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changeset 104:a0fdaa134964

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Use unsigned comparisons for address decoding, exit when we hit an unhandled addressing mode for jmp
author Mike Pavone <pavone@retrodev.com>
date Thu, 27 Dec 2012 23:00:11 -0800
parents a71544cd01ea
children 1a0fd122ca8f
files m68k_to_x86.c runtime.S
diffstat 2 files changed, 21 insertions(+), 20 deletions(-) [+]
line wrap: on
line diff
--- a/m68k_to_x86.c	Thu Dec 27 22:48:54 2012 -0800
+++ b/m68k_to_x86.c	Thu Dec 27 23:00:11 2012 -0800
@@ -1376,6 +1376,7 @@
 		break;
 	default:
 		printf("address mode %d not yet supported (jmp)\n", inst->src.addr_mode);
+		exit(1);
 	}
 	return dst;
 }
--- a/runtime.S	Thu Dec 27 22:48:54 2012 -0800
+++ b/runtime.S	Thu Dec 27 23:00:11 2012 -0800
@@ -178,15 +178,15 @@
 	call inccycles
 	and $0xFFFFFF, %rdi
 	cmp $0x400000, %edi
-	jle cart_w
+	jbe cart_w
 	cmp $0xE00000, %edi
-	jge workram_w
+	jae workram_w
 	cmp $0xC00000, %edi
-	jge vdp_psg_w
+	jae vdp_psg_w
 	cmp $0xA10000, %edi
-	jl not_io_w
+	jb not_io_w
 	cmp $0xA12000, %edi
-	jge not_io_w
+	jae not_io_w
 	jmp do_io_write_w
 not_io_w:
 	ret
@@ -202,7 +202,7 @@
 	jnz crash
 	and $0x1F, %edi
 	cmp $4, %edi
-	jl try_fifo_write
+	jb try_fifo_write
 	jmp do_vdp_port_write
 try_fifo_write:
 	push %rdx
@@ -245,15 +245,15 @@
 	call inccycles
 	and $0xFFFFFF, %rdi
 	cmp $0x400000, %edi
-	jle cart_wb
+	jbe cart_wb
 	cmp $0xE00000, %edi
-	jge workram_wb
+	jae workram_wb
 	cmp $0xC00000, %edi
-	jge vdp_psg_wb
+	jae vdp_psg_wb
 	cmp $0xA10000, %edi
-	jl not_io_wb
+	jb not_io_wb
 	cmp $0xA12000, %edi
-	jge not_io_wb
+	jae not_io_wb
 	jmp do_io_write
 not_io_wb:
 	ret
@@ -318,15 +318,15 @@
 	call inccycles
 	and $0xFFFFFF, %rcx
 	cmp $0x400000, %ecx
-	jle cart
+	jbe cart
 	cmp $0xE00000, %ecx
-	jge workram
+	jae workram
 	cmp $0xC00000, %ecx
-	jge vdp_psg
+	jae vdp_psg
 	cmp $0xA10000, %ecx
-	jl not_io
+	jb not_io
 	cmp $0xA12000, %ecx
-	jge not_io
+	jae not_io
 	call do_io_read_w
 	ret
 not_io:
@@ -366,13 +366,13 @@
 	call inccycles
 	and $0xFFFFFF, %rcx
 	cmp $0x400000, %ecx
-	jle cart_b
+	jbe cart_b
 	cmp $0xE00000, %ecx
-	jge workram_b
+	jae workram_b
 	cmp $0xA10000, %ecx
-	jl not_io_b
+	jb not_io_b
 	cmp $0xA12000, %ecx
-	jge not_io_b
+	jae not_io_b
 	jmp do_io_read
 not_io_b:
 	xor %cl, %cl