[RISCV][CodeGen] Chapter of vector instruction type corresponds with chapters in RISCV vector specification. NFC

[michaelmaitland]

Summary

The vector spec is organized in chapters
based on instruction type. The comments in the tablegen marked the incorrect chapters. This change
updates the comments with the correct chapter numbers.

[craig.topper]

llvm/lib/Target/RISCV/RISCVScheduleV.td

834

Is this one also wrong?

[michaelmaitland]

Fix vector permutation instructions too

[craig.topper]

LGTM

llvm/lib/Target/RISCV/RISCVScheduleV.td

 defm "" : LMULWriteRes<"WriteVIWMulAddX", [], SchedMxListW>;
 defm "" : LMULWriteRes<"WriteVIMergeV", []>;
 defm "" : LMULWriteRes<"WriteVIMergeX", []>;
 defm "" : LMULWriteRes<"WriteVIMergeI", []>;
 defm "" : LMULWriteRes<"WriteVIMovV", []>;
 defm "" : LMULWriteRes<"WriteVIMovX", []>;
 defm "" : LMULWriteRes<"WriteVIMovI", []>;
 
-// 13. Vector Fixed-Point Arithmetic Instructions
+// 12. Vector Fixed-Point Arithmetic Instructions
 def : WriteRes<WriteVSALUV, []>;
 def : WriteRes<WriteVSALUX, []>;
 def : WriteRes<WriteVSALUI, []>;
 def : WriteRes<WriteVAALUV, []>;
 def : WriteRes<WriteVAALUX, []>;
 def : WriteRes<WriteVSMulV, []>;
 def : WriteRes<WriteVSMulX, []>;
 def : WriteRes<WriteVSShiftV, []>;
 def : WriteRes<WriteVSShiftX, []>;
 def : WriteRes<WriteVSShiftI, []>;
 def : WriteRes<WriteVNClipV, []>;
 def : WriteRes<WriteVNClipX, []>;
 def : WriteRes<WriteVNClipI, []>;
 
-// 14. Vector Floating-Point Instructions
+// 13. Vector Floating-Point Instructions
 def : WriteRes<WriteVFALUV, []>;
 def : WriteRes<WriteVFALUF, []>;
 def : WriteRes<WriteVFWALUV, []>;
 def : WriteRes<WriteVFWALUF, []>;
 def : WriteRes<WriteVFMulV, []>;
 def : WriteRes<WriteVFMulF, []>;
 def : WriteRes<WriteVFDivV, []>;
 def : WriteRes<WriteVFDivF, []>;

 def : WriteRes<WriteVFCvtFToIV, []>;
 def : WriteRes<WriteVFWCvtIToFV, []>;
 def : WriteRes<WriteVFWCvtFToIV, []>;
 def : WriteRes<WriteVFWCvtFToFV, []>;
 def : WriteRes<WriteVFNCvtIToFV, []>;
 def : WriteRes<WriteVFNCvtFToIV, []>;
 def : WriteRes<WriteVFNCvtFToFV, []>;
 
-// 15. Vector Reduction Operations
+// 14. Vector Reduction Operations
 def : WriteRes<WriteVIRedV, []>;
 def : WriteRes<WriteVIWRedV, []>;
 def : WriteRes<WriteVFRedV, []>;
 def : WriteRes<WriteVFRedOV, []>;
 def : WriteRes<WriteVFWRedV, []>;
 def : WriteRes<WriteVFWRedOV, []>;
 
-// 16. Vector Mask Instructions
+// 15. Vector Mask Instructions
 def : WriteRes<WriteVMALUV, []>;
 def : WriteRes<WriteVMPopV, []>;
 def : WriteRes<WriteVMFFSV, []>;
 def : WriteRes<WriteVMSFSV, []>;
 def : WriteRes<WriteVMIotV, []>;
 def : WriteRes<WriteVMIdxV, []>;
 
 // 17. Vector Permutation Instructions

 defm "" : LMULReadAdvance<"ReadVIMulAddX", 0>;
 defm "" : LMULReadAdvance<"ReadVIWMulAddV", 0, SchedMxListW>;
 defm "" : LMULReadAdvance<"ReadVIWMulAddX", 0, SchedMxListW>;
 defm "" : LMULReadAdvance<"ReadVIMergeV", 0>;
 defm "" : LMULReadAdvance<"ReadVIMergeX", 0>;
 defm "" : LMULReadAdvance<"ReadVIMovV", 0>;
 defm "" : LMULReadAdvance<"ReadVIMovX", 0>;
 
-// 13. Vector Fixed-Point Arithmetic Instructions
+// 12. Vector Fixed-Point Arithmetic Instructions
 def : ReadAdvance<ReadVSALUV, 0>;
 def : ReadAdvance<ReadVSALUX, 0>;
 def : ReadAdvance<ReadVAALUV, 0>;
 def : ReadAdvance<ReadVAALUX, 0>;
 def : ReadAdvance<ReadVSMulV, 0>;
 def : ReadAdvance<ReadVSMulX, 0>;
 def : ReadAdvance<ReadVSShiftV, 0>;
 def : ReadAdvance<ReadVSShiftX, 0>;
 def : ReadAdvance<ReadVNClipV, 0>;
 def : ReadAdvance<ReadVNClipX, 0>;
 
-// 14. Vector Floating-Point Instructions
+// 13. Vector Floating-Point Instructions
 def : ReadAdvance<ReadVFALUV, 0>;
 def : ReadAdvance<ReadVFALUF, 0>;
 def : ReadAdvance<ReadVFWALUV, 0>;
 def : ReadAdvance<ReadVFWALUF, 0>;
 def : ReadAdvance<ReadVFMulV, 0>;
 def : ReadAdvance<ReadVFMulF, 0>;
 def : ReadAdvance<ReadVFDivV, 0>;
 def : ReadAdvance<ReadVFDivF, 0>;

 def : ReadAdvance<ReadVFCvtFToIV, 0>;
 def : ReadAdvance<ReadVFWCvtIToFV, 0>;
 def : ReadAdvance<ReadVFWCvtFToIV, 0>;
 def : ReadAdvance<ReadVFWCvtFToFV, 0>;
 def : ReadAdvance<ReadVFNCvtIToFV, 0>;
 def : ReadAdvance<ReadVFNCvtFToIV, 0>;
 def : ReadAdvance<ReadVFNCvtFToFV, 0>;
 
-// 15. Vector Reduction Operations
+// 14. Vector Reduction Operations
 def : ReadAdvance<ReadVIRedV, 0>;
 def : ReadAdvance<ReadVIRedV0, 0>;
 def : ReadAdvance<ReadVIWRedV, 0>;
 def : ReadAdvance<ReadVIWRedV0, 0>;
 def : ReadAdvance<ReadVFRedV, 0>;
 def : ReadAdvance<ReadVFRedV0, 0>;
 def : ReadAdvance<ReadVFRedOV, 0>;
 def : ReadAdvance<ReadVFRedOV0, 0>;
 def : ReadAdvance<ReadVFWRedV, 0>;
 def : ReadAdvance<ReadVFWRedV0, 0>;
 def : ReadAdvance<ReadVFWRedOV, 0>;
 def : ReadAdvance<ReadVFWRedOV0, 0>;
 
-// 16. Vector Mask Instructions
+// 15. Vector Mask Instructions
 def : ReadAdvance<ReadVMALUV, 0>;
 def : ReadAdvance<ReadVMPopV, 0>;
 def : ReadAdvance<ReadVMFFSV, 0>;
 def : ReadAdvance<ReadVMSFSV, 0>;
 def : ReadAdvance<ReadVMIotV, 0>;
 
 // 17. Vector Permutation Instructions
 def : ReadAdvance<ReadVIMovVX, 0>;
 def : ReadAdvance<ReadVIMovXV, 0>;
 def : ReadAdvance<ReadVIMovXX, 0>;
 def : ReadAdvance<ReadVFMovVF, 0>;
 def : ReadAdvance<ReadVFMovFV, 0>;
 def : ReadAdvance<ReadVFMovFX, 0>;
 def : ReadAdvance<ReadVISlideV, 0>;
 def : ReadAdvance<ReadVISlideX, 0>;