forked from Github_Repos/cvw
139 lines
3.5 KiB
C
139 lines
3.5 KiB
C
|
|
/*============================================================================
|
|
|
|
This C source file is part of TestFloat, Release 3e, a package of programs for
|
|
testing the correctness of floating-point arithmetic complying with the IEEE
|
|
Standard for Floating-Point, by John R. Hauser.
|
|
|
|
Copyright 2011, 2012, 2013, 2014 The Regents of the University of California.
|
|
All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
|
|
1. Redistributions of source code must retain the above copyright notice,
|
|
this list of conditions, and the following disclaimer.
|
|
|
|
2. 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.
|
|
|
|
3. Neither the name of the University nor the names of its contributors may
|
|
be used to endorse or promote products derived from this software without
|
|
specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "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 REGENTS OR CONTRIBUTORS 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.
|
|
|
|
=============================================================================*/
|
|
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
#include "platform.h"
|
|
#include "random.h"
|
|
|
|
uint_fast8_t random_ui8( void )
|
|
{
|
|
|
|
return rand()>>4 & 0xFF;
|
|
|
|
}
|
|
|
|
uint_fast16_t random_ui16( void )
|
|
{
|
|
|
|
return (rand() & 0x0FF0)<<4 | (rand()>>4 & 0xFF);
|
|
|
|
}
|
|
|
|
uint_fast32_t random_ui32( void )
|
|
{
|
|
|
|
return
|
|
(uint_fast32_t) (rand() & 0x0FF0)<<20
|
|
| (uint_fast32_t) (rand() & 0x0FF0)<<12
|
|
| (rand() & 0x0FF0)<<4
|
|
| (rand()>>4 & 0xFF);
|
|
|
|
}
|
|
|
|
uint_fast64_t random_ui64( void )
|
|
{
|
|
|
|
return (uint_fast64_t) random_ui32()<<32 | random_ui32();
|
|
|
|
}
|
|
|
|
uint_fast8_t randomN_ui8( uint_fast8_t N )
|
|
{
|
|
uint_fast8_t scale, z;
|
|
|
|
scale = 0;
|
|
while ( N < 0x80 ) {
|
|
++scale;
|
|
N <<= 1;
|
|
}
|
|
do {
|
|
z = random_ui8();
|
|
} while ( N <= z );
|
|
return z>>scale;
|
|
|
|
}
|
|
|
|
uint_fast16_t randomN_ui16( uint_fast16_t N )
|
|
{
|
|
uint_fast16_t scale, z;
|
|
|
|
scale = 0;
|
|
while ( N < 0x8000 ) {
|
|
++scale;
|
|
N <<= 1;
|
|
}
|
|
do {
|
|
z = random_ui16();
|
|
} while ( N <= z );
|
|
return z>>scale;
|
|
|
|
}
|
|
|
|
uint_fast32_t randomN_ui32( uint_fast32_t N )
|
|
{
|
|
uint_fast32_t scale, z;
|
|
|
|
scale = 0;
|
|
while ( N < 0x8000 ) {
|
|
++scale;
|
|
N <<= 1;
|
|
}
|
|
do {
|
|
z = random_ui32();
|
|
} while ( N <= z );
|
|
return z>>scale;
|
|
|
|
}
|
|
|
|
uint_fast64_t randomN_ui64( uint_fast64_t N )
|
|
{
|
|
uint_fast64_t scale, z;
|
|
|
|
scale = 0;
|
|
while ( N < 0x8000 ) {
|
|
++scale;
|
|
N <<= 1;
|
|
}
|
|
do {
|
|
z = random_ui64();
|
|
} while ( N <= z );
|
|
return z>>scale;
|
|
|
|
}
|
|
|