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stage1: fix bigint_init_bigfloat for single-limb negative floats

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Fixes #10592.
This commit is contained in:
Marc Tiehuis 2022-01-15 02:52:34 +13:00 committed by Andrew Kelley
parent dafbc6eb25
commit 06ae13fe35
2 changed files with 7 additions and 1 deletions
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2
src/stage1/bigint.cpp
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@ -219,7 +219,7 @@ void bigint_init_bigfloat(BigInt *dest, const BigFloat *op) {
ui64_to_f128M(UINT64_MAX, &max_u64); ui64_to_f128M(UINT64_MAX, &max_u64);
if (f128M_le(&abs_val, &max_u64)) { if (f128M_le(&abs_val, &max_u64)) {
dest->digit_count = 1; dest->digit_count = 1;
dest->data.digit = f128M_to_ui64(&op->value, softfloat_round_minMag, false); dest->data.digit = f128M_to_ui64(&abs_val, softfloat_round_minMag, false);
bigint_normalize(dest); bigint_normalize(dest);
return; return;
} }

6
test/behavior/floatop.zig
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@ -66,3 +66,9 @@ fn testDifferentSizedFloatComparisons() !void {
// try expect(@nearbyint(a) == -4); // try expect(@nearbyint(a) == -4);
// } // }
//} //}
test "negative f128 floatToInt at compile-time" {
const a: f128 = -2;
var b = @floatToInt(i64, a);
try expect(@as(i64, -2) == b);
}