Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC

Commits:

• 2a218737
  by ARATA Mizuki at 2026-03-23T11:11:39-04:00

  Add 128-bit SIMD support to AArch64 NCG
  
  Changes:
  
  - Add `Format` field to vector-capable instructions.
    These instructions will emit `vN.4s` (for example) as a operand.
  - Additional constructors for `Operand`:
    `OpVecLane` represents a vector lane and will be emitted as `vN.<width>[<index>]` (`vN.s[3]` for example).
    `OpScalarAsVec` represents a scalar, but printed as a vector lane like `vN.<width>[0]` (`vN.s[0]` for example).
  - Integer quot/rem are implemented in C, like x86.
  
  Closes #26536
  
  Metric Increase:
      T3294
  

• 5d6e2be9
  by ARATA Mizuki at 2026-03-23T11:11:39-04:00

  AArch64 NCG: Improve code generation for floating-point and vector constants
  
  Some floating-point constants can be directly encoded using the FMOV instruction.
  Similarly, a class of vectors with same values can be encoded using FMOV, MOVI, or MVNI.
  

24 changed files:

• compiler/CodeGen.Platform.h
• compiler/GHC/CmmToAsm/AArch64/CodeGen.hs
• compiler/GHC/CmmToAsm/AArch64/Instr.hs
• compiler/GHC/CmmToAsm/AArch64/Ppr.hs
• compiler/GHC/CmmToAsm/AArch64/Regs.hs
• compiler/GHC/CmmToAsm/Reg/Graph/TrivColorable.hs
• compiler/GHC/Driver/Config/StgToCmm.hs
• docs/users_guide/9.16.1-notes.rst
• rts/include/stg/Prim.h
• rts/prim/vectorQuotRem.c
• + testsuite/tests/simd/should_run/FloatConstant.hs
• + testsuite/tests/simd/should_run/FloatConstant.stdout
• + testsuite/tests/simd/should_run/IntConstant.hs
• + testsuite/tests/simd/should_run/IntConstant.stdout
• testsuite/tests/simd/should_run/all.T
• testsuite/tests/simd/should_run/int16x8_shuffle.hs
• testsuite/tests/simd/should_run/int16x8_shuffle.stdout
• testsuite/tests/simd/should_run/int16x8_shuffle_baseline.hs
• testsuite/tests/simd/should_run/int16x8_shuffle_baseline.stdout
• testsuite/tests/simd/should_run/int8x16_shuffle.hs
• testsuite/tests/simd/should_run/int8x16_shuffle.stdout
• testsuite/tests/simd/should_run/int8x16_shuffle_baseline.hs
• testsuite/tests/simd/should_run/int8x16_shuffle_baseline.stdout
• testsuite/tests/simd/should_run/simd013C.c

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