Instructions - vs_1_1

This section contains reference information for the vertex shader version 1_1 instructions.

There are several types of vertex shader instructions, as shown in the table. Columns to the right mean the following:

Instruction slots - Number of instruction slots used by each instruction.
Setup - Non-arithmetic instructions. Every shader must have a version instruction and it must be the first instruction.
Arithmetic - These instructions provide the mathematical operations in a shader.
New - These instructions are new to this version.

Instruction Set

Name	Description	Instruction slots	Setup	Arithmetic	New
add - vs	Add two vectors	1		x	x
dcl_usage input (sm1, sm2, sm3 - vs asm)	Declare input vertex registers (see Registers - vs_1_1)	0	x		x
def - vs	Define constants	0	x		x
dp3 - vs	Three-component dot product	1		x	x
dp4 - vs	Four-component dot product	1		x	x
dst - vs	Calculate the distance vector	1		x	x
exp - vs	Full precision 2^x	10		x	x
expp - vs	Partial precision 2^x	1		x	x
frc - vs	Fractional component	3		x	x
lit - vs	Partial lighting calculation	1		x	x
log - vs	Full precision log₂(x)	10		x	x
logp - vs	Partial precision log₂(x)	1		x	x
m3x2 - vs	3x2 multiply	2		x	x
m3x3 - vs	3x3 multiply	3		x	x
m3x4 - vs	3x4 multiply	4		x	x
m4x3 - vs	4x3 multiply	3		x	x
m4x4 - vs	4x4 multiply	4		x	x
mad - vs	Multiply and add	1		x	x
max - vs	Maximum	1		x	x
min - vs	Minimum	1		x	x
mov - vs	Move	1		x	x
mul - vs	Multiply	1		x	x
nop - vs	No operation	1		x	x
rcp - vs	Reciprocal	1		x	x
rsq - vs	Reciprocal square root	1		x	x
sge - vs	Greater than or equal compare	1		x	x
slt - vs	Less than compare	1		x	x
sub - vs	Subtract	1		x	x
vs	Version	0	x		x