Visible to Intel only — GUID: GUID-95DCBBB3-99E1-4DE2-9ADE-80715F7C1DE9
Visible to Intel only — GUID: GUID-95DCBBB3-99E1-4DE2-9ADE-80715F7C1DE9
Multiplication Operators
The multiplication operators can only accept and return data types from the I[s|u]16vec4 or I[s|u]16vec8 classes, as shown in the following example.
Syntax Usage for Multiplication Operators
Explicitly convert B to Is16vec4.
Is16vec4 A,C;
Iu32vec2 B;
C = A * C;
C = A * (Is16vec4)B;
Return nearest common ancestor type, I16vec4
Is16vec4 A;
Iu16vec4 B;
I16vec4 C;
C = A + B;
The mul_high and mul_add functions take Is16vec4 data only.
Is16vec4 A,B,C,D;
C = mul_high(A,B);
D = mul_add(A,B);
Multiplication Operators with Corresponding Intrinsics
Symbols | Syntax Usage |
Intrinsic |
|
---|---|---|---|
* |
*= |
R = A * B |
_mm_mullo_pi16 |
mul_high |
N/A |
R = mul_high(A, B) |
_mm_mulhi_pi16 |
mul_add |
N/A |
R = mul_high(A, B) |
_mm_madd_pi16 |
The multiplication return operators always return the nearest common ancestor as listed in the table that follows. The two operands must be 16 bits in size, otherwise you must explicitly indicate typecasting.
Multiplication Operator Overloading
R |
Mul |
A |
B |
---|---|---|---|
I16vec4 R |
* |
I[s|u]16vec4 A |
I[s|u]16vec4 B |
I16vec8 R |
* |
I[s|u]16vec8 A |
I[s|u]16vec8 B |
Is16vec4 R |
mul_add |
Is16vec4 A |
Is16vec4 B |
Is16vec8 |
mul_add |
Is16vec8 A |
Is16vec8 B |
Is32vec2 R |
mul_high |
Is16vec4 A |
Is16vec4 B |
Is32vec4 R |
mul_high |
s16vec8 A |
Is16vec8 B |
The following table shows the return values and data type assignments for operands of the multiplication operators with assignment. All operands must be 16 bytes in size. If the operands are not the right size, you must use an explicit typecast.
Multiplication with Assignment
Return Value (R) |
Left Side (R) |
Mul |
Right Side (A) |
---|---|---|---|
I[x]16vec8 |
I[x]16vec8 |
*= |
I[s|u]16vec8 A; |
I[x]16vec4 |
I[x]16vec4 |
*= |
I[s|u]16vec4 A; |