Speed up x86-64 validator by inlining heavily called routines. Speeds up

src/trusted/validator/x86/decoder/ncopcode_desc_inl.c

+/*
+ * Copyright (c) 2011 The Native Client Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/*
+ * ncopcode_desc_inl.c - Holds inline routines for commonly used (simple)
+ * functions in ncopcode_desc.h. Used to speed up code. Inlined routines
+ * correspond to the following functions in ncopcode_desc.h, but with
+ * an 'Inline' suffix:
+ *
+ *    NaClGetInstNumberOperands
+ *    NaClGetInstOperand
+ */
+#ifndef NATIVE_CLIENT_SRC_TRUSTED_VALIDATOR_X86_DECODER_NCOPCODE_DESC_INL_H_
+#define NATIVE_CLIENT_SRC_TRUSTED_VALIDATOR_X86_DECODER_NCOPCODE_DESC_INL_H_
+
+#include <assert.h>
+#include "native_client/src/trusted/validator/x86/decoder/ncopcode_desc.h"
+#include "native_client/src/trusted/validator/x86/decoder/nc_decode_tables.h"
+
+/* Returns the number of logical operands an instruction has. That is,
+ * returns field num_operands unless the first operand is
+ * a special encoding that extends the opcode.
+ */
+static uint8_t NaClGetInstNumberOperandsInline(const NaClInst* inst) {
+  return inst->num_operands;
+}
+
+/* Returns the indexed logical operand for the instruction. That is,
+ * returns the index-th operand unless the first operand is
+ * a special encoding that extends the opcode. In the latter
+ * case, the (index+1)-th operand is returned.
+ */
+static const INLINE NaClOp* NaClGetInstOperandInline(
+    const NaClDecodeTables* tables,
+    const NaClInst* inst, uint8_t index) {
+  assert(index < inst->num_operands);
+  return &tables->operands_table[inst->operands_offset + index];
+}
+
+#endif  /* NATIVE_CLIENT_SRC_TRUSTED_VALIDATOR_X86_DECODER_NCOPCODE_DESC_INL_H_ */