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ChangeLog for gcc
[pf3gnuchains/gcc-fork.git] / libgcc / config / i386 / 64 / sfp-machine.h
1 #define _FP_W_TYPE_SIZE         64
2
3 #ifdef _WIN64
4  #define _FP_W_TYPE             unsigned long long
5  #define _FP_WS_TYPE            signed long long
6  #define _FP_I_TYPE             long long
7 #else
8  #define _FP_W_TYPE             unsigned long
9  #define _FP_WS_TYPE            signed long
10  #define _FP_I_TYPE             long
11 #endif
12
13 typedef int TItype __attribute__ ((mode (TI)));
14 typedef unsigned int UTItype __attribute__ ((mode (TI)));
15
16 #define TI_BITS (__CHAR_BIT__ * (int)sizeof(TItype))
17
18 /* The type of the result of a floating point comparison.  This must
19    match `__libgcc_cmp_return__' in GCC for the target.  */
20 typedef int __gcc_CMPtype __attribute__ ((mode (__libgcc_cmp_return__)));
21 #define CMPtype __gcc_CMPtype
22
23 #define _FP_MUL_MEAT_Q(R,X,Y)                           \
24   _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
25
26 #define _FP_DIV_MEAT_Q(R,X,Y)   _FP_DIV_MEAT_2_udiv(Q,R,X,Y)
27
28 #define _FP_NANFRAC_S           _FP_QNANBIT_S
29 #define _FP_NANFRAC_D           _FP_QNANBIT_D
30 #define _FP_NANFRAC_E           _FP_QNANBIT_E, 0
31 #define _FP_NANFRAC_Q           _FP_QNANBIT_Q, 0
32 #define _FP_NANSIGN_S           1
33 #define _FP_NANSIGN_D           1
34 #define _FP_NANSIGN_E           1
35 #define _FP_NANSIGN_Q           1
36
37 #define _FP_KEEPNANFRACP 1
38
39 /* Here is something Intel misdesigned: the specs don't define
40    the case where we have two NaNs with same mantissas, but
41    different sign. Different operations pick up different NaNs.  */
42 #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)                      \
43   do {                                                          \
44     if (_FP_FRAC_GT_##wc(X, Y)                                  \
45         || (_FP_FRAC_EQ_##wc(X,Y) && (OP == '+' || OP == '*'))) \
46       {                                                         \
47         R##_s = X##_s;                                          \
48         _FP_FRAC_COPY_##wc(R,X);                                \
49       }                                                         \
50     else                                                        \
51       {                                                         \
52         R##_s = Y##_s;                                          \
53         _FP_FRAC_COPY_##wc(R,Y);                                \
54       }                                                         \
55     R##_c = FP_CLS_NAN;                                         \
56   } while (0)
57
58 #define FP_EX_INVALID           0x01
59 #define FP_EX_DENORM            0x02
60 #define FP_EX_DIVZERO           0x04
61 #define FP_EX_OVERFLOW          0x08
62 #define FP_EX_UNDERFLOW         0x10
63 #define FP_EX_INEXACT           0x20
64
65 struct fenv
66 {
67   unsigned short int __control_word;
68   unsigned short int __unused1;
69   unsigned short int __status_word;
70   unsigned short int __unused2;
71   unsigned short int __tags;
72   unsigned short int __unused3;
73   unsigned int __eip;
74   unsigned short int __cs_selector;
75   unsigned int __opcode:11;
76   unsigned int __unused4:5;
77   unsigned int __data_offset;
78   unsigned short int __data_selector;
79   unsigned short int __unused5;
80 };
81
82 #define FP_HANDLE_EXCEPTIONS                                            \
83   do {                                                                  \
84     if (_fex & FP_EX_INVALID)                                           \
85       {                                                                 \
86         float f = 0.0;                                                  \
87         __asm__ __volatile__ ("divss %0, %0 " : : "x" (f));             \
88       }                                                                 \
89     if (_fex & FP_EX_DIVZERO)                                           \
90       {                                                                 \
91         float f = 1.0, g = 0.0;                                         \
92         __asm__ __volatile__ ("divss %1, %0" : : "x" (f), "x" (g));     \
93       }                                                                 \
94     if (_fex & FP_EX_OVERFLOW)                                          \
95       {                                                                 \
96         struct fenv temp;                                               \
97         __asm__ __volatile__ ("fnstenv %0" : "=m" (temp));              \
98         temp.__status_word |= FP_EX_OVERFLOW;                           \
99         __asm__ __volatile__ ("fldenv %0" : : "m" (temp));              \
100         __asm__ __volatile__ ("fwait");                                 \
101       }                                                                 \
102     if (_fex & FP_EX_UNDERFLOW)                                         \
103       {                                                                 \
104         struct fenv temp;                                               \
105         __asm__ __volatile__ ("fnstenv %0" : "=m" (temp));              \
106         temp.__status_word |= FP_EX_UNDERFLOW;                          \
107         __asm__ __volatile__ ("fldenv %0" : : "m" (temp));              \
108         __asm__ __volatile__ ("fwait");                                 \
109       }                                                                 \
110     if (_fex & FP_EX_INEXACT)                                           \
111       {                                                                 \
112         struct fenv temp;                                               \
113         __asm__ __volatile__ ("fnstenv %0" : "=m" (temp));              \
114         temp.__status_word |= FP_EX_INEXACT;                            \
115         __asm__ __volatile__ ("fldenv %0" : : "m" (temp));              \
116         __asm__ __volatile__ ("fwait");                                 \
117       }                                                                 \
118   } while (0)
119
120 #define FP_RND_NEAREST          0
121 #define FP_RND_ZERO             0xc00
122 #define FP_RND_PINF             0x800
123 #define FP_RND_MINF             0x400
124
125 #define _FP_DECL_EX \
126   unsigned short _fcw __attribute__ ((unused)) = FP_RND_NEAREST
127
128 #define FP_INIT_ROUNDMODE                       \
129   do {                                          \
130     __asm__ ("fnstcw %0" : "=m" (_fcw));        \
131   } while (0)
132
133 #define FP_ROUNDMODE            (_fcw & 0xc00)
134
135 #define __LITTLE_ENDIAN 1234
136 #define __BIG_ENDIAN    4321
137
138 #define __BYTE_ORDER __LITTLE_ENDIAN
139
140 /* Define ALIASNAME as a strong alias for NAME.  */
141 #if defined __MACH__
142 /* Mach-O doesn't support aliasing.  If these functions ever return
143    anything but CMPtype we need to revisit this... */
144 #define strong_alias(name, aliasname) \
145   CMPtype aliasname (TFtype a, TFtype b) { return name(a, b); }
146 #else
147 # define strong_alias(name, aliasname) _strong_alias(name, aliasname)
148 # define _strong_alias(name, aliasname) \
149   extern __typeof (name) aliasname __attribute__ ((alias (#name)));
150 #endif