// Get the encoding of the saved registers when we have a frame pointer.
uint32_t RegEnc = encodeCompactUnwindRegistersWithFrame(SavedRegs, Is64Bit);
- if (RegEnc == ~0U)
- return 0;
+ if (RegEnc == ~0U) return 0;
CompactUnwindEncoding |= 0x01000000;
CompactUnwindEncoding |= (CFAOffset & 0xFF) << 16;
CompactUnwindEncoding |= RegEnc & 0x7FFF;
} else {
- unsigned FullOffset = CFAOffset + StackAdjust;
- if ((FullOffset & 0xFF) == FullOffset) {
- // Frameless stack.
+ if ((CFAOffset & 0xFF) == CFAOffset) {
+ // Frameless stack with a small stack size.
CompactUnwindEncoding |= 0x02000000;
+
+ // Encode the stack size.
CompactUnwindEncoding |= (CFAOffset & 0xFF) << 16;
} else {
if ((CFAOffset & 0x7) != CFAOffset)
CompactUnwindEncoding |= (CFAOffset & 0x7) << 13;
}
+ // Encode the number of registers saved.
CompactUnwindEncoding |= ((6 - SavedRegIdx) & 0x7) << 10;
// Get the encoding of the saved registers when we don't have a frame
6 - SavedRegIdx,
Is64Bit);
if (RegEnc == ~0U) return 0;
+
+ // Encode the register encoding.
CompactUnwindEncoding |= RegEnc & 0x3FF;
}