; Options for the CRIS port of the compiler. ; Copyright (C) 2005-2022 Free Software Foundation, Inc. ; ; This file is part of GCC. ; ; GCC is free software; you can redistribute it and/or modify it under ; the terms of the GNU General Public License as published by the Free ; Software Foundation; either version 3, or (at your option) any later ; version. ; ; GCC 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 ; for more details. ; ; You should have received a copy of the GNU General Public License ; along with GCC; see the file COPYING3. If not see ; . ; TARGET_MUL_BUG: Whether or not to work around multiplication ; instruction hardware bug when generating code for models where ; it may be present. From the trouble report for Etrax 100 LX: ; "A multiply operation may cause incorrect cache behavior ; under some specific circumstances. The problem can occur if ; the instruction following the multiply instruction causes a ; cache miss, and multiply operand 1 (source operand) bits ; [31:27] matches the logical mapping of the mode register ; address (0xb0....), and bits [9:2] of operand 1 matches the ; TLB register address (0x258-0x25f). There is such a mapping ; in kernel mode or when the MMU is off. Normally there is no ; such mapping in user mode, and the problem will therefore ; probably not occur in Linux user mode programs." ; ; We have no sure-fire way to know from within GCC that we're ; compiling a user program. For example, -fpic/PIC is used in ; libgcc which is linked into the kernel. However, the ; workaround option -mno-mul-bug can be safely used per-package ; when compiling programs. The same goes for general user-only ; libraries such as glibc, since there's no user-space ; driver-like program that gets a mapping of I/O registers (all ; on the same page, including the TLB registers). mmul-bug-workaround Target Mask(MUL_BUG) Work around bug in multiplication instruction. ; TARGET_ETRAX4_ADD: Instruction-set additions from Etrax 4 and up. ; (Just "lz".) metrax4 Target Mask(ETRAX4_ADD) Compile for ETRAX 4 (CRIS v3). ; See cris_handle_option. metrax100 Target RejectNegative Compile for ETRAX 100 (CRIS v8). ; See cris_handle_option. mno-etrax100 Target RejectNegative Undocumented mpdebug Target Mask(PDEBUG) Emit verbose debug information in assembly code. ; TARGET_CCINIT: Whether to use condition-codes generated by ; insns other than the immediately preceding compare/test insn. ; Used to check for errors in notice_update_cc. mcc-init Target Mask(CCINIT) Do not use condition codes from normal instructions. ; TARGET_SIDE_EFFECT_PREFIXES: Whether to use side-effect ; patterns. Used to debug the [rx=ry+i] type patterns. mside-effects Target RejectNegative Mask(SIDE_EFFECT_PREFIXES) Undocumented mno-side-effects Target RejectNegative InverseMask(SIDE_EFFECT_PREFIXES) Do not emit addressing modes with side-effect assignment. ; TARGET_STACK_ALIGN: Whether to *keep* (not force) alignment of ; stack at 16 (or 32, depending on TARGET_ALIGN_BY_32) bits. mstack-align Target RejectNegative Mask(STACK_ALIGN) Undocumented mno-stack-align Target RejectNegative InverseMask(STACK_ALIGN) Do not tune stack alignment. ; TARGET_DATA_ALIGN: Whether to do alignment on individual ; modifiable objects. mdata-align Target RejectNegative Mask(DATA_ALIGN) Undocumented mno-data-align Target RejectNegative InverseMask(DATA_ALIGN) Do not tune writable data alignment. ; TARGET_CONST_ALIGN: Whether to do alignment on individual ; non-modifiable objects. mconst-align Target RejectNegative Mask(CONST_ALIGN) Undocumented mno-const-align Target RejectNegative InverseMask(CONST_ALIGN) Do not tune code and read-only data alignment. ; See cris_handle_option. m32-bit Target RejectNegative Undocumented ; See cris_handle_option. m32bit Target RejectNegative Align code and data to 32 bits. ; See cris_handle_option. m16-bit Target RejectNegative Undocumented ; See cris_handle_option. m16bit Target RejectNegative Undocumented ; See cris_handle_option. m8-bit Target RejectNegative Undocumented ; See cris_handle_option. m8bit Target RejectNegative Don't align items in code or data. ; TARGET_PROLOGUE_EPILOGUE: Whether or not to omit function ; prologue and epilogue. mprologue-epilogue Target RejectNegative Mask(PROLOGUE_EPILOGUE) Undocumented mno-prologue-epilogue Target RejectNegative InverseMask(PROLOGUE_EPILOGUE) Do not emit function prologue or epilogue. ; We have to handle this m-option here since we can't wash it ; off in both CC1_SPEC and CC1PLUS_SPEC. mbest-lib-options Target RejectNegative Use the most feature-enabling options allowed by other options. ; FIXME: The following comment relates to gcc before cris.opt. ; Check if it's still valid: ; We must call it "override-" since calling it "no-" will cause ; gcc.cc to forget it, if there's a "later" -mbest-lib-options. ; Kludgy, but needed for some multilibbed files. moverride-best-lib-options Target RejectNegative Override -mbest-lib-options. mcpu= Target RejectNegative Joined Undocumented Var(cris_cpu_str) march= Target RejectNegative Joined Var(cris_cpu_str) -march=ARCH Generate code for the specified chip or CPU version. mtune= Target RejectNegative Joined Var(cris_tune_str) -mtune=ARCH Tune alignment for the specified chip or CPU version. mmax-stackframe= Target RejectNegative Joined Var(cris_max_stackframe_str) -mmax-stackframe=SIZE Warn when a stackframe is larger than the specified size. max-stackframe= Target RejectNegative Joined Undocumented Var(cris_max_stackframe_str) mtrap-using-break8 Target Var(cris_trap_using_break8) Init(2) Emit traps as \"break 8\", default for CRIS v3 and up. If disabled, calls to abort() are used. mtrap-unaligned-atomic Target Var(cris_trap_unaligned_atomic) Init(2) Emit checks causing \"break 8\" instructions to execute when applying atomic builtins on misaligned memory. munaligned-atomic-may-use-library Target Var(cris_atomics_calling_libfunc) Init(2) Handle atomic builtins that may be applied to unaligned data by calling library functions. Overrides -mtrap-unaligned-atomic. ; TARGET_SVINTO: Currently this just affects alignment. FIXME: ; Redundant with TARGET_ALIGN_BY_32, or put machine stuff here? ; This and the others below could just as well be variables and ; TARGET_* defines in cris.h. Mask(SVINTO) ; TARGET_ALIGN_BY_32: Say that all alignment specifications say ; to prefer 32 rather than 16 bits. Mask(ALIGN_BY_32)