diff options
Diffstat (limited to 'arch/mips/include/asm/fpu_emulator.h')
| -rw-r--r-- | arch/mips/include/asm/fpu_emulator.h | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/arch/mips/include/asm/fpu_emulator.h b/arch/mips/include/asm/fpu_emulator.h index aecada6f611..0195745b4b1 100644 --- a/arch/mips/include/asm/fpu_emulator.h +++ b/arch/mips/include/asm/fpu_emulator.h @@ -23,9 +23,12 @@ #ifndef _ASM_FPU_EMULATOR_H #define _ASM_FPU_EMULATOR_H +#include <linux/sched.h> #include <asm/break.h> +#include <asm/thread_info.h> #include <asm/inst.h> #include <asm/local.h> +#include <asm/processor.h> #ifdef CONFIG_DEBUG_FS @@ -36,12 +39,21 @@ struct mips_fpu_emulator_stats { local_t cp1ops; local_t cp1xops; local_t errors; + local_t ieee754_inexact; + local_t ieee754_underflow; + local_t ieee754_overflow; + local_t ieee754_zerodiv; + local_t ieee754_invalidop; }; DECLARE_PER_CPU(struct mips_fpu_emulator_stats, fpuemustats); #define MIPS_FPU_EMU_INC_STATS(M) \ - cpu_local_wrap(__local_inc(&__get_cpu_var(fpuemustats).M)) +do { \ + preempt_disable(); \ + __local_inc(&__get_cpu_var(fpuemustats).M); \ + preempt_enable(); \ +} while (0) #else #define MIPS_FPU_EMU_INC_STATS(M) do { } while (0) @@ -50,6 +62,12 @@ DECLARE_PER_CPU(struct mips_fpu_emulator_stats, fpuemustats); extern int mips_dsemul(struct pt_regs *regs, mips_instruction ir, unsigned long cpc); extern int do_dsemulret(struct pt_regs *xcp); +extern int fpu_emulator_cop1Handler(struct pt_regs *xcp, + struct mips_fpu_struct *ctx, int has_fpu, + void *__user *fault_addr); +int process_fpemu_return(int sig, void __user *fault_addr); +int mm_isBranchInstr(struct pt_regs *regs, struct mm_decoded_insn dec_insn, + unsigned long *contpc); /* * Instruction inserted following the badinst to further tag the sequence @@ -61,4 +79,17 @@ extern int do_dsemulret(struct pt_regs *xcp); */ #define BREAK_MATH (0x0000000d | (BRK_MEMU << 16)) +#define SIGNALLING_NAN 0x7ff800007ff80000LL + +static inline void fpu_emulator_init_fpu(void) +{ + struct task_struct *t = current; + int i; + + t->thread.fpu.fcr31 = 0; + + for (i = 0; i < 32; i++) + set_fpr64(&t->thread.fpu.fpr[i], 0, SIGNALLING_NAN); +} + #endif /* _ASM_FPU_EMULATOR_H */ |