--- /dev/null 2018-09-25 19:24:17.000000000 +0300 +++ new/src/hotspot/cpu/aarch32/c1_Defs_aarch32.hpp 2018-09-25 19:24:17.000000000 +0300 @@ -0,0 +1,101 @@ +/* + * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2014, Red Hat Inc. All rights reserved. + * Copyright (c) 2015-2018, Azul Systems, Inc. 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_AARCH32_VM_C1_DEFS_AARCH32_HPP +#define CPU_AARCH32_VM_C1_DEFS_AARCH32_HPP + +// Native word offsets from memory address (little endian format) +enum { + pd_lo_word_offset_in_bytes = 0, + pd_hi_word_offset_in_bytes = BytesPerWord +}; + +// TODO: We should understand what values are correct for the following 3 flags +// relevant to floating point operations: +// - UseSSE +// Highest supported SSE instruction set on x86/x64. I believe we should +// set it to 0 in VM_Version::initialize(), like other non-x86 ports do. +// - RoundFPResults +// Indicates whether rounding is needed for floating point results +// - pd_strict_fp_requires_explicit_rounding +// The same as above but for the strictfp mode + +// Explicit rounding operations are not required to implement the strictfp mode +enum { + pd_strict_fp_requires_explicit_rounding = false +}; + +// Registers +enum { + // Number of registers used during code emission + pd_nof_cpu_regs_frame_map = RegisterImpl::number_of_registers, + pd_nof_fpu_regs_frame_map = FloatRegisterImpl::number_of_registers, + + // Number of registers killed by calls + pd_nof_caller_save_cpu_regs_frame_map = 9, + + pd_nof_caller_save_fpu_regs_frame_map = pd_nof_fpu_regs_frame_map, + // The following two constants need to be defined since they are referenced + // from c1_FrameMap.hpp, but actually they are never used, so can be set to + // arbitrary values. + pd_nof_cpu_regs_reg_alloc = -1, + pd_nof_fpu_regs_reg_alloc = -1, + + // All the constants below are used by linear scan register allocator only. + // Number of registers visible to register allocator + pd_nof_cpu_regs_linearscan = pd_nof_cpu_regs_frame_map, + pd_nof_fpu_regs_linearscan = pd_nof_fpu_regs_frame_map, + pd_nof_xmm_regs_linearscan = 0, + + // Register allocator specific register numbers corresponding to first/last + // CPU/FPU registers available for allocation + pd_first_cpu_reg = 0, + pd_last_cpu_reg = 8, + pd_first_fpu_reg = pd_nof_cpu_regs_frame_map, + pd_last_fpu_reg = pd_first_fpu_reg + pd_nof_fpu_regs_frame_map - 1, + // Register allocator specific register numbers corresponding to first/last + // CPU/FPU callee-saved registers. These constants are used in + // LinearScan::is_caller_save() only. + pd_first_callee_saved_cpu_reg = 4, + pd_last_callee_saved_cpu_reg = 11, + pd_first_callee_saved_fpu_reg = pd_first_fpu_reg + pd_nof_fpu_regs_frame_map/2, + pd_last_callee_saved_fpu_reg = pd_first_fpu_reg + pd_nof_fpu_regs_frame_map - 1 +}; + +// This flag must be in sync with how the floating point registers are stored +// on the stack by RegisterSaver::save_live_registers() method +// (sharedRuntime_aarch32.cpp) and save_live_registers() function +// (c1_Runtime1_aarch32.cpp). On AArch32 the floating point registers keep +// floats and doubles in their native form. No float to double conversion +// happens when the registers are stored on the stack. This is opposite to +// what happens on x86, where the FPU stack registers are 80 bits wide, +// and storing them in either 4 byte or 8 byte stack slot is a conversion +// operation. +enum { + pd_float_saved_as_double = false +}; + +#endif // CPU_AARCH32_VM_C1_DEFS_AARCH32_HPP