gcc/config/or1k/or1k.opt

   1 ; OpenRISC command line options
   2
   3 ; Copyright (C) 2010-2020 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 ; See the GCC internals manual (options.texi) for a description of
  22 ; this file's format.
  23
  24 mhard-div
  25 Target RejectNegative InverseMask(SOFT_DIV)
  26 Enable generation of hardware divide (l.div, l.divu) instructions.  This is the
  27 default; use -msoft-div to override.
  28
  29 msoft-div
  30 Target RejectNegative Mask(SOFT_DIV)
  31 Enable generation of binaries which use functions from libgcc to perform divide
  32 operations.  The default is -mhard-div.
  33
  34 mhard-mul
  35 Target RejectNegative InverseMask(SOFT_MUL).
  36 Enable generation of hardware multiply instructions (l.mul, l.muli) instructions.
  37 This is the default; use -msoft-mul to override.
  38
  39 msoft-mul
  40 Target RejectNegative Mask(SOFT_MUL).
  41 Enable generation of binaries which use functions from libgcc to perform
  42 multiply operations. The default is -mhard-mul.
  43
  44 msoft-float
  45 Target RejectNegative InverseMask(HARD_FLOAT)
  46 Enable generation of binaries which use functions from libgcc to perform
  47 floating point operations.  This is the default; use -mhard-float to override.
  48
  49 mhard-float
  50 Target RejectNegative Mask(HARD_FLOAT)
  51 Enable generation of hardware floating point instructions. The default is
  52 -msoft-float.
  53
  54 mdouble-float
  55 Target Mask(DOUBLE_FLOAT)
  56 When -mhard-float is selected, enables generation of double-precision floating
  57 point instructions.  By default functions from libgcc are used to perform
  58 double-precision floating point operations.
  59
  60 munordered-float
  61 Target RejectNegative Mask(FP_UNORDERED)
  62 When -mhard-float is selected, enables generation of unordered floating point
  63 compare and set flag (lf.sfun*) instructions.  By default functions from libgcc
  64 are used to perform unordered floating point compare and set flag operations.
  65
  66 mcmov
  67 Target RejectNegative Mask(CMOV)
  68 Enable generation of conditional move (l.cmov) instructions.  By default the
  69 equivalent will be generated using set and branch.
  70
  71 mror
  72 Target RejectNegative Mask(ROR)
  73 Enable generation of rotate right (l.ror) instructions.  By default functions
  74 from libgcc are used to perform rotate right operations.
  75
  76 mrori
  77 Target RejectNegative Mask(RORI)
  78 Enable generation of rotate right with immediate (l.rori) instructions.  By
  79 default functions from libgcc are used to perform rotate right with immediate
  80 operations.
  81
  82 msext
  83 Target RejectNegative Mask(SEXT)
  84 Enable generation of sign extension (l.ext*) instructions.  By default memory
  85 loads are used to perform sign extension.
  86
  87 msfimm
  88 Target RejectNegative Mask(SFIMM)
  89 Enable generation of compare and set flag with immediate (l.sf*i) instructions.
  90 By default extra instructions will be generated to store the immediate to a
  91 register first.
  92
  93 mshftimm
  94 Target RejectNegative Mask(SHFTIMM)
  95 Enable generation of shift with immediate (l.srai, l.srli, l.slli) instructions.
  96 By default extra instructions will be generated to store the immediate to a
  97 register first.