static unsigned long ArrayInIdx =0;static unsigned long ArrayOutIdx =0;void test1(void) { unsigned long idx = ArrayInIdx; // get array index if( -16L+idx-ArrayOutIdx >= 0 ) // not full ? (less than 16) return; ArrayInIdx++; // allocate array element}void test2(void) { unsigned long idx = ArrayInIdx; // get array index if( idx-ArrayOutIdx >= 16L ) // not full ? (less than 16) return; ArrayInIdx++; // allocate array element}static signed long sArrayInIdx =0;static signed long sArrayOutIdx =0;void test3(void) { signed long idx = sArrayInIdx; // get array index if( -16L+idx-sArrayOutIdx >= 0 ) // not full ? (less than 16) return; sArrayInIdx++; // allocate array element}
The test1() function compiles to a single rts, ie. the compiler thinks the condition is always true.
The other two compile as intended.
Am i wrong to assume that the argument of the 'if' always is signed ?
Is the compiler messing up ?
( PS: CW7.2se )
