[RISCV] Update MicroOpBufferSize in P400 & P600 scheduling models

TBA...

Author: mshockwave

llvm/lib/Target/RISCV/RISCVSchedSiFiveP400.td

@@ -119,7 +119,7 @@ class SiFiveP400VSM3CCycles<string mx> {
 
 def SiFiveP400Model : SchedMachineModel {
   let IssueWidth = 3;         // 3 micro-ops are dispatched per cycle.
-  let MicroOpBufferSize = 56; // Max micro-ops that can be buffered.
+  let MicroOpBufferSize = 96; // Max micro-ops that can be buffered.
   let LoadLatency = 4;        // Cycles for loads to access the cache.
   let MispredictPenalty = 9;  // Extra cycles for a mispredicted branch.
   let UnsupportedFeatures = [HasStdExtZbkb, HasStdExtZbkc, HasStdExtZbkx,

llvm/lib/Target/RISCV/RISCVSchedSiFiveP600.td

@@ -286,10 +286,10 @@ class SiFiveP600VSHA2MSCycles<string mx, int sew> {
 
 // SiFiveP600 machine model for scheduling and other instruction cost heuristics.
 def SiFiveP600Model : SchedMachineModel {
-  let IssueWidth = 4;         // 4 micro-ops are dispatched per cycle.
-  let MicroOpBufferSize = 160; // Max micro-ops that can be buffered.
-  let LoadLatency = 4;        // Cycles for loads to access the cache.
-  let MispredictPenalty = 9;  // Extra cycles for a mispredicted branch.
+  let IssueWidth = 4;          // 4 micro-ops are dispatched per cycle.
+  let MicroOpBufferSize = 192; // Max micro-ops that can be buffered.
+  let LoadLatency = 4;         // Cycles for loads to access the cache.
+  let MispredictPenalty = 9;   // Extra cycles for a mispredicted branch.
   let UnsupportedFeatures = [HasStdExtZbkb, HasStdExtZbkc, HasStdExtZbkx,
                              HasStdExtZknd, HasStdExtZkne, HasStdExtZknh,
                              HasStdExtZksed, HasStdExtZksh, HasStdExtZkr,

llvm/test/tools/llvm-mca/RISCV/SiFiveP400/div.s

@@ -328,12 +328,12 @@ vfsqrt.v v8, v16
 
 # CHECK:      Iterations:        1
 # CHECK-NEXT: Instructions:      320
-# CHECK-NEXT: Total Cycles:      22358
+# CHECK-NEXT: Total Cycles:      19388
 # CHECK-NEXT: Total uOps:        320
 
 # CHECK:      Dispatch Width:    3
-# CHECK-NEXT: uOps Per Cycle:    0.01
-# CHECK-NEXT: IPC:               0.01
+# CHECK-NEXT: uOps Per Cycle:    0.02
+# CHECK-NEXT: IPC:               0.02
 # CHECK-NEXT: Block RThroughput: 14361.0
 
 # CHECK:      Instruction Info:

llvm/test/tools/llvm-mca/RISCV/SiFiveP400/vlseg-vsseg.s

@@ -1606,7 +1606,7 @@ vsoxseg8ei64.v  v8, (a0), v16
 
 # CHECK:      Iterations:        1
 # CHECK-NEXT: Instructions:      1540
-# CHECK-NEXT: Total Cycles:      29967
+# CHECK-NEXT: Total Cycles:      28335
 # CHECK-NEXT: Total uOps:        1540
 
 # CHECK:      Dispatch Width:    3

llvm/test/tools/llvm-mca/RISCV/SiFiveP600/div.s

@@ -328,7 +328,7 @@ vfsqrt.v v8, v16
 
 # CHECK:      Iterations:        1
 # CHECK-NEXT: Instructions:      320
-# CHECK-NEXT: Total Cycles:      14613
+# CHECK-NEXT: Total Cycles:      14397
 # CHECK-NEXT: Total uOps:        320
 
 # CHECK:      Dispatch Width:    4