# HG changeset patch
# User Mike Pavone <pavone@retrodev.com>
# Date 1368081079 25200
# Node ID 3970006fae909002a081eb6f038f31f659ff2f27
# Parent  a57fac5b3d6545fae611270e347ce366860dc908
Properly handle negative displacements in Z80 core

diff -r a57fac5b3d65 -r 3970006fae90 z80_to_x86.c
--- a/z80_to_x86.c	Wed May 08 23:29:21 2013 -0700
+++ b/z80_to_x86.c	Wed May 08 23:31:19 2013 -0700
@@ -189,7 +189,7 @@
 	case Z80_IY_DISPLACE:
 		reg = opts->regs[(inst->addr_mode & 0x1F) == Z80_IX_DISPLACE ? Z80_IX : Z80_IY];
 		dst = mov_rr(dst, reg, areg, SZ_W);
-		dst = add_ir(dst, inst->ea_reg, areg, SZ_W);
+		dst = add_ir(dst, inst->ea_reg & 0x80 ? inst->ea_reg - 256 : inst->ea_reg, areg, SZ_W);
 		size = z80_size(inst);
 		if (read) {
 			if (modify) {