Technical: Hardware: G4
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Vector Permute

vec_perm(arg1, arg2, arg3)

Each byte of the result is selected by using the least significant 5 bits of the corresponding byte of arg3 as an index into the concatenated bytes of arg1 and arg2.
See Example 3 of Highlights for a diagram of this operation.

Result

arg1 and arg2
arg3
Maps To

vector unsigned char

vector unsigned char
vector unsigned char
vperm

vector signed char

vector signed char
vector unsigned char
vperm

vector bool char

vector bool char
vector unsigned char
vperm

vector unsigned short

vector unsigned short
vector unsigned char
vperm

vector signed short

vector signed short
vector unsigned char
vperm

vector bool short

vector bool short
vector unsigned char
vperm

vector pixel

vector pixel
vector unsigned char
vperm

vector unsigned long

vector unsigned long
vector unsigned char
vperm

vector signed long

vector signed long
vector unsigned char
vperm

vector bool long

vector bool long
vector unsigned char
vperm

vector float

vector float
vector unsigned char
vperm