implicit-fallthrough warnings in powerpc64le-linux GCC build

[Sebastian Huber <sebastian dot huber at embedded-brains dot de>]

Hello,

I noticed some implicit-fallthrough warnings in a powerpc64le-linux GCC 
build:

/home/sh/b-gcc-git/./gcc/xgcc -B/home/sh/b-gcc-git/./gcc/ 
-B/home/sh/install-gcc-git/powerpc64le-unknown-linux-gnu/bin/ 
-B/home/sh/install-gcc-git/powerpc64le-unknown-linux-gnu/lib/ -isystem 
/home/sh/install-gcc-git/powerpc64le-unknown-linux-gnu/include -isystem 
/home/sh/install-gcc-git/powerpc64le-unknown-linux-gnu/sys-include -g 
-O2 -O2  -g -O2 -DIN_GCC    -W -Wall -Wno-narrowing -Wwrite-strings 
-Wcast-qual -Wno-format -Wstrict-prototypes -Wmissing-prototypes 
-Wold-style-definition  -isystem ./include -fPIC -mlong-double-128 
-mno-minimal-toc -g -DIN_LIBGCC2 -fbuilding-libgcc 
-fno-stack-protector   -fPIC -mlong-double-128 -mno-minimal-toc -I. -I. 
-I../.././gcc -I/home/sh/gcc-git/libgcc -I/home/sh/gcc-git/libgcc/. 
-I/home/sh/gcc-git/libgcc/../gcc -I/home/sh/gcc-git/libgcc/../include 
-I/home/sh/gcc-git/libgcc/../libdecnumber/dpd 
-I/home/sh/gcc-git/libgcc/../libdecnumber -DHAVE_CC_TLS  -o _ucmpdi2.o 
-MT _ucmpdi2.o -MD -MP -MF _ucmpdi2.dep -DL_ucmpdi2 -c 
/home/sh/gcc-git/libgcc/libgcc2.c -fvisibility=hidden -DHIDE_EXPORTS
/home/sh/gcc-git/libgcc/soft-fp/op-common.h:900:10: warning: this 
statement may fall through [-Wimplicit-fallthrough=]
    R##_s = X##_s;     \
/home/sh/gcc-git/libgcc/soft-fp/quad.h:308:29: note: in expansion of 
macro ‘_FP_MUL’
 # define FP_MUL_Q(R, X, Y)  _FP_MUL (Q, 2, R, X, Y)
                             ^~~~~~~
mulkf3-sw.c:48:3: note: in expansion of macro ‘FP_MUL_Q’
   FP_MUL_Q (R, A, B);
   ^~~~~~~~
/home/sh/gcc-git/libgcc/soft-fp/op-common.h:902:2: note: here
  case _FP_CLS_COMBINE (FP_CLS_INF, FP_CLS_INF):  \
  ^
/home/sh/gcc-git/libgcc/soft-fp/quad.h:308:29: note: in expansion of 
macro ‘_FP_MUL’
 # define FP_MUL_Q(R, X, Y)  _FP_MUL (Q, 2, R, X, Y)
                             ^~~~~~~
mulkf3-sw.c:48:3: note: in expansion of macro ‘FP_MUL_Q’
   FP_MUL_Q (R, A, B);
   ^~~~~~~~
/home/sh/gcc-git/libgcc/soft-fp/op-common.h:913:10: warning: this 
statement may fall through [-Wimplicit-fallthrough=]
    R##_s = Y##_s;     \
/home/sh/gcc-git/libgcc/soft-fp/quad.h:308:29: note: in expansion of 
macro ‘_FP_MUL’
 # define FP_MUL_Q(R, X, Y)  _FP_MUL (Q, 2, R, X, Y)
                             ^~~~~~~
mulkf3-sw.c:48:3: note: in expansion of macro ‘FP_MUL_Q’
   FP_MUL_Q (R, A, B);
   ^~~~~~~~
/home/sh/gcc-git/libgcc/soft-fp/op-common.h:915:2: note: here
  case _FP_CLS_COMBINE (FP_CLS_NORMAL, FP_CLS_INF): \
  ^
/home/sh/gcc-git/libgcc/soft-fp/quad.h:308:29: note: in expansion of 
macro ‘_FP_MUL’
 # define FP_MUL_Q(R, X, Y)  _FP_MUL (Q, 2, R, X, Y)
                             ^~~~~~~
mulkf3-sw.c:48:3: note: in expansion of macro ‘FP_MUL_Q’
   FP_MUL_Q (R, A, B);
   ^~~~~~~

I don't know this code enough to fix them.

--
Sebastian Huber, embedded brains GmbH

Address : Dornierstr. 4, D-82178 Puchheim, Germany
Phone   : +49 89 189 47 41-16
Fax     : +49 89 189 47 41-09
E-Mail  : sebastian.huber@embedded-brains.de
PGP     : Public key available on request.

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