| 0,0 → 1,129 |
|---|
| /* |
| * Copyright (C) 2005 Josef Cejka |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - 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. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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. |
| */ |
| |
| /** @addtogroup softfloat |
| * @{ |
| */ |
| /** @file |
| */ |
| |
| #include<sftypes.h> |
| #include<comparison.h> |
| |
| inline int isFloat32NaN(float32 f) |
| { /* NaN : exp = 0xff and nonzero fraction */ |
| return ((f.parts.exp==0xFF)&&(f.parts.fraction)); |
| } |
| |
| inline int isFloat64NaN(float64 d) |
| { /* NaN : exp = 0x7ff and nonzero fraction */ |
| return ((d.parts.exp==0x7FF)&&(d.parts.fraction)); |
| } |
| |
| inline int isFloat32SigNaN(float32 f) |
| { /* SigNaN : exp = 0xff fraction = 0xxxxx..x (binary), where at least one x is nonzero */ |
| return ((f.parts.exp==0xFF)&&(f.parts.fraction<0x400000)&&(f.parts.fraction)); |
| } |
| |
| inline int isFloat64SigNaN(float64 d) |
| { /* SigNaN : exp = 0x7ff fraction = 0xxxxx..x (binary), where at least one x is nonzero */ |
| return ((d.parts.exp==0x7FF)&&(d.parts.fraction)&&(d.parts.fraction<0x8000000000000ll)); |
| } |
| |
| inline int isFloat32Infinity(float32 f) |
| { |
| return ((f.parts.exp==0xFF)&&(f.parts.fraction==0x0)); |
| } |
| |
| inline int isFloat64Infinity(float64 d) |
| { |
| return ((d.parts.exp==0x7FF)&&(d.parts.fraction==0x0)); |
| } |
| |
| inline int isFloat32Zero(float32 f) |
| { |
| return (((f.binary) & 0x7FFFFFFF) == 0); |
| } |
| |
| inline int isFloat64Zero(float64 d) |
| { |
| return (((d.binary) & 0x7FFFFFFFFFFFFFFFll) == 0); |
| } |
| |
| /** |
| * @return 1, if both floats are equal - but NaNs are not recognized |
| */ |
| inline int isFloat32eq(float32 a, float32 b) |
| { |
| return ((a.binary==b.binary)||(((a.binary| b.binary)&0x7FFFFFFF)==0)); /* a equals to b or both are zeros (with any sign) */ |
| } |
| |
| /** |
| * @return 1, if a<b - but NaNs are not recognized |
| */ |
| inline int isFloat32lt(float32 a, float32 b) |
| { |
| if (((a.binary| b.binary)&0x7FFFFFFF)==0) { |
| return 0; /* +- zeroes */ |
| }; |
| |
| if ((a.parts.sign)&&(b.parts.sign)) { |
| /*if both are negative, smaller is that with greater binary value*/ |
| return (a.binary>b.binary); |
| }; |
| |
| /* lets negate signs - now will be positive numbers allways bigger than negative (first bit will be set for unsigned integer comparison)*/ |
| a.parts.sign=!a.parts.sign; |
| b.parts.sign=!b.parts.sign; |
| return (a.binary<b.binary); |
| |
| } |
| |
| /** |
| * @return 1, if a>b - but NaNs are not recognized |
| */ |
| inline int isFloat32gt(float32 a, float32 b) |
| { |
| if (((a.binary| b.binary)&0x7FFFFFFF)==0) { |
| return 0; /* zeroes are equal with any sign */ |
| }; |
| |
| if ((a.parts.sign)&&(b.parts.sign)) { |
| /*if both are negative, greater is that with smaller binary value*/ |
| return (a.binary<b.binary); |
| }; |
| |
| /* lets negate signs - now will be positive numbers allways bigger than negative (first bit will be set for unsigned integer comparison)*/ |
| a.parts.sign=!a.parts.sign; |
| b.parts.sign=!b.parts.sign; |
| return (a.binary>b.binary); |
| |
| } |
| |
| /** @} |
| */ |