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1 #include "libm.h" | 1 #include "libm.h" |
2 | 2 |
3 #if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024 | 3 #if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024 |
4 long double sinl(long double x) | 4 long double sinl(long double x) { |
5 { | 5 return sin(x); |
6 » return sin(x); | |
7 } | 6 } |
8 #elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384 | 7 #elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384 |
9 long double sinl(long double x) | 8 long double sinl(long double x) { |
10 { | 9 union ldshape u = {x}; |
11 » union ldshape u = {x}; | 10 unsigned n; |
12 » unsigned n; | 11 long double y[2], hi, lo; |
13 » long double y[2], hi, lo; | |
14 | 12 |
15 » u.i.se &= 0x7fff; | 13 u.i.se &= 0x7fff; |
16 » if (u.i.se == 0x7fff) | 14 if (u.i.se == 0x7fff) |
17 » » return x - x; | 15 return x - x; |
18 » if (u.f < M_PI_4) { | 16 if (u.f < M_PI_4) { |
19 » » if (u.i.se < 0x3fff - LDBL_MANT_DIG/2) { | 17 if (u.i.se < 0x3fff - LDBL_MANT_DIG / 2) { |
20 » » » /* raise inexact if x!=0 and underflow if subnormal */ | 18 /* raise inexact if x!=0 and underflow if subnormal */ |
21 » » » FORCE_EVAL(u.i.se == 0 ? x*0x1p-120f : x+0x1p120f); | 19 FORCE_EVAL(u.i.se == 0 ? x * 0x1p-120f : x + 0x1p120f); |
22 » » » return x; | 20 return x; |
23 » » } | 21 } |
24 » » return __sinl(x, 0.0, 0); | 22 return __sinl(x, 0.0, 0); |
25 » } | 23 } |
26 » n = __rem_pio2l(x, y); | 24 n = __rem_pio2l(x, y); |
27 » hi = y[0]; | 25 hi = y[0]; |
28 » lo = y[1]; | 26 lo = y[1]; |
29 » switch (n & 3) { | 27 switch (n & 3) { |
30 » case 0: | 28 case 0: |
31 » » return __sinl(hi, lo, 1); | 29 return __sinl(hi, lo, 1); |
32 » case 1: | 30 case 1: |
33 » » return __cosl(hi, lo); | 31 return __cosl(hi, lo); |
34 » case 2: | 32 case 2: |
35 » » return -__sinl(hi, lo, 1); | 33 return -__sinl(hi, lo, 1); |
36 » case 3: | 34 case 3: |
37 » default: | 35 default: |
38 » » return -__cosl(hi, lo); | 36 return -__cosl(hi, lo); |
39 » } | 37 } |
40 } | 38 } |
41 #endif | 39 #endif |
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