[mlir][arith] Adding mul operation regressions (#96975)

Regressions for the mul operation, a part of the original large PR
#92272

Author: pingshiyu

mlir/test/Integration/Dialect/Arith/CPU/multiplication.mlir

@@ -0,0 +1,119 @@
+// RUN: mlir-opt %s --convert-scf-to-cf --convert-cf-to-llvm --convert-vector-to-llvm \
+// RUN:             --convert-func-to-llvm --convert-arith-to-llvm | \
+// RUN:   mlir-cpu-runner -e entry -entry-point-result=void \
+// RUN:                   --shared-libs=%mlir_c_runner_utils | \
+// RUN:   FileCheck %s --match-full-lines
+
+func.func @mulsi_extended_i1(%v1 : i1, %v2 : i1) {
+  vector.print str "@mulsi_extended_i1\n"
+  %low, %high = arith.mulsi_extended %v1, %v2 : i1
+  vector.print %low : i1
+  vector.print %high : i1
+  return
+}
+
+func.func @mulsi_extended_i8(%v1 : i8, %v2 : i8) {
+  vector.print str "@mulsi_extended_i8\n"
+  %low, %high = arith.mulsi_extended %v1, %v2 : i8
+  vector.print %low : i8
+  vector.print %high : i8
+  return
+}
+
+func.func @mulsi_extended() {
+  // ------------------------------------------------
+  // Test i1
+  // ------------------------------------------------
+
+  // mulsi_extended on i1, tests for overflow bit
+  // mulsi_extended 1, 1 : i1 = (1, 0)
+  %true = arith.constant true
+  %false = arith.constant false
+
+  // CHECK-LABEL: @mulsi_extended_i1
+  // CHECK-NEXT:  1
+  // CHECK-NEXT:  0
+  func.call @mulsi_extended_i1(%true, %true) : (i1, i1) -> ()
+
+  // CHECK-LABEL: @mulsi_extended_i1
+  // CHECK-NEXT:  0
+  // CHECK-NEXT:  0
+  func.call @mulsi_extended_i1(%true, %false) : (i1, i1) -> ()
+
+  // CHECK-LABEL: @mulsi_extended_i1
+  // CHECK-NEXT:  0
+  // CHECK-NEXT:  0
+  func.call @mulsi_extended_i1(%false, %true) : (i1, i1) -> ()
+
+  // CHECK-LABEL: @mulsi_extended_i1
+  // CHECK-NEXT:  0
+  // CHECK-NEXT:  0
+  func.call @mulsi_extended_i1(%false, %false) : (i1, i1) -> ()
+
+  // ------------------------------------------------
+  // Test i8
+  // ------------------------------------------------
+  // mulsi extended versions, with overflow
+  %c_100_i8 = arith.constant -100 : i8
+
+  // mulsi_extended -100, -100 : i8 = (16, 39)
+  // CHECK-LABEL: @mulsi_extended_i8
+  // CHECK-NEXT:  16
+  // CHECK-NEXT:  39
+  func.call @mulsi_extended_i8(%c_100_i8, %c_100_i8) : (i8, i8) -> ()
+
+  // ------------------------------------------------
+  // TODO: Test i16, i32 etc.. 
+  // ------------------------------------------------
+  return
+}
+
+func.func @mului_extended_i8(%v1 : i8, %v2 : i8) {
+  vector.print str "@mului_extended_i8\n"
+  %low, %high = arith.mului_extended %v1, %v2 : i8
+  vector.print %low : i8
+  vector.print %high : i8
+  return
+}
+
+func.func @mului_extended() {
+  // ------------------------------------------------
+  // Test i8
+  // ------------------------------------------------
+  %c_n100_i8 = arith.constant -100 : i8
+  %c_156_i8 = arith.constant 156 : i8
+
+  // mului_extended -100, -100 : i8 = (16, 95)
+  // and on equivalent representations (e.g. 156 === -100 (mod 256))
+
+  // CHECK-LABEL: @mului_extended_i8
+  // CHECK-NEXT:  16
+  // CHECK-NEXT:  95
+  func.call @mului_extended_i8(%c_n100_i8, %c_n100_i8) : (i8, i8) -> ()
+
+  // CHECK-LABEL: @mului_extended_i8
+  // CHECK-NEXT:  16
+  // CHECK-NEXT:  95
+  func.call @mului_extended_i8(%c_n100_i8, %c_156_i8) : (i8, i8) -> ()
+
+  // CHECK-LABEL: @mului_extended_i8
+  // CHECK-NEXT:  16
+  // CHECK-NEXT:  95
+  func.call @mului_extended_i8(%c_156_i8, %c_n100_i8) : (i8, i8) -> ()
+
+  // CHECK-LABEL: @mului_extended_i8
+  // CHECK-NEXT:  16
+  // CHECK-NEXT:  95
+  func.call @mului_extended_i8(%c_156_i8, %c_156_i8) : (i8, i8) -> ()
+
+  // ------------------------------------------------
+  // TODO: Test i1, i16, i32 etc.. 
+  // ------------------------------------------------
+  return
+}
+
+func.func @entry() {
+  func.call @mulsi_extended() : () -> ()
+  func.call @mului_extended() : () -> ()
+  return
+}