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comparison gcc/config/csky/csky.opt @ 131:84e7813d76e9

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gcc-8.2
author mir3636
date Thu, 25 Oct 2018 07:37:49 +0900
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111:04ced10e8804 131:84e7813d76e9
1 ;; Command-line options for the C-SKY back end.
2 ;; Copyright (C) 2018 Free Software Foundation, Inc.
3 ;; Contributed by C-SKY Microsystems and Mentor Graphics.
4 ;;
5 ;; This file is part of GCC.
6 ;;
7 ;; GCC is free software; you can redistribute it and/or modify it under
8 ;; the terms of the GNU General Public License as published by the Free
9 ;; Software Foundation; either version 3, or (at your option) any later
10 ;; version.
11 ;;
12 ;; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 ;; WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 ;; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 ;; for more details.
16 ;;
17 ;; You should have received a copy of the GNU General Public License
18 ;; along with GCC; see the file COPYING3. If not see
19 ;; <http://www.gnu.org/licenses/>.
20
21
22 HeaderInclude
23 config/csky/csky_opts.h
24
25 ;; Architecture/CPU options.
26 ;; Normal CPU and arch enums are loaded from csky_tables.opt.
27
28 ; For backward compatibility only.
29 march=ck803s
30 Target Report Var(flag_arch_ck803s) Undocumented
31
32 march=
33 Target RejectNegative ToLower Joined Enum(csky_arch) Var(csky_arch_option) Save
34 Specify the target architecture.
35
36 mcpu=
37 Target RejectNegative ToLower Joined Enum(csky_processor_type) Var(csky_cpu_option) Init(TARGET_CPU_csky_none) Save
38 Specify the target processor.
39
40 ;; Endianness options.
41
42 mbig-endian
43 Target RejectNegative Report Mask(BIG_ENDIAN)
44 Generate big-endian code.
45
46 EB
47 Target RejectNegative Report Alias(mbig-endian) Undocumented
48
49 mlittle-endian
50 Target RejectNegative Report InverseMask(BIG_ENDIAN)
51 Generate little-endian code.
52
53 EL
54 Target RejectNegative Report Alias(mlittle-endian) Undocumented
55
56 ;; Floating point options. These affect code generation but not
57 ;; assembly.
58
59 mhard-float
60 Target Report RejectNegative Mask(HARD_FLOAT)
61 Enable hardware floating-point instructions.
62
63 msoft-float
64 Target Report RejectNegative InverseMask(HARD_FLOAT)
65 Use library calls to perform floating-point operations (default).
66
67 mfpu=
68 Target RejectNegative Joined Enum(csky_fpu) Var(csky_fpu_index) Init(TARGET_FPU_auto) Save
69 Specify the target floating-point hardware/format.
70
71 mdouble-float
72 Target Report Var(TARGET_DOUBLE_FLOAT) Init(-1)
73 Generate C-SKY FPU double float instructions (default for hard float).
74
75 mfdivdu
76 Target Report Var(TARGET_FDIVDU) Init(-1)
77 Generate frecipd/fsqrtd/fdivd instructions (default for hard float).
78
79 ;; Instruction set extensions. Most of these don't affect code
80 ;; generation, and are passed through to the assembler.
81 ;; There are builtin preprocessor defines for each of these.
82
83 melrw
84 Target Report Var(TARGET_ELRW) Init(-1)
85 Enable the extended LRW instruction (default for CK801).
86
87 mistack
88 Target Report Mask(ISTACK)
89 Enable interrupt stack instructions.
90
91 mmp
92 Target Report RejectNegative Mask(MP)
93 Enable multiprocessor instructions.
94
95 mcp
96 Target Report RejectNegative Mask(CP)
97 Enable coprocessor instructions.
98
99 mcache
100 Target Report RejectNegative Mask(CACHE)
101 Enable cache prefetch instructions.
102
103 msecurity
104 Target Report RejectNegative Mask(SECURITY)
105 Enable C-SKY SECURE instructions.
106
107 mmac
108 Target Report RejectNegative Alias(msecurity) Undocumented
109
110 mtrust
111 Target Report RejectNegative Mask(TRUST)
112 Enable C-SKY TRUST instructions.
113
114 mdsp
115 Target Report RejectNegative Var(TARGET_DSP)
116 Enable C-SKY DSP instructions.
117
118 medsp
119 Target Report RejectNegative Mask(EDSP)
120 Enable C-SKY Enhanced DSP instructions.
121
122 mvdsp
123 Target Report RejectNegative Mask(VDSP)
124 Enable C-SKY Vector DSP instructions.
125
126 ;; Code generation options not passed to the assembler.
127
128 mdiv
129 Target Report Var(TARGET_DIV) Init(-1)
130 Generate divide instructions.
131
132 msmart
133 Target Report Var(TARGET_MINI_REGISTERS) Init(-1)
134 Generate code for Smart Mode.
135
136 mhigh-registers
137 Target Report Var(TARGET_HIGH_REGISTERS) Init(-1)
138 Enable use of R16-R31 (default).
139
140 manchor
141 Target Report Var(TARGET_ANCHOR)
142 Generate code using global anchor symbol addresses.
143
144 mpushpop
145 Target Report Var(TARGET_PUSHPOP) Init(1)
146 Generate push/pop instructions (default).
147
148 mmultiple-stld
149 Target Report Var(TARGET_MULTIPLE_STLD) Init(-1)
150 Generate stm/ldm instructions (default).
151
152 mstm
153 Target Report Alias(mmultiple-stld) Undocumented
154
155 mconstpool
156 Target Report Var(TARGET_CONSTANT_POOL) Init(-1)
157 Generate constant pools in the compiler instead of assembler.
158
159 mstack-size
160 Target Report Var(TARGET_STACK_SIZE) Init(0)
161 Emit .stack_size directives.
162
163 mccrt
164 Target Report Var(TARGET_LIBCCRT) Init(0)
165 Generate code for C-SKY compiler runtime instead of libgcc.
166
167 mbranch-cost=
168 Target Report Joined RejectNegative UInteger Var(csky_branch_cost) Init(1)
169 Set the branch costs to roughly the specified number of instructions.
170
171 msched-prolog
172 Target Report Var(flag_sched_prolog) Init(0)
173 Permit scheduling of function prologue and epilogue sequences.