diff options
Diffstat (limited to 'target/s390x/fpu_helper.c')
| -rw-r--r-- | target/s390x/fpu_helper.c | 85 |
1 files changed, 35 insertions, 50 deletions
diff --git a/target/s390x/fpu_helper.c b/target/s390x/fpu_helper.c index e921172bc4..0e9247bf7e 100644 --- a/target/s390x/fpu_helper.c +++ b/target/s390x/fpu_helper.c @@ -645,67 +645,52 @@ uint64_t HELPER(msdb)(CPUS390XState *env, uint64_t f1, return ret; } +/* The rightmost bit has the number 11. */ +static inline uint16_t dcmask(int bit, bool neg) +{ + return 1 << (11 - bit - neg); +} + +#define DEF_FLOAT_DCMASK(_TYPE) \ +static uint16_t _TYPE##_dcmask(CPUS390XState *env, _TYPE f1) \ +{ \ + const bool neg = _TYPE##_is_neg(f1); \ + \ + /* Sorted by most common cases - only one class is possible */ \ + if (_TYPE##_is_normal(f1)) { \ + return dcmask(2, neg); \ + } else if (_TYPE##_is_zero(f1)) { \ + return dcmask(0, neg); \ + } else if (_TYPE##_is_denormal(f1)) { \ + return dcmask(4, neg); \ + } else if (_TYPE##_is_infinity(f1)) { \ + return dcmask(6, neg); \ + } else if (_TYPE##_is_quiet_nan(f1, &env->fpu_status)) { \ + return dcmask(8, neg); \ + } \ + /* signaling nan, as last remaining case */ \ + return dcmask(10, neg); \ +} +DEF_FLOAT_DCMASK(float32) +DEF_FLOAT_DCMASK(float64) +DEF_FLOAT_DCMASK(float128) + /* test data class 32-bit */ uint32_t HELPER(tceb)(CPUS390XState *env, uint64_t f1, uint64_t m2) { - float32 v1 = f1; - int neg = float32_is_neg(v1); - uint32_t cc = 0; - - if ((float32_is_zero(v1) && (m2 & (1 << (11-neg)))) || - (float32_is_infinity(v1) && (m2 & (1 << (5-neg)))) || - (float32_is_any_nan(v1) && (m2 & (1 << (3-neg)))) || - (float32_is_signaling_nan(v1, &env->fpu_status) && - (m2 & (1 << (1-neg))))) { - cc = 1; - } else if (m2 & (1 << (9-neg))) { - /* assume normalized number */ - cc = 1; - } - /* FIXME: denormalized? */ - return cc; + return (m2 & float32_dcmask(env, f1)) != 0; } /* test data class 64-bit */ uint32_t HELPER(tcdb)(CPUS390XState *env, uint64_t v1, uint64_t m2) { - int neg = float64_is_neg(v1); - uint32_t cc = 0; - - if ((float64_is_zero(v1) && (m2 & (1 << (11-neg)))) || - (float64_is_infinity(v1) && (m2 & (1 << (5-neg)))) || - (float64_is_any_nan(v1) && (m2 & (1 << (3-neg)))) || - (float64_is_signaling_nan(v1, &env->fpu_status) && - (m2 & (1 << (1-neg))))) { - cc = 1; - } else if (m2 & (1 << (9-neg))) { - /* assume normalized number */ - cc = 1; - } - /* FIXME: denormalized? */ - return cc; + return (m2 & float64_dcmask(env, v1)) != 0; } /* test data class 128-bit */ -uint32_t HELPER(tcxb)(CPUS390XState *env, uint64_t ah, - uint64_t al, uint64_t m2) -{ - float128 v1 = make_float128(ah, al); - int neg = float128_is_neg(v1); - uint32_t cc = 0; - - if ((float128_is_zero(v1) && (m2 & (1 << (11-neg)))) || - (float128_is_infinity(v1) && (m2 & (1 << (5-neg)))) || - (float128_is_any_nan(v1) && (m2 & (1 << (3-neg)))) || - (float128_is_signaling_nan(v1, &env->fpu_status) && - (m2 & (1 << (1-neg))))) { - cc = 1; - } else if (m2 & (1 << (9-neg))) { - /* assume normalized number */ - cc = 1; - } - /* FIXME: denormalized? */ - return cc; +uint32_t HELPER(tcxb)(CPUS390XState *env, uint64_t ah, uint64_t al, uint64_t m2) +{ + return (m2 & float128_dcmask(env, make_float128(ah, al))) != 0; } /* square root 32-bit */ |