Merge branch 'develop-0.18' of https://github.com/catseye/SixtyPical into goto-at-end-of-block

tests/SixtyPical Analysis.md

@@ -1118,6 +1118,52 @@ Some rudimentary tests for `cmp`.
     | }
     ? UnmeaningfulReadError: a
 
+`cmp` can work on words. In this case, it trashes `a`.
+
+    | word za
+    | word zb
+    | 
+    | define main routine
+    |   inputs za, zb
+    |   trashes a, z, c, n
+    | {
+    |     cmp za, zb
+    | }
+    = ok
+
+    | word za
+    | word zb
+    | 
+    | define main routine
+    |   inputs za, zb
+    |   trashes a, z, n
+    | {
+    |     cmp za, zb
+    | }
+    ? ForbiddenWriteError: c
+
+    | word za
+    | word zb
+    | 
+    | define main routine
+    |   inputs za, zb
+    |   trashes z, c, n
+    | {
+    |     cmp za, zb
+    | }
+    ? ForbiddenWriteError: a
+
+    | word za
+    | word zb
+    | 
+    | define main routine
+    |   inputs za
+    |   trashes z, c, n
+    | {
+    |     cmp za, zb
+    | }
+    ? UnmeaningfulReadError: zb
+
 ### and ###
 
 Some rudimentary tests for `and`.

tests/SixtyPical Compilation.md

@@ -385,6 +385,26 @@ Some instructions on tables. (3/3)
     = $081B   DEC $081F,X
     = $081E   RTS
 
+Compiling 16-bit `cmp`.
+
+    | word za @ 60001
+    | word zb : 3003
+    | 
+    | define main routine
+    |   inputs za, zb
+    |   trashes a, z, c, n
+    | {
+    |     cmp za, zb
+    | }
+    = $080D   LDA $EA61
+    = $0810   CMP $081C
+    = $0813   BNE $081B
+    = $0815   LDA $EA62
+    = $0818   CMP $081D
+    = $081B   RTS
+    = $081C   .byte $BB
+    = $081D   .byte $0B
+
 Compiling `if`.
 
     | define main routine