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[POWERPC] 64bit FPSCR support

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Forthcoming machines will extend the FPSCR to 64 bits.  We already
had a 64-bit save area for the FPSCR, but we need to use a new form
of the mtfsf instruction.  Fortunately this new form is decoded as
an ordinary mtfsf by existing 64-bit processors.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Anton Blanchard
2006-06-10 20:18:39 +10:00
committed by Paul Mackerras
parent 30d8caf7c6
commit 3a2c48cfc9
3 changed files with 18 additions and 5 deletions
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4
arch/powerpc/kernel/vector.S
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@@ -53,12 +53,12 @@ fpenable:
stfd fr31,8(r1)
LDCONST(fr1, fpzero)
mffs fr31
mtfsf 0xff,fr1
MTFSF_L(fr1)
blr
fpdisable:
mtlr r12
mtfsf 0xff,fr31
MTFSF_L(fr31)
lfd fr31,8(r1)
lfd fr1,16(r1)
lfd fr0,24(r1)