--- a/progs/while/compile.sc Wed Nov 18 12:18:33 2020 +0000
+++ b/progs/while/compile.sc Tue Nov 24 21:22:31 2020 +0000
@@ -47,40 +47,6 @@
return
.end method
-.method public static read()I
- .limit locals 10
- .limit stack 10
-
- ldc 0
- istore 1 ; this will hold our final integer
-Label1:
- getstatic java/lang/System/in Ljava/io/InputStream;
- invokevirtual java/io/InputStream/read()I
- istore 2
- iload 2
- ldc 10 ; the newline delimiter
- isub
- ifeq Label2
- iload 2
- ldc 32 ; the space delimiter
- isub
- ifeq Label2
-
- iload 2
- ldc 48 ; we have our digit in ASCII, have to subtract it from 48
- isub
- ldc 10
- iload 1
- imul
- iadd
- istore 1
- goto Label1
-Label2:
- ;when we come here we have our integer computed in local variable 1
- iload 1
- ireturn
-.end method
-
.method public static main([Ljava/lang/String;)V
.limit locals 200
.limit stack 200
@@ -118,7 +84,7 @@
}
// this allows us to write things like
-// i"add" and l"Label"
+// i"iadd" and l"Label"
// environments
@@ -139,6 +105,7 @@
compile_aexp(a1, env) ++ compile_aexp(a2, env) ++ compile_op(op)
}
+
// boolean expression compilation
// - the jump-label is for where to jump if the condition is not true
def compile_bexp(b: BExp, env : Env, jmp: String) : String = b match {
@@ -256,3 +223,46 @@
@main
def test2() =
run(fib_test, "fib")
+
+
+
+
+
+
+/* Jasmin code for reading an integer
+
+.method public static read()I
+ .limit locals 10
+ .limit stack 10
+
+ ldc 0
+ istore 1 ; this will hold our final integer
+Label1:
+ getstatic java/lang/System/in Ljava/io/InputStream;
+ invokevirtual java/io/InputStream/read()I
+ istore 2
+ iload 2
+ ldc 10 ; the newline delimiter
+ isub
+ ifeq Label2
+ iload 2
+ ldc 32 ; the space delimiter
+ isub
+ ifeq Label2
+
+ iload 2
+ ldc 48 ; we have our digit in ASCII, have to subtract it from 48
+ isub
+ ldc 10
+ iload 1
+ imul
+ iadd
+ istore 1
+ goto Label1
+Label2:
+ ;when we come here we have our integer computed in local variable 1
+ iload 1
+ ireturn
+.end method
+
+*/
\ No newline at end of file