Module Name: src
Committed By: riastradh
Date: Mon Sep 9 15:05:51 UTC 2024
Modified Files:
src/include: math.h
Log Message:
math.h: Define FP_FAST_FMA, FP_FAST_FMAF, FP_FAST_FMAL.
These are not strictly necessary to define, really, so we haven't
exactly been nonconformant. But they tell programs when they can
enable fast paths by using the fma(3) family of functions.
PR standards/56234: missing C99 frobs in <math.h>
To generate a diff of this commit:
cvs rdiff -u -r1.70 -r1.71 src/include/math.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/include/math.h
diff -u src/include/math.h:1.70 src/include/math.h:1.71
--- src/include/math.h:1.70 Tue May 7 15:17:35 2024
+++ src/include/math.h Mon Sep 9 15:05:51 2024
@@ -1,4 +1,4 @@
-/* $NetBSD: math.h,v 1.70 2024/05/07 15:17:35 riastradh Exp $ */
+/* $NetBSD: math.h,v 1.71 2024/09/09 15:05:51 riastradh Exp $ */
/*
* ====================================================
@@ -25,9 +25,6 @@
* Missing for C99 support:
* - MATH_ERRNO
* - MATH_ERREXCEPT
- * - FP_FAST_FMA
- * - FP_FAST_FMAF
- * - FP_FAST_FMAL
* - math_errhandling
*/
@@ -143,6 +140,20 @@ extern const union __float_u __nanf;
#define _FP_LOMD 0x80 /* range for machine-specific classes */
#define _FP_HIMD 0xff
+/* 7.12#7 fast fma(3) feature test macros */
+#if __GNUC_PREREQ__(4, 4)
+# ifdef __FP_FAST_FMA
+# define FP_FAST_FMA 1
+# endif
+# ifdef __FP_FAST_FMAF
+# define FP_FAST_FMAF 1
+# endif
+# ifdef __FP_FAST_FMAL
+# define FP_FAST_FMAL 1
+# endif
+#endif
+
+/* 7.12#8 ilogb exceptional input result value macros */
#define FP_ILOGB0 INT_MIN
#define FP_ILOGBNAN INT_MAX
