1 ; Options for the CRIS port of the compiler. 2 3 ; Copyright (C) 2005-2022 Free Software Foundation, Inc. 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 ; TARGET_MUL_BUG: Whether or not to work around multiplication 22 ; instruction hardware bug when generating code for models where 23 ; it may be present. From the trouble report for Etrax 100 LX: 24 ; "A multiply operation may cause incorrect cache behavior 25 ; under some specific circumstances. The problem can occur if 26 ; the instruction following the multiply instruction causes a 27 ; cache miss, and multiply operand 1 (source operand) bits 28 ; [31:27] matches the logical mapping of the mode register 29 ; address (0xb0....), and bits [9:2] of operand 1 matches the 30 ; TLB register address (0x258-0x25f). There is such a mapping 31 ; in kernel mode or when the MMU is off. Normally there is no 32 ; such mapping in user mode, and the problem will therefore 33 ; probably not occur in Linux user mode programs." 34 ; 35 ; We have no sure-fire way to know from within GCC that we're 36 ; compiling a user program. For example, -fpic/PIC is used in 37 ; libgcc which is linked into the kernel. However, the 38 ; workaround option -mno-mul-bug can be safely used per-package 39 ; when compiling programs. The same goes for general user-only 40 ; libraries such as glibc, since there's no user-space 41 ; driver-like program that gets a mapping of I/O registers (all 42 ; on the same page, including the TLB registers). 43 mmul-bug-workaround 44 Target Mask(MUL_BUG) 45 Work around bug in multiplication instruction. 46 47 ; TARGET_ETRAX4_ADD: Instruction-set additions from Etrax 4 and up. 48 ; (Just "lz".) 49 metrax4 50 Target Mask(ETRAX4_ADD) 51 Compile for ETRAX 4 (CRIS v3). 52 53 ; See cris_handle_option. 54 metrax100 55 Target RejectNegative 56 Compile for ETRAX 100 (CRIS v8). 57 58 ; See cris_handle_option. 59 mno-etrax100 60 Target RejectNegative Undocumented 61 62 mpdebug 63 Target Mask(PDEBUG) 64 Emit verbose debug information in assembly code. 65 66 ; TARGET_CCINIT: Whether to use condition-codes generated by 67 ; insns other than the immediately preceding compare/test insn. 68 ; Used to check for errors in notice_update_cc. 69 mcc-init 70 Target Mask(CCINIT) 71 Do not use condition codes from normal instructions. 72 73 ; TARGET_SIDE_EFFECT_PREFIXES: Whether to use side-effect 74 ; patterns. Used to debug the [rx=ry+i] type patterns. 75 mside-effects 76 Target RejectNegative Mask(SIDE_EFFECT_PREFIXES) Undocumented 77 78 mno-side-effects 79 Target RejectNegative InverseMask(SIDE_EFFECT_PREFIXES) 80 Do not emit addressing modes with side-effect assignment. 81 82 ; TARGET_STACK_ALIGN: Whether to *keep* (not force) alignment of 83 ; stack at 16 (or 32, depending on TARGET_ALIGN_BY_32) bits. 84 mstack-align 85 Target RejectNegative Mask(STACK_ALIGN) Undocumented 86 87 mno-stack-align 88 Target RejectNegative InverseMask(STACK_ALIGN) 89 Do not tune stack alignment. 90 91 ; TARGET_DATA_ALIGN: Whether to do alignment on individual 92 ; modifiable objects. 93 mdata-align 94 Target RejectNegative Mask(DATA_ALIGN) Undocumented 95 96 mno-data-align 97 Target RejectNegative InverseMask(DATA_ALIGN) 98 Do not tune writable data alignment. 99 100 ; TARGET_CONST_ALIGN: Whether to do alignment on individual 101 ; non-modifiable objects. 102 mconst-align 103 Target RejectNegative Mask(CONST_ALIGN) Undocumented 104 105 mno-const-align 106 Target RejectNegative InverseMask(CONST_ALIGN) 107 Do not tune code and read-only data alignment. 108 109 ; See cris_handle_option. 110 m32-bit 111 Target RejectNegative Undocumented 112 113 ; See cris_handle_option. 114 m32bit 115 Target RejectNegative 116 Align code and data to 32 bits. 117 118 ; See cris_handle_option. 119 m16-bit 120 Target RejectNegative Undocumented 121 122 ; See cris_handle_option. 123 m16bit 124 Target RejectNegative Undocumented 125 126 ; See cris_handle_option. 127 m8-bit 128 Target RejectNegative Undocumented 129 130 ; See cris_handle_option. 131 m8bit 132 Target RejectNegative 133 Don't align items in code or data. 134 135 ; TARGET_PROLOGUE_EPILOGUE: Whether or not to omit function 136 ; prologue and epilogue. 137 mprologue-epilogue 138 Target RejectNegative Mask(PROLOGUE_EPILOGUE) Undocumented 139 140 mno-prologue-epilogue 141 Target RejectNegative InverseMask(PROLOGUE_EPILOGUE) 142 Do not emit function prologue or epilogue. 143 144 ; We have to handle this m-option here since we can't wash it 145 ; off in both CC1_SPEC and CC1PLUS_SPEC. 146 147 mbest-lib-options 148 Target RejectNegative 149 Use the most feature-enabling options allowed by other options. 150 151 ; FIXME: The following comment relates to gcc before cris.opt. 152 ; Check if it's still valid: 153 ; We must call it "override-" since calling it "no-" will cause 154 ; gcc.cc to forget it, if there's a "later" -mbest-lib-options. 155 ; Kludgy, but needed for some multilibbed files. 156 moverride-best-lib-options 157 Target RejectNegative 158 Override -mbest-lib-options. 159 160 mcpu= 161 Target RejectNegative Joined Undocumented Var(cris_cpu_str) 162 163 march= 164 Target RejectNegative Joined Var(cris_cpu_str) 165 -march=ARCH Generate code for the specified chip or CPU version. 166 167 mtune= 168 Target RejectNegative Joined Var(cris_tune_str) 169 -mtune=ARCH Tune alignment for the specified chip or CPU version. 170 171 mmax-stackframe= 172 Target RejectNegative Joined Var(cris_max_stackframe_str) 173 -mmax-stackframe=SIZE Warn when a stackframe is larger than the specified size. 174 175 max-stackframe= 176 Target RejectNegative Joined Undocumented Var(cris_max_stackframe_str) 177 178 mtrap-using-break8 179 Target Var(cris_trap_using_break8) Init(2) 180 Emit traps as \"break 8\", default for CRIS v3 and up. If disabled, calls to abort() are used. 181 182 mtrap-unaligned-atomic 183 Target Var(cris_trap_unaligned_atomic) Init(2) 184 Emit checks causing \"break 8\" instructions to execute when applying atomic builtins on misaligned memory. 185 186 munaligned-atomic-may-use-library 187 Target Var(cris_atomics_calling_libfunc) Init(2) 188 Handle atomic builtins that may be applied to unaligned data by calling library functions. Overrides -mtrap-unaligned-atomic. 189 190 ; TARGET_SVINTO: Currently this just affects alignment. FIXME: 191 ; Redundant with TARGET_ALIGN_BY_32, or put machine stuff here? 192 ; This and the others below could just as well be variables and 193 ; TARGET_* defines in cris.h. 194 Mask(SVINTO) 195 196 ; TARGET_ALIGN_BY_32: Say that all alignment specifications say 197 ; to prefer 32 rather than 16 bits. 198 Mask(ALIGN_BY_32) 199
Indexes created Sat Feb 28 05:31:39 UTC 2026