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py/objfloat: Fix abs(-0.0) so it returns 0.0.

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Nan and inf (signed and unsigned) are also handled correctly by using
signbit (they were also handled correctly with "val<0", but that didn't
handle -0.0 correctly).  A test case is added for this behaviour.
This commit is contained in:
Damien George
2018-09-27 15:21:25 +10:00
parent 8960a28238
commit b3eadf3f3d
2 changed files with 14 additions and 2 deletions
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3
py/objfloat.c
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@@ -161,8 +161,7 @@ STATIC mp_obj_t float_unary_op(mp_unary_op_t op, mp_obj_t o_in) {
case MP_UNARY_OP_POSITIVE: return o_in;
case MP_UNARY_OP_NEGATIVE: return mp_obj_new_float(-val);
case MP_UNARY_OP_ABS: {
// TODO check for NaN etc
if (val < 0) {
if (signbit(val)) {
return mp_obj_new_float(-val);
} else {
return o_in;