diff lab4/test/not.p @ 0:bfdcc3820b32

Basis
author Mike Spivey <mike@cs.ox.ac.uk>
date Thu, 05 Oct 2017 08:04:15 +0100
parents
children
line wrap: on
line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lab4/test/not.p	Thu Oct 05 08:04:15 2017 +0100
@@ -0,0 +1,46 @@
+(* Boolean negation *)
+
+var b: boolean;
+
+begin
+  b := not b;
+  if b then print_string("ok"); newline() end
+end.
+
+(*<<
+ok
+>>*)
+
+(*[[
+@ picoPascal compiler output
+	.include "fixup.s"
+	.global pmain
+
+	.text
+pmain:
+	mov ip, sp
+	stmfd sp!, {r4-r10, fp, ip, lr}
+	mov fp, sp
+@   b := not b;
+	set r4, _b
+	ldrb r0, [r4]
+	eor r5, r0, #1
+	strb r5, [r4]
+@   if b then print_string("ok"); newline() end
+	cmp r5, #0
+	beq .L2
+	mov r1, #2
+	set r0, g1
+	bl print_string
+	bl newline
+.L2:
+	ldmfd fp, {r4-r10, fp, sp, pc}
+	.ltorg
+
+	.comm _b, 1, 4
+	.data
+g1:
+	.byte 111, 107
+	.byte 0
+@ End
+]]*)