Package org.deepjava.unsafe.ppc

Class US

  • public class US
extends US
    This class allows for accessing absolute memory locations and machine registers on a PowerPC processor. Warning: The inherent safety of Java is avoided. Use these methods with special care and only in low-level drivers! The methods of this class will be translated by inserting machine code instructions directly in the code without a method call.

    • Constructor Summary

      Constructors 
      Constructor Description
      US()  

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static void ENABLE_FLOATS()
      Saves FPSCR and all temporary FPRs (Floating Point Registers) and sets the FP flag in MSR (usingGPR0).
      static double GETFPR​(int reg)
      Read content of floating point register
      static int GETGPR​(int reg)
      Read content of general purpose register
      static int GETSPR​(int reg)
      Read content of special purpose register
      static void HALT​(int haltNr)
      Halt exception: program termination, 20 <= haltNr < 256
      static void PUTFPR​(int reg, double value)
      Write to floating point register
      static void PUTGPR​(int reg, int value)
      Write to general purpose register
      static void PUTSPR​(int reg, int value)
      Write to special purpose register

    • Constructor Detail

      • US

        public US()

    • Method Detail

      • GETGPR

        public static int GETGPR​(int reg)
        Read content of general purpose register
        Parameters:
        reg - Register number.
        Returns:
        Register content.

      • GETFPR

        public static double GETFPR​(int reg)
        Read content of floating point register
        Parameters:
        reg - Register number.
        Returns:
        Register content.

      • GETSPR

        public static int GETSPR​(int reg)
        Read content of special purpose register
        Parameters:
        reg - Register number.
        Returns:
        Register content.

      • PUTGPR

        public static void PUTGPR​(int reg,
                          int value)
        Write to general purpose register
        Parameters:
        reg - Register number.
        value - Register content.

      • PUTFPR

        public static void PUTFPR​(int reg,
                          double value)
        Write to floating point register
        Parameters:
        reg - Register number.
        value - Register content.

      • PUTSPR

        public static void PUTSPR​(int reg,
                          int value)
        Write to special purpose register
        Parameters:
        reg - Register number.
        value - Register content.

      • HALT

        public static void HALT​(int haltNr)
        Halt exception: program termination, 20 <= haltNr < 256
        Parameters:
        haltNr - User definable halt number.

      • ENABLE_FLOATS

        public static void ENABLE_FLOATS()
        Saves FPSCR and all temporary FPRs (Floating Point Registers) and sets the FP flag in MSR (usingGPR0). This method must be called before any other statement in a method.