Rework assembler for simplified instruction set

- Remove commas and brackets from syntax
- Rename opcodes for unambiguous instruction encodings
- Redesign parse instruction encoding
- Implement opcode parser
- Add bit-width restriction to octal parser

1 files changed, 16 insertions, 0 deletions

diff --git a/string.s b/string.s
new file mode 100644
index 0000000..0ed7ca3
--- /dev/null
+++ b/string.s
@@ -0,0 +1,16 @@
+// R0 : string1 address
+// R1 : string2 address
+// Result in R0
+string_compare:
+  MOVS R4, 0
+loop:
+  LDRB R2, [R0, R4]
+  LDRB R3, [R1, R4]
+  CMP R2, R3
+  BNE done
+  CMP R2, 0
+  BEQ done
+  ADDS R4, 1
+  B loop
+done:
+  BX LR