FISTTP—Store Integer with Truncation

[aw27]

Using this "new" x87 instruction gives the error:
"Error A2030: Instruction or register not accepted in current CPU mode".

I tried all CPU modes.

It works fine with Masm.

[jj2007]

Which UASM version doesn't work?

Code Select Expand

include \masm32\include\masm32rt.inc
.686
.xmm

.code
start:
  fldpi
  push eax
  FISTTP dword ptr [esp]
  pop ecx

  MsgBox 0, cat$(str$(ecx), " is the result"), "fisttp:", MB_OK
  exit

end start

[aw27]

This way does not:
fisttp dword ptr storedDword

[jj2007]

For me, fisttp dword ptr storedDword works like a charm. Can you post a complete example?

[aw27]

You are right.
It works with
.686
.xmm

It does not work with
.xmm
.686

Thanks.

But it works with Masm. So probably I reported the wrong issue.  :lol:

[jj2007]

It's not a bug but a little incompatibility. I guess the team will fix it in a day or two. Microxxxx needs a decade or two...

[aw27]

It's not a bug but a little incompatibility. I guess the team will fix it in a day or two. Microxxxx needs a decade or two...

For me there is no need to fix the incompatibility, I have repeated 10 times "First .686, second .xmm". I will never forget it :P

[hutch--]

 

Now you understand why MASM does not have bugs, only features that you need to understand. Thank God for ML64.

.code
  ; everything inbetween
end

:P