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softfloat: Remove which from parts_pick_nan_muladd

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Assign the pointer return value to 'a' directly,
rather than going through an intermediary index.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20241203203949.483774-5-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2024-12-11 15:31:08 +00:00 • committed by Peter Maydell
parent e002861876
commit 229416c67e
1 changed files with 10 additions and 22 deletions
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32
fpu/softfloat-parts.c.inc
View file

@ -65,9 +65,9 @@ static FloatPartsN *partsN(pick_nan_muladd)(FloatPartsN *a, FloatPartsN *b,
FloatPartsN *c, float_status *s, FloatPartsN *c, float_status *s,
int ab_mask, int abc_mask) int ab_mask, int abc_mask)
{ {
int which;
bool infzero = (ab_mask == float_cmask_infzero); bool infzero = (ab_mask == float_cmask_infzero);
bool have_snan = (abc_mask & float_cmask_snan); bool have_snan = (abc_mask & float_cmask_snan);
FloatPartsN *ret;
if (unlikely(have_snan)) { if (unlikely(have_snan)) {
float_raise(float_flag_invalid | float_flag_invalid_snan, s); float_raise(float_flag_invalid | float_flag_invalid_snan, s);
@ -104,42 +104,30 @@ static FloatPartsN *partsN(pick_nan_muladd)(FloatPartsN *a, FloatPartsN *b,
default: default:
g_assert_not_reached(); g_assert_not_reached();
} }
which = 2; ret = c;
} else { } else {
FloatClass cls[3] = { a->cls, b->cls, c->cls }; FloatPartsN *val[3] = { a, b, c };
Float3NaNPropRule rule = s->float_3nan_prop_rule; Float3NaNPropRule rule = s->float_3nan_prop_rule;
assert(rule != float_3nan_prop_none); assert(rule != float_3nan_prop_none);
if (have_snan && (rule & R_3NAN_SNAN_MASK)) { if (have_snan && (rule & R_3NAN_SNAN_MASK)) {
/* We have at least one SNaN input and should prefer it */ /* We have at least one SNaN input and should prefer it */
do { do {
which = rule & R_3NAN_1ST_MASK; ret = val[rule & R_3NAN_1ST_MASK];
rule >>= R_3NAN_1ST_LENGTH; rule >>= R_3NAN_1ST_LENGTH;
} while (!is_snan(cls[which])); } while (!is_snan(ret->cls));
} else { } else {
do { do {
which = rule & R_3NAN_1ST_MASK; ret = val[rule & R_3NAN_1ST_MASK];
rule >>= R_3NAN_1ST_LENGTH; rule >>= R_3NAN_1ST_LENGTH;
} while (!is_nan(cls[which])); } while (!is_nan(ret->cls));
} }
} }
switch (which) { if (is_snan(ret->cls)) {
case 0: parts_silence_nan(ret, s);
break;
case 1:
a = b;
break;
case 2:
a = c;
break;
default:
g_assert_not_reached();
} }
if (is_snan(a->cls)) { return ret;
parts_silence_nan(a, s);
}
return a;
default_nan: default_nan:
parts_default_nan(a, s); parts_default_nan(a, s);