[src/trunk]: src/lib/libm/noieee_src add some fallthru comments.

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

details:   https://anonhg.NetBSD.org/src/rev/7e01563aec6a
branches:  trunk
changeset: 838901:7e01563aec6a
user:      mrg <mrg%NetBSD.org@localhost>
date:      Mon Feb 04 03:30:20 2019 +0000

description:
add some fallthru comments.

diffstat:

 lib/libm/noieee_src/n_lgamma.c |  16 ++++++++--------
 1 files changed, 8 insertions(+), 8 deletions(-)

diffs (42 lines):

diff -r 037253f00bf3 -r 7e01563aec6a lib/libm/noieee_src/n_lgamma.c
--- a/lib/libm/noieee_src/n_lgamma.c    Mon Feb 04 03:29:41 2019 +0000
+++ b/lib/libm/noieee_src/n_lgamma.c    Mon Feb 04 03:30:20 2019 +0000
@@ -1,4 +1,4 @@
-/*      $NetBSD: n_lgamma.c,v 1.6 2006/11/24 21:15:54 wiz Exp $ */
+/*      $NetBSD: n_lgamma.c,v 1.7 2019/02/04 03:30:20 mrg Exp $ */
 /*-
  * Copyright (c) 1992, 1993
  *     The Regents of the University of California.  All rights reserved.
@@ -221,15 +221,15 @@
                t = .5*t*t;
                z = 1.0;
                switch (x_int) {
-               case 6: z  = (y + 5);
-               case 5: z *= (y + 4);
-               case 4: z *= (y + 3);
+               case 6: z  = (y + 5); /* FALLTHROUGH */
+               case 5: z *= (y + 4); /* FALLTHROUGH */
+               case 4: z *= (y + 3); /* FALLTHROUGH */
                case 3: z *= (y + 2);
                        rr = __log__D(z);
                        rr.b += a0_lo; rr.a += a0_hi;
                        return(((r+rr.b)+t+rr.a));
                case 2: return(((r+a0_lo)+t)+a0_hi);
-               case 0: r -= log1p(x);
+               case 0: r -= log1p(x); /* FALLTHROUGH */
                default: rr = __log__D(x);
                        rr.a -= a0_hi; rr.b -= a0_lo;
                        return(((r - rr.b) + t) - rr.a);
@@ -246,9 +246,9 @@
                q = hi*t;
                z = 1.0;
                switch (x_int) {
-               case 6: z  = (y + 5);
-               case 5: z *= (y + 4);
-               case 4: z *= (y + 3);
+               case 6: z  = (y + 5); /* FALLTHROUGH */
+               case 5: z *= (y + 4); /* FALLTHROUGH */
+               case 4: z *= (y + 3); /* FALLTHROUGH */
                case 3: z *= (y + 2);
                        rr = __log__D(z);
                        r += rr.b; r += q;