diff lab4/test/array.p @ 0:bfdcc3820b32

Basis
author Mike Spivey <mike@cs.ox.ac.uk>
date Thu, 05 Oct 2017 08:04:15 +0100
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lab4/test/array.p	Thu Oct 05 08:04:15 2017 +0100
@@ -0,0 +1,158 @@
+(* Local and global arrays *)
+
+var i: integer;
+
+var a: array 10 of integer;
+
+proc foo();
+  var j: integer;
+  var b : array 10 of integer;
+begin
+  print_string("foo"); newline();
+  j := 2; b[0] := 1; b[1] := 1;
+  while 10 > j do
+    b[j] := b[j-2] + b[j-1];
+    print_char(' '); print_num(b[j]);
+    j := 1+j
+  end;
+  newline();
+end;
+
+begin
+  print_string("baz"); newline();
+  i := 2; a[0] := 1; a[1] := 1;
+  while i < 10 do
+    a[i] := a[i-2] + a[i-1];
+    print_char(' '); print_num(a[i]);
+    i := i+1
+  end;
+  newline();
+  foo()
+end.
+
+(*<<
+baz
+ 2 3 5 8 13 21 34 55
+foo
+ 2 3 5 8 13 21 34 55
+>>*)
+
+(*[[
+@ picoPascal compiler output
+	.include "fixup.s"
+	.global pmain
+
+@ proc foo();
+	.text
+_foo:
+	mov ip, sp
+	stmfd sp!, {r4-r10, fp, ip, lr}
+	mov fp, sp
+	sub sp, sp, #40
+@   print_string("foo"); newline();
+	mov r1, #3
+	set r0, g1
+	bl print_string
+	bl newline
+@   j := 2; b[0] := 1; b[1] := 1;
+	mov r4, #2
+	mov r0, #1
+	str r0, [fp, #-40]
+	mov r0, #1
+	str r0, [fp, #-36]
+.L4:
+@   while 10 > j do
+	cmp r4, #10
+	bge .L6
+@     b[j] := b[j-2] + b[j-1];
+	add r0, fp, #-40
+	lsl r1, r4, #2
+	add r5, r0, r1
+	ldr r0, [r5, #-8]
+	ldr r1, [r5, #-4]
+	add r0, r0, r1
+	str r0, [r5]
+@     print_char(' '); print_num(b[j]);
+	mov r0, #32
+	bl print_char
+	add r0, fp, #-40
+	lsl r1, r4, #2
+	add r0, r0, r1
+	ldr r0, [r0]
+	bl print_num
+@     j := 1+j
+	add r4, r4, #1
+	b .L4
+.L6:
+@   newline();
+	bl newline
+	ldmfd fp, {r4-r10, fp, sp, pc}
+	.ltorg
+
+pmain:
+	mov ip, sp
+	stmfd sp!, {r4-r10, fp, ip, lr}
+	mov fp, sp
+@   print_string("baz"); newline();
+	mov r1, #3
+	set r0, g2
+	bl print_string
+	bl newline
+@   i := 2; a[0] := 1; a[1] := 1;
+	mov r0, #2
+	set r1, _i
+	str r0, [r1]
+	set r4, _a
+	mov r0, #1
+	str r0, [r4]
+	mov r0, #1
+	str r0, [r4, #4]
+.L8:
+@   while i < 10 do
+	set r0, _i
+	ldr r4, [r0]
+	cmp r4, #10
+	bge .L10
+@     a[i] := a[i-2] + a[i-1];
+	set r0, _a
+	lsl r1, r4, #2
+	add r4, r0, r1
+	ldr r0, [r4, #-8]
+	ldr r1, [r4, #-4]
+	add r0, r0, r1
+	str r0, [r4]
+@     print_char(' '); print_num(a[i]);
+	mov r0, #32
+	bl print_char
+	set r0, _a
+	set r1, _i
+	ldr r1, [r1]
+	lsl r1, r1, #2
+	add r0, r0, r1
+	ldr r0, [r0]
+	bl print_num
+@     i := i+1
+	set r4, _i
+	ldr r0, [r4]
+	add r0, r0, #1
+	str r0, [r4]
+	b .L8
+.L10:
+@   newline();
+	bl newline
+@   foo()
+	bl _foo
+	ldmfd fp, {r4-r10, fp, sp, pc}
+	.ltorg
+
+	.comm _i, 4, 4
+	.comm _a, 40, 4
+	.data
+g1:
+	.byte 102, 111, 111
+	.byte 0
+g2:
+	.byte 98, 97, 122
+	.byte 0
+@ End
+]]*)