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- /* Copyright (C) 1993 Aladdin Enterprises. All rights reserved.
-
- This file is part of Aladdin Ghostscript.
-
- Aladdin Ghostscript is distributed with NO WARRANTY OF ANY KIND. No author
- or distributor accepts any responsibility for the consequences of using it,
- or for whether it serves any particular purpose or works at all, unless he
- or she says so in writing. Refer to the Aladdin Ghostscript Free Public
- License (the "License") for full details.
-
- Every copy of Aladdin Ghostscript must include a copy of the License,
- normally in a plain ASCII text file named PUBLIC. The License grants you
- the right to copy, modify and redistribute Aladdin Ghostscript, but only
- under certain conditions described in the License. Among other things, the
- License requires that the copyright notice and this notice be preserved on
- all copies.
- */
-
- /* gxfarith.h */
- /* Floating point arithmetic macros for Ghostscript library */
- #include "gxarith.h"
-
- /*
- * These macros replace the ones in gxarith.h on machines
- * that are likely to have very slow floating point.
- * Note that any module that includes this file should be compiled
- * with USE_FPU defined; otherwise, the default definitions will prevail.
- */
- #ifdef USE_FPU
- # if USE_FPU <= 0 && arch_floats_are_IEEE && (arch_sizeof_float == arch_sizeof_int || arch_sizeof_float == arch_sizeof_long)
- # if arch_sizeof_float == arch_sizeof_int
- # define _f_as_int(f) *(int *)(&(f))
- # else /* arch_sizeof_float == arch_sizeof_long */
- # define _f_as_int(f) *(long *)(&(f))
- # endif
- # if arch_sizeof_double == arch_sizeof_int
- # define _d_as_int(f) *(int *)(&(d))
- # else
- # if arch_sizeof_double == arch_sizeof_long
- # define _d_as_int(f) *(long *)(&(d))
- # endif
- # endif
- # ifdef _d_as_int
- # define _fdtest(v,f,d,n)\
- (sizeof(v)==sizeof(float)?(f):sizeof(v)==sizeof(double)?(d):(n))
- # else
- # define _fdtest(v,f,d,n)\
- (sizeof(v)==sizeof(float)?(f):(n))
- # endif
- # undef is_fzero
- # define is_fzero(f) /* must handle both +0 and -0 */\
- _fdtest(f, (_f_as_int(f) << 1) == 0, (_d_as_int(f) << 1) == 0,\
- (f) == 0.0)
- # undef is_fzero2
- # define is_fzero2(f1,f2)\
- (sizeof(f1) == sizeof(float) && sizeof(f2) == sizeof(float) ?\
- ((_f_as_int(f1) | _f_as_int(f2)) << 1) == 0 :\
- (f1) == 0.0 && (f2) == 0.0)
- # undef is_fneg
- # if arch_is_big_endian
- # define _is_fnegb(f) (*(byte *)&(f) >= 0x80)
- # else
- # define _is_fnegb(f) (((byte *)&(f))[sizeof(f) - 1] >= 0x80)
- # endif
- # if arch_sizeof_float == arch_sizeof_int
- # define is_fneg(f)\
- (sizeof(f) == sizeof(float) ? _f_as_int(f) < 0 :\
- _is_fnegb(f))
- # else
- # define is_fneg(f) _is_fnegb(f)
- # endif
- # undef is_fge1
- # if arch_sizeof_float == arch_sizeof_int
- # define is_fge1(f)\
- (sizeof(f) == sizeof(float) ?\
- (_f_as_int(f)) >= 0x3f800000 /* IEEE 1.0 */ :\
- (f) >= 1.0)
- # else /* arch_sizeof_float == arch_sizeof_long */
- # define is_fge1(f)\
- (sizeof(f) == sizeof(float) ?\
- (int)(_f_as_int(f) >> 16) >= 0x3f80 :\
- (f) >= 1.0)
- # endif
- # endif
- #endif
-