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softfloat: Add flag specific to convert non-nan to int

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PowerPC has this flag, and it's easier to compute it here
than after the fact.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20211119160502.17432-7-richard.henderson@linaro.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
This commit is contained in:
Richard Henderson 2021-12-17 17:57:14 +01:00 committed by Cédric Le Goater
parent f8718aab89
commit 81254b02eb
2 changed files with 8 additions and 7 deletions
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14
fpu/softfloat-parts.c.inc
View file

@ -1055,7 +1055,7 @@ static int64_t partsN(float_to_sint)(FloatPartsN *p, FloatRoundMode rmode,
break;
case float_class_inf:
flags = float_flag_invalid;
flags = float_flag_invalid | float_flag_invalid_cvti;
r = p->sign ? min : max;
break;
@ -1077,11 +1077,11 @@ static int64_t partsN(float_to_sint)(FloatPartsN *p, FloatRoundMode rmode,
if (r <= -(uint64_t)min) {
r = -r;
} else {
flags = float_flag_invalid;
flags = float_flag_invalid | float_flag_invalid_cvti;
r = min;
}
} else if (r > max) {
flags = float_flag_invalid;
flags = float_flag_invalid | float_flag_invalid_cvti;
r = max;
}
break;
@ -1120,7 +1120,7 @@ static uint64_t partsN(float_to_uint)(FloatPartsN *p, FloatRoundMode rmode,
break;
case float_class_inf:
flags = float_flag_invalid;
flags = float_flag_invalid | float_flag_invalid_cvti;
r = p->sign ? 0 : max;
break;
@ -1138,15 +1138,15 @@ static uint64_t partsN(float_to_uint)(FloatPartsN *p, FloatRoundMode rmode,
}
if (p->sign) {
flags = float_flag_invalid;
flags = float_flag_invalid | float_flag_invalid_cvti;
r = 0;
} else if (p->exp > DECOMPOSED_BINARY_POINT) {
flags = float_flag_invalid;
flags = float_flag_invalid | float_flag_invalid_cvti;
r = max;
} else {
r = p->frac_hi >> (DECOMPOSED_BINARY_POINT - p->exp);
if (r > max) {
flags = float_flag_invalid;
flags = float_flag_invalid | float_flag_invalid_cvti;
r = max;
}
}

1
include/fpu/softfloat-types.h
View file

@ -157,6 +157,7 @@ enum {
float_flag_invalid_idi = 0x0200, /* inf / inf */
float_flag_invalid_zdz = 0x0400, /* 0 / 0 */
float_flag_invalid_sqrt = 0x0800, /* sqrt(-x) */
float_flag_invalid_cvti = 0x1000, /* non-nan to integer */
};
/*