackl(t, b / (2 * t)); | 97 result = CMPLXL(t, b / (2 * t)); |
| 98 } else { 99 t = sqrtl((-a + hypotl(a, b)) * 0.5); | 98 } else { 99 t = sqrtl((-a + hypotl(a, b)) * 0.5); |
| 100 result = cpackl(fabsl(b) / (2 * t), copysignl(t, b)); | 100 result = CMPLXL(fabsl(b) / (2 * t), copysignl(t, b)); |
| 101 } 102 103 /* Rescale. */ 104 if (scale) 105 return (result * 2); 106 else 107 return (result); 108} | 101 } 102 103 /* Rescale. */ 104 if (scale) 105 return (result * 2); 106 else 107 return (result); 108} |