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#
# Configuration file for a PC using a Pentium Class CPU
#
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
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