From 61915939b5953db7a04bb9ee254ff356566ebcb4 Mon Sep 17 00:00:00 2001
From: Jeffrey Pfau <jeffrey@endrift.com>
Date: Thu, 23 Oct 2014 01:45:32 -0700
Subject: [PATCH] Log division by zero

---
 src/gba/gba-bios.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/gba/gba-bios.c b/src/gba/gba-bios.c
index d5985a7f1..8587f7545 100644
--- a/src/gba/gba-bios.c
+++ b/src/gba/gba-bios.c
@@ -99,13 +99,15 @@ static void _MidiKey2Freq(struct GBA* gba) {
 	cpu->gprs[0] = key / powf(2, (180.f - cpu->gprs[1] - cpu->gprs[2] / 256.f) / 12.f);
 }
 
-static void _Div(struct ARMCore* cpu, int32_t num, int32_t denom) {
+static void _Div(struct GBA* gba, int32_t num, int32_t denom) {
+	struct ARMCore* cpu = gba->cpu;
 	if (denom != 0) {
 		div_t result = div(num, denom);
 		cpu->gprs[0] = result.quot;
 		cpu->gprs[1] = result.rem;
 		cpu->gprs[3] = abs(result.quot);
 	} else {
+		GBALog(gba, GBA_LOG_GAME_ERROR, "Attempting to divide %i by zero!", num);
 		// If abs(num) > 1, this should hang, but that would be painful to
 		// emulate in HLE, and no game will get into a state where it hangs...
 		cpu->gprs[0] = (num < 0) ? -1 : 1;
@@ -138,10 +140,10 @@ void GBASwi16(struct ARMCore* cpu, int immediate) {
 		ARMRaiseSWI(cpu);
 		break;
 	case 0x6:
-		_Div(cpu, cpu->gprs[0], cpu->gprs[1]);
+		_Div(gba, cpu->gprs[0], cpu->gprs[1]);
 		break;
 	case 0x7:
-		_Div(cpu, cpu->gprs[1], cpu->gprs[0]);
+		_Div(gba, cpu->gprs[1], cpu->gprs[0]);
 		break;
 	case 0x8:
 		cpu->gprs[0] = sqrt(cpu->gprs[0]);