[llvm] [RISCV] Remove SiFive7PipeV and replace it with SiFive7VCQ (PR #73969)

[Michael Maitland via llvm-commits]

================
@@ -850,69 +859,69 @@ foreach mx = SchedMxListFWRed in {
 foreach mx = SchedMxList in {
   defvar Cycles = SiFive7GetCyclesVMask<mx>.c;
   defvar IsWorstCase = SiFive7IsWorstCaseMX<mx, SchedMxList>.c;
-  let Latency = 4, ReleaseAtCycles = [Cycles] in {
-    defm "" : LMULWriteResMX<"WriteVMALUV", [SiFive7VA], mx, IsWorstCase>;
-    defm "" : LMULWriteResMX<"WriteVMPopV", [SiFive7VA], mx, IsWorstCase>;
-    defm "" : LMULWriteResMX<"WriteVMFFSV", [SiFive7VA], mx, IsWorstCase>;
-    defm "" : LMULWriteResMX<"WriteVMSFSV", [SiFive7VA], mx, IsWorstCase>;
+  let Latency = 4, AcquireAtCycles = [0, 1], ReleaseAtCycles = [1, !add(1, Cycles)] in {
+    defm "" : LMULWriteResMX<"WriteVMALUV", [SiFive7VCQ, SiFive7VA], mx, IsWorstCase>;
+    defm "" : LMULWriteResMX<"WriteVMPopV", [SiFive7VCQ, SiFive7VA], mx, IsWorstCase>;
+    defm "" : LMULWriteResMX<"WriteVMFFSV", [SiFive7VCQ, SiFive7VA], mx, IsWorstCase>;
+    defm "" : LMULWriteResMX<"WriteVMSFSV", [SiFive7VCQ, SiFive7VA], mx, IsWorstCase>;
   }
 }
 foreach mx = SchedMxList in {
   defvar Cycles = SiFive7GetCyclesDefault<mx>.c;
   defvar IsWorstCase = SiFive7IsWorstCaseMX<mx, SchedMxList>.c;
-  let Latency = 4, ReleaseAtCycles = [Cycles] in {
-    defm "" : LMULWriteResMX<"WriteVMIotV", [SiFive7VA], mx, IsWorstCase>;
-    defm "" : LMULWriteResMX<"WriteVMIdxV", [SiFive7VA], mx, IsWorstCase>;
+  let Latency = 4, AcquireAtCycles = [0, 1], ReleaseAtCycles = [1, !add(1, Cycles)] in {
+    defm "" : LMULWriteResMX<"WriteVMIotV", [SiFive7VCQ, SiFive7VA], mx, IsWorstCase>;
+    defm "" : LMULWriteResMX<"WriteVMIdxV", [SiFive7VCQ, SiFive7VA], mx, IsWorstCase>;
   }
 }
 
 // 16. Vector Permutation Instructions
-let Latency = 4, ReleaseAtCycles = [1] in {
-  def : WriteRes<WriteVIMovVX, [SiFive7VA]>;
-  def : WriteRes<WriteVIMovXV, [SiFive7VA]>;
-  def : WriteRes<WriteVFMovVF, [SiFive7VA]>;
-  def : WriteRes<WriteVFMovFV, [SiFive7VA]>;
+let Latency = 4, AcquireAtCycles = [0, 1], ReleaseAtCycles = [1, !add(1, 1)] in {
+  def : WriteRes<WriteVIMovVX, [SiFive7VCQ, SiFive7VA]>;
+  def : WriteRes<WriteVIMovXV, [SiFive7VCQ, SiFive7VA]>;
+  def : WriteRes<WriteVFMovVF, [SiFive7VCQ, SiFive7VA]>;
+  def : WriteRes<WriteVFMovFV, [SiFive7VCQ, SiFive7VA]>;
 }
 foreach mx = SchedMxList in {
   defvar Cycles = SiFive7GetCyclesDefault<mx>.c;
   defvar IsWorstCase = SiFive7IsWorstCaseMX<mx, SchedMxList>.c;
-  let Latency = 8, ReleaseAtCycles = [Cycles] in {
-    defm "" : LMULWriteResMX<"WriteVRGatherVX",    [SiFive7VA], mx, IsWorstCase>;
-    defm "" : LMULWriteResMX<"WriteVRGatherVI",    [SiFive7VA], mx, IsWorstCase>;
+  let Latency = 8, AcquireAtCycles = [0, 1], ReleaseAtCycles = [1, !add(1, Cycles)] in {
+    defm "" : LMULWriteResMX<"WriteVRGatherVX",    [SiFive7VCQ, SiFive7VA], mx, IsWorstCase>;
+    defm "" : LMULWriteResMX<"WriteVRGatherVI",    [SiFive7VCQ, SiFive7VA], mx, IsWorstCase>;
   }
 }
 
 foreach mx = SchedMxList in {
   foreach sew = SchedSEWSet<mx>.val in {
     defvar Cycles = SiFive7GetCyclesOnePerElement<mx, sew>.c;
     defvar IsWorstCase = SiFive7IsWorstCaseMXSEW<mx, sew, SchedMxList>.c;
-    let Latency = !add(Cycles, 3), ReleaseAtCycles = [Cycles] in {
-      defm "" : LMULSEWWriteResMXSEW<"WriteVRGatherVV", [SiFive7VA], mx, sew, IsWorstCase>;
-      defm "" : LMULSEWWriteResMXSEW<"WriteVCompressV", [SiFive7VA], mx, sew, IsWorstCase>;
+    let Latency = !add(Cycles, 3), AcquireAtCycles = [0, 1], ReleaseAtCycles = [1, !add(1, Cycles)] in {
+      defm "" : LMULSEWWriteResMXSEW<"WriteVRGatherVV", [SiFive7VCQ, SiFive7VA], mx, sew, IsWorstCase>;
+      defm "" : LMULSEWWriteResMXSEW<"WriteVCompressV", [SiFive7VCQ, SiFive7VA], mx, sew, IsWorstCase>;
     }
   }
 }
 
 foreach mx = SchedMxList in {
   defvar Cycles = SiFive7GetCyclesDefault<mx>.c;
   defvar IsWorstCase = SiFive7IsWorstCaseMX<mx, SchedMxList>.c;
-  let Latency = 4, ReleaseAtCycles = [Cycles] in {
-    defm "" : LMULWriteResMX<"WriteVISlideX",   [SiFive7VA], mx, IsWorstCase>;
-    defm "" : LMULWriteResMX<"WriteVISlideI",   [SiFive7VA], mx, IsWorstCase>;
-    defm "" : LMULWriteResMX<"WriteVISlide1X",  [SiFive7VA], mx, IsWorstCase>;
-    defm "" : LMULWriteResMX<"WriteVFSlide1F",  [SiFive7VA], mx, IsWorstCase>;
+  let Latency = 4, AcquireAtCycles = [0, 1], ReleaseAtCycles = [1, !add(1, Cycles)] in {
+    defm "" : LMULWriteResMX<"WriteVISlideX",   [SiFive7VCQ, SiFive7VA], mx, IsWorstCase>;
+    defm "" : LMULWriteResMX<"WriteVISlideI",   [SiFive7VCQ, SiFive7VA], mx, IsWorstCase>;
+    defm "" : LMULWriteResMX<"WriteVISlide1X",  [SiFive7VCQ, SiFive7VA], mx, IsWorstCase>;
+    defm "" : LMULWriteResMX<"WriteVFSlide1F",  [SiFive7VCQ, SiFive7VA], mx, IsWorstCase>;
   }
 }
 
 // VMov*V is LMUL Aware
-let Latency = 4, ReleaseAtCycles = [2] in
-  def : WriteRes<WriteVMov1V,     [SiFive7VA]>;
-let Latency = 4, ReleaseAtCycles = [4] in
-  def : WriteRes<WriteVMov2V,     [SiFive7VA]>;
-let Latency = 4, ReleaseAtCycles = [8] in
-  def : WriteRes<WriteVMov4V,     [SiFive7VA]>;
-let Latency = 4, ReleaseAtCycles = [16] in
-  def : WriteRes<WriteVMov8V,     [SiFive7VA]>;
+let Latency = 4, AcquireAtCycles = [0, 1], ReleaseAtCycles = [1, !add(1, 2)] in
----------------
michaelmaitland wrote:

I left it as `add` to show that one part of the formula came from the delay in execution from the VCQ and the other is the number of cycles that the execution takes. I left it as this so we can easily compare the execution cycles to the spreadsheet of execution cycles collected on real hardware, without having to subtract 1 in our head each time.

I can simplify it if you'd like.

https://github.com/llvm/llvm-project/pull/73969