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sh: fcnvds fix with denormalized numbers on SH-4 FPU.

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This fixes a bug in the FPU exception handler for the FCNVDS instruction.
To get the register number the instruction is shifted right by 9,
though it should be shifted right by 8.

More information at ST Linux bugzilla:

	https://bugzilla.stlinux.com/show_bug.cgi?id=4892

Signed-off-by: Giuseppe Di Giore <giuseppe.di-giore@st.com>
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Carmelo AMOROSO
2008-10-15 16:48:16 +01:00
committed by Paul Mundt
parent 4886516310
commit 0f6dee232f
1 changed files with 1 additions and 1 deletions
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arch/sh/kernel/cpu/sh4/fpu.c
+1 -1
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@@ -423,7 +423,7 @@ static int ieee_fpe_handler(struct pt_regs *regs)
int m;
unsigned int hx;
m = (finsn >> 9) & 0x7;
m = (finsn >> 8) & 0x7;
hx = tsk->thread.fpu.hard.fp_regs[m];
if ((tsk->thread.fpu.hard.fpscr & FPSCR_CAUSE_ERROR)