================
@@ -1749,6 +1749,60 @@ bool
AArch64LegalizerInfo::legalizeIntrinsic(LegalizerHelper &Helper,
MI.eraseFromParent();
return true;
}
+ case Intrinsic::aarch64_range_prefetch_imm: {
+ auto &AddrVal = MI.getOperand(1);
+
+ int64_t IsWrite = MI.getOperand(2).getImm();
+ int64_t IsStream = MI.getOperand(3).getImm();
+ unsigned PrfOp = (IsStream << 2) | IsWrite;
+
+ int64_t Length = MI.getOperand(4).getImm();
+ int64_t Count = MI.getOperand(5).getImm() - 1;
+ int64_t Stride = MI.getOperand(6).getImm();
+
+ // Map ReuseDistance given in bytes to four bits representing decreasing
+ // powers of two in the range 512MiB (0b0001) to 32KiB (0b1111). Values
+ // are rounded up to the nearest power of 2, starting at 32KiB. Any value
+ // over the maximum is represented by 0 (distance not known).
+ uint64_t Distance = MI.getOperand(7).getImm();
+ if (Distance > 0) {
+ Distance = llvm::Log2_32_Ceil(Distance);
+ if (Distance < 15)
+ Distance = 15;
+ else if (Distance > 29)
+ Distance = 0;
+ else
+ Distance = 30 - Distance;
+ }
+
+ uint64_t Mask22 = (1ULL << 22) - 1;
+ uint64_t Mask16 = (1ULL << 16) - 1;
+ uint64_t Metadata = (Distance << 60) | ((Stride & Mask22) << 38) |
+ ((Count & Mask16) << 22) | (Length & Mask22);
----------------
paulwalker-arm wrote:
It's worth creating a utility function (perhaps in AArch64AddressingModes.h?)
so this can be shared between the two selection paths.
https://github.com/llvm/llvm-project/pull/170490
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