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annotate dmd2/builtin.c @ 1138:4c8bb03e4fbc

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Update DtoConstFP() to be correct after LLVM r67562, which changed the way the APFloat constructor expects its i80 APInts to be formatted. (They're now actually consistent with the x87 format)
author Frits van Bommel <fvbommel wxs.nl>
date Tue, 24 Mar 2009 15:24:59 +0100
parents f04dde6e882c
children 638d16625da2
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758
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1
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2 // Compiler implementation of the D programming language
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3 // Copyright (c) 1999-2007 by Digital Mars
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4 // All Rights Reserved
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5 // written by Walter Bright
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6 // http://www.digitalmars.com
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7 // License for redistribution is by either the Artistic License
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8 // in artistic.txt, or the GNU General Public License in gnu.txt.
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9 // See the included readme.txt for details.
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10
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11 #include <stdio.h>
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12 #include <assert.h>
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13 #include <math.h>
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15 #include "mars.h"
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16 #include "declaration.h"
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17 #include "attrib.h"
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18 #include "expression.h"
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19 #include "scope.h"
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20 #include "mtype.h"
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21 #include "aggregate.h"
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22 #include "identifier.h"
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23 #include "id.h"
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24 #include "module.h"
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25
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26 /**********************************
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27 * Determine if function is a builtin one.
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28 */
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29 enum BUILTIN FuncDeclaration::isBuiltin()
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30 {
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31 static const char FeZe[] = "FeZe"; // real function(real)
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32
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33 //printf("FuncDeclaration::isBuiltin() %s\n", toChars());
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34 if (builtin == BUILTINunknown)
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35 {
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36 builtin = BUILTINnot;
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37 if (parent && parent->isModule())
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38 {
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39 if (parent->ident == Id::math &&
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40 parent->parent && parent->parent->ident == Id::std &&
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41 !parent->parent->parent)
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42 {
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43 if (strcmp(type->deco, FeZe) == 0)
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44 {
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45 if (ident == Id::sin)
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46 builtin = BUILTINsin;
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47 else if (ident == Id::cos)
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48 builtin = BUILTINcos;
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49 else if (ident == Id::tan)
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50 builtin = BUILTINtan;
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51 else if (ident == Id::_sqrt)
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52 builtin = BUILTINsqrt;
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53 else if (ident == Id::fabs)
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54 builtin = BUILTINfabs;
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55 //printf("builtin = %d\n", builtin);
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56 }
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57 }
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58 }
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59 }
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60 return builtin;
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61 }
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62
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63
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64 /**************************************
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65 * Evaluate builtin function.
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66 * Return result; NULL if cannot evaluate it.
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67 */
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68
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69 Expression *eval_builtin(enum BUILTIN builtin, Expressions *arguments)
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70 {
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71 assert(arguments && arguments->dim);
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72 Expression *arg0 = (Expression *)arguments->data[0];
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73 Expression *e = NULL;
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74 switch (builtin)
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75 {
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76 case BUILTINsin:
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77 if (arg0->op == TOKfloat64)
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78 e = new RealExp(0, sinl(arg0->toReal()), Type::tfloat80);
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79 break;
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80
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81 case BUILTINcos:
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82 if (arg0->op == TOKfloat64)
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83 e = new RealExp(0, cosl(arg0->toReal()), Type::tfloat80);
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84 break;
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85
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86 case BUILTINtan:
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87 if (arg0->op == TOKfloat64)
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88 e = new RealExp(0, tanl(arg0->toReal()), Type::tfloat80);
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89 break;
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90
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91 case BUILTINsqrt:
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92 if (arg0->op == TOKfloat64)
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93 e = new RealExp(0, sqrtl(arg0->toReal()), Type::tfloat80);
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94 break;
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95
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96 case BUILTINfabs:
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97 if (arg0->op == TOKfloat64)
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98 e = new RealExp(0, fabsl(arg0->toReal()), Type::tfloat80);
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99 break;
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100 }
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101 return e;
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102 }