xvtsqrtsp

Pseudocode Operation

if MSR.VSX=0 then
    VSX_Unavailable()

fe_flag ←0b0
fg_flag ←0b0

do i = 0 to 3
    src    ←VSR[32×XB+B].word[i]
e_b    ←src2.bit[1:8] - 127
fe_flag ←fe_flag |
           IsNaN(src) | IsInf(src) |
           IsZero(src) | IsNeg(src) |
           (e_a <= -103)
fg_flag ←fg_flag | IsInf(src) |
           IsZero(src) | IsDen(src)
end

fl_flag = xvrsqrtesp_error() <= 2-14
CR.field[BF]  = 0b1 || fg_flag || fe_flag || 0b0

Programming Note

The xvtsqrtsp instruction is used to test each element of a vector for NaN, infinity, zero, negative values, and underflow conditions. It sets the condition register based on these tests. Ensure that VSX is enabled in the MSR before using this instruction; otherwise, it will raise an exception. The instruction does not require specific alignment but must be executed at a privilege level where VSX is available.

Example