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comparison libgcc/config/i386/64/sfp-machine.h @ 0:a06113de4d67

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first commit
author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2009 14:47:48 +0900
parents
children 77e2b8dfacca
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-1:000000000000 0:a06113de4d67
1 #define _FP_W_TYPE_SIZE 64
2 #define _FP_W_TYPE unsigned long
3 #define _FP_WS_TYPE signed long
4 #define _FP_I_TYPE long
5
6 typedef int TItype __attribute__ ((mode (TI)));
7 typedef unsigned int UTItype __attribute__ ((mode (TI)));
8
9 #define TI_BITS (__CHAR_BIT__ * (int)sizeof(TItype))
10
11 /* The type of the result of a floating point comparison. This must
12 match `__libgcc_cmp_return__' in GCC for the target. */
13 typedef int __gcc_CMPtype __attribute__ ((mode (__libgcc_cmp_return__)));
14 #define CMPtype __gcc_CMPtype
15
16 #define _FP_MUL_MEAT_Q(R,X,Y) \
17 _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
18
19 #define _FP_DIV_MEAT_Q(R,X,Y) _FP_DIV_MEAT_2_udiv(Q,R,X,Y)
20
21 #define _FP_NANFRAC_S _FP_QNANBIT_S
22 #define _FP_NANFRAC_D _FP_QNANBIT_D
23 #define _FP_NANFRAC_E _FP_QNANBIT_E, 0
24 #define _FP_NANFRAC_Q _FP_QNANBIT_Q, 0
25 #define _FP_NANSIGN_S 1
26 #define _FP_NANSIGN_D 1
27 #define _FP_NANSIGN_E 1
28 #define _FP_NANSIGN_Q 1
29
30 #define _FP_KEEPNANFRACP 1
31
32 /* Here is something Intel misdesigned: the specs don't define
33 the case where we have two NaNs with same mantissas, but
34 different sign. Different operations pick up different NaNs. */
35 #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \
36 do { \
37 if (_FP_FRAC_GT_##wc(X, Y) \
38 || (_FP_FRAC_EQ_##wc(X,Y) && (OP == '+' || OP == '*'))) \
39 { \
40 R##_s = X##_s; \
41 _FP_FRAC_COPY_##wc(R,X); \
42 } \
43 else \
44 { \
45 R##_s = Y##_s; \
46 _FP_FRAC_COPY_##wc(R,Y); \
47 } \
48 R##_c = FP_CLS_NAN; \
49 } while (0)
50
51 #define FP_EX_INVALID 0x01
52 #define FP_EX_DENORM 0x02
53 #define FP_EX_DIVZERO 0x04
54 #define FP_EX_OVERFLOW 0x08
55 #define FP_EX_UNDERFLOW 0x10
56 #define FP_EX_INEXACT 0x20
57
58 struct fenv
59 {
60 unsigned short int __control_word;
61 unsigned short int __unused1;
62 unsigned short int __status_word;
63 unsigned short int __unused2;
64 unsigned short int __tags;
65 unsigned short int __unused3;
66 unsigned int __eip;
67 unsigned short int __cs_selector;
68 unsigned int __opcode:11;
69 unsigned int __unused4:5;
70 unsigned int __data_offset;
71 unsigned short int __data_selector;
72 unsigned short int __unused5;
73 };
74
75 #define FP_HANDLE_EXCEPTIONS \
76 do { \
77 if (_fex & FP_EX_INVALID) \
78 { \
79 float f = 0.0; \
80 __asm__ __volatile__ ("divss %0, %0 " : : "x" (f)); \
81 } \
82 if (_fex & FP_EX_DIVZERO) \
83 { \
84 float f = 1.0, g = 0.0; \
85 __asm__ __volatile__ ("divss %1, %0" : : "x" (f), "x" (g)); \
86 } \
87 if (_fex & FP_EX_OVERFLOW) \
88 { \
89 struct fenv temp; \
90 __asm__ __volatile__ ("fnstenv %0" : "=m" (temp)); \
91 temp.__status_word |= FP_EX_OVERFLOW; \
92 __asm__ __volatile__ ("fldenv %0" : : "m" (temp)); \
93 __asm__ __volatile__ ("fwait"); \
94 } \
95 if (_fex & FP_EX_UNDERFLOW) \
96 { \
97 struct fenv temp; \
98 __asm__ __volatile__ ("fnstenv %0" : "=m" (temp)); \
99 temp.__status_word |= FP_EX_UNDERFLOW; \
100 __asm__ __volatile__ ("fldenv %0" : : "m" (temp)); \
101 __asm__ __volatile__ ("fwait"); \
102 } \
103 if (_fex & FP_EX_INEXACT) \
104 { \
105 struct fenv temp; \
106 __asm__ __volatile__ ("fnstenv %0" : "=m" (temp)); \
107 temp.__status_word |= FP_EX_INEXACT; \
108 __asm__ __volatile__ ("fldenv %0" : : "m" (temp)); \
109 __asm__ __volatile__ ("fwait"); \
110 } \
111 } while (0)
112
113 #define FP_RND_NEAREST 0
114 #define FP_RND_ZERO 0xc00
115 #define FP_RND_PINF 0x800
116 #define FP_RND_MINF 0x400
117
118 #define _FP_DECL_EX \
119 unsigned short _fcw __attribute__ ((unused)) = FP_RND_NEAREST
120
121 #define FP_INIT_ROUNDMODE \
122 do { \
123 __asm__ ("fnstcw %0" : "=m" (_fcw)); \
124 } while (0)
125
126 #define FP_ROUNDMODE (_fcw & 0xc00)
127
128 #define __LITTLE_ENDIAN 1234
129 #define __BIG_ENDIAN 4321
130
131 #define __BYTE_ORDER __LITTLE_ENDIAN
132
133 /* Define ALIASNAME as a strong alias for NAME. */
134 #if defined __MACH__
135 /* Mach-O doesn't support aliasing. If these functions ever return
136 anything but CMPtype we need to revisit this... */
137 #define strong_alias(name, aliasname) \
138 CMPtype aliasname (TFtype a, TFtype b) { return name(a, b); }
139 #else
140 # define strong_alias(name, aliasname) _strong_alias(name, aliasname)
141 # define _strong_alias(name, aliasname) \
142 extern __typeof (name) aliasname __attribute__ ((alias (#name)));
143 #endif