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std.fmt.parseFloat: fix hex-float negative inf

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Closes #24111.
This commit is contained in:
Marc Tiehuis 2025-06-08 14:32:16 +12:00 committed by Andrew Kelley
parent 201c0f54a5
commit cffa98eef5
2 changed files with 4 additions and 1 deletions
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3
lib/std/fmt/parse_float.zig
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@ -159,6 +159,9 @@ test "hex.special" {
try testing.expect(math.isPositiveInf(try parseFloat(f32, "iNf")));
try testing.expect(math.isPositiveInf(try parseFloat(f32, "+Inf")));
try testing.expect(math.isNegativeInf(try parseFloat(f32, "-iNf")));
try testing.expect(math.isPositiveInf(try parseFloat(f32, "0x9999p9999")));
try testing.expect(math.isNegativeInf(try parseFloat(f32, "-0x9999p9999")));
}
test "hex.zero" {

2
lib/std/fmt/parse_float/convert_hex.zig
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@ -78,7 +78,7 @@ pub fn convertHex(comptime T: type, n_: Number(T)) T {
// Infinity and range error
if (n.exponent > max_exp) {
return math.inf(T);
return if (n.negative) -math.inf(T) else math.inf(T);
}
var bits = n.mantissa & ((1 << mantissa_bits) - 1);