[PATCH] D13472: [mips][msa] Remove copy_u.d and move copy_u.w to MSA64.

[Daniel Sanders via llvm-commits]

dsanders created this revision.
dsanders added a reviewer: vkalintiris.
dsanders added a subscriber: llvm-commits.

The forwards compatibility strategy employed by MIPS is to consider registers
to be infinitely sign-extended. Then on ISA's with a wider register, the result
of existing instructions are sign-extended to register width and zero-extended
counterparts are added. copy_u.w on MSA32 and copy_u.w on MSA64 violate this
strategy and we have therefore corrected the MSA specs to fix this.

We still keep track of sign/zero-extension during legalization but we now
match copy_s.[wd] where required.

http://reviews.llvm.org/D13472

Files:
  lib/Target/Mips/MipsDSPInstrInfo.td
  lib/Target/Mips/MipsInstrInfo.td
  lib/Target/Mips/MipsMSAInstrInfo.td
  test/CodeGen/Mips/msa/elm_copy.ll
  test/MC/Disassembler/Mips/msa/test_elm.txt
  test/MC/Disassembler/Mips/msa/test_elm_msa64.txt
  test/MC/Mips/msa/test_elm.s
  test/MC/Mips/msa/test_elm_msa64.s

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