BTW, I just tried the same test-case on a different machine -- and it
seems to work properly there (-march=native results in a correct default
value for -mtune).
The only real difference between the machines is that the previous
machine (where gcc showed the bug) has a pentium3 cpu, whereas the
current machine (where gcc seems to work correctly) has a pentium4.
On this machine:
$ echo 'float x(float x){return x < 0 ? -x : x;}' > x.c
$ gcc -fverbose-asm -O2 -mfpmath=sse -march=native -S x.c
$ grep '\(-march\|-mtune\)' x.s
# options passed: -march=pentium4 -mtune=pentium4 -mfpmath=sse -auxbase
$ head -2 x.s
.file "x.c"
# GNU C version 4.2.3 20071014 (prerelease) (Debian 4.2.2-3) (i486-linux-gnu)
-Miles
--
`The suburb is an obsolete and contradictory form of human settlement'
--
To UNSUBSCRIBE, email to [EMAIL PROTECTED]
with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
