gbdev/rgbds
1
0
Fork 0
mirror of https://github.com/gbdev/rgbds.git synced 2026-09-23 14:17:06 +00:00
Code Issues Packages Projects Releases Wiki Activity

Fix $8000_0000 % -1 to warn with -Wdiv like $8000_0000 / -1 does (#2012)

Browse Source
This commit is contained in:
Rangi
2026-07-06 15:08:44 -04:00
committed by GitHub
parent be3fc61859
commit 46a6966b70
6 changed files with 25 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/opmath.cpp
+5 -1
View File
@@ -6,9 +6,11 @@
#include <stdint.h>
#include "helpers.hpp" // clz, ctz
#include "helpers.hpp" // assume, clz, ctz
int32_t op_divide(int32_t dividend, int32_t divisor) {
assume(divisor != 0); // Division by 0 is UB
assume(dividend != INT32_MIN || divisor != -1); // INT32_MIN / -1 is UB
// Adjust division to floor toward negative infinity,
// not truncate toward zero
int32_t remainder = dividend % divisor;
@@ -16,6 +18,8 @@ int32_t op_divide(int32_t dividend, int32_t divisor) {
}
int32_t op_modulo(int32_t dividend, int32_t divisor) {
assume(divisor != 0); // Modulo by 0 is UB
assume(dividend != INT32_MIN || divisor != -1); // INT32_MIN % -1 is UB
// Adjust modulo to have the sign of the divisor,
// not the sign of the dividend
return static_cast<int32_t>(