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[Bug gas/27823] New: [z80-unknown-elf] invalid instruction `ld h, (<nn>)


From: petemoore at gmx dot net
Subject: [Bug gas/27823] New: [z80-unknown-elf] invalid instruction `ld h, (<nn>)` should not assemble
Date: Tue, 04 May 2021 14:09:45 +0000

https://sourceware.org/bugzilla/show_bug.cgi?id=27823

            Bug ID: 27823
           Summary: [z80-unknown-elf] invalid instruction `ld h, (<nn>)`
                    should not assemble
           Product: binutils
           Version: 2.35
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: gas
          Assignee: unassigned at sourceware dot org
          Reporter: petemoore at gmx dot net
                CC: sergey.belyashov at gmail dot com
  Target Milestone: ---
            Target: z80-unknown-elf

```
$ # GAS version
$ z80-unknown-elf-as --version
GNU assembler (GNU Binutils) 2.35.50.20201201
Copyright (C) 2020 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or later.
This program has absolutely no warranty.
This assembler was configured for a target of `z80-unknown-elf'.

$ # Sample assembly file
$ cat test.asm

ld a, (0x1234)
ld h, (0x2345)
ld a, h

$ # Assembly should fail but instead assembled code omits invalid instruction
$ z80-unknown-elf-as -o test.o test.asm && z80-unknown-elf-objdump -d test.o

test.o:     file format elf32-z80


Disassembly of section .text:

00000000 <.text>:
   0:   3a 34 12        ld a,(0x1234)
   3:   7c              ld a,h
$ 
```

Other invalid instructions correctly cause assembly to fail, but for some
reason, `ld h, (<16 bit address>)` doesn't.

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