CMC implementation is incorrect

[Herohtar]

All the variants of the emulator files have CMC (Complement Carry) implemented as "clear carry":

emulator101/CocoaPart7-Threading/8080emu.c

Line 744 in 0c327a7

case 0x3f: state->cc.cy = 0; break;

It seems the test program (cpudiag.asm) does not catch that specific error and will pass the CPU as operational because it only checks that CMC results in the carry being set from 1 to 0:

STC
CNC	CPUER	;TEST "STC"
CMC
CC	CPUER	;TEST "CMC