-march for Pentium-M (sonoma)

someone12345 · Guru Joined: 09 Apr 2005 Posts: 365

Hi!

I got a recent sonoma notebook but wonder what -march and -mcpu actually to use? Currently is compile with

CHOST="i686-pc-linux-gnu"
CFLAGS="-O3 -mcpu=i686 -march=pentium4 -pipe -fomit-frame-pointer -funroll-loops -mmmx -msse -msse2 -msse3 -mfpmath=sse"

(hmm, well, pentium-m doesn't have SSE3, does it? So -mfpmath would be sufficient

vendor_id : GenuineIntel
cpu family : 6
model : 13
model name : Intel(R) Pentium(R) M processor 1.60GHz
stepping : 8
cpu MHz : 1596.180
cache size : 2048 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat clflush dts acpi mmx fxsr sse sse2 ss tm pbe nx est tm2
bogomips : 3137.53

b3cks · Posted: Wed Apr 27, 2005 7:58 am Post subject:

Hm... how was this...
gcc < 3.4: -march=pentium3
else: -march=pentium-m
and -mcpu isn't required.
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