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annotate druntime/src/compiler/dmd/llmath.d @ 759:d3eb054172f9

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Added copy of druntime from DMD 2.020 modified for LDC.
author Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
date Tue, 11 Nov 2008 01:52:37 +0100
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759
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
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1 // llmath.d
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2 // Copyright (C) 1993-2003 by Digital Mars, www.digitalmars.com
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3 // All Rights Reserved
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4 // Written by Walter Bright
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5
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6 module rt.llmath;
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7
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8 // Compiler runtime support for 64 bit longs
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9
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
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10 extern (C):
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11
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
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12
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
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13 /***************************************
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
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14 * Unsigned long divide.
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
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15 * Input:
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
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16 * [EDX,EAX],[ECX,EBX]
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
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17 * Output:
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
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18 * [EDX,EAX] = [EDX,EAX] / [ECX,EBX]
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
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19 * [ECX,EBX] = [EDX,EAX] % [ECX,EBX]
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
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20 * ESI,EDI destroyed
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21 */
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22
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23 void __ULDIV__()
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24 {
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25 asm
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26 {
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27 naked ;
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28 test ECX,ECX ;
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29 jz uldiv ;
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30
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
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31 push EBP ;
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32
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33 // left justify [ECX,EBX] and leave count of shifts + 1 in EBP
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34
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35 mov EBP,1 ; // at least 1 shift
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36 test ECX,ECX ; // left justified?
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37 js L1 ; // yes
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38 jnz L2 ;
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39 add EBP,8 ;
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40 mov CH,CL ;
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41 mov CL,BH ;
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42 mov BH,BL ;
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43 xor BL,BL ; // [ECX,EBX] <<= 8
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44 test ECX,ECX ;
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45 js L1 ;
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46 even ;
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47 L2: inc EBP ; // another shift
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48 shl EBX,1 ;
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49 rcl ECX,1 ; // [ECX,EBX] <<= 1
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50 jno L2 ; // not left justified yet
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51
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52 L1: mov ESI,ECX ;
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53 mov EDI,EBX ; // [ESI,EDI] = divisor
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54
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55 mov ECX,EDX ;
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56 mov EBX,EAX ; // [ECX,EBX] = [EDX,EAX]
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57 xor EAX,EAX ;
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58 cdq ; // [EDX,EAX] = 0
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59 even ;
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60 L4: cmp ESI,ECX ; // is [ECX,EBX] > [ESI,EDI]?
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61 ja L3 ; // yes
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62 jb L5 ; // definitely less than
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63 cmp EDI,EBX ; // check low order word
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64 ja L3 ;
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65 L5: sub EBX,EDI ;
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66 sbb ECX,ESI ; // [ECX,EBX] -= [ESI,EDI]
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67 stc ; // rotate in a 1
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68 L3: rcl EAX,1 ;
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69 rcl EDX,1 ; // [EDX,EAX] = ([EDX,EAX] << 1) + C
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70 shr ESI,1 ;
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71 rcr EDI,1 ; // [ESI,EDI] >>= 1
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72 dec EBP ; // control count
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73 jne L4 ;
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74 pop EBP ;
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75 ret ;
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76
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77 div0: mov EAX,-1 ;
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78 cwd ; // quotient is -1
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79 // xor ECX,ECX ;
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80 // mov EBX,ECX ; // remainder is 0 (ECX and EBX already 0)
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81 pop EBP ;
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82 ret ;
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83
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84 uldiv: test EDX,EDX ;
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85 jnz D3 ;
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86 // Both high words are 0, we can use the DIV instruction
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87 div EBX ;
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88 mov EBX,EDX ;
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89 mov EDX,ECX ; // EDX = ECX = 0
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90 ret ;
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91
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92 even ;
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93 D3: // Divide [EDX,EAX] by EBX
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94 mov ECX,EAX ;
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95 mov EAX,EDX ;
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96 xor EDX,EDX ;
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97 div EBX ;
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98 xchg ECX,EAX ;
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99 div EBX ;
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100 // ECX,EAX = result
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101 // EDX = remainder
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102 mov EBX,EDX ;
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103 mov EDX,ECX ;
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104 xor ECX,ECX ;
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105 ret ;
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106 }
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107 }
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108
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109
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110 /***************************************
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111 * Signed long divide.
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112 * Input:
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113 * [EDX,EAX],[ECX,EBX]
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114 * Output:
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115 * [EDX,EAX] = [EDX,EAX] / [ECX,EBX]
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116 * [ECX,EBX] = [EDX,EAX] % [ECX,EBX]
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117 * ESI,EDI destroyed
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118 */
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119
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120 void __LDIV__()
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121 {
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122 asm
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123 {
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
124 naked ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
125 test EDX,EDX ; // [EDX,EAX] negative?
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
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parents:
diff changeset
126 jns L10 ; // no
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
127 //neg64 EDX,EAX ; // [EDX,EAX] = -[EDX,EAX]
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
128 neg EDX ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
129 neg EAX ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
130 sbb EDX,0 ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
131 test ECX,ECX ; // [ECX,EBX] negative?
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parents:
diff changeset
132 jns L11 ; // no
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
133 //neg64 ECX,EBX ;
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
134 neg ECX ;
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
135 neg EBX ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
136 sbb ECX,0 ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
137 call __ULDIV__ ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
138 //neg64 ECX,EBX ; // remainder same sign as dividend
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
139 neg ECX ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
140 neg EBX ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
141 sbb ECX,0 ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
142 ret ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
143
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
144 L11: call __ULDIV__ ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
145 //neg64 ECX,EBX ; // remainder same sign as dividend
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
146 neg ECX ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
147 neg EBX ;
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
148 sbb ECX,0 ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
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parents:
diff changeset
149 //neg64 EDX,EAX ; // quotient is negative
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
150 neg EDX ;
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
151 neg EAX ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
152 sbb EDX,0 ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
153 ret ;
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
154
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
155 L10: test ECX,ECX ; // [ECX,EBX] negative?
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
156 jns L12 ; // no (all is positive)
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
157 //neg64 ECX,EBX ;
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
158 neg ECX ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
159 neg EBX ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
160 sbb ECX,0 ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
161 call __ULDIV__ ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
162 //neg64 EDX,EAX ; // quotient is negative
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
163 neg EDX ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
164 neg EAX ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
165 sbb EDX,0 ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
166 ret ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
167
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
168 L12: jmp __ULDIV__ ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
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169 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
170 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
171
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
172
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
173 /***************************************
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
174 * Compare [EDX,EAX] with [ECX,EBX]
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
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175 * Signed
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
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176 * Returns result in flags
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
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177 */
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178
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
179 void __LCMP__()
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180 {
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parents:
diff changeset
181 asm
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
182 {
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
183 naked ;
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
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184 cmp EDX,ECX ;
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185 jne C1 ;
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
186 push EDX ;
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
187 xor EDX,EDX ;
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parents:
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188 cmp EAX,EBX ;
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
189 jz C2 ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
190 ja C3 ;
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
191 dec EDX ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
192 pop EDX ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
193 ret ;
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
194
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parents:
diff changeset
195 C3: inc EDX ;
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parents:
diff changeset
196 C2: pop EDX ;
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parents:
diff changeset
197 C1: ret ;
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
198 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
199 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
200
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
201
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
202
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
203
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
204 // Convert ulong to real
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
205
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
206 private real adjust = cast(real)0x800_0000_0000_0000 * 0x10;
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parents:
diff changeset
207
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
208 real __U64_LDBL()
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
209 {
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
210 asm
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
211 { naked ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
212 push EDX ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
213 push EAX ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
214 and dword ptr 4[ESP], 0x7FFFFFFF ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
215 fild qword ptr [ESP] ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
216 test EDX,EDX ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
217 jns L1 ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
218 fld real ptr adjust ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
219 faddp ST(1), ST ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
220 L1: ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
221 add ESP, 8 ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
222 ret ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
223 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
224 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
225
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
226 // Same as __U64_LDBL, but return result as double in [EDX,EAX]
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
227 ulong __ULLNGDBL()
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
228 {
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
229 asm
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
230 { naked ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
231 call __U64_LDBL ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
232 sub ESP,8 ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
233 fstp double ptr [ESP] ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
234 pop EAX ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
235 pop EDX ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
236 ret ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
237 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
238 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
239
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
240 // Convert double to ulong
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
241
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
242 private short roundTo0 = 0xFBF;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
243
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
244 ulong __DBLULLNG()
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
245 {
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
246 // BUG: should handle NAN's and overflows
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
247 asm
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
248 { naked ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
249 push EDX ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
250 push EAX ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
251 fld double ptr [ESP] ;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
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252 sub ESP,8 ;
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
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253 fld real ptr adjust ;
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254 fcomp ;
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255 fstsw AX ;
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256 fstcw 8[ESP] ;
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257 fldcw roundTo0 ;
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258 sahf ;
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259 jae L1 ;
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260 fld real ptr adjust ;
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261 fsubp ST(1), ST ;
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262 fistp qword ptr [ESP] ;
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263 pop EAX ;
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264 pop EDX ;
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265 fldcw [ESP] ;
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266 add ESP,8 ;
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267 add EDX,0x8000_0000 ;
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268 ret ;
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269 L1: ;
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270 fistp qword ptr [ESP] ;
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271 pop EAX ;
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272 pop EDX ;
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273 fldcw [ESP] ;
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274 add ESP,8 ;
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275 ret ;
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
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276 }
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
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277 }
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278
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279 // Convert double in ST0 to uint
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280
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281 uint __DBLULNG()
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282 {
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283 // BUG: should handle NAN's and overflows
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284 asm
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285 { naked ;
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286 sub ESP,16 ;
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287 fstcw 8[ESP] ;
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288 fldcw roundTo0 ;
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289 fistp qword ptr [ESP] ;
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290 fldcw 8[ESP] ;
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291 pop EAX ;
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
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292 add ESP,12 ;
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
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293 ret ;
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
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294 }
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
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295 }