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 151