Print Page - mov byte ptr [rax] Bug

Title: mov byte ptr [rax] Bug
Post by: LiaoMi on May 04, 2019, 12:48:47 AM

Hello,

my friend found a bug in the latest version of the UASM, byte turns into a double word .. In version 2.47.1 there is no bug...

Code

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mainCRTStartup proc
    mov byte ptr [rax], 0e8h
   
	ret
	align	4
mainCRTStartup endp

Bin

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MOV     DWORD PTR DS:[RAX], E8
RET     
NOP

in another version it will be like this

Code

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mov BYTE PTR [rax],0x2a
Bin

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MOV BYTE PTR DS:[RAX], 2A

I think both entries should be correct?

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    mov byte ptr [rax], 0e8h
    mov BYTE PTR [rax],0x2a

Is it possible to publish a quick bugfix to compile a new version?

Thank you! ::)

Title: Re: mov byte ptr [rax] Bug
Post by: johnsa on May 07, 2019, 12:37:35 AM

Hi, good catch.

I will apply a fix and update 2.48.1

Surprised this one slipped through as there are about 20 different sets of regression tests for move alone..

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64 bit assembler => UASM Assembler Development => Topic started by: LiaoMi on May 04, 2019, 12:48:47 AM