[PATCH] D68392: [RISCV] Add obsolete aliases of fscsr, frcsr (fssr, frsr)

[Edward Jones via Phabricator via llvm-commits]

edward-jones created this revision.
Herald added subscribers: llvm-commits, pzheng, simoncook, s.egerton, lenary, Jim, benna, psnobl, jocewei, PkmX, rkruppe, the_o, brucehoult, MartinMosbeck, rogfer01, zzheng, MaskRay, jrtc27, shiva0217, kito-cheng, niosHD, sabuasal, apazos, johnrusso, rbar, asb, hiraditya.
Herald added a project: LLVM.

These old aliases were renamed, but are still used by some projects (eg newlib).


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D68392

Files:
  llvm/lib/Target/RISCV/RISCVInstrInfoF.td


Index: llvm/lib/Target/RISCV/RISCVInstrInfoF.td
===================================================================
--- llvm/lib/Target/RISCV/RISCVInstrInfoF.td
+++ llvm/lib/Target/RISCV/RISCVInstrInfoF.td
@@ -227,6 +227,12 @@
 def : InstAlias<"fscsr $rd, $rs", (CSRRW GPR:$rd, FCSR.Encoding, GPR:$rs)>;
 def : InstAlias<"fscsr $rs",      (CSRRW      X0, FCSR.Encoding, GPR:$rs), 2>;
 
+// frsr, fssr are obsolete aliases replaced by frcsr, fscsr, so give them
+// zero weight.
+def : InstAlias<"frsr $rd",       (CSRRS GPR:$rd, FCSR.Encoding, X0), 0>;
+def : InstAlias<"fssr $rd, $rs",  (CSRRW GPR:$rd, FCSR.Encoding, GPR:$rs), 0>;
+def : InstAlias<"fssr $rs",       (CSRRW      X0, FCSR.Encoding, GPR:$rs), 0>;
+
 def : InstAlias<"frrm $rd",        (CSRRS  GPR:$rd, FRM.Encoding, X0), 2>;
 def : InstAlias<"fsrm $rd, $rs",   (CSRRW  GPR:$rd, FRM.Encoding, GPR:$rs)>;
 def : InstAlias<"fsrm $rs",        (CSRRW       X0, FRM.Encoding, GPR:$rs), 2>;


-------------- next part --------------
A non-text attachment was scrubbed...
Name: D68392.223009.patch
Type: text/x-patch
Size: 950 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20191003/4b0f4313/attachment.bin>