riscv_test_refine_thead_imm

Fix: Make T-Head testing pattern more generic

• Status: Merged for Binutils 2.42
• Branch: riscv-test-refine-thead-imm
• Tracking PR: #98 (view Pull Request and Diff)
• Mailing List:
  • PATCH v1 (2022-12-29)
    • PING^1 (2023-08-11)

Issue Solved

On some T-Head vendor extensions, we test against the constant 18446744073709551615 (that is 2^64-1) to detect invalid immediate errors on -1. However, it heavily depends on the fact that the value used to print immediate value is a 64-bit unsigned type and this constant is not (and should not be) important (we just want to know that -1 is not valid).

This branch replaces all such occurrences of 18446744073709551615 with a more generic regular expression.