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Index > Macroinstructions > Need to know the type of parameter in a macro.

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madmatt



Joined: 07 Oct 2003
Posts: 1045
Location: Michigan, USA
madmatt
I'm writing a macro for simple vector math and need to know the type of variable that is passed. In the example below, I need to know what kind of variable fscalar is, a direct float 5.0, or a variable [fscalar]:
Code:
;Vector3 operator*(Vector3 v, Scalar a)
macro MULTVECTORSCALAR vectora, fscalar
      if eqtype fscalar, 1.0
         fldd    fscalar
         fld     st0
         fld     st0
      else
         fld     [fscalar]
         fld     st0
         fld     st0
      end if

      fmul    [vectora + D3DVECTOR.x]
      fstp    [vectora + D3DVECTOR.x]
      fmul    [vectora + D3DVECTOR.y]
      fstp    [vectora + D3DVECTOR.y]
      fmul    [vectora + D3DVECTOR.z]
      fstp    [vectora + D3DVECTOR.z]
}    

_________________
Gimme a sledge hammer! I'LL FIX IT!
Post 27 May 2009, 18:23
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LocoDelAssembly
Your code has a bug


Joined: 06 May 2005
Posts: 4633
Location: Argentina
LocoDelAssembly
Code:
macro type [arg]
{
  if arg eqtype 1.0
    display "It's a float constant", 13, 10
  else if arg eqtype 0
    display "May be an address", 13, 10
  else if arg eqtype []
    display "It is an address", 13, 10
  else
    display "It is something else", 13, 10
  end if
}

type 1.0
type aLabel
type 5
type [eax+ebx]

aLabel:    
Question
Post 27 May 2009, 19:24
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madmatt



Joined: 07 Oct 2003
Posts: 1045
Location: Michigan, USA
madmatt
Yeh, thanks for the help, everything is working now.
Post 27 May 2009, 19:56
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Madis731



Joined: 25 Sep 2003
Posts: 2140
Location: Estonia
Madis731
Why not:
Code:
struct D3DVECTOR
  x dd ?
  y dd ?
  z dd ?
  dummy dd ?
ends
;Vector3 operator*(Vector3 v, Scalar a)
macro MULTVECTORSCALAR vectora, fscalar
{
      pshufd  xmm0,dqword[fscalar],00000000b
      mulps   xmm0,dqword[vectora + D3DVECTOR.x]
      movaps  dqword[vectora + D3DVECTOR.x],xmm0
}
MULTVECTORSCALAR blah1,blah2
    

or compatibility-issues?
Post 28 May 2009, 12:03
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madmatt



Joined: 07 Oct 2003
Posts: 1045
Location: Michigan, USA
madmatt
Thanks Madis731,
I do need to learn sse programming much better than I do now.
Post 01 Jun 2009, 10:02
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