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;; Command-line options for the C-SKY back end.
;; Copyright (C) 2018-2019 Free Software Foundation, Inc.
;; Contributed by C-SKY Microsystems and Mentor Graphics.
;;
;; 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
;; <http://www.gnu.org/licenses/>.
HeaderInclude
config/csky/csky_opts.h
;; Architecture/CPU options.
;; Normal CPU and arch enums are loaded from csky_tables.opt.
; For backward compatibility only.
march=ck803s
Target Report Var(flag_arch_ck803s) Undocumented
march=
Target RejectNegative ToLower Joined Enum(csky_arch) Var(csky_arch_option) Save
Specify the target architecture.
mcpu=
Target RejectNegative ToLower Joined Enum(csky_processor_type) Var(csky_cpu_option) Init(TARGET_CPU_csky_none) Save
Specify the target processor.
;; Endianness options.
mbig-endian
Target RejectNegative Report Mask(BIG_ENDIAN)
Generate big-endian code.
EB
Target RejectNegative Report Alias(mbig-endian) Undocumented
mlittle-endian
Target RejectNegative Report InverseMask(BIG_ENDIAN)
Generate little-endian code.
EL
Target RejectNegative Report Alias(mlittle-endian) Undocumented
;; Floating point options. These affect code generation but not
;; assembly.
mhard-float
Target Report RejectNegative Mask(HARD_FLOAT)
Enable hardware floating-point instructions.
msoft-float
Target Report RejectNegative InverseMask(HARD_FLOAT)
Use library calls to perform floating-point operations (default).
mfpu=
Target RejectNegative Joined Enum(csky_fpu) Var(csky_fpu_index) Init(TARGET_FPU_auto) Save
Specify the target floating-point hardware/format.
mdouble-float
Target Report Var(TARGET_DOUBLE_FLOAT) Init(-1)
Generate C-SKY FPU double float instructions (default for hard float).
mfdivdu
Target Report Var(TARGET_FDIVDU) Init(-1)
Generate frecipd/fsqrtd/fdivd instructions (default for hard float).
;; Instruction set extensions. Most of these don't affect code
;; generation, and are passed through to the assembler.
;; There are builtin preprocessor defines for each of these.
melrw
Target Report Var(TARGET_ELRW) Init(-1)
Enable the extended LRW instruction (default for CK801).
mistack
Target Report Mask(ISTACK)
Enable interrupt stack instructions.
mmp
Target Report RejectNegative Mask(MP)
Enable multiprocessor instructions.
mcp
Target Report RejectNegative Mask(CP)
Enable coprocessor instructions.
mcache
Target Report RejectNegative Mask(CACHE)
Enable cache prefetch instructions.
msecurity
Target Report RejectNegative Mask(SECURITY)
Enable C-SKY SECURE instructions.
mmac
Target Report RejectNegative Alias(msecurity) Undocumented
mtrust
Target Report RejectNegative Mask(TRUST)
Enable C-SKY TRUST instructions.
mdsp
Target Report RejectNegative Var(TARGET_DSP)
Enable C-SKY DSP instructions.
medsp
Target Report RejectNegative Mask(EDSP)
Enable C-SKY Enhanced DSP instructions.
mvdsp
Target Report RejectNegative Mask(VDSP)
Enable C-SKY Vector DSP instructions.
;; Code generation options not passed to the assembler.
mdiv
Target Report Var(TARGET_DIV) Init(-1)
Generate divide instructions.
msmart
Target Report Var(TARGET_MINI_REGISTERS) Init(-1)
Generate code for Smart Mode.
mhigh-registers
Target Report Var(TARGET_HIGH_REGISTERS) Init(-1)
Enable use of R16-R31 (default).
manchor
Target Report Var(TARGET_ANCHOR)
Generate code using global anchor symbol addresses.
mpushpop
Target Report Var(TARGET_PUSHPOP) Init(1)
Generate push/pop instructions (default).
mmultiple-stld
Target Report Var(TARGET_MULTIPLE_STLD) Init(-1)
Generate stm/ldm instructions (default).
mstm
Target Report Alias(mmultiple-stld) Undocumented
mconstpool
Target Report Var(TARGET_CONSTANT_POOL) Init(-1)
Generate constant pools in the compiler instead of assembler.
mstack-size
Target Report Var(TARGET_STACK_SIZE) Init(0)
Emit .stack_size directives.
mccrt
Target Report Var(TARGET_LIBCCRT) Init(0)
Generate code for C-SKY compiler runtime instead of libgcc.
mbranch-cost=
Target Report Joined RejectNegative UInteger Var(csky_branch_cost) Init(1)
Set the branch costs to roughly the specified number of instructions.
msched-prolog
Target Report Var(flag_sched_prolog) Init(0)
Permit scheduling of function prologue and epilogue sequences.
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