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| author | Kumar Gala <galak@kernel.crashing.org> | 2007-10-12 00:07:34 +0200 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2007-10-16 16:05:24 +0200 |
| commit | ba02946a903015840ef672ccc9dc8620a7e83de6 (patch) | |
| tree | db338f067ef63fae6b9c7a5dd51b99b1539f8a57 /arch/powerpc/math-emu | |
| parent | Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm (diff) | |
| download | linux-ba02946a903015840ef672ccc9dc8620a7e83de6.tar.xz linux-ba02946a903015840ef672ccc9dc8620a7e83de6.zip | |
[POWERPC] Fix handling of stfiwx math emulation
Its legal for the stfiwx instruction to have RA = 0 as part of its
effective address calculation. This is illegal for all other XE
form instructions.
Add code to compute the proper effective address for stfiwx if
RA = 0 rather than treating it as illegal.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/math-emu')
| -rw-r--r-- | arch/powerpc/math-emu/math.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/arch/powerpc/math-emu/math.c b/arch/powerpc/math-emu/math.c index 69058b2873de..381306bb1590 100644 --- a/arch/powerpc/math-emu/math.c +++ b/arch/powerpc/math-emu/math.c @@ -407,11 +407,16 @@ do_mathemu(struct pt_regs *regs) case XE: idx = (insn >> 16) & 0x1f; - if (!idx) - goto illegal; - op0 = (void *)¤t->thread.fpr[(insn >> 21) & 0x1f]; - op1 = (void *)(regs->gpr[idx] + regs->gpr[(insn >> 11) & 0x1f]); + if (!idx) { + if (((insn >> 1) & 0x3ff) == STFIWX) + op1 = (void *)(regs->gpr[(insn >> 11) & 0x1f]); + else + goto illegal; + } else { + op1 = (void *)(regs->gpr[idx] + regs->gpr[(insn >> 11) & 0x1f]); + } + break; case XEU: |