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Subject: Intel's C/C++ Compiler 9.0 (64-bits under Linux)

Author: Tom Likens

Date: 13:19:07 07/17/05

I'm curious if anyone else has used Intel's new 9.0 compiler.  I recompiled
Djinn for 64-bits and I'm seeing around 1.3M nps (on average middlegame
positions).  The best I could get out of the 64-bit version of g++ 3.3.5 was
around 900k nps (all of this is on an Athlon FX-51).  For the curious my Intel
compile settings were (note, this uses profiling info)...

intel64-prof: CC      = /opt/intel/cce/9.0/bin/icpc
intel64-prof: OPT     = -DX86_64 -DFAST -pipe -O3 -fomit-frame-pointer
intel64-prof: OPT    := $(OPT) -no-prec-div -fno-rtti -funroll-loops
intel64-prof: OPT    := $(OPT) -align -Zp16 -static -march=pentium4
intel64-prof: OPT    := $(OPT) -prof_genx -prof_dir ./profile -fp-model fast
intel64-prof: OPT    := $(OPT) -rcd
intel64-prof: DBG     =
intel64-prof: LFLAGS  = -static

I'm not sure if these switches are optimal, but they seem reasonable and in my
limited number of experiments seem to give the best results.

regards,
--tom

• Re: Intel's C/C++ Compiler 9.0 (64-bits under Linux) Gian-Carlo Pascutto 16:26:49 07/18/05
  • Re: Intel's C/C++ Compiler 9.0 (64-bits under Linux) Dann Corbit 17:00:13 07/18/05
    • Re: Intel's C/C++ Compiler 9.0 (64-bits under Linux) Tom Likens 19:49:34 07/18/05
      • Re: Intel's C/C++ Compiler 9.0 (64-bits under Linux) Gian-Carlo Pascutto 01:04:52 07/19/05
    • Re: Intel's C/C++ Compiler 9.0 (64-bits under Linux) Gian-Carlo Pascutto 17:12:53 07/18/05

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