From b4e3f2f94a505c800e895764e429ec9ec310d9b4 Mon Sep 17 00:00:00 2001 From: mike Date: Sat, 8 Feb 2003 20:37:55 +0000 Subject: Implement fpclassify(): o Add a MD header private to libc called _fpmath.h; this header contains bitfield layouts of MD floating-point types. o Add a MI header private to libc called fpmath.h; this header contains bitfield layouts of MI floating-point types. o Add private libc variables to lib/libc/$arch/gen/infinity.c for storing NaN values. o Add __double_t and __float_t to , and provide double_t and float_t typedefs in . o Add some C99 manifest constants (FP_ILOGB0, FP_ILOGBNAN, HUGE_VALF, HUGE_VALL, INFINITY, NAN, and return values for fpclassify()) to and others (FLT_EVAL_METHOD, DECIMAL_DIG) to via . o Add C99 macro fpclassify() which calls __fpclassify{d,f,l}() based on the size of its argument. __fpclassifyl() is never called on alpha because (sizeof(long double) == sizeof(double)), which is good since __fpclassifyl() can't deal with such a small `long double'. This was developed by David Schultz and myself with input from bde and fenner. PR: 23103 Submitted by: David Schultz (significant portions) Reviewed by: bde, fenner (earlier versions) --- lib/libc/i386/gen/infinity.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'lib/libc/i386/gen') diff --git a/lib/libc/i386/gen/infinity.c b/lib/libc/i386/gen/infinity.c index 547927b..464b402 100644 --- a/lib/libc/i386/gen/infinity.c +++ b/lib/libc/i386/gen/infinity.c @@ -9,3 +9,6 @@ __FBSDID("$FreeBSD$"); /* bytes for +Infinity on a 387 */ const union __infinity_un __infinity = { { 0, 0, 0, 0, 0, 0, 0xf0, 0x7f } }; + +/* bytes for NaN */ +const union __nan_un __nan = { { 0, 0, 0xc0, 0xff } }; -- cgit v1.1