/* Front-end tree definitions for GNU compiler. Copyright (C) 1989 Free Software Foundation, Inc. This file is part of GNU CC. GNU CC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 1, or (at your option) any later version. GNU CC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU CC; see the file COPYING. If not, write to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ #ifndef REAL_H_INCLUDED #define REAL_H_INCLUDED /* If we are not cross-compiling, use a `double' to represent the floating-point value. Otherwise, use some other type (probably a struct containing an array of longs). */ #ifndef REAL_VALUE_TYPE #define REAL_VALUE_TYPE double #else #define REAL_IS_NOT_DOUBLE #endif /* Compare two floating-point values for equality. */ #ifndef REAL_VALUES_EQUAL #define REAL_VALUES_EQUAL(x,y) ((x) == (y)) #endif /* Compare two floating-point values for less than. */ #ifndef REAL_VALUES_LESS #define REAL_VALUES_LESS(x,y) ((x) < (y)) #endif /* Scale X by Y powers of 2. */ #ifndef REAL_VALUE_LDEXP #define REAL_VALUE_LDEXP(x,y) ldexp (x, y) extern double ldexp (); #endif /* Convert the string X to a floating-point value. */ #ifndef REAL_VALUE_ATOF #define REAL_VALUE_ATOF(x) atof (x) extern double atof (); #endif /* Negate the floating-point value X. */ #ifndef REAL_VALUE_NEGATE #define REAL_VALUE_NEGATE(x) (- (x)) #endif /* Truncate the floating-point value X to single-precision. */ #ifndef REAL_VALUE_TRUNCATE #define REAL_VALUE_TRUNCATE(x) ((float) (x)) #endif /* Union type used for extracting real values from CONST_DOUBLEs or putting them in. */ union real_extract { REAL_VALUE_TYPE d; int i[sizeof (REAL_VALUE_TYPE) / sizeof (int)]; }; /* For a CONST_DOUBLE: The usual two ints that hold the value. For a DImode, that is all there are; and CONST_DOUBLE_LOW is the low-order word and ..._HIGH the high-order. For a float, the number of ints varies, and CONST_DOUBLE_LOW is the one that should come first *in memory*. So use &CONST_DOUBLE_LOW(r) as the address of an array of ints. */ #define CONST_DOUBLE_LOW(r) XINT (r, 2) #define CONST_DOUBLE_HIGH(r) XINT (r, 3) /* Link for chain of all CONST_DOUBLEs in use in current function. */ #define CONST_DOUBLE_CHAIN(r) XEXP (r, 1) /* The MEM which represents this CONST_DOUBLE's value in memory, or const0_rtx if no MEM has been made for it yet, or cc0_rtx if it is not on the chain. */ #define CONST_DOUBLE_MEM(r) XEXP (r, 0) /* Function to return a real value (not a tree node) from a given integer constant. */ REAL_VALUE_TYPE real_value_from_int_cst (); #endif /* Not REAL_H_INCLUDED */