[PATCH] D78887: [VE] Support floating point immediate values

[Kazushi Marukawa via Phabricator via llvm-commits]

kaz7 marked an inline comment as done.
kaz7 added inline comments.


================
Comment at: llvm/test/CodeGen/VE/fp_mul.ll:97
+; CHECK-NEXT:    or %s11, 0, %s9
+  %r = fmul float %a, 1.175494210692441075487029444849287348827052428745893333857174530571588870475618904265502351336181163787841796875E-38
+  ret float %r
----------------
simoll wrote:
> kaz7 wrote:
> > simoll wrote:
> > > I guess this is one of those cases where it makes sense to use a fp hex constant: it is shorter and the expected output relates to the bitencoding anyway.
> > I wish I could.  Recently, llvm is modified to not use hex values in llvm-ir.  After that, llc doesn't accept hex values when I tried to use hex values.  Please let me know if you know how to write it in the current version.  Thanks.
> The IR in line 61 uses a hex fp constant. I'd expect this to work here too.
Yeah.  That causes these errors.  I tried them and I failed previously.

If I try 0x007FFFFF:
```
/usr/uhome/aurora/fccg/marukawa/llvm-dev/build-debug-upstream/bin/llc: error: /usr/uhome/aurora/fccg/marukawa/llvm-dev/build-debug-upstream/bin/llc: <stdin>:97:23: error: floating point constant invalid for type
  %r = fmul float %a, 0x007FFFFF
```
If I try 0x007FFFFFFFFFFFFF:
```
/usr/uhome/aurora/fccg/marukawa/llvm-dev/build-debug-upstream/bin/llc: error: /usr/uhome/aurora/fccg/marukawa/llvm-dev/build-debug-upstream/bin/llc: <stdin>:97:23: error: floating point constant invalid for type
  %r = fmul float %a, 0x007FFFFFFFFFFFFF
```


Repository:
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https://reviews.llvm.org/D78887