diff options
| author | Richard Henderson <richard.henderson@linaro.org> | 2019-04-26 15:20:51 -0700 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2019-05-19 07:30:03 -0700 |
| commit | 21ba856499f9c0ccdc05ed04432df059ae76b337 (patch) | |
| tree | 6abdfdcadf3436ae79faf616c47f5f8fdd41d7f7 /target/alpha/cpu.h | |
| parent | 4a24793290e3ae08025a9a310ad74c773816d069 (diff) | |
target/alpha: Fix user-only floating-point exceptions
Record the software fp control register, as set by the
osf_setsysinfo syscall. Add those masked exceptions
to fpcr_exc_enable. Do not raise a signal for masked
fp exceptions.
Fixes: https://bugs.launchpad.net/bugs/1701835
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'target/alpha/cpu.h')
| -rw-r--r-- | target/alpha/cpu.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/target/alpha/cpu.h b/target/alpha/cpu.h index cf09112b6a..ba6bc31b15 100644 --- a/target/alpha/cpu.h +++ b/target/alpha/cpu.h @@ -198,6 +198,8 @@ enum { #define SWCR_STATUS_DNO (1U << 22) #define SWCR_STATUS_MASK ((1U << 23) - (1U << 17)) +#define SWCR_STATUS_TO_EXCSUM_SHIFT 16 + #define SWCR_MASK (SWCR_TRAP_ENABLE_MASK | SWCR_MAP_MASK | SWCR_STATUS_MASK) /* MMU modes definitions */ @@ -235,6 +237,9 @@ struct CPUAlphaState { /* The FPCR, and disassembled portions thereof. */ uint32_t fpcr; +#ifdef CONFIG_USER_ONLY + uint32_t swcr; +#endif uint32_t fpcr_exc_enable; float_status fp_status; uint8_t fpcr_dyn_round; @@ -501,4 +506,41 @@ static inline void cpu_get_tb_cpu_state(CPUAlphaState *env, target_ulong *pc, *pflags = env->flags & ENV_FLAG_TB_MASK; } +#ifdef CONFIG_USER_ONLY +/* Copied from linux ieee_swcr_to_fpcr. */ +static inline uint64_t alpha_ieee_swcr_to_fpcr(uint64_t swcr) +{ + uint64_t fpcr = 0; + + fpcr |= (swcr & SWCR_STATUS_MASK) << 35; + fpcr |= (swcr & SWCR_MAP_DMZ) << 36; + fpcr |= (~swcr & (SWCR_TRAP_ENABLE_INV + | SWCR_TRAP_ENABLE_DZE + | SWCR_TRAP_ENABLE_OVF)) << 48; + fpcr |= (~swcr & (SWCR_TRAP_ENABLE_UNF + | SWCR_TRAP_ENABLE_INE)) << 57; + fpcr |= (swcr & SWCR_MAP_UMZ ? FPCR_UNDZ | FPCR_UNFD : 0); + fpcr |= (~swcr & SWCR_TRAP_ENABLE_DNO) << 41; + + return fpcr; +} + +/* Copied from linux ieee_fpcr_to_swcr. */ +static inline uint64_t alpha_ieee_fpcr_to_swcr(uint64_t fpcr) +{ + uint64_t swcr = 0; + + swcr |= (fpcr >> 35) & SWCR_STATUS_MASK; + swcr |= (fpcr >> 36) & SWCR_MAP_DMZ; + swcr |= (~fpcr >> 48) & (SWCR_TRAP_ENABLE_INV + | SWCR_TRAP_ENABLE_DZE + | SWCR_TRAP_ENABLE_OVF); + swcr |= (~fpcr >> 57) & (SWCR_TRAP_ENABLE_UNF | SWCR_TRAP_ENABLE_INE); + swcr |= (fpcr >> 47) & SWCR_MAP_UMZ; + swcr |= (~fpcr >> 41) & SWCR_TRAP_ENABLE_DNO; + + return swcr; +} +#endif /* CONFIG_USER_ONLY */ + #endif /* ALPHA_CPU_H */ |