diff -r 4ebc2e2fb97c -r 71c04702a3d5 src/hotspot/cpu/x86/c1_Defs_x86.hpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/cpu/x86/c1_Defs_x86.hpp	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef CPU_X86_VM_C1_DEFS_X86_HPP
+#define CPU_X86_VM_C1_DEFS_X86_HPP
+
+// native word offsets from memory address (little endian)
+enum {
+  pd_lo_word_offset_in_bytes = 0,
+  pd_hi_word_offset_in_bytes = BytesPerWord
+};
+
+// explicit rounding operations are required to implement the strictFP mode
+enum {
+  pd_strict_fp_requires_explicit_rounding = true
+};
+
+
+// registers
+enum {
+  pd_nof_cpu_regs_frame_map = RegisterImpl::number_of_registers,       // number of registers used during code emission
+  pd_nof_fpu_regs_frame_map = FloatRegisterImpl::number_of_registers,  // number of registers used during code emission
+  pd_nof_xmm_regs_frame_map = XMMRegisterImpl::number_of_registers,    // number of registers used during code emission
+
+#ifdef _LP64
+  #define UNALLOCATED 4    // rsp, rbp, r15, r10
+#else
+  #define UNALLOCATED 2    // rsp, rbp
+#endif // LP64
+
+  pd_nof_caller_save_cpu_regs_frame_map = pd_nof_cpu_regs_frame_map - UNALLOCATED,  // number of registers killed by calls
+  pd_nof_caller_save_fpu_regs_frame_map = pd_nof_fpu_regs_frame_map,  // number of registers killed by calls
+  pd_nof_caller_save_xmm_regs_frame_map = pd_nof_xmm_regs_frame_map,  // number of registers killed by calls
+
+  pd_nof_cpu_regs_reg_alloc = pd_nof_caller_save_cpu_regs_frame_map,  // number of registers that are visible to register allocator
+  pd_nof_fpu_regs_reg_alloc = 6,  // number of registers that are visible to register allocator
+
+  pd_nof_cpu_regs_linearscan = pd_nof_cpu_regs_frame_map, // number of registers visible to linear scan
+  pd_nof_fpu_regs_linearscan = pd_nof_fpu_regs_frame_map, // number of registers visible to linear scan
+  pd_nof_xmm_regs_linearscan = pd_nof_xmm_regs_frame_map, // number of registers visible to linear scan
+  pd_first_cpu_reg = 0,
+  pd_last_cpu_reg = NOT_LP64(5) LP64_ONLY(11),
+  pd_first_byte_reg = NOT_LP64(2) LP64_ONLY(0),
+  pd_last_byte_reg = NOT_LP64(5) LP64_ONLY(11),
+  pd_first_fpu_reg = pd_nof_cpu_regs_frame_map,
+  pd_last_fpu_reg =  pd_first_fpu_reg + 7,
+  pd_first_xmm_reg = pd_nof_cpu_regs_frame_map + pd_nof_fpu_regs_frame_map,
+  pd_last_xmm_reg =  pd_first_xmm_reg + pd_nof_xmm_regs_frame_map - 1
+};
+
+
+// encoding of float value in debug info:
+enum {
+  pd_float_saved_as_double = true
+};
+
+#endif // CPU_X86_VM_C1_DEFS_X86_HPP