[PATCH] D128898: [LoongArch] Add codegen support for handling floating point immediates

[Xi Ruoyao via Phabricator via llvm-commits]

xry111 added inline comments.


================
Comment at: llvm/test/CodeGen/LoongArch/double-imm.ll:86
+; LA64-NEXT:    movgr2fr.d $fa0, $a0
+; LA64-NEXT:    ffint.d.l $fa0, $fa0
+; LA64-NEXT:    jirl $zero, $ra, 0
----------------
I'd suggest:

```
lu52i.d $a0, $zero, 0x3ff
movgr2fr.d $fa0, $a0
```

to reduce one instruction.  The combination of lu52i.d and movgr2fr.d can always load $2^k$ as a f64 for all integral k in $[0, 1023]$.

But as it's already approved it can be done in a later revision.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D128898/new/

https://reviews.llvm.org/D128898