From: Michel Pollet <buserror@gmail.com>
Date: Wed, 14 Apr 2010 19:42:46 +0000 (+0100)
Subject: core: Fixes SBCI
X-Git-Tag: v1.0a3~5
X-Git-Url: https://git.htl-mechatronik.at/public/?a=commitdiff_plain;h=f04a4a3c073b0f97039daa51c563ded9afb4a5d5;p=sx%2Fsimavr.git

core: Fixes SBCI

Thanks to <evgeny.chukreev@gmail.com>

Signed-off-by: Michel Pollet <buserror@gmail.com>
---

diff --git a/simavr/sim/sim_core.c b/simavr/sim/sim_core.c
index 1ccae6b..3901ede 100644
--- a/simavr/sim/sim_core.c
+++ b/simavr/sim/sim_core.c
@@ -707,7 +707,8 @@ uint16_t avr_run_one(avr_t * avr)
 			uint8_t res = vr - k - avr->sreg[S_C];
 			STATE("sbci %s[%02x], 0x%02x = %02x\n", avr_regname(r), avr->data[r], k, res);
 			_avr_set_r(avr, r, res);
-			avr->sreg[S_Z] = res  == 0;
+			if (res)
+				avr->sreg[S_Z] = 0;
 			avr->sreg[S_N] = (res >> 7) & 1;
 			avr->sreg[S_C] = (k + avr->sreg[S_C]) > vr;
 			avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V];