diff options
Diffstat (limited to 'linux-user')
| -rw-r--r-- | linux-user/syscall.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 5c166928a4..280137da8c 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -9554,9 +9554,25 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1, { CPUMIPSState *env = ((CPUMIPSState *)cpu_env); bool old_fr = env->CP0_Status & (1 << CP0St_FR); + bool old_fre = env->CP0_Config5 & (1 << CP0C5_FRE); bool new_fr = arg2 & TARGET_PR_FP_MODE_FR; bool new_fre = arg2 & TARGET_PR_FP_MODE_FRE; + const unsigned int known_bits = TARGET_PR_FP_MODE_FR | + TARGET_PR_FP_MODE_FRE; + + /* If nothing to change, return right away, successfully. */ + if (old_fr == new_fr && old_fre == new_fre) { + return 0; + } + /* Check the value is valid */ + if (arg2 & ~known_bits) { + return -TARGET_EOPNOTSUPP; + } + /* Setting FRE without FR is not supported. */ + if (new_fre && !new_fr) { + return -TARGET_EOPNOTSUPP; + } if (new_fr && !(env->active_fpu.fcr0 & (1 << FCR0_F64))) { /* FR1 is not supported */ return -TARGET_EOPNOTSUPP; @@ -9586,6 +9602,7 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1, env->hflags |= MIPS_HFLAG_F64; } else { env->CP0_Status &= ~(1 << CP0St_FR); + env->hflags &= ~MIPS_HFLAG_F64; } if (new_fre) { env->CP0_Config5 |= (1 << CP0C5_FRE); @@ -9594,6 +9611,7 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1, } } else { env->CP0_Config5 &= ~(1 << CP0C5_FRE); + env->hflags &= ~MIPS_HFLAG_FRE; } return 0; |