A strange inline Z80-assembler bug

The Small Device C Compiler (SDCC), targeting 8-bit architectures

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#2426 A strange inline Z80-assembler bug

Status: closed-rejected

Owner: Philipp Klaus Krause

Labels: None

Category: Z80

Priority: 5

Updated: 2015-10-09

Created: 2015-10-09

Creator: Oleg N. Cher

Private: No

SDCC 3.4.2 #9149 (Dec 29 2014) (MINGW32)

sdcc -mz80 test.c
test.asm:51: Error: machine specific addressing or addressing mode error
removing test.rel

When I remove the last block:

LDI          ; #4
LDI
DEC  E
DEC  E
INC  D

the bug is lost. Philipp, please, take a look.

1 Attachments

test.c

Discussion

Philipp Klaus Krause - 2015-10-09

I don't see a bug, just a jr with an out-of-range jump target, resulting in an error message from the assembler. An error message, that is technically correct, but not very helpful. jr has jump range -126 to +129, unlike jp, which has a bigger range. When you remove the last bock, the target is in range for jr.

Philipp

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Philipp Klaus Krause - 2015-10-09

status: open --> closed-rejected

assigned_to: Philipp Klaus Krause
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Oleg N. Cher - 2015-10-09

You're absolutely right, Philipp, thank you. Sorry for bother.

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