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gforth AMD64 assembler problem
From: |
anthony |
Subject: |
gforth AMD64 assembler problem |
Date: |
Sat, 15 Aug 2020 10:56:35 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 |
Hello,
most likely there is a gap in my knowledge or my understanding about
gforth, but maybe there is a bug.
I want to write assembler routines for the AMD64 platform. My computer
is Intel 64 bit and the used operating system is openSUSE 15.2 64 bit.
I installed gforth_0.7.3 and read the manuals. Advised was to use
ABI-CODE and END-CODE for assembly programs. These words were not
available in the dictionary.
Then I installed snapshot 0.7.9_2020013. Now ABI-CODE was available, but
I had still assembler problems and wanted the assembler to test against
arch/amd64/testasm.fs.
Unfortunately testasm.fs for AMD64 was not available in this package.
Then I installed the git version, fortunately this included
testasm.fs.But it also gave me assembler errors:
$ cd arch/amd64/
$ ../../gforth testasm.fs
in file included from *the terminal*:0:-21242127:
in file included from *the terminal*:-1:1:
testasm.fs:7:1: error: Control structure mismatch
>>>end-code<<<
Backtrace:
kernel/cond.fs:114:26 0 $7F75E6785200 throw
code.fs:96:14 1 $7F75E67B9248 ?struc
I edited and reduced testasm.fs until it contained only:
abi-code ssedup
\ SP passed in di, returned in ax, address of FP passed in si
-16 di d) ax lea \ compute new sp in result reg
di ) xmm0 movupd
xmm0 ax ) movups
ret
end-code
including and loading testasm.fs again gave the same error.
Then I commented out line 3:
abi-code ssedup
\ SP passed in di, returned in ax, address of FP passed in si
\ -16 di d) ax lea \ compute new sp in result reg
di ) xmm0 movupd
xmm0 ax ) movups
ret
end-code
Now the assembler accepted the file with no error.
My conclusion is an incompatibility with
-16 di d) ax lea
as this gives the error message : Control structure mismatch
This line has the same signature as where I had my initial problems.
I hope you can reproduce it and have a suggestion how to solve it.
Thanks, Anthony Vogelaar
- gforth AMD64 assembler problem,
anthony <=