xsxexpdp

VSX Scalar Extract Exponent Double-Precision

xsxexpdp XT, XB

Extracts the exponent from a double-precision floating-point value in VSR and places it into GPR.

Encoding

Binary Layout

60

0:5

XT

6:10

0

11:15

XB

16:20

27

21:31

 

Format XX2-form

Opcode 0xF000056C

Extension VSX

Operands

• XT
  Target
• XB
  Source
• RT
  Target General Purpose Register

Example

xsxexpdp vs1, vs3

Registers Altered

MSR

Related

More in VSX

Reference

View in PowerISA v3.1C Specification ↗ OPF Power ISA v3.1C

Description

The instruction extracts the exponent field of a double-precision floating-point value located in the specified VSX register and stores it in a general-purpose register.

Operation

if MSR.VSX=0 then VSX_Unavailable()
src ←VSR[32×BX+B].dword[0]
GPR[RT] ←EXTZ64(src.bit[1:11])

Programming Note

This instruction can be used to operate on a single-precision source operand.