Fix test-rsqrt.mlir to accept AMD's approximation of rsqrt as well

[mehdi_amini]

Summary

These kind of function can behave differently on these X86 chips, there
isn't really "one true answer" so we'll accept both.

[cota]

mlir/test/Integration/Dialect/Vector/CPU/X86Vector/test-rsqrt.mlir

11–12

results

11–12

accept

11–12

results

11–12

produce

mlir/test/Integration/Dialect/Vector/CPU/X86Vector/test-rsqrt.mlir

-// RUN: mlir-opt %s -convert-scf-to-std -convert-vector-to-llvm="enable-x86vector" -convert-std-to-llvm -reconcile-unrealized-casts | \
+// RUN: mlir-opt %s -convert-vector-to-llvm="enable-x86vector" -convert-std-to-llvm | \
 // RUN: mlir-translate --mlir-to-llvmir | \
-// RUN: %lli --entry-function=entry --mattr="avx512bw" --dlopen=%mlir_integration_test_dir/libmlir_c_runner_utils%shlibext | \
+// RUN: %lli --entry-function=entry --mattr="avx" --dlopen=%mlir_integration_test_dir/libmlir_c_runner_utils%shlibext | \
 // RUN: FileCheck %s
 
 func @entry() -> i32 {
   %i0 = constant 0 : i32
 
   %v = std.constant dense<[0.125, 0.25, 0.5, 1.0, 2.0, 4.0, 8.0, 16.0]> : vector<8xf32>
   %r = x86vector.avx.rsqrt %v : vector<8xf32>
-  // CHECK: ( 2.82764, 1.99951, 1.41382, 0.999756, 0.706909, 0.499878, 0.353455, 0.249939 )
+  // `rsqrt` may produce slightly different results on Intel and AMD machines: accept both results here.
+  // CHECK: {{( 2.82764, 1.99951, 1.41382, 0.999756, 0.706909, 0.499878, 0.353455, 0.249939 | 2.82812, 1.99976, 1.41406, 0.999878, 0.707031, 0.499939, 0.353516, 0.249969 )}}
   vector.print %r : vector<8xf32>
 
   return %i0 : i32
 }