hexonal 6c285ba88a Format zero as 0x0p+0 in hexfloat (#4878) ... fmt::format("{:a}", 0.0) produced 0x0p-1022 where printf's %a gives 0x0p+0, and likewise for -0.0, {:A}, {:#a} and any explicit precision. basic_fp::assign maps a zero biased exponent to 1 ("subnormals use biased exponent 1"), which is right for subnormals but not for zero, so format_hexfloat inherited the minimum subnormal exponent for a value whose significand carries no information. Reset the exponent there rather than in assign, which the decimal path shares. A zero significand can only come from +-0: normals get the implicit bit added, and a subnormal has a nonzero significand by definition. So the guard cannot affect anything else, and denorm_min keeps its existing denormalized form (0x0.0000000000001p-1022, asserted in format_double). The five new expectations were taken from printf rather than derived, and all fail without this change.		2026-08-10 09:52:03 -07:00
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fmt	Format zero as 0x0p+0 in hexfloat (#4878)	2026-08-10 09:52:03 -07:00