scc

commit e2f3d48cb2ad5ea6623874e9cee3975ebe9058c3
parent 60822915915dc8c55f83238f6b434e2ef56015ac
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Thu, 17 May 2018 14:22:48 +0000

[as/i286] Add Makefile support to build as-286

This is only a skeleton, but after this commit make all generates
a i286 binary.

Diffstat:
M
as/Makefile
 | 
6
++----
A
as/target/i286.mk
 | 
8
++++++++
R
as/target/x86/8086-test.s -> as/target/x86/i286-test.s
 | 
0

A
as/target/x86/i286.c
 | 
53
+++++++++++++++++++++++++++++++++++++++++++++++++++++

4 files changed, 63 insertions(+), 4 deletions(-)
diff --git a/as/Makefile b/as/Makefile
@@ -7,10 +7,7 @@ include $(LIBDIR)/libdep.mk
 OBJ = main.o symbol.o ins.o parser.o expr.o myro.o
 MOREFLAGS = -I$(PROJECTDIR)/inc/$(STD) $(AS_CFLAGS)
 
-all: as-amd64 as-i386 as-z80
-
-as: $(OBJ)
-	$(CC) $(SCC_LDFLAGS) $(OBJ) -lscc -o $@
+all: as-amd64 as-i386 as-i286 as-z80
 
 dep:
 	$(PROJECTDIR)/mkdep.sh
@@ -24,6 +21,7 @@ clean:
 
 include target/amd64.mk
 include target/i386.mk
+include target/i286.mk
 include target/z80.mk
 
 #deps
diff --git a/as/target/i286.mk b/as/target/i286.mk
@@ -0,0 +1,8 @@
+
+I286_OBJ = $(OBJ) target/x86/i286tbl.o target/x86/i286.o target/x86/ins.o
+
+target/x86/i286tbl.c: gentbl.awk target/x86/x86.dat target/x86/rules.dat
+	./gentbl.sh -f x86 -c i286
+
+as-i286: $(I286_OBJ) $(LIBDIR)/libscc.a
+	$(CC) $(SCC_LDFLAGS) $(I286_OBJ) -lscc -o $@
diff --git a/as/target/x86/8086-test.s b/as/target/x86/i286-test.s
diff --git a/as/target/x86/i286.c b/as/target/x86/i286.c
@@ -0,0 +1,53 @@
+static char sccsid[] = "@(#) ./as/target/x86/i286.c";
+
+#include "../../../inc/scc.h"
+#include "../../as.h"
+#include "../x86/proc.h"
+
+TUINT maxaddr = 0xFFFF;
+int endian = LITTLE_ENDIAN;
+int left2right = 0;
+
+void
+iarch(void)
+{
+	static struct {
+		char *name;
+		char type;
+	} regs[] = {
+		"CS", AREG_CS,
+		"DS", AREG_DS,
+		"SS", AREG_SS,
+		"ES", AREG_ES,
+
+		"AX", AREG_AX,
+		"AL", AREG_AL,
+		"AH", AREG_AH,
+
+		"BC", AREG_BX,
+		"BL", AREG_BL,
+		"BH", AREG_BH,
+
+		"CX", AREG_CX,
+		"CL", AREG_CL,
+		"CH", AREG_CH,
+
+		"DX", AREG_DX,
+		"DL", AREG_DL,
+		"DH", AREG_DH,
+
+		"SI", AREG_SI,
+		"DI", AREG_DI,
+
+		"SP", AREG_SP,
+		"BP", AREG_BP,
+
+		NULL
+	}, *bp;
+
+	for (bp = regs; bp->name; ++bp) {
+		Symbol *sym = lookup(bp->name);
+		sym->flags = FREG;
+		sym->value = bp->type;
+	}
+}