[RISCV] Define vector vfwmul intrinsics.

Define vector vfwmul intrinsics and lower them to V instructions.

We work with @rogfer01 from BSC to come out this patch.

Authored-by: Roger Ferrer Ibanez <[email protected]>
Co-Authored-by: Hsiangkai Wang <[email protected]>

Differential Revision: https://reviews.llvm.org/D93584

Author: Hsiangkai

llvm/include/llvm/IR/IntrinsicsRISCV.td

@@ -423,6 +423,8 @@ let TargetPrefix = "riscv" in {
   defm vfdiv : RISCVBinaryAAX;
   defm vfrdiv : RISCVBinaryAAX;
 
+  defm vfwmul : RISCVBinaryABX;
+
   defm vfsgnj : RISCVBinaryAAX;
   defm vfsgnjn : RISCVBinaryAAX;
   defm vfsgnjx : RISCVBinaryAAX;

llvm/lib/Target/RISCV/RISCVInstrInfoVPseudos.td

@@ -1543,6 +1543,11 @@ defm PseudoVFMUL       : VPseudoBinaryV_VV_VX</*IsFloat=*/1>;
 defm PseudoVFDIV       : VPseudoBinaryV_VV_VX</*IsFloat=*/1>;
 defm PseudoVFRDIV      : VPseudoBinaryV_VX</*IsFloat=*/1>;
 
+//===----------------------------------------------------------------------===//
+// 14.5. Vector Widening Floating-Point Multiply
+//===----------------------------------------------------------------------===//
+defm PseudoVFWMUL      : VPseudoBinaryW_VV_VX</*IsFloat=*/1>;
+
 //===----------------------------------------------------------------------===//
 // 14.12. Vector Floating-Point Sign-Injection Instructions
 //===----------------------------------------------------------------------===//
@@ -1829,6 +1834,11 @@ defm "" : VPatBinaryV_VV_VX<"int_riscv_vfmul", "PseudoVFMUL", AllFloatVectors>;
 defm "" : VPatBinaryV_VV_VX<"int_riscv_vfdiv", "PseudoVFDIV", AllFloatVectors>;
 defm "" : VPatBinaryV_VX<"int_riscv_vfrdiv", "PseudoVFRDIV", AllFloatVectors>;
 
+//===----------------------------------------------------------------------===//
+// 14.5. Vector Widening Floating-Point Multiply
+//===----------------------------------------------------------------------===//
+defm "" : VPatBinaryW_VV_VX<"int_riscv_vfwmul", "PseudoVFWMUL", AllWidenableFloatVectors>;
+
 //===----------------------------------------------------------------------===//
 // 14.12. Vector Floating-Point Sign-Injection Instructions
 //===----------------------------------------------------------------------===//