The last note:
if bitfield in SDCC for the first time crosses byte boundary, it always
starts at bit zero. The strange thing is that second example produces 3
byte long structure (no 4 bytes long) so second byte-boundary crossing
seems working correctly.
// correct
struct {
unsigned int bit1:3;
unsigned int bit2:5;
// byte boundary
unsigned int bit3:7;
unsigned int bit4:1;
} struct1;
// wrong
struct {
unsigned int bit1:3;
// byte boundary, next field doesn't continue in first byte of structure
unsigned int bit2:6;
unsigned int bit3:6;
unsigned int bit4:1;
} struct2;
These two structures don't generate same result: sizeof(struct1) = 2
while sizeof(struct2) = 3...
Hynek
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