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softfloat: Add flags specific to Inf / Inf and 0 / 0 

PowerPC has these flags, and it's easier to compute them here
than after the fact.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20211119160502.17432-5-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 bead3c9b0f
commit 10cc964030
2 changed files with 13 additions and 5 deletions
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16
fpu/softfloat-parts.c.inc
View File

@ -590,11 +590,13 @@ static FloatPartsN *partsN(div)(FloatPartsN *a, FloatPartsN *b,
}
/* 0/0 or Inf/Inf => NaN */
if (unlikely(ab_mask == float_cmask_zero) ||
unlikely(ab_mask == float_cmask_inf)) {
float_raise(float_flag_invalid, s);
parts_default_nan(a, s);
return a;
if (unlikely(ab_mask == float_cmask_zero)) {
float_raise(float_flag_invalid | float_flag_invalid_zdz, s);
goto d_nan;
}
if (unlikely(ab_mask == float_cmask_inf)) {
float_raise(float_flag_invalid | float_flag_invalid_idi, s);
goto d_nan;
}
/* All the NaN cases */
@ -625,6 +627,10 @@ static FloatPartsN *partsN(div)(FloatPartsN *a, FloatPartsN *b,
float_raise(float_flag_divbyzero, s);
a->cls = float_class_inf;
return a;
d_nan:
parts_default_nan(a, s);
return a;
}
/*

2
include/fpu/softfloat-types.h
View File

@ -154,6 +154,8 @@ enum {
float_flag_output_denormal = 0x0040,
float_flag_invalid_isi = 0x0080, /* inf - inf */
float_flag_invalid_imz = 0x0100, /* inf * 0 */
float_flag_invalid_idi = 0x0200, /* inf / inf */
float_flag_invalid_zdz = 0x0400, /* 0 / 0 */
};
/*