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* config/i386/32/sfp-machine.h (FP_HANDLE_EXCEPTIONS) [FP_EX_INVALID]:
[pf3gnuchains/gcc-fork.git] / libgcc / config / i386 / 32 / sfp-machine.h
1 #define _FP_W_TYPE_SIZE         32
2 #define _FP_W_TYPE              unsigned int
3 #define _FP_WS_TYPE             signed int
4 #define _FP_I_TYPE              int
5
6 /* The type of the result of a floating point comparison.  This must
7    match `__libgcc_cmp_return__' in GCC for the target.  */
8 typedef int __gcc_CMPtype __attribute__ ((mode (__libgcc_cmp_return__)));
9 #define CMPtype __gcc_CMPtype
10
11 #define __FP_FRAC_ADD_4(r3,r2,r1,r0,x3,x2,x1,x0,y3,y2,y1,y0)            \
12   __asm__ ("add{l} {%11,%3|%3,%11}\n\t"                                 \
13            "adc{l} {%9,%2|%2,%9}\n\t"                                   \
14            "adc{l} {%7,%1|%1,%7}\n\t"                                   \
15            "adc{l} {%5,%0|%0,%5}"                                       \
16            : "=r" ((USItype) (r3)),                                     \
17              "=&r" ((USItype) (r2)),                                    \
18              "=&r" ((USItype) (r1)),                                    \
19              "=&r" ((USItype) (r0))                                     \
20            : "%0" ((USItype) (x3)),                                     \
21              "g" ((USItype) (y3)),                                      \
22              "%1" ((USItype) (x2)),                                     \
23              "g" ((USItype) (y2)),                                      \
24              "%2" ((USItype) (x1)),                                     \
25              "g" ((USItype) (y1)),                                      \
26              "%3" ((USItype) (x0)),                                     \
27              "g" ((USItype) (y0)))
28
29 #define __FP_FRAC_ADD_3(r2,r1,r0,x2,x1,x0,y2,y1,y0)                     \
30   __asm__ ("add{l} {%8,%2|%2,%8}\n\t"                                   \
31            "adc{l} {%6,%1|%1,%6}\n\t"                                   \
32            "adc{l} {%4,%0|%0,%4}"                                       \
33            : "=r" ((USItype) (r2)),                                     \
34              "=&r" ((USItype) (r1)),                                    \
35              "=&r" ((USItype) (r0))                                     \
36            : "%0" ((USItype) (x2)),                                     \
37              "g" ((USItype) (y2)),                                      \
38              "%1" ((USItype) (x1)),                                     \
39              "g" ((USItype) (y1)),                                      \
40              "%2" ((USItype) (x0)),                                     \
41              "g" ((USItype) (y0)))
42
43 /* FIXME: The last constraint should be "g" instead of "im" if reload
44    works properly.  */
45 #define __FP_FRAC_SUB_4(r3,r2,r1,r0,x3,x2,x1,x0,y3,y2,y1,y0)            \
46   __asm__ ("sub{l} {%11,%3|%3,%11}\n\t"                                 \
47            "sbb{l} {%9,%2|%2,%9}\n\t"                                   \
48            "sbb{l} {%7,%1|%1,%7}\n\t"                                   \
49            "sbb{l} {%5,%0|%0,%5}"                                       \
50            : "=r" ((USItype) (r3)),                                     \
51              "=&r" ((USItype) (r2)),                                    \
52              "=&r" ((USItype) (r1)),                                    \
53              "=&r" ((USItype) (r0))                                     \
54            : "0" ((USItype) (x3)),                                      \
55              "g" ((USItype) (y3)),                                      \
56              "1" ((USItype) (x2)),                                      \
57              "g" ((USItype) (y2)),                                      \
58              "2" ((USItype) (x1)),                                      \
59              "g" ((USItype) (y1)),                                      \
60              "3" ((USItype) (x0)),                                      \
61              "im" ((USItype) (y0)))
62
63 #define __FP_FRAC_SUB_3(r2,r1,r0,x2,x1,x0,y2,y1,y0)                     \
64   __asm__ ("sub{l} {%8,%2|%2,%8}\n\t"                                   \
65            "sbb{l} {%6,%1|%1,%6}\n\t"                                   \
66            "sbb{l} {%4,%0|%0,%4}"                                       \
67            : "=r" ((USItype) (r2)),                                     \
68              "=&r" ((USItype) (r1)),                                    \
69              "=&r" ((USItype) (r0))                                     \
70            : "0" ((USItype) (x2)),                                      \
71              "g" ((USItype) (y2)),                                      \
72              "1" ((USItype) (x1)),                                      \
73              "g" ((USItype) (y1)),                                      \
74              "2" ((USItype) (x0)),                                      \
75              "g" ((USItype) (y0)))
76
77
78 #define _FP_MUL_MEAT_S(R,X,Y)                                   \
79   _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm)
80 #define _FP_MUL_MEAT_D(R,X,Y)                                   \
81   _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
82 #define _FP_MUL_MEAT_Q(R,X,Y)                                   \
83   _FP_MUL_MEAT_4_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
84
85 #define _FP_DIV_MEAT_S(R,X,Y)   _FP_DIV_MEAT_1_udiv(S,R,X,Y)
86 #define _FP_DIV_MEAT_D(R,X,Y)   _FP_DIV_MEAT_2_udiv(D,R,X,Y)
87 #define _FP_DIV_MEAT_Q(R,X,Y)   _FP_DIV_MEAT_4_udiv(Q,R,X,Y)
88
89 #define _FP_NANFRAC_S           _FP_QNANBIT_S
90 #define _FP_NANFRAC_D           _FP_QNANBIT_D, 0
91 /* Even if XFmode is 12byte,  we have to pad it to 16byte since soft-fp
92    emulation is done in 16byte.  */
93 #define _FP_NANFRAC_E           _FP_QNANBIT_E, 0, 0, 0
94 #define _FP_NANFRAC_Q           _FP_QNANBIT_Q, 0, 0, 0
95 #define _FP_NANSIGN_S           1
96 #define _FP_NANSIGN_D           1
97 #define _FP_NANSIGN_E           1
98 #define _FP_NANSIGN_Q           1
99
100 #define _FP_KEEPNANFRACP 1
101
102 /* Here is something Intel misdesigned: the specs don't define
103    the case where we have two NaNs with same mantissas, but
104    different sign. Different operations pick up different NaNs.  */
105 #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)                      \
106   do {                                                          \
107     if (_FP_FRAC_GT_##wc(X, Y)                                  \
108         || (_FP_FRAC_EQ_##wc(X,Y) && (OP == '+' || OP == '*'))) \
109       {                                                         \
110         R##_s = X##_s;                                          \
111         _FP_FRAC_COPY_##wc(R,X);                                \
112       }                                                         \
113     else                                                        \
114       {                                                         \
115         R##_s = Y##_s;                                          \
116         _FP_FRAC_COPY_##wc(R,Y);                                \
117       }                                                         \
118     R##_c = FP_CLS_NAN;                                         \
119   } while (0)
120
121 #define FP_EX_INVALID           0x01
122 #define FP_EX_DENORM            0x02
123 #define FP_EX_DIVZERO           0x04
124 #define FP_EX_OVERFLOW          0x08
125 #define FP_EX_UNDERFLOW         0x10
126 #define FP_EX_INEXACT           0x20
127
128 struct fenv
129 {
130   unsigned short int __control_word;
131   unsigned short int __unused1;
132   unsigned short int __status_word;
133   unsigned short int __unused2;
134   unsigned short int __tags;
135   unsigned short int __unused3;
136   unsigned int __eip;
137   unsigned short int __cs_selector;
138   unsigned int __opcode:11;
139   unsigned int __unused4:5;
140   unsigned int __data_offset;
141   unsigned short int __data_selector;
142   unsigned short int __unused5;
143 };
144
145 #define FP_HANDLE_EXCEPTIONS                                            \
146   do {                                                                  \
147     if (_fex & FP_EX_INVALID)                                           \
148       {                                                                 \
149         float f = 0.0;                                                  \
150         __asm__ __volatile__ ("fdiv %0" : "+t" (f));                    \
151         __asm__ __volatile__ ("fwait");                                 \
152       }                                                                 \
153     if (_fex & FP_EX_DIVZERO)                                           \
154       {                                                                 \
155         float f = 1.0, g = 0.0;                                         \
156         __asm__ __volatile__ ("fdivp" : "=t" (f)                        \
157                                       : "0" (f), "u" (g)                \
158                                       : "st(1)");                       \
159         __asm__ __volatile__ ("fwait");                                 \
160       }                                                                 \
161     if (_fex & FP_EX_OVERFLOW)                                          \
162       {                                                                 \
163         struct fenv temp;                                               \
164         __asm__ __volatile__ ("fnstenv %0" : "=m" (temp));              \
165         temp.__status_word |= FP_EX_OVERFLOW;                           \
166         __asm__ __volatile__ ("fldenv %0" : : "m" (temp));              \
167         __asm__ __volatile__ ("fwait");                                 \
168       }                                                                 \
169     if (_fex & FP_EX_UNDERFLOW)                                         \
170       {                                                                 \
171         struct fenv temp;                                               \
172         __asm__ __volatile__ ("fnstenv %0" : "=m" (temp));              \
173         temp.__status_word |= FP_EX_UNDERFLOW;                          \
174         __asm__ __volatile__ ("fldenv %0" : : "m" (temp));              \
175         __asm__ __volatile__ ("fwait");                                 \
176       }                                                                 \
177     if (_fex & FP_EX_INEXACT)                                           \
178       {                                                                 \
179         struct fenv temp;                                               \
180         __asm__ __volatile__ ("fnstenv %0" : "=m" (temp));              \
181         temp.__status_word |= FP_EX_INEXACT;                            \
182         __asm__ __volatile__ ("fldenv %0" : : "m" (temp));              \
183         __asm__ __volatile__ ("fwait");                                 \
184       }                                                                 \
185   } while (0)
186
187 #define FP_RND_NEAREST          0
188 #define FP_RND_ZERO             0xc00
189 #define FP_RND_PINF             0x800
190 #define FP_RND_MINF             0x400
191
192 #define _FP_DECL_EX \
193   unsigned short _fcw __attribute__ ((unused)) = FP_RND_NEAREST
194
195 #define FP_INIT_ROUNDMODE                       \
196   do {                                          \
197     __asm__ ("fnstcw %0" : "=m" (_fcw));        \
198   } while (0)
199
200 #define FP_ROUNDMODE            (_fcw & 0xc00)
201
202 #define __LITTLE_ENDIAN 1234
203 #define __BIG_ENDIAN    4321
204
205 #define __BYTE_ORDER __LITTLE_ENDIAN
206
207 /* Define ALIASNAME as a strong alias for NAME.  */
208 #if defined __MACH__
209 /* Mach-O doesn't support aliasing.  If these functions ever return
210    anything but CMPtype we need to revisit this... */
211 #define strong_alias(name, aliasname) \
212   CMPtype aliasname (TFtype a, TFtype b) { return name(a, b); }
213 #else
214 # define strong_alias(name, aliasname) _strong_alias(name, aliasname)
215 # define _strong_alias(name, aliasname) \
216   extern __typeof (name) aliasname __attribute__ ((alias (#name)));
217 #endif