r3969 - trunk/bse

[timj svn gnome org]

Author: timj
Date: 2006-10-15 16:50:41 -0400 (Sun, 15 Oct 2006)
New Revision: 3969

Modified:
   trunk/bse/ChangeLog
   trunk/bse/bseieee754.h
Log:
Sun Oct 15 22:49:51 2006  Tim Janik  <timj gtk org>                                                                                                           
                                                                                                                                                              
        * bseieee754.h: added BSE_DOUBLE_EPSILON and BSE_FLOAT_EPSILON,                                                                                       
        constants for the round-off error at 1.0.                                                                                                             
                                                                                                                                                              


Modified: trunk/bse/ChangeLog
===================================================================
--- trunk/bse/ChangeLog	2006-10-15 19:34:06 UTC (rev 3968)
+++ trunk/bse/ChangeLog	2006-10-15 20:50:41 UTC (rev 3969)
@@ -1,3 +1,8 @@
+Sun Oct 15 22:49:51 2006  Tim Janik  <timj gtk org>
+
+	* bseieee754.h: added BSE_DOUBLE_EPSILON and BSE_FLOAT_EPSILON, 
+	constants for the round-off error at 1.0.
+
 Sun Oct 15 20:58:57 2006  Stefan Westerfeld  <stefan space twc de>
 
 	* gslfilter.c: Made implementation of gsl_filter_sine_scan() more

Modified: trunk/bse/bseieee754.h
===================================================================
--- trunk/bse/bseieee754.h	2006-10-15 19:34:06 UTC (rev 3968)
+++ trunk/bse/bseieee754.h	2006-10-15 20:50:41 UTC (rev 3969)
@@ -46,15 +46,17 @@
 
 /* floating point type related constants */
 #define BSE_FLOAT_BIAS		 (127)
-#define	BSE_FLOAT_MAX_NORMAL	 (3.40282347e+38)	   /* 7f7fffff */
+#define	BSE_FLOAT_MAX_NORMAL	 (3.40282347e+38)	   /* 7f7fffff, 2^128 * (1 - BSE_FLOAT_EPSILON) */
 #define	BSE_FLOAT_MIN_NORMAL	 (1.17549435e-38)	   /* 00800000 */
 #define	BSE_FLOAT_MAX_SUBNORMAL	 (1.17549421e-38)	   /* 007fffff */
 #define	BSE_FLOAT_MIN_SUBNORMAL	 (1.40129846e-45)	   /* 00000001 */
+#define	BSE_FLOAT_EPSILON	 (5.9604644775390625e-08)  /* 2^-24, round-off error at 1.0 */
 #define BSE_DOUBLE_BIAS		 (1023)
-#define	BSE_DOUBLE_MAX_NORMAL	 (1.7976931348623157e+308) /* 7fefffff ffffffff */
+#define	BSE_DOUBLE_MAX_NORMAL	 (1.7976931348623157e+308) /* 7fefffff ffffffff, 2^1024 * (1 - BSE_DOUBLE_EPSILON) */
 #define	BSE_DOUBLE_MIN_NORMAL	 (2.2250738585072014e-308) /* 00100000 00000000 */
 #define	BSE_DOUBLE_MAX_SUBNORMAL (2.2250738585072009e-308) /* 000fffff ffffffff */
 #define	BSE_DOUBLE_MIN_SUBNORMAL (4.9406564584124654e-324) /* 00000000 00000001 */
+#define	BSE_DOUBLE_EPSILON	 (1.1102230246251565404236316680908203125e-16) /* 2^-53, round-off error at 1.0 */
 #define	BSE_DOUBLE_INF		 (_bse_dinf_union.d)
 #define	BSE_DOUBLE_NAN		 (_bse_dnan_union.d)
 #define	BSE_FLOAT_INF		 (_bse_finf_union.f)