[llvm] [SPIR-V] Implement SPV_KHR_float_controls2 (PR #146941)

[Dmitry Sidorov via llvm-commits]

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@@ -995,4 +1033,22 @@ unsigned getArrayComponentCount(const MachineRegisterInfo *MRI,
   return foldImm(ResType->getOperand(2), MRI);
 }
 
+size_t computeFPFastMathDefaultInfoVecIndex(size_t BitWidth) {
+  switch (BitWidth) {
+  case 16: // half
+    return 0;
+  case 32: // float
+    return 1;
+  case 64: // double
+    return 2;
+  case 128: // fp128
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MrSidims wrote:

How does SPIR-V BE handle 128-bit fp type?

https://github.com/llvm/llvm-project/pull/146941