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mruby-bigint: remove unused mpn_add_1 and mpn_sub_1 functions

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Co-authored-by: Claude <noreply@anthropic.com>
This commit is contained in:
Yukihiro "Matz" Matsumoto
2026-01-13 14:49:19 +09:00
parent e50f15c1c6
commit 45d483df2f
1 changed files with 0 additions and 56 deletions
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mrbgems/mruby-bigint/core/bigint.c
-56
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@@ -1699,34 +1699,6 @@ mpn_add(mp_limb *rp, const mp_limb *ap, size_t an, const mp_limb *bp, size_t bn)
return (mp_limb)carry;
}
/*
* Add single limb to limb array.
* rp[0..n-1] = ap[0..n-1] + b
* Returns carry (0 or 1).
* Supports in-place operation (rp == ap).
*/
static mp_limb
mpn_add_1(mp_limb *rp, const mp_limb *ap, size_t n, mp_limb b)
{
mp_dbl_limb carry = b;
for (size_t i = 0; i < n; i++) {
carry += (mp_dbl_limb)ap[i];
rp[i] = LOW(carry);
carry = HIGH(carry);
if (carry == 0) {
/* No more carry, copy remaining limbs if needed */
if (rp != ap) {
for (i++; i < n; i++) {
rp[i] = ap[i];
}
}
return 0;
}
}
return (mp_limb)carry;
}
/*
* Subtract two limb arrays of the same size.
* rp[0..n-1] = ap[0..n-1] - bp[0..n-1]
@@ -1772,34 +1744,6 @@ mpn_sub(mp_limb *rp, const mp_limb *ap, size_t an, const mp_limb *bp, size_t bn)
return (mp_limb)(-borrow);
}
/*
* Subtract single limb from limb array.
* rp[0..n-1] = ap[0..n-1] - b
* Returns borrow (0 or 1).
* Supports in-place operation (rp == ap).
*/
static mp_limb
mpn_sub_1(mp_limb *rp, const mp_limb *ap, size_t n, mp_limb b)
{
mp_dbl_limb_signed borrow = -(mp_dbl_limb_signed)b;
for (size_t i = 0; i < n; i++) {
borrow += (mp_dbl_limb_signed)ap[i];
rp[i] = LOW(borrow);
borrow = HIGH(borrow);
if (borrow == 0) {
/* No more borrow, copy remaining limbs if needed */
if (rp != ap) {
for (i++; i < n; i++) {
rp[i] = ap[i];
}
}
return 0;
}
}
return (mp_limb)(-borrow);
}
/* c1 = a>>n */
/* n must be < DIG_SIZE */
static void