compiler

commit 755aeabb4f2811a985df6f1960dca82dae5d8be1
parent 931d6cc0c85f033f836057cd2db5f45f705f9e8f
Author: Brian Swetland <swetland@frotz.net>
Date:   Tue, 10 Mar 2020 12:04:39 -0700

compiler: stop generating entry/exit shims

- emulator now handles environment setup
- just setup a branch from 0 to func "start"

Diffstat:
M
src/compiler.c
 | 
9
++-------

1 file changed, 2 insertions(+), 7 deletions(-)
diff --git a/src/compiler.c b/src/compiler.c
@@ -1739,8 +1739,6 @@ void gen_start() {
 }
 
 void gen_end() {
-	ctx.code[0] |= (ctx.pc - 4) >> 2; // patch branch at 0
-
 	String str = mkstring("start", 5);
 	Object obj = find(str);
 	while (obj != nil) {
@@ -1750,11 +1748,8 @@ void gen_end() {
 		if (obj->first != nil) {
 			error("'start' must have no parameters\n");
 		}
-		emit_mov(14, 0x100000);                      // MOV SP, RAMTOP
-		emit_bi(AL|L, -((ctx.pc + 4 - obj->value) >> 2));  // BL start
-		emit_mov(1, 0xFFFF0000);                     // MOV R1, IOBASE
-		emit_mem(STW, 0, 1, 0x100);                  // SW R0, [R1, 0x100]
-		emit_bi(AL, -1);                             // B .
+		// patch branch at addr 0
+		ctx.code[0] |= (obj->value - 4) >> 2;
 		return;
 	}
 	error("no 'start' function\n");