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big: Add _private_int_div_recursive.

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This commit is contained in:
Jeroen van Rijn
2021-08-13 23:45:00 +02:00
parent 37be8d4091
commit dc02566a84
3 changed files with 209 additions and 12 deletions
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core/math/big/internal.odin
+14 -2
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@@ -260,6 +260,12 @@ internal_int_add_digit :: proc(dest, a: ^Int, digit: DIGIT, allocator := context
}
internal_add :: proc { internal_int_add_signed, internal_int_add_digit, };
internal_int_incr :: proc(dest: ^Int, allocator := context.allocator) -> (err: Error) {
return #force_inline internal_add(dest, dest, 1);
}
internal_incr :: proc { internal_int_incr, };
/*
Low-level subtraction, dest = number - decrease. Assumes |number| > |decrease|.
Handbook of Applied Cryptography, algorithm 14.9.
@@ -458,6 +464,11 @@ internal_int_sub_digit :: proc(dest, number: ^Int, digit: DIGIT, allocator := co
internal_sub :: proc { internal_int_sub_signed, internal_int_sub_digit, };
internal_int_decr :: proc(dest: ^Int, allocator := context.allocator) -> (err: Error) {
return #force_inline internal_sub(dest, dest, 1);
}
internal_decr :: proc { internal_int_decr, };
/*
dest = src / 2
dest = src >> 1
@@ -718,8 +729,9 @@ internal_int_divmod :: proc(quotient, remainder, numerator, denominator: ^Int, a
return nil;
}
if false && (denominator.used > 2 * MUL_KARATSUBA_CUTOFF) && (denominator.used <= (numerator.used/3) * 2) {
// err = _int_div_recursive(quotient, remainder, numerator, denominator);
if (denominator.used > 2 * MUL_KARATSUBA_CUTOFF) && (denominator.used <= (numerator.used/3) * 2) {
err = _private_int_div_recursive(quotient, remainder, numerator, denominator);
// err = #force_inline _private_int_div_school(quotient, remainder, numerator, denominator);
} else {
when true {
err = #force_inline _private_int_div_school(quotient, remainder, numerator, denominator);