diff options
Diffstat (limited to 'Include/longintrepr.h')
| -rw-r--r-- | Include/longintrepr.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/Include/longintrepr.h b/Include/longintrepr.h index 5755adb..9ed1fe7 100644 --- a/Include/longintrepr.h +++ b/Include/longintrepr.h @@ -12,7 +12,7 @@ extern "C" { contains at least 16 bits, but it's made changeable anyway. Note: 'digit' should be able to hold 2*MASK+1, and 'twodigits' should be able to hold the intermediate results in 'mul' - (at most MASK << SHIFT). + (at most (BASE-1)*(2*BASE+1) == MASK*(2*MASK+3)). Also, x_sub assumes that 'digit' is an unsigned type, and overflow is handled by taking the result mod 2**N for some N > SHIFT. And, at some places it is assumed that MASK fits in an int, as well. */ |