HIR: Add opcode SET_ROUNDING_MODE (taking FPSCR as an argument)

src/xenia/cpu/hir/hir_builder.cc

@@ -1269,6 +1269,12 @@ void HIRBuilder::Prefetch(Value* address, size_t length,
 
 void HIRBuilder::MemoryBarrier() { AppendInstr(OPCODE_MEMORY_BARRIER_info, 0); }
 
+void HIRBuilder::SetRoundingMode(Value* value) {
+  ASSERT_INTEGER_TYPE(value);
+  Instr* i = AppendInstr(OPCODE_SET_ROUNDING_MODE_info, 0);
+  i->set_src1(value);
+}
+
 Value* HIRBuilder::Max(Value* value1, Value* value2) {
   ASSERT_TYPES_EQUAL(value1, value2);
 

src/xenia/cpu/hir/hir_builder.h

@@ -153,6 +153,7 @@ class HIRBuilder {
   void Prefetch(Value* address, size_t length, uint32_t prefetch_flags = 0);
   void MemoryBarrier();
 
+  void SetRoundingMode(Value* value);
   Value* Max(Value* value1, Value* value2);
   Value* VectorMax(Value* value1, Value* value2, TypeName part_type,
                    uint32_t arithmetic_flags = 0);

src/xenia/cpu/hir/opcodes.h

@@ -225,6 +225,7 @@ enum Opcode {
   OPCODE_UNPACK,
   OPCODE_ATOMIC_EXCHANGE,
   OPCODE_ATOMIC_COMPARE_EXCHANGE,
+  OPCODE_SET_ROUNDING_MODE,
   __OPCODE_MAX_VALUE,  // Keep at end.
 };
 

src/xenia/cpu/hir/opcodes.inl

@@ -649,3 +649,9 @@ DEFINE_OPCODE(
     "atomic_compare_exchange",
     OPCODE_SIG_V_V_V_V,
     OPCODE_FLAG_VOLATILE)
+
+DEFINE_OPCODE(
+    OPCODE_SET_ROUNDING_MODE,
+    "set_rounding_mode",
+    OPCODE_SIG_X_V,
+    0)