From: Michel Pollet <buserror@gmail.com>
Date: Wed, 10 Jun 2015 20:06:15 +0000 (+0100)
Subject: interrupts: Redone the logic of delivery
X-Git-Tag: v1.6~69
X-Git-Url: https://git.htl-mechatronik.at/public/?a=commitdiff_plain;h=d5f01a7dbdeaac43d37a76ee22494b7b917b452a;p=sx%2Fsimavr.git

interrupts: Redone the logic of delivery

Simplified a few expressions

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

diff --git a/simavr/sim/sim_interrupts.c b/simavr/sim/sim_interrupts.c
index a5e96ff..b153907 100644
--- a/simavr/sim/sim_interrupts.c
+++ b/simavr/sim/sim_interrupts.c
@@ -225,25 +225,21 @@ void
 avr_service_interrupts(
 		avr_t * avr)
 {
-	if (!avr->sreg[S_I])
+	if (!avr->sreg[S_I] || !avr->interrupt_state)
 		return;
 
-	if (avr->interrupt_state) {
-		if (avr->interrupt_state < 0) {
-			avr->interrupt_state++;
-			if (avr->interrupt_state == 0)
-				avr->interrupt_state = avr_has_pending_interrupts(avr);
-			return;
-		}
-	} else
+	if (avr->interrupt_state < 0) {
+		avr->interrupt_state++;
+		if (avr->interrupt_state == 0)
+			avr->interrupt_state = avr_has_pending_interrupts(avr);
 		return;
+	}
 
 	avr_int_table_p table = &avr->interrupts;
 
 	// how many are pending...
-	int cnt = table->pending_w > table->pending_r ?
-			table->pending_w - table->pending_r :
-			(table->pending_w + INT_FIFO_SIZE) - table->pending_r;
+	int cnt = INT_FIFO_MOD(
+				(table->pending_w + INT_FIFO_SIZE) - table->pending_r);
 	// locate the highest priority one
 	int min = 0xff;
 	int mini = 0;