Microsoft DirectX 8.0 (Visual Basic)

slt

Sets the destination to 1.0 if the first source operand is less than the second source operand; otherwise, the destination is set to 0.0.

slt   vDest, vSrc0, vSrc1

Registers

vDest
Destination register, holding the result of the operation.
vSrc0
Source register, specifying the input argument.
vSrc1
Source register, specifying the input argument.

Operation

The following code fragment shows the operations performed by the slt instruction to write a result to the destination.

    SetDestReg();
    SetSrcReg(0);
    SetSrcReg(1);

    m_TmpReg.x = (m_Source[0].x < m_Source[1].x) ? 1.0f : 0.0f;
    m_TmpReg.y = (m_Source[0].y < m_Source[1].y) ? 1.0f : 0.0f;
    m_TmpReg.z = (m_Source[0].z < m_Source[1].z) ? 1.0f : 0.0f;
    m_TmpReg.w = (m_Source[0].w < m_Source[1].w) ? 1.0f : 0.0f;

    WriteResult();

Remarks

The following example illustrates how the slt instruction might be used.

slt   r1, r2, v1