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[thirdparty/gcc.git] / gcc / config / or1k / or1k.opt

; OpenRISC command line options

; Copyright (C) 2010-2020 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
; <http://www.gnu.org/licenses/>.

; See the GCC internals manual (options.texi) for a description of
; this file's format.

mhard-div
Target RejectNegative InverseMask(SOFT_DIV)
Enable generation of hardware divide (l.div, l.divu) instructions.  This is the
default; use -msoft-div to override.

msoft-div
Target RejectNegative Mask(SOFT_DIV)
Enable generation of binaries which use functions from libgcc to perform divide
operations.  The default is -mhard-div.

mhard-mul
Target RejectNegative InverseMask(SOFT_MUL).
Enable generation of hardware multiply instructions (l.mul, l.muli) instructions.
This is the default; use -msoft-mul to override.

msoft-mul
Target RejectNegative Mask(SOFT_MUL).
Enable generation of binaries which use functions from libgcc to perform
multiply operations. The default is -mhard-mul.

msoft-float
Target RejectNegative InverseMask(HARD_FLOAT)
Enable generation of binaries which use functions from libgcc to perform
floating point operations.  This is the default; use -mhard-float to override.

mhard-float
Target RejectNegative Mask(HARD_FLOAT)
Enable generation of hardware floating point instructions. The default is
-msoft-float.

mdouble-float
Target Mask(DOUBLE_FLOAT)
When -mhard-float is selected, enables generation of double-precision floating
point instructions.  By default functions from libgcc are used to perform
double-precision floating point operations.

munordered-float
Target RejectNegative Mask(FP_UNORDERED)
When -mhard-float is selected, enables generation of unordered floating point
compare and set flag (lf.sfun*) instructions.  By default functions from libgcc
are used to perform unordered floating point compare and set flag operations.

mcmov
Target RejectNegative Mask(CMOV)
Enable generation of conditional move (l.cmov) instructions.  By default the
equivalent will be generated using using set and branch.

mror
Target RejectNegative Mask(ROR)
Enable generation of rotate right (l.ror) instructions.  By default functions
from libgcc are used to perform rotate right operations.

mrori
Target RejectNegative Mask(RORI)
Enable generation of rotate right with immediate (l.rori) instructions.  By
default functions from libgcc are used to perform rotate right with immediate
operations.

msext
Target RejectNegative Mask(SEXT)
Enable generation of sign extension (l.ext*) instructions.  By default memory
loads are used to perform sign extension.

msfimm
Target RejectNegative Mask(SFIMM)
Enable generation of compare and set flag with immediate (l.sf*i) instructions.
By default extra instructions will be generated to store the immediate to a
register first.

mshftimm
Target RejectNegative Mask(SHFTIMM)
Enable generation of shift with immediate (l.srai, l.srli, l.slli) instructions.
By default extra instructions will be generated to store the immediate to a
register first.