ref: 98c796a020ba9bed691702b524f41bfbd609cdde
dir: /common/libsndfile/src/floatcast.h/
/* ** Copyright (C) 2001 Erik de Castro Lopo <erikd@zip.com.au> ** ** This program is free software; you can redistribute it and/or modify ** it under the terms of the GNU Lesser General Public License as published by ** the Free Software Foundation; either version 2.1 of the License, or ** (at your option) any later version. ** ** This program 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 Lesser General Public License for more details. ** ** You should have received a copy of the GNU Lesser General Public License ** along with this program; if not, write to the Free Software ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* On Intel Pentium processors (especially PIII and probably P4), converting ** from float to int is very slow. To meet the C specs, the code produced by ** most C compilers targeting Pentium needs to change the FPU rounding mode ** before the float to int conversion is performed. ** ** Changing the FPU rounding mode causes the FPU pipeline to be flushed. It ** is this flushing of the pipeline which is so slow. */ /* These macros are place holders for inline functions which will replace ** them in the near future. */ #define FLOAT_TO_INT(x) ((int)(x)) #define FLOAT_TO_SHORT(x) ((short)(x)) #define DOUBLE_TO_INT(x) ((int)(x)) #define DOUBLE_TO_SHORT(x) ((short)(x))