Delete an empty file and re-add .gitignore and .gitmodulesrtas22
Local changes left by Leo on tama.cs.unc.edu. Committing these
before deleting his home directory.
For future researchers doing reproduction work, the machine used
was based around an AMD 3950X running the LITMUS-RT version of
Linux 5.4 (specifically, commit e08aa058 aka. the rtas21-ae branch
of LITMUS-RT developed by Joshua Bakita and on GitHub).
/* * ==================================================== * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. * * Developed at SunPro, a Sun Microsystems, Inc. business. * Permission to use, copy, modify, and distribute this * software is freely granted, provided that this notice * is preserved. * ==================================================== *//* * from: @(#)fdlibm.h 5.1 93/09/24 */#ifndef _MATH_PRIVATE_H_#define _MATH_PRIVATE_H_#include"wcclibm.h"//#include <endian.h>//#include <sys/types.h>/* A representation of a double as a union. */union ieee754_double
{double d;/* This is the IEEE 754 double-precision format. */struct{/* Together these comprise the mantissa. */unsigned int mantissa1:32;unsigned int mantissa0:20;unsigned int exponent:11;unsigned int negative:1;} ieee;/* This format makes it easier to see if a NaN is a signalling NaN. */struct{/* Together these comprise the mantissa. */unsigned int mantissa1:32;unsigned int mantissa0:19;unsigned int quiet_nan:1;unsigned int exponent:11;unsigned int negative:1;} ieee_nan;};/* The original fdlibm code used statements like: n0 = ((*(int*)&one)>>29)^1; * index of high word * ix0 = *(n0+(int*)&x); * high word of x * ix1 = *((1-n0)+(int*)&x); * low word of x * to dig two 32 bit words out of the 64 bit IEEE floating point value. That is non-ANSI, and, moreover, the gcc instruction scheduler gets it wrong. We instead use the following macros. Unlike the original code, we determine the endianness at compile time, not at run time; I don't see much benefit to selecting endianness at run time. *//* A union which permits us to convert between a double and two 32 bit ints. *//* #if __FLOAT_WORD_ORDER == BIG_ENDIAN *//* #warning USING Big Endian float word order *//* typedef union *//* { *//* double value; *//* struct *//* { *//* u_int16_t msw; *//* u_int16_t lsw; *//* } parts; *//* } ieeeDoubleShapeType; *//* #endif *//* #if __FLOAT_WORD_ORDER == LITTLE_ENDIAN *//* #warning USING Little Endian float word order */typedefunion{double value;struct{
u_int16_t lsw;
u_int16_t msw;} parts;} ieeeDoubleShapeType;/* #endif *//* Get two 32 bit ints from a double. */#define EXTRACT_WORDS(ix0,ix1,d) \{ \ ieeeDoubleShapeType ew_u; \ ew_u.value = (d); \ (ix0) = ew_u.parts.msw; \ (ix1) = ew_u.parts.lsw; \}/* Get the more significant 32 bit int from a double. */#define GET_HIGH_WORD(i,d) \{ \ ieeeDoubleShapeType gh_u; \ gh_u.value = (d); \ (i) = gh_u.parts.msw; \}/* Get the less significant 32 bit int from a double. */#define GET_LOW_WORD(i,d) \{ \ ieeeDoubleShapeType gl_u; \ gl_u.value = (d); \ (i) = gl_u.parts.lsw; \}/* Set a double from two 32 bit ints. */#define INSERT_WORDS(d,ix0,ix1) \{ \ ieeeDoubleShapeType iw_u; \ iw_u.parts.msw = (ix0); \ iw_u.parts.lsw = (ix1); \ (d) = iw_u.value; \}/* Set the more significant 32 bits of a double from an int. */#define SET_HIGH_WORD(d,v) \{ \ ieeeDoubleShapeType sh_u; \ sh_u.value = (d); \ sh_u.parts.msw = (v); \ (d) = sh_u.value; \}/* Set the less significant 32 bits of a double from an int. */#define SET_LOW_WORD(d,v) \{ \ ieeeDoubleShapeType sl_u; \ sl_u.value = (d); \ sl_u.parts.lsw = (v); \ (d) = sl_u.value; \}/* A union which permits us to convert between a float and a 32 bit int. */typedefunion{float value;
u_int32_t word;} ieee_float_shape_type;/* Get a 32 bit int from a float. */#define GET_FLOAT_WORD(i,d) \{ \ ieee_float_shape_type gf_u; \ gf_u.value = (d); \ (i) = gf_u.word; \}/* Set a float from a 32 bit int. */#define SET_FLOAT_WORD(d,i) \{ \ ieee_float_shape_type sf_u; \ sf_u.word = (i); \ (d) = sf_u.value; \}#endif/* _MATH_PRIVATE_H_ */
