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Fix big_int_shr for arithmetic shift (i.e. negative numbers)

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gingerBill
2026-07-12 00:04:35 +01:00
parent 3ea134a86a
commit 51bc27be01
1 changed files with 9 additions and 3 deletions
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12
src/big_int.cpp
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@@ -353,9 +353,15 @@ gb_internal void big_int_shl(BigInt *dst, BigInt const *x, BigInt const *y) {
gb_internal void big_int_shr(BigInt *dst, BigInt const *x, BigInt const *y) {
u32 yy = mp_get_u32(y);
BigInt d = {};
mp_div_2d(x, yy, dst, &d);
big_int_dealloc(&d);
BigInt rem = {};
defer (mp_clear(&rem));
mp_div_2d(x, yy, dst, &rem);
if (mp_isneg(x) && !mp_iszero(&rem)) {
mp_sub_d(dst, 1, dst);
}
}
gb_internal void big_int_mul_u64(BigInt *dst, BigInt const *x, u64 y) {