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author | 2012-07-04 13:13:55 -0700 | |
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committer | 2012-07-04 13:13:55 -0700 | |
commit | 404c3bc30cb1361e1b3533643326ab472d24a618 (patch) | |
tree | 156cc9032c8aee17167d926c5bdae009ba8f36d2 /arch/sparc/math-emu | |
parent | Input: wacom - TPC2FG doesn't store touch id for slots (diff) | |
parent | Linux 3.5-rc5 (diff) | |
download | linux-dev-404c3bc30cb1361e1b3533643326ab472d24a618.tar.xz linux-dev-404c3bc30cb1361e1b3533643326ab472d24a618.zip |
Merge commit 'v3.5-rc5' into next
Diffstat (limited to 'arch/sparc/math-emu')
-rw-r--r-- | arch/sparc/math-emu/math_64.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/arch/sparc/math-emu/math_64.c b/arch/sparc/math-emu/math_64.c index 2bbe2f28ad23..1704068da928 100644 --- a/arch/sparc/math-emu/math_64.c +++ b/arch/sparc/math-emu/math_64.c @@ -163,7 +163,7 @@ typedef union { u64 q[2]; } *argp; -int do_mathemu(struct pt_regs *regs, struct fpustate *f) +int do_mathemu(struct pt_regs *regs, struct fpustate *f, bool illegal_insn_trap) { unsigned long pc = regs->tpc; unsigned long tstate = regs->tstate; @@ -218,7 +218,7 @@ int do_mathemu(struct pt_regs *regs, struct fpustate *f) case FSQRTS: { unsigned long x = current_thread_info()->xfsr[0]; - x = (x >> 14) & 0xf; + x = (x >> 14) & 0x7; TYPE(x,1,1,1,1,0,0); break; } @@ -226,7 +226,7 @@ int do_mathemu(struct pt_regs *regs, struct fpustate *f) case FSQRTD: { unsigned long x = current_thread_info()->xfsr[0]; - x = (x >> 14) & 0xf; + x = (x >> 14) & 0x7; TYPE(x,2,1,2,1,0,0); break; } @@ -357,9 +357,17 @@ int do_mathemu(struct pt_regs *regs, struct fpustate *f) if (type) { argp rs1 = NULL, rs2 = NULL, rd = NULL; - freg = (current_thread_info()->xfsr[0] >> 14) & 0xf; - if (freg != (type >> 9)) - goto err; + /* Starting with UltraSPARC-T2, the cpu does not set the FP Trap + * Type field in the %fsr to unimplemented_FPop. Nor does it + * use the fp_exception_other trap. Instead it signals an + * illegal instruction and leaves the FP trap type field of + * the %fsr unchanged. + */ + if (!illegal_insn_trap) { + int ftt = (current_thread_info()->xfsr[0] >> 14) & 0x7; + if (ftt != (type >> 9)) + goto err; + } current_thread_info()->xfsr[0] &= ~0x1c000; freg = ((insn >> 14) & 0x1f); switch (type & 0x3) { |