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authorRalf Baechle <ralf@linux-mips.org>2006-04-26 16:33:03 -0400
committerRalf Baechle <ralf@linux-mips.org>2006-04-27 10:13:50 -0400
commitee1cca1b0661fa33fd99f2d8ec7e2749432f9b1d (patch)
treee4f2170990c4f387ccd245d6f88b9ea555a26e26 /arch/mips
parent79e55bcf24ad8f31c3021b6ef21c4ce054fe4e38 (diff)
[MIPS] Fix branch emulation for floating-point exceptions.
In the branch emulation for floating-point exceptions, __compute_return_epc must determine for bc1f et al which condition code bit to test. This is based on bits <4:2> of the rt field. The switch statement to distinguish bc1f et al needs to use only the two low bits of rt, but the old code tests on the whole rt field. This patch masks off the proper bits. Signed-off-by: Win Treese <treese@acm.org> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips')
-rw-r--r--arch/mips/kernel/branch.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/mips/kernel/branch.c b/arch/mips/kernel/branch.c
index 374de839558d..b6232d9033cb 100644
--- a/arch/mips/kernel/branch.c
+++ b/arch/mips/kernel/branch.c
@@ -184,7 +184,7 @@ int __compute_return_epc(struct pt_regs *regs)
184 bit = (insn.i_format.rt >> 2); 184 bit = (insn.i_format.rt >> 2);
185 bit += (bit != 0); 185 bit += (bit != 0);
186 bit += 23; 186 bit += 23;
187 switch (insn.i_format.rt) { 187 switch (insn.i_format.rt & 3) {
188 case 0: /* bc1f */ 188 case 0: /* bc1f */
189 case 2: /* bc1fl */ 189 case 2: /* bc1fl */
190 if (~fcr31 & (1 << bit)) 190 if (~fcr31 & (1 << bit))