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softfloat: Replace WHICH with RET in parts_pick_nan

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Replace the "index" selecting between A and B with a result variable
of the proper type.  This improves clarity within the function.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20241203203949.483774-12-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2024-12-11 15:31:09 +00:00 • committed by Peter Maydell
parent 9778115ed7
commit cc87d3d381
1 changed files with 13 additions and 15 deletions
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28
fpu/softfloat-parts.c.inc
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@ -40,7 +40,8 @@ static FloatPartsN *partsN(pick_nan)(FloatPartsN *a, FloatPartsN *b,
float_status *s)
{
bool have_snan = false;
int cmp, which;
FloatPartsN *ret;
int cmp;
if (is_snan(a->cls) || is_snan(b->cls)) {
float_raise(float_flag_invalid | float_flag_invalid_snan, s);
@ -55,21 +56,21 @@ static FloatPartsN *partsN(pick_nan)(FloatPartsN *a, FloatPartsN *b,
switch (s->float_2nan_prop_rule) {
case float_2nan_prop_s_ab:
if (have_snan) {
which = is_snan(a->cls) ? 0 : 1;
ret = is_snan(a->cls) ? a : b;
break;
}
/* fall through */
case float_2nan_prop_ab:
which = is_nan(a->cls) ? 0 : 1;
ret = is_nan(a->cls) ? a : b;
break;
case float_2nan_prop_s_ba:
if (have_snan) {
which = is_snan(b->cls) ? 1 : 0;
ret = is_snan(b->cls) ? b : a;
break;
}
/* fall through */
case float_2nan_prop_ba:
which = is_nan(b->cls) ? 1 : 0;
ret = is_nan(b->cls) ? b : a;
break;
case float_2nan_prop_x87:
/*
@ -85,35 +86,32 @@ static FloatPartsN *partsN(pick_nan)(FloatPartsN *a, FloatPartsN *b,
*/
if (is_snan(a->cls)) {
if (!is_snan(b->cls)) {
which = is_qnan(b->cls) ? 1 : 0;
ret = is_qnan(b->cls) ? b : a;
break;
}
} else if (is_qnan(a->cls)) {
if (is_snan(b->cls) || !is_qnan(b->cls)) {
which = 0;
ret = a;
break;
}
} else {
which = 1;
ret = b;
break;
}
cmp = frac_cmp(a, b);
if (cmp == 0) {
cmp = a->sign < b->sign;
}
which = cmp > 0 ? 0 : 1;
ret = cmp > 0 ? a : b;
break;
default:
g_assert_not_reached();
}
if (which) {
a = b;
if (is_snan(ret->cls)) {
parts_silence_nan(ret, s);
}
if (is_snan(a->cls)) {
parts_silence_nan(a, s);
}
return a;
return ret;
}
static FloatPartsN *partsN(pick_nan_muladd)(FloatPartsN *a, FloatPartsN *b,