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[RISCV] Accept fmv.s.x and fmv.x.s as mnemonic aliases for fmv.w.x and fmv.x.w 

These instructions were renamed in version 2.2 of the user-level ISA spec, but 
the old name should also be accepted by standard tools.

llvm-svn: 335154
This commit is contained in:
Alex Bradbury 2018-06-20 18:42:25 +00:00
parent 6f78be66e6
commit fafdebcfcb
2 changed files with 12 additions and 0 deletions
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5
llvm/lib/Target/RISCV/RISCVInstrInfoF.td
View File

@ -226,6 +226,11 @@ def : InstAlias<"fsflags $rd, $rs", (CSRRW GPR:$rd, 0x001, GPR:$rs)>;
def : InstAlias<"fsflags $rs", (CSRRW X0, 0x001, GPR:$rs), 2>;
def : InstAlias<"fsflagsi $rd, $imm", (CSRRWI GPR:$rd, 0x001, uimm5:$imm)>;
def : InstAlias<"fsflagsi $imm", (CSRRWI X0, 0x001, uimm5:$imm), 2>;
// fmv.w.x and fmv.x.w were previously known as fmv.s.x and fmv.x.s. Both
// spellings should be supported by standard tools.
def : MnemonicAlias<"fmv.s.x", "fmv.w.x">;
def : MnemonicAlias<"fmv.x.s", "fmv.x.w">;
} // Predicates = [HasStdExtF]
//===----------------------------------------------------------------------===//

7
llvm/test/MC/RISCV/rvf-aliases-valid.s
View File

@ -87,6 +87,13 @@ fsflagsi x14, 0x1d
# CHECK-ALIAS: fsflagsi 28
fsflagsi 0x1c
# CHECK-INST: fmv.x.w a2, fs7
# CHECK-ALIAS: fmv.x.w a2, fs7
fmv.x.s a2, fs7
# CHECK-INST: fmv.w.x ft1, a6
# CHECK-ALIAS: fmv.w.x ft1, a6
fmv.s.x ft1, a6
##===----------------------------------------------------------------------===##
## Aliases which omit the rounding mode.
##===----------------------------------------------------------------------===##