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softfloat: Define misc operations for bfloat16

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Signed-off-by: LIU Zhiwei <zhiwei_liu@c-sky.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200813071421.2509-4-zhiwei_liu@c-sky.com>
[rth: Fix merge conflict with NO_SIGNALING_NANS; use bool for predicates.]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
LIU Zhiwei 2020-08-13 15:14:21 +08:00 • committed by Richard Henderson
parent 34f0c0a98a
commit 5ebf5f4be6
2 changed files with 86 additions and 0 deletions
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38
fpu/softfloat-specialize.c.inc
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@ -265,6 +265,25 @@ bool float16_is_quiet_nan(float16 a_, float_status *status)
}
}
/*----------------------------------------------------------------------------
| Returns 1 if the bfloat16 value `a' is a quiet
| NaN; otherwise returns 0.
*----------------------------------------------------------------------------*/
bool bfloat16_is_quiet_nan(bfloat16 a_, float_status *status)
{
if (no_signaling_nans(status)) {
return bfloat16_is_any_nan(a_);
} else {
uint16_t a = a_;
if (snan_bit_is_one(status)) {
return (((a >> 6) & 0x1FF) == 0x1FE) && (a & 0x3F);
} else {
return ((a >> 6) & 0x1FF) == 0x1FF;
}
}
}
/*----------------------------------------------------------------------------
| Returns 1 if the half-precision floating-point value `a' is a signaling
| NaN; otherwise returns 0.
@ -284,6 +303,25 @@ bool float16_is_signaling_nan(float16 a_, float_status *status)
}
}
/*----------------------------------------------------------------------------
| Returns 1 if the bfloat16 value `a' is a signaling
| NaN; otherwise returns 0.
*----------------------------------------------------------------------------*/
bool bfloat16_is_signaling_nan(bfloat16 a_, float_status *status)
{
if (no_signaling_nans(status)) {
return 0;
} else {
uint16_t a = a_;
if (snan_bit_is_one(status)) {
return ((a >> 6) & 0x1FF) == 0x1FF;
} else {
return (((a >> 6) & 0x1FF) == 0x1FE) && (a & 0x3F);
}
}
}
/*----------------------------------------------------------------------------
| Returns 1 if the single-precision floating-point value `a' is a quiet
| NaN; otherwise returns 0.