( pinyo_villany | 2011. 08. 22., h - 22:45 )

eddig a kernel kodban nem volt hasznalhato az fpu, csak userspace oldalrol, ez valtozott 2010 marcius kornyeken:
http://people.freebsd.org/~kib/misc/kernfpu/
http://people.freebsd.org/~kib/misc/amd64_kern_fpu.1.patch

FreeBSD 7-STABLE @ sys/conf/kern.mk


#
# For AMD64, we explicitly prohibit the use of FPU, SSE and other SIMD
# operations inside the kernel itself.  These operations are exclusively
# reserved for user applications.
#
.if ${MACHINE_ARCH} == "amd64"
CFLAGS+=        -mcmodel=kernel -mno-red-zone \
                -mfpmath=387 -mno-sse -mno-sse2 -mno-mmx -mno-3dnow \
                -msoft-float -fno-asynchronous-unwind-tables
INLINE_LIMIT?=  8000
.endif

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