Support pending Intel extensions (#4116)

This patch supports new Intel extensions added via
https://github.com/KhronosGroup/SPIRV-Headers/pull/176

SPV_INTEL_fooat_controls2 requires extra support to add
two new operand types:
   SPV_OPERAND_TYPE_FPDENORM_MODE
   SPV_OPERAND_TYPE_FPOPERATION_MODE

include/spirv-tools/libspirv.h

@@ -260,6 +260,11 @@ typedef enum spv_operand_type_t {
   SPV_OPERAND_TYPE_CLDEBUG100_DEBUG_OPERATION,                     // Sec 3.6
   SPV_OPERAND_TYPE_CLDEBUG100_DEBUG_IMPORTED_ENTITY,               // Sec 3.7
 
+  // The following are concrete enum types from SPV_INTEL_float_controls2
+  // https://github.com/intel/llvm/blob/39fa9b0cbfbae88327118990a05c5b387b56d2ef/sycl/doc/extensions/SPIRV/SPV_INTEL_float_controls2.asciidoc
+  SPV_OPERAND_TYPE_FPDENORM_MODE,     // Sec 3.17 FP Denorm Mode
+  SPV_OPERAND_TYPE_FPOPERATION_MODE,  // Sec 3.18 FP Operation Mode
+
   // This is a sentinel value, and does not represent an operand type.
   // It should come last.
   SPV_OPERAND_TYPE_NUM_OPERAND_TYPES,

source/binary.cpp

@@ -655,7 +655,9 @@ spv_result_t Parser::parseOperand(size_t inst_offset,
     case SPV_OPERAND_TYPE_CLDEBUG100_DEBUG_COMPOSITE_TYPE:
     case SPV_OPERAND_TYPE_CLDEBUG100_DEBUG_TYPE_QUALIFIER:
     case SPV_OPERAND_TYPE_CLDEBUG100_DEBUG_OPERATION:
-    case SPV_OPERAND_TYPE_CLDEBUG100_DEBUG_IMPORTED_ENTITY: {
+    case SPV_OPERAND_TYPE_CLDEBUG100_DEBUG_IMPORTED_ENTITY:
+    case SPV_OPERAND_TYPE_FPDENORM_MODE:
+    case SPV_OPERAND_TYPE_FPOPERATION_MODE: {
       // A single word that is a plain enum value.
 
       // Map an optional operand type to its corresponding concrete type.

source/disassemble.cpp

@@ -326,7 +326,9 @@ void Disassembler::EmitOperand(const spv_parsed_instruction_t& inst,
     case SPV_OPERAND_TYPE_CLDEBUG100_DEBUG_COMPOSITE_TYPE:
     case SPV_OPERAND_TYPE_CLDEBUG100_DEBUG_TYPE_QUALIFIER:
     case SPV_OPERAND_TYPE_CLDEBUG100_DEBUG_OPERATION:
-    case SPV_OPERAND_TYPE_CLDEBUG100_DEBUG_IMPORTED_ENTITY: {
+    case SPV_OPERAND_TYPE_CLDEBUG100_DEBUG_IMPORTED_ENTITY:
+    case SPV_OPERAND_TYPE_FPDENORM_MODE:
+    case SPV_OPERAND_TYPE_FPOPERATION_MODE: {
       spv_operand_desc entry;
       if (grammar_.lookupOperand(operand.type, word, &entry))
         assert(false && "should have caught this earlier");

source/operand.cpp

@@ -265,6 +265,11 @@ const char* spvOperandTypeStr(spv_operand_type_t type) {
     case SPV_OPERAND_TYPE_IMAGE_CHANNEL_DATA_TYPE:
       return "image channel data type";
 
+    case SPV_OPERAND_TYPE_FPDENORM_MODE:
+      return "FP denorm mode";
+    case SPV_OPERAND_TYPE_FPOPERATION_MODE:
+      return "FP operation mode";
+
     case SPV_OPERAND_TYPE_NONE:
       return "NONE";
     default:
@@ -348,6 +353,8 @@ bool spvOperandIsConcrete(spv_operand_type_t type) {
     case SPV_OPERAND_TYPE_CLDEBUG100_DEBUG_TYPE_QUALIFIER:
     case SPV_OPERAND_TYPE_CLDEBUG100_DEBUG_OPERATION:
     case SPV_OPERAND_TYPE_CLDEBUG100_DEBUG_IMPORTED_ENTITY:
+    case SPV_OPERAND_TYPE_FPDENORM_MODE:
+    case SPV_OPERAND_TYPE_FPOPERATION_MODE:
       return true;
     default:
       break;