[justsmth]

Issues:

Addresses #3028

Description of changes:

When GCC 15 compiles the FIPS module at -O3 on aarch64, it emits fmov instructions with floating-point immediates (e.g. fmov v8.4s, #2.0e+0). The delocator's PEG grammar only supports integer immediates, so it parses #2.0e+0 as the integer #2 followed by what it thinks is a symbol reference .0e. This gets turned into a redirector (.Lbcm_redirector_.0e), producing invalid assembly.

This change fixes the issue in two ways:

• Grammar fix: Adds a floating-point immediate alternative to the RegisterOrConstant rule in delocate.peg, so values like #2.0e+0 are parsed as a single token.
• Pass-through: Adds fmov to the special-case instruction list in processAarch64Instruction(). Since fmov only operates on registers and immediates (never memory), it never needs delocating and can safely be written through unchanged.

The GCC 15 + FIPS exclusion in arm-gcc-tests CI is also removed now that the underlying issue is resolved.

Call-outs:

The delocate.peg.go file is regenerated from the grammar using the peg tool. The grammar change is the one line in delocate.peg; the rest of that file is mechanical.

Testing:

• Added 6 test cases to testdata/aarch64-Basic/in.s covering float immediates with exponent notation, simple decimals, negative values, fractional values, scalar forms, and register-to-register fmov.
• All 19 existing delocator tests continue to pass.
• Re-enabled the arm-gcc-tests CI matrix entry for GCC 15 + FIPS on arm64 which will validate the end-to-end build.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license and the ISC license.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.34%. Comparing base (0628190) to head (95eacde).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3029      +/-   ##
==========================================
- Coverage   78.35%   78.34%   -0.02%     
==========================================
  Files         689      689              
  Lines      121010   121010              
  Branches    16992    16990       -2     
==========================================
- Hits        94813    94800      -13     
- Misses      25302    25314      +12     
- Partials      895      896       +1     

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