diff options
Diffstat (limited to 'target-mips/op_helper.c')
| -rw-r--r-- | target-mips/op_helper.c | 41 |
1 files changed, 38 insertions, 3 deletions
diff --git a/target-mips/op_helper.c b/target-mips/op_helper.c index eaf4d2621a..2ef6633f47 100644 --- a/target-mips/op_helper.c +++ b/target-mips/op_helper.c @@ -2199,12 +2199,23 @@ static inline void restore_flush_mode(CPUMIPSState *env) target_ulong helper_cfc1(CPUMIPSState *env, uint32_t reg) { - target_ulong arg1; + target_ulong arg1 = 0; switch (reg) { case 0: arg1 = (int32_t)env->active_fpu.fcr0; break; + case 1: + /* UFR Support - Read Status FR */ + if (env->active_fpu.fcr0 & (1 << FCR0_UFRP)) { + if (env->CP0_Config5 & (1 << CP0C5_UFR)) { + arg1 = (int32_t) + ((env->CP0_Status & (1 << CP0St_FR)) >> CP0St_FR); + } else { + helper_raise_exception(env, EXCP_RI); + } + } + break; case 25: arg1 = ((env->active_fpu.fcr31 >> 24) & 0xfe) | ((env->active_fpu.fcr31 >> 23) & 0x1); break; @@ -2222,9 +2233,33 @@ target_ulong helper_cfc1(CPUMIPSState *env, uint32_t reg) return arg1; } -void helper_ctc1(CPUMIPSState *env, target_ulong arg1, uint32_t reg) +void helper_ctc1(CPUMIPSState *env, target_ulong arg1, uint32_t fs, uint32_t rt) { - switch(reg) { + switch (fs) { + case 1: + /* UFR Alias - Reset Status FR */ + if (!((env->active_fpu.fcr0 & (1 << FCR0_UFRP)) && (rt == 0))) { + return; + } + if (env->CP0_Config5 & (1 << CP0C5_UFR)) { + env->CP0_Status &= ~(1 << CP0St_FR); + compute_hflags(env); + } else { + helper_raise_exception(env, EXCP_RI); + } + break; + case 4: + /* UNFR Alias - Set Status FR */ + if (!((env->active_fpu.fcr0 & (1 << FCR0_UFRP)) && (rt == 0))) { + return; + } + if (env->CP0_Config5 & (1 << CP0C5_UFR)) { + env->CP0_Status |= (1 << CP0St_FR); + compute_hflags(env); + } else { + helper_raise_exception(env, EXCP_RI); + } + break; case 25: if (arg1 & 0xffffff00) return; |