1 /* 2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2016 SAP SE. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #ifndef CPU_S390_VM_C1_DEFS_S390_HPP 27 #define CPU_S390_VM_C1_DEFS_S390_HPP 28 29 // Native word offsets from memory address (big endian). 30 enum { 31 pd_lo_word_offset_in_bytes = BytesPerInt, 32 pd_hi_word_offset_in_bytes = 0 33 }; 34 35 // Explicit rounding operations are not required to implement the strictFP mode. 36 enum { 37 pd_strict_fp_requires_explicit_rounding = false 38 }; 39 40 // registers 41 enum { 42 pd_nof_cpu_regs_frame_map = 16, // Number of registers used during code emission. 43 // Treat all registers as caller save (values of callee save are hard to find if caller is in runtime). 44 // unallocated: Z_thread, Z_fp, Z_SP, Z_R0_scratch, Z_R1_scratch, Z_R14 45 pd_nof_cpu_regs_unallocated = 6, 46 pd_nof_caller_save_cpu_regs_frame_map = pd_nof_cpu_regs_frame_map - pd_nof_cpu_regs_unallocated, // Number of cpu registers killed by calls. 47 pd_nof_cpu_regs_reg_alloc = pd_nof_caller_save_cpu_regs_frame_map, // Number of registers that are visible to register allocator. 48 pd_nof_cpu_regs_linearscan = pd_nof_cpu_regs_frame_map,// Number of registers visible linear scan. 49 pd_first_cpu_reg = 0, 50 pd_last_cpu_reg = 9, // Others are unallocated (see FrameMap::initialize()). 51 52 pd_nof_fpu_regs_frame_map = 16, // Number of registers used during code emission. 53 pd_nof_fcpu_regs_unallocated = 1, // Leave Z_F15 unallocated and use it as scratch register. 54 pd_nof_caller_save_fpu_regs_frame_map = pd_nof_fpu_regs_frame_map - pd_nof_fcpu_regs_unallocated, // Number of fpu registers killed by calls. 55 pd_nof_fpu_regs_reg_alloc = pd_nof_caller_save_fpu_regs_frame_map, // Number of registers that are visible to register allocator. 56 pd_nof_fpu_regs_linearscan = pd_nof_fpu_regs_frame_map, // Number of registers visible to linear scan. 57 pd_first_fpu_reg = pd_nof_cpu_regs_frame_map, 58 pd_last_fpu_reg = pd_first_fpu_reg + pd_nof_fpu_regs_frame_map - pd_nof_fcpu_regs_unallocated - 1, 59 60 pd_nof_xmm_regs_linearscan = 0, 61 pd_nof_caller_save_xmm_regs = 0, 62 pd_first_xmm_reg = -1, 63 pd_last_xmm_reg = -1 64 }; 65 66 // For debug info: a float value in a register is saved in single precision by runtime stubs. 67 enum { 68 pd_float_saved_as_double = false 69 }; 70 71 #endif // CPU_S390_VM_C1_DEFS_S390_HPP