Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-8290137

riscv: small refactoring for add_memory_int32/64

XMLWordPrintable

    • Icon: Enhancement Enhancement
    • Resolution: Fixed
    • Icon: P4 P4
    • 20
    • 20
    • hotspot
    • b07
    • riscv
    • linux

        Currently, add_memory_int32/64 for riscv can only add a sign-extended 12-bit immediate to memory since they call addi/addiw assembler direcly.

        This constraint could be relaxed when the given memory address is in the expected form: base register plus a sign-extended 12-bit offset. In this case, we can emit code for load + add/sub + store sequence adding arbitrary immediate to memory with no more than two scratch registers (t0 and t1) available.

        We could also refactor these two functions into four seperate functions: increment, incrementw, decrement and decrementw, so that it will be more clear in code logic at the call sites.

              fyang Fei Yang
              fyang Fei Yang
              Votes:
              0 Vote for this issue
              Watchers:
              3 Start watching this issue

                Created:
                Updated:
                Resolved: