[src/trunk]: src/lib/libm/complex mention why we don't support this (yet)

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/f26ab4cb17ed
branches:  trunk
changeset: 823765:f26ab4cb17ed
user:      christos <christos%NetBSD.org@localhost>
date:      Sun May 07 21:59:06 2017 +0000

description:
mention why we don't support this (yet)

diffstat:

 lib/libm/complex/catrigl.c |  18 ++++++++++--------
 1 files changed, 10 insertions(+), 8 deletions(-)

diffs (63 lines):

diff -r f90fa1236e26 -r f26ab4cb17ed lib/libm/complex/catrigl.c
--- a/lib/libm/complex/catrigl.c        Sun May 07 21:36:23 2017 +0000
+++ b/lib/libm/complex/catrigl.c        Sun May 07 21:59:06 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: catrigl.c,v 1.1 2016/09/19 22:05:05 christos Exp $     */
+/*     $NetBSD: catrigl.c,v 1.2 2017/05/07 21:59:06 christos Exp $     */
 /*-
  * Copyright (c) 2012 Stephen Montgomery-Smith <stephen%FreeBSD.ORG@localhost>
  * All rights reserved.
@@ -35,7 +35,7 @@
  * The code for catrig.c contains complete comments.
  */
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: catrigl.c,v 1.1 2016/09/19 22:05:05 christos Exp $");
+__RCSID("$NetBSD: catrigl.c,v 1.2 2017/05/07 21:59:06 christos Exp $");
 
 #include "namespace.h"
 #ifdef __weak_alias
@@ -46,11 +46,12 @@
 #endif
 
 
+#include <sys/param.h>
 #include <complex.h>
 #include <float.h>
-#ifdef __HAVE_LONG_DOUBLE
+#include <math.h>
+#ifdef notyet // missing log1pl __HAVE_LONG_DOUBLE
 
-#include "math.h"
 #include "math_private.h"
 
 #undef isinf
@@ -65,9 +66,10 @@
 // Ok
 #elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384
 // XXX: Byte order
+#define EXT_EXPBITS    15
 struct ieee_ext {
        uint64_t ext_frac;
-       uint16_t ext_exp:15;
+       uint16_t ext_exp:EXT_EXPBITS;
        uint16_t ext_sign:1;
        uint16_t ext_pad;
 };
@@ -87,14 +89,14 @@
            union ieee_ext_u u; \
            u.extu_ld = s; \
            r = u.extu_sign; \
-           r >>= EXT_EXPBITS - 1;
+           r >>= EXT_EXPBITS - 1; \
     } while (/*CONSTCOND*/0)
-#define SET_LDBL_EXPSIGN(r, s) \
+#define SET_LDBL_EXPSIGN(s, r) \
     do { \
            union ieee_ext_u u; \
            u.extu_ld = s; \
            u.extu_exp &= __BITS(0, EXT_EXPBITS - 1); \
-           u.extu_exp |= r << (EXT_EXPBITS - 1); \
+           u.extu_exp |= (r) << (EXT_EXPBITS - 1); \
            s = u.extu_ld; \
     } while (/*CONSTCOND*/0)