http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47617
Summary: SSE rounding mode works -g, not -O3
Product: gcc
Version: 4.3.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: cck0...@yahoo.com
Created attachment 23252
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23252
generated .i file
Hi folks,
I'm working with SSE intrinsics and think I have a rounding problem. When I
try to change modes with _MM_SET_ROUNDING_MODE, I see different results when
compiled "-g", but not "-O3".
What am I missing?
thanks!
Using built-in specs.
Target: i386-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl
=http://bugzilla.redhat.com/bugzilla --enable-bootstrap --enable-shared
--enable-threads=posix --enable-che
cking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-languages=c,
c++,objc,obj-c++,java,fortran,ada --enable-java-awt=gtk --disable-dssi
--enable-plugin --with-java-home=/us
r/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre --enable-libgcj-multifile
--enable-java-maintainer-mode --with-ecj-jar
=/usr/share/java/eclipse-ecj.jar --disable-libjava-multilib --with-cpu=generic
--build=i386-redhat-linux
Thread model: posix
gcc version 4.3.2 20081105 (Red Hat 4.3.2-7) (GCC)
COLLECT_GCC_OPTIONS='-O3' '-Wall' '-o' 'round' '-msse' '-mmmx' '-save-temps'
'-v' '-mtune=generic'
/usr/libexec/gcc/i386-redhat-linux/4.3.2/cc1 -E -quiet -v round.c -msse -mmmx
-mtune=generic -Wall -O3 -fp
ch-preprocess -o round.i
ignoring nonexistent directory
"/usr/lib/gcc/i386-redhat-linux/4.3.2/include-fixed"
ignoring nonexistent directory
"/usr/lib/gcc/i386-redhat-linux/4.3.2/../../../../i386-redhat-linux/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/local/include
/usr/lib/gcc/i386-redhat-linux/4.3.2/include
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-O3' '-Wall' '-o' 'round' '-msse' '-mmmx' '-save-temps'
'-v' '-mtune=generic'
/usr/libexec/gcc/i386-redhat-linux/4.3.2/cc1 -fpreprocessed round.i -quiet
-dumpbase round.c -msse -mmmx -
mtune=generic -auxbase round -O3 -Wall -version -o round.s
GNU C (GCC) version 4.3.2 20081105 (Red Hat 4.3.2-7) (i386-redhat-linux)
compiled by GNU C version 4.3.2 20081105 (Red Hat 4.3.2-7), GMP version
4.2.2, MPFR version 2.3.2.
GGC heuristics: --param ggc-min-expand=55 --param ggc-min-heapsize=48000
Compiler executable checksum: 3bee52601079f736b7b63b762646f4ba
round.c: In function ‘test_sse1_feature’:
round.c:150: warning: unused variable ‘sig’
round.c:150: warning: unused variable ‘extensions’
round.c:149: warning: ‘edx’ may be used uninitialized in this function
COLLECT_GCC_OPTIONS='-O3' '-Wall' '-o' 'round' '-msse' '-mmmx' '-save-temps'
'-v' '-mtune=generic'
as -V -Qy -o round.o round.s
GNU assembler version 2.18.50.0.9 (i386-redhat-linux) using BFD version version
2.18.50.0.9-8.fc10 20080822
COMPILER_PATH=/usr/libexec/gcc/i386-redhat-linux/4.3.2/:/usr/libexec/gcc/i386-redhat-linux/4.3.2/:/usr/libe
xec/gcc/i386-redhat-linux/:/usr/lib/gcc/i386-redhat-linux/4.3.2/:/usr/lib/gcc/i386-redhat-linux/:/usr/libex
ec/gcc/i386-redhat-linux/4.3.2/:/usr/libexec/gcc/i386-redhat-linux/:/usr/lib/gcc/i386-redhat-linux/4.3.2/:/
usr/lib/gcc/i386-redhat-linux/
LIBRARY_PATH=/usr/lib/gcc/i386-redhat-linux/4.3.2/:/usr/lib/gcc/i386-redhat-linux/4.3.2/:/usr/lib/gcc/i386-
redhat-linux/4.3.2/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-O3' '-Wall' '-o' 'round' '-msse' '-mmmx' '-save-temps'
'-v' '-mtune=generic'
/usr/libexec/gcc/i386-redhat-linux/4.3.2/collect2 --eh-frame-hdr --build-id -m
elf_i386 --hash-style=gnu -
dynamic-linker /lib/ld-linux.so.2 -o round
/usr/lib/gcc/i386-redhat-linux/4.3.2/../../../crt1.o /usr/lib/gc
c/i386-redhat-linux/4.3.2/../../../crti.o
/usr/lib/gcc/i386-redhat-linux/4.3.2/crtbegin.o -L/usr/lib/gcc/i3
86-redhat-linux/4.3.2 -L/usr/lib/gcc/i386-redhat-linux/4.3.2
-L/usr/lib/gcc/i386-redhat-linux/4.3.2/../../.
. round.o -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed
-lgcc_s --no-as-needed /usr/lib/gc
c/i386-redhat-linux/4.3.2/crtend.o
/usr/lib/gcc/i386-redhat-linux/4.3.2/../../../crtn.o
