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annotate gcc/config/arm/t-arm-elf @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
parents f6334be47118
children 84e7813d76e9
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1 # Copyright (C) 1998-2017 Free Software Foundation, Inc.
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2 #
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3 # This file is part of GCC.
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4 #
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5 # GCC is free software; you can redistribute it and/or modify
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6 # it under the terms of the GNU General Public License as published by
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7 # the Free Software Foundation; either version 3, or (at your option)
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8 # any later version.
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9 #
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10 # GCC is distributed in the hope that it will be useful,
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11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 # GNU General Public License for more details.
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14 #
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15 # You should have received a copy of the GNU General Public License
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16 # along with GCC; see the file COPYING3. If not see
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17 # <http://www.gnu.org/licenses/>.
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19 # Build a very basic set of libraries that should cater for most cases.
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20
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21 # Single-precision floating-point is NOT supported; we don't build a
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22 # suitable library for that. Use the rm-profile config in that case.
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23
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24 # PART 1 - Useful groups of options
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25
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26 dp_fpus := vfp vfpv2 vfpv3 vfpv3-fp16 vfpv3-d16 vfpv3-d16-fp16 \
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27 neon neon-vfpv3 neon-fp16 vfpv4 neon-vfpv4 vfpv4-d16 \
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28 fpv5-d16 fp-armv8 neon-fp-armv8 crypto-neon-fp-armv8 \
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29 vfp3
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30
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31 sp_fpus := vfpv3xd vfpv3xd-fp16 fpv4-sp-d16 fpv5-sp-d16
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32
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33 v7a_fps := vfpv3 vfpv3-fp16 vfpv4 simd neon-fp16 neon-vfpv4
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34 v7ve_fps := vfpv3-d16 vfpv3 vfpv3-d16-fp16 vfpv3-fp16 vfpv4 neon \
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35 neon-fp16 simd
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37 # Not all these permutations exist for all architecture variants, but
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38 # it seems to work ok.
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39 v8_fps := simd fp16 crypto fp16+crypto
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40
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41 # We don't do anything special with these. Pre-v4t probably doesn't work.
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42 all_early_nofp := armv2 armv2a armv3 armv3m armv4 armv4t armv5 armv5t
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43
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44 all_early_arch := armv5e armv5tej armv6 armv6j armv6k armv6z armv6kz \
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45 armv6zk armv6t2 iwmmxt iwmmxt2
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46
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47 all_v7_a_r := armv7-a armv7ve armv7-r
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48
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49 all_v8_archs := armv8-a armv8-a+crc armv8.1-a armv8.2-a
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50
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51 # No floating point variants, require thumb1 softfp
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52 all_nofp_t := armv6-m armv6s-m armv8-m.base
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53
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54 all_nofp_t2 := armv7-m
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55
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56 all_sp_only := armv7e-m armv8-m.main
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57
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58 MULTILIB_OPTIONS =
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59 MULTILIB_DIRNAMES =
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60 MULTILIB_EXCEPTIONS =
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61 MULTILIB_MATCHES =
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62 MULTILIB_REUSE =
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64 # PART 2 - multilib build rules
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65
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66 MULTILIB_OPTIONS += marm/mthumb
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67 MULTILIB_DIRNAMES += arm thumb
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68
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69 MULTILIB_OPTIONS += mfpu=auto
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70 MULTILIB_DIRNAMES += autofp
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71
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72 MULTILIB_OPTIONS += march=armv5te+fp/march=armv7+fp
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73 MULTILIB_DIRNAMES += v5te v7
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75 MULTILIB_OPTIONS += mfloat-abi=hard
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76 MULTILIB_DIRNAMES += fpu
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77
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78 # Build a total of 4 library variants (base options plus the following):
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79 MULTILIB_REQUIRED += mthumb
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80 MULTILIB_REQUIRED += marm/mfpu=auto/march=armv5te+fp/mfloat-abi=hard
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81 MULTILIB_REQUIRED += mthumb/mfpu=auto/march=armv7+fp/mfloat-abi=hard
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83 # PART 3 - Match rules
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84
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85 # Map all supported FPUs onto mfpu=auto
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86 MULTILIB_MATCHES += $(foreach FPU, $(dp_fpus), \
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87 mfpu?auto=mfpu?$(FPU))
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88
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89 MULTILIB_MATCHES += march?armv5te+fp=march?armv5te
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91 MULTILIB_MATCHES += $(foreach ARCH, $(all_early_arch), \
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92 march?armv5te+fp=march?$(ARCH) \
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93 march?armv5te+fp=march?$(ARCH)+fp)
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94
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95 MULTILIB_MATCHES += march?armv7+fp=march?armv7
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96
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97 MULTILIB_MATCHES += $(foreach FPARCH, $(v7a_fps), \
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98 march?armv7+fp=march?armv7-a+$(FPARCH))
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99
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100 MULTILIB_MATCHES += $(foreach FPARCH, $(v7ve_fps), \
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101 march?armv7+fp=march?armv7ve+$(FPARCH))
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102
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103 MULTILIB_MATCHES += $(foreach ARCH, $(all_v7_a_r), \
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104 march?armv7+fp=march?$(ARCH) \
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105 march?armv7+fp=march?$(ARCH)+fp)
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107 MULTILIB_MATCHES += $(foreach ARCH, $(all_v8_archs), \
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108 march?armv7+fp=march?$(ARCH) \
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109 $(foreach FPARCH, $(v8_fps), \
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110 march?armv7+fp=march?$(ARCH)+$(FPARCH)))
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112 MULTILIB_MATCHES += $(foreach ARCH, armv7e-m armv8-m.mainline, \
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113 march?armv7+fp=march?$(ARCH)+fp.dp)
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115 # PART 4 - Reuse rules
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116
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117 MULTILIB_REUSE += mthumb=mthumb/mfpu.auto
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118 MULTILIB_REUSE += mthumb=mthumb/mfpu.auto/march.armv5te+fp
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119 MULTILIB_REUSE += mthumb=mthumb/march.armv5te+fp
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120 MULTILIB_REUSE += marm/mfpu.auto/march.armv5te+fp/mfloat-abi.hard=marm/march.armv5te+fp/mfloat-abi.hard
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121 MULTILIB_REUSE += marm/mfpu.auto/march.armv5te+fp/mfloat-abi.hard=march.armv5te+fp/mfloat-abi.hard
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122 MULTILIB_REUSE += marm/mfpu.auto/march.armv5te+fp/mfloat-abi.hard=mfpu.auto/march.armv5te+fp/mfloat-abi.hard
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123 MULTILIB_REUSE += mthumb/mfpu.auto/march.armv7+fp/mfloat-abi.hard=mthumb/march.armv7+fp/mfloat-abi.hard
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124 MULTILIB_REUSE += mthumb/mfpu.auto/march.armv7+fp/mfloat-abi.hard=mfpu.auto/march.armv7+fp/mfloat-abi.hard
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125 MULTILIB_REUSE += mthumb/mfpu.auto/march.armv7+fp/mfloat-abi.hard=march.armv7+fp/mfloat-abi.hard