https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66905
Bug ID: 66905
Summary: SSE not enabled for -march=pentium4
Product: gcc
Version: 4.8.3
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: michael.finn.jorgensen at gmail dot com
Target Milestone: ---
The command:
gcc -c -Q -march=pentium4 --help=target
outputs (amoung other stuff):
-msse [disabled]
But I expected the output to show that SSE is enabled. According to the manual
at
https://gcc.gnu.org/onlinedocs/gcc-4.8.3/gcc/i386-and-x86-64-Options.html#i386-and-x86-64-Options
the pentium4 processor supports SSE.
The same problem occurs when using -march=native, with my CPU (which is a
Pentium 4).
I would expect GCC to automatically enable all the features specific for the
CPU model, when using the -march option.
