vcmpgtfp

Vector Compare Greater Than Floating-Point

vcmpgtfp VRT,VRA,VRB
vcmpgtfp. VRT,VRA,VRB

Compares the contents of two vector registers and sets the target vector register based on whether each element is greater than the corresponding element in the other vector.

Details

For vcmpgtfp, the contents of VSR[VRA+32] are compared to the contents of VSR[VRB+32]. The result is stored in VSR[VRT+32], with each word set to all 1s if the corresponding element in VSR[VRA+32] is greater than that in VSR[VRB+32], and all 0s otherwise.

Pseudocode Operation

if MSR.VEC=0 then
    Vector_Unavailable()
all_true ←1
all_false ←1
do i = 0 to 3
    src1 ←VSR[VRA+32].word[i]
    src2 ←VSR[VRB+32].word[i]
    if bool_COMPARE_GT_BFP32(src1,src2)=1 then
        VSR[VRT+32].word[i] ←0xFFFF_FFFF
        all_false ←0
    else
        all_true ←0
        VSR[VRT+32].word[i] ←0x0000_0000
end
if Rc=1 then
    CR.field[6] ←all_true || 0b0 || all_false || 0b0

Programming Note

When Rc=1, CR1 is set from the FPSCR[FX, FEX, VX, OX] bits immediately after the operation completes.

Example

vcmpgtfp v1, v2, v3

Encoding

Binary Layout
4
0
VRT
6
VRA
11
VRB
16
Rc
21
 
Format VC-form
Opcode 0x100002C6
Extension VMX (AltiVec)
Registers Altered CR6

Operands

  • vD
    Target
  • vA
    Src A
  • vB
    Src B
  • VRT
    Target Vector Register
  • VRA
    Source Vector Register
  • VRB
    Source Vector Register