sgn - vs
Computes the sign of the input.
Syntax
sgn dst, src0, src1, src2 |
---|
where
- dst is the destination register.
- src0 is a source register.
- src1 is a temporary register that holds intermediate results. Following execution, contents are undefined.
- src2 is a temporary register that holds intermediate results. Following execution, contents are undefined.
Remarks
Vertex shader versions | 1_1 | 2_0 | 2_x | 2_sw | 3_0 | 3_sw |
---|---|---|---|---|---|---|
sgn | x | x | x | x | x |
This instruction works as shown below.
for each component in src0
{
if (src0.component < 0)
dest.component = -1;
else
if (src0.component == 0)
dest.component = 0;
else
dest.component = 1;
}
src1 and src2 must be different Temporary Registers.
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