diff options
| author | Jennifer Averett <Jennifer.Averett@OARcorp.com> | 2011-07-14 14:44:47 +0000 |
|---|---|---|
| committer | Jennifer Averett <Jennifer.Averett@OARcorp.com> | 2011-07-14 14:44:47 +0000 |
| commit | 58679ac700107ff60ac6f7e0e642ae72dff99f8e (patch) | |
| tree | 8beefdd342ef16fdaef08c349bc6168f2c1166c8 /c | |
| parent | 2011-07-13 Sebastian Huber <sebastian.huber@embedded-brains.de> (diff) | |
| download | rtems-58679ac700107ff60ac6f7e0e642ae72dff99f8e.tar.bz2 | |
2011-07-14 Jennifer Averett
* make/custom/pcp4.cfg: New file.
Diffstat (limited to 'c')
| -rw-r--r-- | c/src/lib/libbsp/i386/pc386/ChangeLog | 4 | ||||
| -rw-r--r-- | c/src/lib/libbsp/i386/pc386/make/custom/pcp4.cfg | 37 |
2 files changed, 41 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/i386/pc386/ChangeLog b/c/src/lib/libbsp/i386/pc386/ChangeLog index ca2c6a6690..16e2af963f 100644 --- a/c/src/lib/libbsp/i386/pc386/ChangeLog +++ b/c/src/lib/libbsp/i386/pc386/ChangeLog @@ -1,3 +1,7 @@ +2011-07-14 Jennifer Averett + + * make/custom/pcp4.cfg: New file. + 2011-06-19 Ralf Corsépius <ralf.corsepius@rtems.org> * Makefile.am: Fix broken path to clockdrv_shell.h. diff --git a/c/src/lib/libbsp/i386/pc386/make/custom/pcp4.cfg b/c/src/lib/libbsp/i386/pc386/make/custom/pcp4.cfg new file mode 100644 index 0000000000..68babd64a4 --- /dev/null +++ b/c/src/lib/libbsp/i386/pc386/make/custom/pcp4.cfg @@ -0,0 +1,37 @@ +# +# Configuration file for a PC using a Pentium Class CPU +# +# $Id$ +# + +RTEMS_CPU_MODEL=pentium + +# This contains the compiler options necessary to select the CPU model +# and enable architecture-specific features and extensions. + +# Note that the vanilla gcc multilibs for RTEMS are a joke. The +# variants only differ by a -mtune=xxx option which merely 'optimizes' +# for 'xxx' but does not use the full instruction set 'xxx' may implement. +# (fully bwd compatible with i386). +# +# I'd recommend to roll your own set of (useful) multilibs instead... +# +# Useful variants would be +# <default> (i386) (generic 386 with hard-float) +# -msoft-float (generic 386 with soft-float) +# -march=pentium4 (P4 with sse2) +# +# Note also: we give the -mtune=pentium option here only so that at least the +# variant optimized for pentium (w/o using any pentium-specific +# features) is used (assuming you use the vanilla RTEMS multilibs). +# +# And: The only sse-related feature the RTEMS support really needs is +# fxsave/fxrstor. You can build with -msse, -msse2 or -msse3, +# depending on your CPU. +# There are run-time checks resulting in a 'panic' if code +# compiled for e.g. -msse3 is executed on a CPU that only +# supports sse2, though. +CPU_CFLAGS = -mtune=pentium4 -march=pentium4 -msse3 + +include $(RTEMS_ROOT)/make/custom/pc386.cfg + |