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| 1 | #include <fenv.h> |
|---|---|
| 2 | #include <fpu_control.h> |
| 3 | |
| 4 | #define _FP_W_TYPE_SIZE 64 |
| 5 | #define _FP_W_TYPE unsigned long long |
| 6 | #define _FP_WS_TYPE signed long long |
| 7 | #define _FP_I_TYPE long long |
| 8 | |
| 9 | #define _FP_MUL_MEAT_S(R,X,Y) \ |
| 10 | _FP_MUL_MEAT_1_imm(_FP_WFRACBITS_S,R,X,Y) |
| 11 | #define _FP_MUL_MEAT_D(R,X,Y) \ |
| 12 | _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm) |
| 13 | #define _FP_MUL_MEAT_Q(R,X,Y) \ |
| 14 | _FP_MUL_MEAT_2_wide_3mul(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm) |
| 15 | |
| 16 | #define _FP_DIV_MEAT_S(R,X,Y) _FP_DIV_MEAT_1_imm(S,R,X,Y,_FP_DIV_HELP_imm) |
| 17 | #define _FP_DIV_MEAT_D(R,X,Y) _FP_DIV_MEAT_1_udiv_norm(D,R,X,Y) |
| 18 | #define _FP_DIV_MEAT_Q(R,X,Y) _FP_DIV_MEAT_2_udiv(Q,R,X,Y) |
| 19 | |
| 20 | #define _FP_NANFRAC_S ((_FP_QNANBIT_S << 1) - 1) |
| 21 | #define _FP_NANFRAC_D ((_FP_QNANBIT_D << 1) - 1) |
| 22 | #define _FP_NANFRAC_Q ((_FP_QNANBIT_Q << 1) - 1), -1 |
| 23 | #define _FP_NANSIGN_S 0 |
| 24 | #define _FP_NANSIGN_D 0 |
| 25 | #define _FP_NANSIGN_Q 0 |
| 26 | |
| 27 | #define _FP_KEEPNANFRACP 1 |
| 28 | #define _FP_QNANNEGATEDP 0 |
| 29 | |
| 30 | /* From my experiments it seems X is chosen unless one of the |
| 31 | NaNs is sNaN, in which case the result is NANSIGN/NANFRAC. */ |
| 32 | #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \ |
| 33 | do { \ |
| 34 | if ((_FP_FRAC_HIGH_RAW_##fs(X) \ |
| 35 | | _FP_FRAC_HIGH_RAW_##fs(Y)) & _FP_QNANBIT_##fs) \ |
| 36 | { \ |
| 37 | R##_s = _FP_NANSIGN_##fs; \ |
| 38 | _FP_FRAC_SET_##wc(R,_FP_NANFRAC_##fs); \ |
| 39 | } \ |
| 40 | else \ |
| 41 | { \ |
| 42 | R##_s = X##_s; \ |
| 43 | _FP_FRAC_COPY_##wc(R,X); \ |
| 44 | } \ |
| 45 | R##_c = FP_CLS_NAN; \ |
| 46 | } while (0) |
| 47 | |
| 48 | #define _FP_DECL_EX fpu_control_t _fcw |
| 49 | |
| 50 | #define FP_ROUNDMODE (_fcw & _FPU_FPCR_RM_MASK) |
| 51 | |
| 52 | #define FP_RND_NEAREST FE_TONEAREST |
| 53 | #define FP_RND_ZERO FE_TOWARDZERO |
| 54 | #define FP_RND_PINF FE_UPWARD |
| 55 | #define FP_RND_MINF FE_DOWNWARD |
| 56 | |
| 57 | #define FP_EX_INVALID FE_INVALID |
| 58 | #define FP_EX_OVERFLOW FE_OVERFLOW |
| 59 | #define FP_EX_UNDERFLOW FE_UNDERFLOW |
| 60 | #define FP_EX_DIVZERO FE_DIVBYZERO |
| 61 | #define FP_EX_INEXACT FE_INEXACT |
| 62 | |
| 63 | #define _FP_TININESS_AFTER_ROUNDING 0 |
| 64 | |
| 65 | #define FP_INIT_ROUNDMODE \ |
| 66 | do { \ |
| 67 | _FPU_GETCW (_fcw); \ |
| 68 | } while (0) |
| 69 | |
| 70 | #define FP_HANDLE_EXCEPTIONS \ |
| 71 | do { \ |
| 72 | const float fp_max = __FLT_MAX__; \ |
| 73 | const float fp_min = __FLT_MIN__; \ |
| 74 | const float fp_1e32 = 1.0e32f; \ |
| 75 | const float fp_zero = 0.0; \ |
| 76 | const float fp_one = 1.0; \ |
| 77 | unsigned fpsr; \ |
| 78 | if (_fex & FP_EX_INVALID) \ |
| 79 | { \ |
| 80 | __asm__ __volatile__ ("fdiv\ts0, %s0, %s0" \ |
| 81 | : \ |
| 82 | : "w" (fp_zero) \ |
| 83 | : "s0"); \ |
| 84 | __asm__ __volatile__ ("mrs\t%0, fpsr" : "=r" (fpsr)); \ |
| 85 | } \ |
| 86 | if (_fex & FP_EX_DIVZERO) \ |
| 87 | { \ |
| 88 | __asm__ __volatile__ ("fdiv\ts0, %s0, %s1" \ |
| 89 | : \ |
| 90 | : "w" (fp_one), "w" (fp_zero) \ |
| 91 | : "s0"); \ |
| 92 | __asm__ __volatile__ ("mrs\t%0, fpsr" : "=r" (fpsr)); \ |
| 93 | } \ |
| 94 | if (_fex & FP_EX_OVERFLOW) \ |
| 95 | { \ |
| 96 | __asm__ __volatile__ ("fadd\ts0, %s0, %s1" \ |
| 97 | : \ |
| 98 | : "w" (fp_max), "w" (fp_1e32) \ |
| 99 | : "s0"); \ |
| 100 | __asm__ __volatile__ ("mrs\t%0, fpsr" : "=r" (fpsr)); \ |
| 101 | } \ |
| 102 | if (_fex & FP_EX_UNDERFLOW) \ |
| 103 | { \ |
| 104 | __asm__ __volatile__ ("fmul\ts0, %s0, %s0" \ |
| 105 | : \ |
| 106 | : "w" (fp_min) \ |
| 107 | : "s0"); \ |
| 108 | __asm__ __volatile__ ("mrs\t%0, fpsr" : "=r" (fpsr)); \ |
| 109 | } \ |
| 110 | if (_fex & FP_EX_INEXACT) \ |
| 111 | { \ |
| 112 | __asm__ __volatile__ ("fsub\ts0, %s0, %s1" \ |
| 113 | : \ |
| 114 | : "w" (fp_max), "w" (fp_one) \ |
| 115 | : "s0"); \ |
| 116 | __asm__ __volatile__ ("mrs\t%0, fpsr" : "=r" (fpsr)); \ |
| 117 | } \ |
| 118 | } while (0) |
| 119 | |
| 120 | #define FP_TRAPPING_EXCEPTIONS ((_fcw >> FE_EXCEPT_SHIFT) & FE_ALL_EXCEPT) |
| 121 |
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