From 0cca0c96cf27b0062986611ee04d4bb88a609405 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20Strohh=C3=A4cker?=
 <c2woody@users.sourceforge.net>
Date: Mon, 8 Jan 2007 21:29:27 +0000
Subject: [PATCH] enable instant irq checking after STI for the dynamic core

Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2735
---
 src/cpu/core_dyn_x86/decoder.h | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/cpu/core_dyn_x86/decoder.h b/src/cpu/core_dyn_x86/decoder.h
index 35328bd9..10973317 100644
--- a/src/cpu/core_dyn_x86/decoder.h
+++ b/src/cpu/core_dyn_x86/decoder.h
@@ -188,6 +188,22 @@ static void dyn_check_bool_exception_al(void) {
 	used_save_info++;
 }
 
+#include "pic.h"
+
+static void dyn_check_irqrequest(void) {
+	gen_load_host(&PIC_IRQCheck,DREG(TMPB),4);
+	gen_dop_word(DOP_OR,true,DREG(TMPB),DREG(TMPB));
+	save_info[used_save_info].branch_pos=gen_create_branch_long(BR_NZ);
+	gen_releasereg(DREG(TMPB));
+	dyn_savestate(&save_info[used_save_info].state);
+	if (!decode.cycles) decode.cycles++;
+	save_info[used_save_info].cycles=decode.cycles;
+	save_info[used_save_info].eip_change=decode.code-decode.code_start;
+	if (!cpu.code.big) save_info[used_save_info].eip_change&=0xffff;
+	save_info[used_save_info].type=normal;
+	used_save_info++;
+}
+
 static void dyn_fill_blocks(void) {
 	for (Bitu sct=0; sct<used_save_info; sct++) {
 		gen_fill_branch_long(save_info[sct].branch_pos);
@@ -1791,6 +1807,7 @@ restart_prefix:
 			gen_call_function((void *)&CPU_STI,"%Rd",DREG(TMPB));
 			if (cpu.pmode) dyn_check_bool_exception(DREG(TMPB));
 			gen_releasereg(DREG(TMPB));
+			dyn_check_irqrequest();
 			if (max_opcodes<=0) max_opcodes=1;		//Allow 1 extra opcode
 			break;
 		case 0xfc:		//CLD