Last change
on this file since 377 was 352, checked in by coas-nagasima, 6 years ago |
arm向けASP3版ECNLを追加
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Property svn:eol-style
set to
native
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Property svn:mime-type
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text/x-csrc;charset=UTF-8
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File size:
1.5 KB
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Rev | Line | |
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[352] | 1 | #include "libm.h"
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| 2 |
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| 3 | #if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
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| 4 | long double nextafterl(long double x, long double y)
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| 5 | {
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| 6 | return nextafter(x, y);
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| 7 | }
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| 8 | #elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384
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| 9 | long double nextafterl(long double x, long double y)
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| 10 | {
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| 11 | union ldshape ux, uy;
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| 12 |
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| 13 | if (isnan(x) || isnan(y))
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| 14 | return x + y;
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| 15 | if (x == y)
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| 16 | return y;
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| 17 | ux.f = x;
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| 18 | if (x == 0) {
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| 19 | uy.f = y;
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| 20 | ux.i.m = 1;
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| 21 | ux.i.se = uy.i.se & 0x8000;
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| 22 | } else if ((x < y) == !(ux.i.se & 0x8000)) {
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| 23 | ux.i.m++;
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| 24 | if (ux.i.m << 1 == 0) {
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| 25 | ux.i.m = 1ULL << 63;
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| 26 | ux.i.se++;
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| 27 | }
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| 28 | } else {
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| 29 | if (ux.i.m << 1 == 0) {
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| 30 | ux.i.se--;
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| 31 | if (ux.i.se)
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| 32 | ux.i.m = 0;
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| 33 | }
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| 34 | ux.i.m--;
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| 35 | }
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| 36 | /* raise overflow if ux is infinite and x is finite */
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| 37 | if ((ux.i.se & 0x7fff) == 0x7fff)
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| 38 | return x + x;
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| 39 | /* raise underflow if ux is subnormal or zero */
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| 40 | if ((ux.i.se & 0x7fff) == 0)
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| 41 | FORCE_EVAL(x*x + ux.f*ux.f);
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| 42 | return ux.f;
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| 43 | }
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| 44 | #elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384
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| 45 | long double nextafterl(long double x, long double y)
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| 46 | {
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| 47 | union ldshape ux, uy;
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| 48 |
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| 49 | if (isnan(x) || isnan(y))
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| 50 | return x + y;
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| 51 | if (x == y)
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| 52 | return y;
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| 53 | ux.f = x;
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| 54 | if (x == 0) {
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| 55 | uy.f = y;
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| 56 | ux.i.lo = 1;
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| 57 | ux.i.se = uy.i.se & 0x8000;
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| 58 | } else if ((x < y) == !(ux.i.se & 0x8000)) {
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| 59 | ux.i2.lo++;
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| 60 | if (ux.i2.lo == 0)
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| 61 | ux.i2.hi++;
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| 62 | } else {
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| 63 | if (ux.i2.lo == 0)
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| 64 | ux.i2.hi--;
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| 65 | ux.i2.lo--;
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| 66 | }
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| 67 | /* raise overflow if ux is infinite and x is finite */
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| 68 | if ((ux.i.se & 0x7fff) == 0x7fff)
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| 69 | return x + x;
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| 70 | /* raise underflow if ux is subnormal or zero */
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| 71 | if ((ux.i.se & 0x7fff) == 0)
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| 72 | FORCE_EVAL(x*x + ux.f*ux.f);
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| 73 | return ux.f;
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| 74 | }
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| 75 | #endif
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