+2005-10-26 Bernhard Held <bernhard AT bernhardheld.de>
+
+ * src/mcs51/gen.c (genMinus): fixed bug 1270906: reverse subtraction,
+ carry must be complemented too
+ * src/mcs51/peeph.def: addded rule 262 to remove double cpl c, which
+ could be emitted by genMinus
+
2005-10-25 Bernhard Held <bernhard AT bernhardheld.de>
* src/SDCCast.c (addCast): added promotion for bit variables
emitcode ("subb", "a,b");
popB (pushedB);
} else {
+ /* reverse subtraction with 2's complement */
+ if (offset == 0)
+ emitcode( "setb", "c");
+ else
+ emitcode( "cpl", "c");
wassertl(!aopGetUsesAcc(leftOp, offset), "accumulator clash");
MOVA (aopGet(rightOp, offset, FALSE, TRUE));
- if (offset == 0) {
- emitcode( "setb", "c");
- }
emitcode("subb", "a,%s", aopGet(leftOp, offset, FALSE, TRUE));
emitcode("cpl", "a");
+ if (size) /* skip if last byte */
+ emitcode( "cpl", "c");
}
} else {
MOVA (aopGet (leftOp, offset, FALSE, FALSE));