================
@@ -1876,6 +1876,15 @@ let SVETargetGuard = "(sve2|sme2),lut", SMETargetGuard =
"sme2,lut" in {
def SVLUTI4_x2 : SInst<"svluti4_lane[_{d}_x2]", "d2.d[i", "sUshb",
MergeNone, "aarch64_sve_luti4_lane_x2", [VerifyRuntimeMode], [ImmCheck<2,
ImmCheck0_3>]>;
}
+let SVETargetGuard = "sve2p3", SMETargetGuard = InvalidMode in {
+ def SVLUTI6 : SInst<"svluti6[_{d}]", "d2u", "cUcm", MergeNone,
"aarch64_sve_luti6", [IsOverloadNone]>;
----------------
jthackray wrote:
The ACLE says:
```
#### LUTI6
Lookup table read with 6-bit indices (8-bit).
Use of this intrinsic if `svcntb() * 8 < 256` results in undefined behaviour.
```c
// Variant is also available for: _u8 _mf8
svint8_t svluti6[_s8](svint8x2_t table, svuint8_t indices);
```
here:
https://github.com/ARM-software/acle/pull/428/changes#diff-516526d4a18101dc85300bc2033d0f86dc46c505b7510a7694baabea851aedfaR10039-R10048
So if we think it's wrong, we should adjust the ACLE first.
https://github.com/llvm/llvm-project/pull/187046
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