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comparison gcc/config/aarch64/aarch64.opt @ 131:84e7813d76e9

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gcc-8.2
author mir3636
date Thu, 25 Oct 2018 07:37:49 +0900
parents 04ced10e8804
children 1830386684a0
comparison
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111:04ced10e8804 131:84e7813d76e9
1 ; Machine description for AArch64 architecture. 1 ; Machine description for AArch64 architecture.
2 ; Copyright (C) 2009-2017 Free Software Foundation, Inc. 2 ; Copyright (C) 2009-2018 Free Software Foundation, Inc.
3 ; Contributed by ARM Ltd. 3 ; Contributed by ARM Ltd.
4 ; 4 ;
5 ; This file is part of GCC. 5 ; This file is part of GCC.
6 ; 6 ;
7 ; GCC is free software; you can redistribute it and/or modify it 7 ; GCC is free software; you can redistribute it and/or modify it
83 mcmodel= 83 mcmodel=
84 Target RejectNegative Joined Enum(cmodel) Var(aarch64_cmodel_var) Init(AARCH64_CMODEL_SMALL) Save 84 Target RejectNegative Joined Enum(cmodel) Var(aarch64_cmodel_var) Init(AARCH64_CMODEL_SMALL) Save
85 Specify the code model. 85 Specify the code model.
86 86
87 mstrict-align 87 mstrict-align
88 Target Report RejectNegative Mask(STRICT_ALIGN) Save 88 Target Report Mask(STRICT_ALIGN) Save
89 Don't assume that unaligned accesses are handled by the system. 89 Don't assume that unaligned accesses are handled by the system.
90 90
91 momit-leaf-frame-pointer 91 momit-leaf-frame-pointer
92 Target Report Var(flag_omit_leaf_frame_pointer) Init(2) Save 92 Target Report Var(flag_omit_leaf_frame_pointer) Init(2) Save
93 Omit the frame pointer in leaf functions. 93 Omit the frame pointer in leaf functions.
115 EnumValue 115 EnumValue
116 Enum(aarch64_tls_size) String(48) Value(48) 116 Enum(aarch64_tls_size) String(48) Value(48)
117 117
118 march= 118 march=
119 Target RejectNegative ToLower Joined Var(aarch64_arch_string) 119 Target RejectNegative ToLower Joined Var(aarch64_arch_string)
120 -march=ARCH Use features of architecture ARCH. 120 Use features of architecture ARCH.
121 121
122 mcpu= 122 mcpu=
123 Target RejectNegative ToLower Joined Var(aarch64_cpu_string) 123 Target RejectNegative ToLower Joined Var(aarch64_cpu_string)
124 -mcpu=CPU Use features of and optimize for CPU. 124 Use features of and optimize for CPU.
125 125
126 mtune= 126 mtune=
127 Target RejectNegative ToLower Joined Var(aarch64_tune_string) 127 Target RejectNegative ToLower Joined Var(aarch64_tune_string)
128 -mtune=CPU Optimize for CPU. 128 Optimize for CPU.
129 129
130 mabi= 130 mabi=
131 Target RejectNegative Joined Enum(aarch64_abi) Var(aarch64_abi) Init(AARCH64_ABI_DEFAULT) 131 Target RejectNegative Joined Enum(aarch64_abi) Var(aarch64_abi) Init(AARCH64_ABI_DEFAULT)
132 -mabi=ABI Generate code that conforms to the specified ABI. 132 Generate code that conforms to the specified ABI.
133 133
134 moverride= 134 moverride=
135 Target RejectNegative ToLower Joined Var(aarch64_override_tune_string) 135 Target RejectNegative ToLower Joined Var(aarch64_override_tune_string)
136 -moverride=STRING Power users only! Override CPU optimization parameters. 136 -moverride=<string> Power users only! Override CPU optimization parameters.
137 137
138 Enum 138 Enum
139 Name(aarch64_abi) Type(int) 139 Name(aarch64_abi) Type(int)
140 Known AArch64 ABIs (for use with the -mabi= option): 140 Known AArch64 ABIs (for use with the -mabi= option):
141 141
165 165
166 EnumValue 166 EnumValue
167 Enum(aarch64_ra_sign_scope_t) String(all) Value(AARCH64_FUNCTION_ALL) 167 Enum(aarch64_ra_sign_scope_t) String(all) Value(AARCH64_FUNCTION_ALL)
168 168
169 mlow-precision-recip-sqrt 169 mlow-precision-recip-sqrt
170 Common Var(flag_mrecip_low_precision_sqrt) Optimization 170 Target Var(flag_mrecip_low_precision_sqrt) Optimization
171 Enable the reciprocal square root approximation. Enabling this reduces 171 Enable the reciprocal square root approximation. Enabling this reduces
172 precision of reciprocal square root results to about 16 bits for 172 precision of reciprocal square root results to about 16 bits for
173 single precision and to 32 bits for double precision. 173 single precision and to 32 bits for double precision.
174 174
175 mlow-precision-sqrt 175 mlow-precision-sqrt
176 Common Var(flag_mlow_precision_sqrt) Optimization 176 Target Var(flag_mlow_precision_sqrt) Optimization
177 Enable the square root approximation. Enabling this reduces 177 Enable the square root approximation. Enabling this reduces
178 precision of square root results to about 16 bits for 178 precision of square root results to about 16 bits for
179 single precision and to 32 bits for double precision. 179 single precision and to 32 bits for double precision.
180 If enabled, it implies -mlow-precision-recip-sqrt. 180 If enabled, it implies -mlow-precision-recip-sqrt.
181 181
182 mlow-precision-div 182 mlow-precision-div
183 Common Var(flag_mlow_precision_div) Optimization 183 Target Var(flag_mlow_precision_div) Optimization
184 Enable the division approximation. Enabling this reduces 184 Enable the division approximation. Enabling this reduces
185 precision of division results to about 16 bits for 185 precision of division results to about 16 bits for
186 single precision and to 32 bits for double precision. 186 single precision and to 32 bits for double precision.
187 187
188 Enum
189 Name(sve_vector_bits) Type(enum aarch64_sve_vector_bits_enum)
190 The possible SVE vector lengths:
191
192 EnumValue
193 Enum(sve_vector_bits) String(scalable) Value(SVE_SCALABLE)
194
195 EnumValue
196 Enum(sve_vector_bits) String(128) Value(SVE_128)
197
198 EnumValue
199 Enum(sve_vector_bits) String(256) Value(SVE_256)
200
201 EnumValue
202 Enum(sve_vector_bits) String(512) Value(SVE_512)
203
204 EnumValue
205 Enum(sve_vector_bits) String(1024) Value(SVE_1024)
206
207 EnumValue
208 Enum(sve_vector_bits) String(2048) Value(SVE_2048)
209
210 msve-vector-bits=
211 Target RejectNegative Joined Enum(sve_vector_bits) Var(aarch64_sve_vector_bits) Init(SVE_SCALABLE)
212 -msve-vector-bits=<number> Set the number of bits in an SVE vector register to N.
213
188 mverbose-cost-dump 214 mverbose-cost-dump
189 Common Undocumented Var(flag_aarch64_verbose_cost) 215 Target Undocumented Var(flag_aarch64_verbose_cost)
190 Enables verbose cost model dumping in the debug dump files. 216 Enables verbose cost model dumping in the debug dump files.
217
218 mtrack-speculation
219 Target Var(aarch64_track_speculation)
220 Generate code to track when the CPU might be speculating incorrectly.