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