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1 (* Auto-generate ARM Neon intrinsics tests.
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2 Copyright (C) 2006, 2007 Free Software Foundation, Inc.
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3 Contributed by CodeSourcery.
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4
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5 This file is part of GCC.
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6
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7 GCC is free software; you can redistribute it and/or modify it under
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8 the terms of the GNU General Public License as published by the Free
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9 Software Foundation; either version 3, or (at your option) any later
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10 version.
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11
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12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with GCC; see the file COPYING3. If not see
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19 <http://www.gnu.org/licenses/>.
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20
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21 This is an O'Caml program. The O'Caml compiler is available from:
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22
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23 http://caml.inria.fr/
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24
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25 Or from your favourite OS's friendly packaging system. Tested with version
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26 3.09.2, though other versions will probably work too.
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27
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28 Compile with:
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29 ocamlc -c neon.ml
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30 ocamlc -o neon-testgen neon.cmo neon-testgen.ml
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31
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32 Run with:
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33 cd /path/to/gcc/testsuite/gcc.target/arm/neon
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34 /path/to/neon-testgen
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35 *)
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36
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37 open Neon
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38
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39 type c_type_flags = Pointer | Const
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40
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41 (* Open a test source file. *)
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42 let open_test_file dir name =
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43 try
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44 open_out (dir ^ "/" ^ name ^ ".c")
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45 with Sys_error str ->
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46 failwith ("Could not create test source file " ^ name ^ ": " ^ str)
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47
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48 (* Emit prologue code to a test source file. *)
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49 let emit_prologue chan test_name =
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50 Printf.fprintf chan "/* Test the `%s' ARM Neon intrinsic. */\n" test_name;
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51 Printf.fprintf chan "/* This file was autogenerated by neon-testgen. */\n\n";
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52 Printf.fprintf chan "/* { dg-do assemble } */\n";
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53 Printf.fprintf chan "/* { dg-require-effective-target arm_neon_ok } */\n";
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54 Printf.fprintf chan
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55 "/* { dg-options \"-save-temps -O0 -mfpu=neon -mfloat-abi=softfp\" } */\n";
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56 Printf.fprintf chan "\n#include \"arm_neon.h\"\n\n";
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57 Printf.fprintf chan "void test_%s (void)\n{\n" test_name
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58
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59 (* Emit declarations of local variables that are going to be passed
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60 to an intrinsic, together with one to take a returned value if needed. *)
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61 let emit_automatics chan c_types =
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62 let emit () =
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63 ignore (
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64 List.fold_left (fun arg_number -> fun (flags, ty) ->
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65 let pointer_bit =
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66 if List.mem Pointer flags then "*" else ""
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67 in
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68 (* Const arguments to builtins are directly
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69 written in as constants. *)
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70 if not (List.mem Const flags) then
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71 Printf.fprintf chan " %s %sarg%d_%s;\n"
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72 ty pointer_bit arg_number ty;
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73 arg_number + 1)
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74 0 (List.tl c_types))
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75 in
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76 match c_types with
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77 (_, return_ty) :: tys ->
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78 if return_ty <> "void" then
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79 (* The intrinsic returns a value. *)
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80 (Printf.fprintf chan " %s out_%s;\n" return_ty return_ty;
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81 emit ())
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82 else
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83 (* The intrinsic does not return a value. *)
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84 emit ()
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85 | _ -> assert false
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86
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87 (* Emit code to call an intrinsic. *)
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88 let emit_call chan const_valuator c_types name elt_ty =
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89 (if snd (List.hd c_types) <> "void" then
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90 Printf.fprintf chan " out_%s = " (snd (List.hd c_types))
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91 else
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92 Printf.fprintf chan " ");
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93 Printf.fprintf chan "%s_%s (" (intrinsic_name name) (string_of_elt elt_ty);
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94 let print_arg chan arg_number (flags, ty) =
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95 (* If the argument is of const type, then directly write in the
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96 constant now. *)
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97 if List.mem Const flags then
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98 match const_valuator with
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99 None ->
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100 if List.mem Pointer flags then
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101 Printf.fprintf chan "0"
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102 else
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103 Printf.fprintf chan "1"
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104 | Some f -> Printf.fprintf chan "%s" (string_of_int (f arg_number))
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105 else
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106 Printf.fprintf chan "arg%d_%s" arg_number ty
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107 in
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108 let rec print_args arg_number tys =
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109 match tys with
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110 [] -> ()
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111 | [ty] -> print_arg chan arg_number ty
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112 | ty::tys ->
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113 print_arg chan arg_number ty;
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114 Printf.fprintf chan ", ";
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115 print_args (arg_number + 1) tys
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116 in
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117 print_args 0 (List.tl c_types);
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118 Printf.fprintf chan ");\n"
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119
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120 (* Emit epilogue code to a test source file. *)
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121 let emit_epilogue chan features regexps =
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122 let no_op = List.exists (fun feature -> feature = No_op) features in
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123 Printf.fprintf chan "}\n\n";
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124 (if not no_op then
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125 List.iter (fun regexp ->
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126 Printf.fprintf chan
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127 "/* { dg-final { scan-assembler \"%s\" } } */\n" regexp)
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128 regexps
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129 else
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130 ()
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131 );
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132 Printf.fprintf chan "/* { dg-final { cleanup-saved-temps } } */\n"
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133
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134 (* Check a list of C types to determine which ones are pointers and which
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135 ones are const. *)
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136 let check_types tys =
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137 let tys' =
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138 List.map (fun ty ->
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139 let len = String.length ty in
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140 if len > 2 && String.get ty (len - 2) = ' '
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141 && String.get ty (len - 1) = '*'
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142 then ([Pointer], String.sub ty 0 (len - 2))
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143 else ([], ty)) tys
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144 in
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145 List.map (fun (flags, ty) ->
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146 if String.length ty > 6 && String.sub ty 0 6 = "const "
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147 then (Const :: flags, String.sub ty 6 ((String.length ty) - 6))
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148 else (flags, ty)) tys'
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149
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150 (* Given an intrinsic shape, produce a regexp that will match
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151 the right-hand sides of instructions generated by an intrinsic of
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152 that shape. *)
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153 let rec analyze_shape shape =
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154 let rec n_things n thing =
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155 match n with
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156 0 -> []
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157 | n -> thing :: (n_things (n - 1) thing)
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158 in
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159 let rec analyze_shape_elt elt =
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160 match elt with
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161 Dreg -> "\\[dD\\]\\[0-9\\]+"
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162 | Qreg -> "\\[qQ\\]\\[0-9\\]+"
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163 | Corereg -> "\\[rR\\]\\[0-9\\]+"
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164 | Immed -> "#\\[0-9\\]+"
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165 | VecArray (1, elt) ->
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166 let elt_regexp = analyze_shape_elt elt in
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167 "((\\\\\\{" ^ elt_regexp ^ "\\\\\\})|(" ^ elt_regexp ^ "))"
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168 | VecArray (n, elt) ->
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169 let elt_regexp = analyze_shape_elt elt in
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170 let alt1 = elt_regexp ^ "-" ^ elt_regexp in
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171 let alt2 = commas (fun x -> x) (n_things n elt_regexp) "" in
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172 "\\\\\\{((" ^ alt1 ^ ")|(" ^ alt2 ^ "))\\\\\\}"
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173 | (PtrTo elt | CstPtrTo elt) ->
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174 "\\\\\\[" ^ (analyze_shape_elt elt) ^ "\\\\\\]"
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175 | Element_of_dreg -> (analyze_shape_elt Dreg) ^ "\\\\\\[\\[0-9\\]+\\\\\\]"
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176 | Element_of_qreg -> (analyze_shape_elt Qreg) ^ "\\\\\\[\\[0-9\\]+\\\\\\]"
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177 | All_elements_of_dreg -> (analyze_shape_elt Dreg) ^ "\\\\\\[\\\\\\]"
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178 in
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179 match shape with
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180 All (n, elt) -> commas analyze_shape_elt (n_things n elt) ""
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181 | Long -> (analyze_shape_elt Qreg) ^ ", " ^ (analyze_shape_elt Dreg) ^
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182 ", " ^ (analyze_shape_elt Dreg)
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183 | Long_noreg elt -> (analyze_shape_elt elt) ^ ", " ^ (analyze_shape_elt elt)
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184 | Wide -> (analyze_shape_elt Qreg) ^ ", " ^ (analyze_shape_elt Qreg) ^
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185 ", " ^ (analyze_shape_elt Dreg)
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186 | Wide_noreg elt -> analyze_shape (Long_noreg elt)
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187 | Narrow -> (analyze_shape_elt Dreg) ^ ", " ^ (analyze_shape_elt Qreg) ^
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188 ", " ^ (analyze_shape_elt Qreg)
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189 | Use_operands elts -> commas analyze_shape_elt (Array.to_list elts) ""
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190 | By_scalar Dreg ->
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191 analyze_shape (Use_operands [| Dreg; Dreg; Element_of_dreg |])
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192 | By_scalar Qreg ->
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193 analyze_shape (Use_operands [| Qreg; Qreg; Element_of_dreg |])
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194 | By_scalar _ -> assert false
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195 | Wide_lane ->
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196 analyze_shape (Use_operands [| Qreg; Dreg; Element_of_dreg |])
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197 | Wide_scalar ->
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198 analyze_shape (Use_operands [| Qreg; Dreg; Element_of_dreg |])
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199 | Pair_result elt ->
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200 let elt_regexp = analyze_shape_elt elt in
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201 elt_regexp ^ ", " ^ elt_regexp
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202 | Unary_scalar _ -> "FIXME Unary_scalar"
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203 | Binary_imm elt -> analyze_shape (Use_operands [| elt; elt; Immed |])
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204 | Narrow_imm -> analyze_shape (Use_operands [| Dreg; Qreg; Immed |])
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205 | Long_imm -> analyze_shape (Use_operands [| Qreg; Dreg; Immed |])
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206
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207 (* Generate tests for one intrinsic. *)
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208 let test_intrinsic dir opcode features shape name munge elt_ty =
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209 (* Open the test source file. *)
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210 let test_name = name ^ (string_of_elt elt_ty) in
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211 let chan = open_test_file dir test_name in
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212 (* Work out what argument and return types the intrinsic has. *)
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213 let c_arity, new_elt_ty = munge shape elt_ty in
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214 let c_types = check_types (strings_of_arity c_arity) in
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215 (* Extract any constant valuator (a function specifying what constant
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216 values are to be written into the intrinsic call) from the features
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217 list. *)
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218 let const_valuator =
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219 try
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220 match (List.find (fun feature -> match feature with
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221 Const_valuator _ -> true
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222 | _ -> false) features) with
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223 Const_valuator f -> Some f
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224 | _ -> assert false
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225 with Not_found -> None
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226 in
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227 (* Work out what instruction name(s) to expect. *)
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228 let insns = get_insn_names features name in
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229 let no_suffix = (new_elt_ty = NoElts) in
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230 let insns =
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231 if no_suffix then insns
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232 else List.map (fun insn ->
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233 let suffix = string_of_elt_dots new_elt_ty in
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234 insn ^ "\\." ^ suffix) insns
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235 in
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236 (* Construct a regexp to match against the expected instruction name(s). *)
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237 let insn_regexp =
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238 match insns with
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239 [] -> assert false
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240 | [insn] -> insn
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241 | _ ->
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242 let rec calc_regexp insns cur_regexp =
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243 match insns with
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244 [] -> cur_regexp
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245 | [insn] -> cur_regexp ^ "(" ^ insn ^ "))"
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246 | insn::insns -> calc_regexp insns (cur_regexp ^ "(" ^ insn ^ ")|")
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247 in calc_regexp insns "("
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248 in
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249 (* Construct regexps to match against the instructions that this
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250 intrinsic expands to. Watch out for any writeback character and
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251 comments after the instruction. *)
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252 let regexps = List.map (fun regexp -> insn_regexp ^ "\\[ \t\\]+" ^ regexp ^
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253 "!?\\(\\[ \t\\]+@\\[a-zA-Z0-9 \\]+\\)?\\n")
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254 (analyze_all_shapes features shape analyze_shape)
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255 in
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256 (* Emit file and function prologues. *)
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257 emit_prologue chan test_name;
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258 (* Emit local variable declarations. *)
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259 emit_automatics chan c_types;
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260 Printf.fprintf chan "\n";
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261 (* Emit the call to the intrinsic. *)
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262 emit_call chan const_valuator c_types name elt_ty;
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263 (* Emit the function epilogue and the DejaGNU scan-assembler directives. *)
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264 emit_epilogue chan features regexps;
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265 (* Close the test file. *)
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266 close_out chan
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267
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268 (* Generate tests for one element of the "ops" table. *)
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269 let test_intrinsic_group dir (opcode, features, shape, name, munge, types) =
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270 List.iter (test_intrinsic dir opcode features shape name munge) types
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271
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272 (* Program entry point. *)
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273 let _ =
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274 let directory = if Array.length Sys.argv <> 1 then Sys.argv.(1) else "." in
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275 List.iter (test_intrinsic_group directory) (reinterp @ ops)
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276
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