| Index: fusl/src/math/j1.c
|
| diff --git a/fusl/src/math/j1.c b/fusl/src/math/j1.c
|
| index df724d172ea0064ea919d5eeee4627243f7df1d5..d0715a2df2fa748da9e8f94538bb20e26858cf0a 100644
|
| --- a/fusl/src/math/j1.c
|
| +++ b/fusl/src/math/j1.c
|
| @@ -58,119 +58,116 @@
|
|
|
| static double pone(double), qone(double);
|
|
|
| -static const double
|
| -invsqrtpi = 5.64189583547756279280e-01, /* 0x3FE20DD7, 0x50429B6D */
|
| -tpi = 6.36619772367581382433e-01; /* 0x3FE45F30, 0x6DC9C883 */
|
| +static const double invsqrtpi =
|
| + 5.64189583547756279280e-01, /* 0x3FE20DD7, 0x50429B6D */
|
| + tpi = 6.36619772367581382433e-01; /* 0x3FE45F30, 0x6DC9C883 */
|
|
|
| -static double common(uint32_t ix, double x, int y1, int sign)
|
| -{
|
| - double z,s,c,ss,cc;
|
| +static double common(uint32_t ix, double x, int y1, int sign) {
|
| + double z, s, c, ss, cc;
|
|
|
| - /*
|
| - * j1(x) = sqrt(2/(pi*x))*(p1(x)*cos(x-3pi/4)-q1(x)*sin(x-3pi/4))
|
| - * y1(x) = sqrt(2/(pi*x))*(p1(x)*sin(x-3pi/4)+q1(x)*cos(x-3pi/4))
|
| - *
|
| - * sin(x-3pi/4) = -(sin(x) + cos(x))/sqrt(2)
|
| - * cos(x-3pi/4) = (sin(x) - cos(x))/sqrt(2)
|
| - * sin(x) +- cos(x) = -cos(2x)/(sin(x) -+ cos(x))
|
| - */
|
| - s = sin(x);
|
| - if (y1)
|
| - s = -s;
|
| - c = cos(x);
|
| - cc = s-c;
|
| - if (ix < 0x7fe00000) {
|
| - /* avoid overflow in 2*x */
|
| - ss = -s-c;
|
| - z = cos(2*x);
|
| - if (s*c > 0)
|
| - cc = z/ss;
|
| - else
|
| - ss = z/cc;
|
| - if (ix < 0x48000000) {
|
| - if (y1)
|
| - ss = -ss;
|
| - cc = pone(x)*cc-qone(x)*ss;
|
| - }
|
| - }
|
| - if (sign)
|
| - cc = -cc;
|
| - return invsqrtpi*cc/sqrt(x);
|
| + /*
|
| + * j1(x) = sqrt(2/(pi*x))*(p1(x)*cos(x-3pi/4)-q1(x)*sin(x-3pi/4))
|
| + * y1(x) = sqrt(2/(pi*x))*(p1(x)*sin(x-3pi/4)+q1(x)*cos(x-3pi/4))
|
| + *
|
| + * sin(x-3pi/4) = -(sin(x) + cos(x))/sqrt(2)
|
| + * cos(x-3pi/4) = (sin(x) - cos(x))/sqrt(2)
|
| + * sin(x) +- cos(x) = -cos(2x)/(sin(x) -+ cos(x))
|
| + */
|
| + s = sin(x);
|
| + if (y1)
|
| + s = -s;
|
| + c = cos(x);
|
| + cc = s - c;
|
| + if (ix < 0x7fe00000) {
|
| + /* avoid overflow in 2*x */
|
| + ss = -s - c;
|
| + z = cos(2 * x);
|
| + if (s * c > 0)
|
| + cc = z / ss;
|
| + else
|
| + ss = z / cc;
|
| + if (ix < 0x48000000) {
|
| + if (y1)
|
| + ss = -ss;
|
| + cc = pone(x) * cc - qone(x) * ss;
|
| + }
|
| + }
|
| + if (sign)
|
| + cc = -cc;
|
| + return invsqrtpi * cc / sqrt(x);
|
| }
|
|
|
| /* R0/S0 on [0,2] */
|
| static const double
|
| -r00 = -6.25000000000000000000e-02, /* 0xBFB00000, 0x00000000 */
|
| -r01 = 1.40705666955189706048e-03, /* 0x3F570D9F, 0x98472C61 */
|
| -r02 = -1.59955631084035597520e-05, /* 0xBEF0C5C6, 0xBA169668 */
|
| -r03 = 4.96727999609584448412e-08, /* 0x3E6AAAFA, 0x46CA0BD9 */
|
| -s01 = 1.91537599538363460805e-02, /* 0x3F939D0B, 0x12637E53 */
|
| -s02 = 1.85946785588630915560e-04, /* 0x3F285F56, 0xB9CDF664 */
|
| -s03 = 1.17718464042623683263e-06, /* 0x3EB3BFF8, 0x333F8498 */
|
| -s04 = 5.04636257076217042715e-09, /* 0x3E35AC88, 0xC97DFF2C */
|
| -s05 = 1.23542274426137913908e-11; /* 0x3DAB2ACF, 0xCFB97ED8 */
|
| + r00 = -6.25000000000000000000e-02, /* 0xBFB00000, 0x00000000 */
|
| + r01 = 1.40705666955189706048e-03, /* 0x3F570D9F, 0x98472C61 */
|
| + r02 = -1.59955631084035597520e-05, /* 0xBEF0C5C6, 0xBA169668 */
|
| + r03 = 4.96727999609584448412e-08, /* 0x3E6AAAFA, 0x46CA0BD9 */
|
| + s01 = 1.91537599538363460805e-02, /* 0x3F939D0B, 0x12637E53 */
|
| + s02 = 1.85946785588630915560e-04, /* 0x3F285F56, 0xB9CDF664 */
|
| + s03 = 1.17718464042623683263e-06, /* 0x3EB3BFF8, 0x333F8498 */
|
| + s04 = 5.04636257076217042715e-09, /* 0x3E35AC88, 0xC97DFF2C */
|
| + s05 = 1.23542274426137913908e-11; /* 0x3DAB2ACF, 0xCFB97ED8 */
|
|
|
| -double j1(double x)
|
| -{
|
| - double z,r,s;
|
| - uint32_t ix;
|
| - int sign;
|
| +double j1(double x) {
|
| + double z, r, s;
|
| + uint32_t ix;
|
| + int sign;
|
|
|
| - GET_HIGH_WORD(ix, x);
|
| - sign = ix>>31;
|
| - ix &= 0x7fffffff;
|
| - if (ix >= 0x7ff00000)
|
| - return 1/(x*x);
|
| - if (ix >= 0x40000000) /* |x| >= 2 */
|
| - return common(ix, fabs(x), 0, sign);
|
| - if (ix >= 0x38000000) { /* |x| >= 2**-127 */
|
| - z = x*x;
|
| - r = z*(r00+z*(r01+z*(r02+z*r03)));
|
| - s = 1+z*(s01+z*(s02+z*(s03+z*(s04+z*s05))));
|
| - z = r/s;
|
| - } else
|
| - /* avoid underflow, raise inexact if x!=0 */
|
| - z = x;
|
| - return (0.5 + z)*x;
|
| + GET_HIGH_WORD(ix, x);
|
| + sign = ix >> 31;
|
| + ix &= 0x7fffffff;
|
| + if (ix >= 0x7ff00000)
|
| + return 1 / (x * x);
|
| + if (ix >= 0x40000000) /* |x| >= 2 */
|
| + return common(ix, fabs(x), 0, sign);
|
| + if (ix >= 0x38000000) { /* |x| >= 2**-127 */
|
| + z = x * x;
|
| + r = z * (r00 + z * (r01 + z * (r02 + z * r03)));
|
| + s = 1 + z * (s01 + z * (s02 + z * (s03 + z * (s04 + z * s05))));
|
| + z = r / s;
|
| + } else
|
| + /* avoid underflow, raise inexact if x!=0 */
|
| + z = x;
|
| + return (0.5 + z) * x;
|
| }
|
|
|
| static const double U0[5] = {
|
| - -1.96057090646238940668e-01, /* 0xBFC91866, 0x143CBC8A */
|
| - 5.04438716639811282616e-02, /* 0x3FA9D3C7, 0x76292CD1 */
|
| - -1.91256895875763547298e-03, /* 0xBF5F55E5, 0x4844F50F */
|
| - 2.35252600561610495928e-05, /* 0x3EF8AB03, 0x8FA6B88E */
|
| - -9.19099158039878874504e-08, /* 0xBE78AC00, 0x569105B8 */
|
| + -1.96057090646238940668e-01, /* 0xBFC91866, 0x143CBC8A */
|
| + 5.04438716639811282616e-02, /* 0x3FA9D3C7, 0x76292CD1 */
|
| + -1.91256895875763547298e-03, /* 0xBF5F55E5, 0x4844F50F */
|
| + 2.35252600561610495928e-05, /* 0x3EF8AB03, 0x8FA6B88E */
|
| + -9.19099158039878874504e-08, /* 0xBE78AC00, 0x569105B8 */
|
| };
|
| static const double V0[5] = {
|
| - 1.99167318236649903973e-02, /* 0x3F94650D, 0x3F4DA9F0 */
|
| - 2.02552581025135171496e-04, /* 0x3F2A8C89, 0x6C257764 */
|
| - 1.35608801097516229404e-06, /* 0x3EB6C05A, 0x894E8CA6 */
|
| - 6.22741452364621501295e-09, /* 0x3E3ABF1D, 0x5BA69A86 */
|
| - 1.66559246207992079114e-11, /* 0x3DB25039, 0xDACA772A */
|
| + 1.99167318236649903973e-02, /* 0x3F94650D, 0x3F4DA9F0 */
|
| + 2.02552581025135171496e-04, /* 0x3F2A8C89, 0x6C257764 */
|
| + 1.35608801097516229404e-06, /* 0x3EB6C05A, 0x894E8CA6 */
|
| + 6.22741452364621501295e-09, /* 0x3E3ABF1D, 0x5BA69A86 */
|
| + 1.66559246207992079114e-11, /* 0x3DB25039, 0xDACA772A */
|
| };
|
|
|
| -double y1(double x)
|
| -{
|
| - double z,u,v;
|
| - uint32_t ix,lx;
|
| +double y1(double x) {
|
| + double z, u, v;
|
| + uint32_t ix, lx;
|
|
|
| - EXTRACT_WORDS(ix, lx, x);
|
| - /* y1(nan)=nan, y1(<0)=nan, y1(0)=-inf, y1(inf)=0 */
|
| - if ((ix<<1 | lx) == 0)
|
| - return -1/0.0;
|
| - if (ix>>31)
|
| - return 0/0.0;
|
| - if (ix >= 0x7ff00000)
|
| - return 1/x;
|
| + EXTRACT_WORDS(ix, lx, x);
|
| + /* y1(nan)=nan, y1(<0)=nan, y1(0)=-inf, y1(inf)=0 */
|
| + if ((ix << 1 | lx) == 0)
|
| + return -1 / 0.0;
|
| + if (ix >> 31)
|
| + return 0 / 0.0;
|
| + if (ix >= 0x7ff00000)
|
| + return 1 / x;
|
|
|
| - if (ix >= 0x40000000) /* x >= 2 */
|
| - return common(ix, x, 1, 0);
|
| - if (ix < 0x3c900000) /* x < 2**-54 */
|
| - return -tpi/x;
|
| - z = x*x;
|
| - u = U0[0]+z*(U0[1]+z*(U0[2]+z*(U0[3]+z*U0[4])));
|
| - v = 1+z*(V0[0]+z*(V0[1]+z*(V0[2]+z*(V0[3]+z*V0[4]))));
|
| - return x*(u/v) + tpi*(j1(x)*log(x)-1/x);
|
| + if (ix >= 0x40000000) /* x >= 2 */
|
| + return common(ix, x, 1, 0);
|
| + if (ix < 0x3c900000) /* x < 2**-54 */
|
| + return -tpi / x;
|
| + z = x * x;
|
| + u = U0[0] + z * (U0[1] + z * (U0[2] + z * (U0[3] + z * U0[4])));
|
| + v = 1 + z * (V0[0] + z * (V0[1] + z * (V0[2] + z * (V0[3] + z * V0[4]))));
|
| + return x * (u / v) + tpi * (j1(x) * log(x) - 1 / x);
|
| }
|
|
|
| /* For x >= 8, the asymptotic expansions of pone is
|
| @@ -183,86 +180,97 @@ double y1(double x)
|
| * | pone(x)-1-R/S | <= 2 ** ( -60.06)
|
| */
|
|
|
| -static const double pr8[6] = { /* for x in [inf, 8]=1/[0,0.125] */
|
| - 0.00000000000000000000e+00, /* 0x00000000, 0x00000000 */
|
| - 1.17187499999988647970e-01, /* 0x3FBDFFFF, 0xFFFFFCCE */
|
| - 1.32394806593073575129e+01, /* 0x402A7A9D, 0x357F7FCE */
|
| - 4.12051854307378562225e+02, /* 0x4079C0D4, 0x652EA590 */
|
| - 3.87474538913960532227e+03, /* 0x40AE457D, 0xA3A532CC */
|
| - 7.91447954031891731574e+03, /* 0x40BEEA7A, 0xC32782DD */
|
| +static const double pr8[6] = {
|
| + /* for x in [inf, 8]=1/[0,0.125] */
|
| + 0.00000000000000000000e+00, /* 0x00000000, 0x00000000 */
|
| + 1.17187499999988647970e-01, /* 0x3FBDFFFF, 0xFFFFFCCE */
|
| + 1.32394806593073575129e+01, /* 0x402A7A9D, 0x357F7FCE */
|
| + 4.12051854307378562225e+02, /* 0x4079C0D4, 0x652EA590 */
|
| + 3.87474538913960532227e+03, /* 0x40AE457D, 0xA3A532CC */
|
| + 7.91447954031891731574e+03, /* 0x40BEEA7A, 0xC32782DD */
|
| };
|
| static const double ps8[5] = {
|
| - 1.14207370375678408436e+02, /* 0x405C8D45, 0x8E656CAC */
|
| - 3.65093083420853463394e+03, /* 0x40AC85DC, 0x964D274F */
|
| - 3.69562060269033463555e+04, /* 0x40E20B86, 0x97C5BB7F */
|
| - 9.76027935934950801311e+04, /* 0x40F7D42C, 0xB28F17BB */
|
| - 3.08042720627888811578e+04, /* 0x40DE1511, 0x697A0B2D */
|
| + 1.14207370375678408436e+02, /* 0x405C8D45, 0x8E656CAC */
|
| + 3.65093083420853463394e+03, /* 0x40AC85DC, 0x964D274F */
|
| + 3.69562060269033463555e+04, /* 0x40E20B86, 0x97C5BB7F */
|
| + 9.76027935934950801311e+04, /* 0x40F7D42C, 0xB28F17BB */
|
| + 3.08042720627888811578e+04, /* 0x40DE1511, 0x697A0B2D */
|
| };
|
|
|
| -static const double pr5[6] = { /* for x in [8,4.5454]=1/[0.125,0.22001] */
|
| - 1.31990519556243522749e-11, /* 0x3DAD0667, 0xDAE1CA7D */
|
| - 1.17187493190614097638e-01, /* 0x3FBDFFFF, 0xE2C10043 */
|
| - 6.80275127868432871736e+00, /* 0x401B3604, 0x6E6315E3 */
|
| - 1.08308182990189109773e+02, /* 0x405B13B9, 0x452602ED */
|
| - 5.17636139533199752805e+02, /* 0x40802D16, 0xD052D649 */
|
| - 5.28715201363337541807e+02, /* 0x408085B8, 0xBB7E0CB7 */
|
| +static const double pr5[6] = {
|
| + /* for x in [8,4.5454]=1/[0.125,0.22001] */
|
| + 1.31990519556243522749e-11, /* 0x3DAD0667, 0xDAE1CA7D */
|
| + 1.17187493190614097638e-01, /* 0x3FBDFFFF, 0xE2C10043 */
|
| + 6.80275127868432871736e+00, /* 0x401B3604, 0x6E6315E3 */
|
| + 1.08308182990189109773e+02, /* 0x405B13B9, 0x452602ED */
|
| + 5.17636139533199752805e+02, /* 0x40802D16, 0xD052D649 */
|
| + 5.28715201363337541807e+02, /* 0x408085B8, 0xBB7E0CB7 */
|
| };
|
| static const double ps5[5] = {
|
| - 5.92805987221131331921e+01, /* 0x404DA3EA, 0xA8AF633D */
|
| - 9.91401418733614377743e+02, /* 0x408EFB36, 0x1B066701 */
|
| - 5.35326695291487976647e+03, /* 0x40B4E944, 0x5706B6FB */
|
| - 7.84469031749551231769e+03, /* 0x40BEA4B0, 0xB8A5BB15 */
|
| - 1.50404688810361062679e+03, /* 0x40978030, 0x036F5E51 */
|
| + 5.92805987221131331921e+01, /* 0x404DA3EA, 0xA8AF633D */
|
| + 9.91401418733614377743e+02, /* 0x408EFB36, 0x1B066701 */
|
| + 5.35326695291487976647e+03, /* 0x40B4E944, 0x5706B6FB */
|
| + 7.84469031749551231769e+03, /* 0x40BEA4B0, 0xB8A5BB15 */
|
| + 1.50404688810361062679e+03, /* 0x40978030, 0x036F5E51 */
|
| };
|
|
|
| static const double pr3[6] = {
|
| - 3.02503916137373618024e-09, /* 0x3E29FC21, 0xA7AD9EDD */
|
| - 1.17186865567253592491e-01, /* 0x3FBDFFF5, 0x5B21D17B */
|
| - 3.93297750033315640650e+00, /* 0x400F76BC, 0xE85EAD8A */
|
| - 3.51194035591636932736e+01, /* 0x40418F48, 0x9DA6D129 */
|
| - 9.10550110750781271918e+01, /* 0x4056C385, 0x4D2C1837 */
|
| - 4.85590685197364919645e+01, /* 0x4048478F, 0x8EA83EE5 */
|
| + 3.02503916137373618024e-09, /* 0x3E29FC21, 0xA7AD9EDD */
|
| + 1.17186865567253592491e-01, /* 0x3FBDFFF5, 0x5B21D17B */
|
| + 3.93297750033315640650e+00, /* 0x400F76BC, 0xE85EAD8A */
|
| + 3.51194035591636932736e+01, /* 0x40418F48, 0x9DA6D129 */
|
| + 9.10550110750781271918e+01, /* 0x4056C385, 0x4D2C1837 */
|
| + 4.85590685197364919645e+01, /* 0x4048478F, 0x8EA83EE5 */
|
| };
|
| static const double ps3[5] = {
|
| - 3.47913095001251519989e+01, /* 0x40416549, 0xA134069C */
|
| - 3.36762458747825746741e+02, /* 0x40750C33, 0x07F1A75F */
|
| - 1.04687139975775130551e+03, /* 0x40905B7C, 0x5037D523 */
|
| - 8.90811346398256432622e+02, /* 0x408BD67D, 0xA32E31E9 */
|
| - 1.03787932439639277504e+02, /* 0x4059F26D, 0x7C2EED53 */
|
| + 3.47913095001251519989e+01, /* 0x40416549, 0xA134069C */
|
| + 3.36762458747825746741e+02, /* 0x40750C33, 0x07F1A75F */
|
| + 1.04687139975775130551e+03, /* 0x40905B7C, 0x5037D523 */
|
| + 8.90811346398256432622e+02, /* 0x408BD67D, 0xA32E31E9 */
|
| + 1.03787932439639277504e+02, /* 0x4059F26D, 0x7C2EED53 */
|
| };
|
|
|
| -static const double pr2[6] = {/* for x in [2.8570,2]=1/[0.3499,0.5] */
|
| - 1.07710830106873743082e-07, /* 0x3E7CE9D4, 0xF65544F4 */
|
| - 1.17176219462683348094e-01, /* 0x3FBDFF42, 0xBE760D83 */
|
| - 2.36851496667608785174e+00, /* 0x4002F2B7, 0xF98FAEC0 */
|
| - 1.22426109148261232917e+01, /* 0x40287C37, 0x7F71A964 */
|
| - 1.76939711271687727390e+01, /* 0x4031B1A8, 0x177F8EE2 */
|
| - 5.07352312588818499250e+00, /* 0x40144B49, 0xA574C1FE */
|
| +static const double pr2[6] = {
|
| + /* for x in [2.8570,2]=1/[0.3499,0.5] */
|
| + 1.07710830106873743082e-07, /* 0x3E7CE9D4, 0xF65544F4 */
|
| + 1.17176219462683348094e-01, /* 0x3FBDFF42, 0xBE760D83 */
|
| + 2.36851496667608785174e+00, /* 0x4002F2B7, 0xF98FAEC0 */
|
| + 1.22426109148261232917e+01, /* 0x40287C37, 0x7F71A964 */
|
| + 1.76939711271687727390e+01, /* 0x4031B1A8, 0x177F8EE2 */
|
| + 5.07352312588818499250e+00, /* 0x40144B49, 0xA574C1FE */
|
| };
|
| static const double ps2[5] = {
|
| - 2.14364859363821409488e+01, /* 0x40356FBD, 0x8AD5ECDC */
|
| - 1.25290227168402751090e+02, /* 0x405F5293, 0x14F92CD5 */
|
| - 2.32276469057162813669e+02, /* 0x406D08D8, 0xD5A2DBD9 */
|
| - 1.17679373287147100768e+02, /* 0x405D6B7A, 0xDA1884A9 */
|
| - 8.36463893371618283368e+00, /* 0x4020BAB1, 0xF44E5192 */
|
| + 2.14364859363821409488e+01, /* 0x40356FBD, 0x8AD5ECDC */
|
| + 1.25290227168402751090e+02, /* 0x405F5293, 0x14F92CD5 */
|
| + 2.32276469057162813669e+02, /* 0x406D08D8, 0xD5A2DBD9 */
|
| + 1.17679373287147100768e+02, /* 0x405D6B7A, 0xDA1884A9 */
|
| + 8.36463893371618283368e+00, /* 0x4020BAB1, 0xF44E5192 */
|
| };
|
|
|
| -static double pone(double x)
|
| -{
|
| - const double *p,*q;
|
| - double_t z,r,s;
|
| - uint32_t ix;
|
| +static double pone(double x) {
|
| + const double *p, *q;
|
| + double_t z, r, s;
|
| + uint32_t ix;
|
|
|
| - GET_HIGH_WORD(ix, x);
|
| - ix &= 0x7fffffff;
|
| - if (ix >= 0x40200000){p = pr8; q = ps8;}
|
| - else if (ix >= 0x40122E8B){p = pr5; q = ps5;}
|
| - else if (ix >= 0x4006DB6D){p = pr3; q = ps3;}
|
| - else /*ix >= 0x40000000*/ {p = pr2; q = ps2;}
|
| - z = 1.0/(x*x);
|
| - r = p[0]+z*(p[1]+z*(p[2]+z*(p[3]+z*(p[4]+z*p[5]))));
|
| - s = 1.0+z*(q[0]+z*(q[1]+z*(q[2]+z*(q[3]+z*q[4]))));
|
| - return 1.0+ r/s;
|
| + GET_HIGH_WORD(ix, x);
|
| + ix &= 0x7fffffff;
|
| + if (ix >= 0x40200000) {
|
| + p = pr8;
|
| + q = ps8;
|
| + } else if (ix >= 0x40122E8B) {
|
| + p = pr5;
|
| + q = ps5;
|
| + } else if (ix >= 0x4006DB6D) {
|
| + p = pr3;
|
| + q = ps3;
|
| + } else /*ix >= 0x40000000*/ {
|
| + p = pr2;
|
| + q = ps2;
|
| + }
|
| + z = 1.0 / (x * x);
|
| + r = p[0] + z * (p[1] + z * (p[2] + z * (p[3] + z * (p[4] + z * p[5]))));
|
| + s = 1.0 + z * (q[0] + z * (q[1] + z * (q[2] + z * (q[3] + z * q[4]))));
|
| + return 1.0 + r / s;
|
| }
|
|
|
| /* For x >= 8, the asymptotic expansions of qone is
|
| @@ -275,88 +283,100 @@ static double pone(double x)
|
| * | qone(x)/s -0.375-R/S | <= 2 ** ( -61.13)
|
| */
|
|
|
| -static const double qr8[6] = { /* for x in [inf, 8]=1/[0,0.125] */
|
| - 0.00000000000000000000e+00, /* 0x00000000, 0x00000000 */
|
| - -1.02539062499992714161e-01, /* 0xBFBA3FFF, 0xFFFFFDF3 */
|
| - -1.62717534544589987888e+01, /* 0xC0304591, 0xA26779F7 */
|
| - -7.59601722513950107896e+02, /* 0xC087BCD0, 0x53E4B576 */
|
| - -1.18498066702429587167e+04, /* 0xC0C724E7, 0x40F87415 */
|
| - -4.84385124285750353010e+04, /* 0xC0E7A6D0, 0x65D09C6A */
|
| +static const double qr8[6] = {
|
| + /* for x in [inf, 8]=1/[0,0.125] */
|
| + 0.00000000000000000000e+00, /* 0x00000000, 0x00000000 */
|
| + -1.02539062499992714161e-01, /* 0xBFBA3FFF, 0xFFFFFDF3 */
|
| + -1.62717534544589987888e+01, /* 0xC0304591, 0xA26779F7 */
|
| + -7.59601722513950107896e+02, /* 0xC087BCD0, 0x53E4B576 */
|
| + -1.18498066702429587167e+04, /* 0xC0C724E7, 0x40F87415 */
|
| + -4.84385124285750353010e+04, /* 0xC0E7A6D0, 0x65D09C6A */
|
| };
|
| static const double qs8[6] = {
|
| - 1.61395369700722909556e+02, /* 0x40642CA6, 0xDE5BCDE5 */
|
| - 7.82538599923348465381e+03, /* 0x40BE9162, 0xD0D88419 */
|
| - 1.33875336287249578163e+05, /* 0x4100579A, 0xB0B75E98 */
|
| - 7.19657723683240939863e+05, /* 0x4125F653, 0x72869C19 */
|
| - 6.66601232617776375264e+05, /* 0x412457D2, 0x7719AD5C */
|
| - -2.94490264303834643215e+05, /* 0xC111F969, 0x0EA5AA18 */
|
| + 1.61395369700722909556e+02, /* 0x40642CA6, 0xDE5BCDE5 */
|
| + 7.82538599923348465381e+03, /* 0x40BE9162, 0xD0D88419 */
|
| + 1.33875336287249578163e+05, /* 0x4100579A, 0xB0B75E98 */
|
| + 7.19657723683240939863e+05, /* 0x4125F653, 0x72869C19 */
|
| + 6.66601232617776375264e+05, /* 0x412457D2, 0x7719AD5C */
|
| + -2.94490264303834643215e+05, /* 0xC111F969, 0x0EA5AA18 */
|
| };
|
|
|
| -static const double qr5[6] = { /* for x in [8,4.5454]=1/[0.125,0.22001] */
|
| - -2.08979931141764104297e-11, /* 0xBDB6FA43, 0x1AA1A098 */
|
| - -1.02539050241375426231e-01, /* 0xBFBA3FFF, 0xCB597FEF */
|
| - -8.05644828123936029840e+00, /* 0xC0201CE6, 0xCA03AD4B */
|
| - -1.83669607474888380239e+02, /* 0xC066F56D, 0x6CA7B9B0 */
|
| - -1.37319376065508163265e+03, /* 0xC09574C6, 0x6931734F */
|
| - -2.61244440453215656817e+03, /* 0xC0A468E3, 0x88FDA79D */
|
| +static const double qr5[6] = {
|
| + /* for x in [8,4.5454]=1/[0.125,0.22001] */
|
| + -2.08979931141764104297e-11, /* 0xBDB6FA43, 0x1AA1A098 */
|
| + -1.02539050241375426231e-01, /* 0xBFBA3FFF, 0xCB597FEF */
|
| + -8.05644828123936029840e+00, /* 0xC0201CE6, 0xCA03AD4B */
|
| + -1.83669607474888380239e+02, /* 0xC066F56D, 0x6CA7B9B0 */
|
| + -1.37319376065508163265e+03, /* 0xC09574C6, 0x6931734F */
|
| + -2.61244440453215656817e+03, /* 0xC0A468E3, 0x88FDA79D */
|
| };
|
| static const double qs5[6] = {
|
| - 8.12765501384335777857e+01, /* 0x405451B2, 0xFF5A11B2 */
|
| - 1.99179873460485964642e+03, /* 0x409F1F31, 0xE77BF839 */
|
| - 1.74684851924908907677e+04, /* 0x40D10F1F, 0x0D64CE29 */
|
| - 4.98514270910352279316e+04, /* 0x40E8576D, 0xAABAD197 */
|
| - 2.79480751638918118260e+04, /* 0x40DB4B04, 0xCF7C364B */
|
| - -4.71918354795128470869e+03, /* 0xC0B26F2E, 0xFCFFA004 */
|
| + 8.12765501384335777857e+01, /* 0x405451B2, 0xFF5A11B2 */
|
| + 1.99179873460485964642e+03, /* 0x409F1F31, 0xE77BF839 */
|
| + 1.74684851924908907677e+04, /* 0x40D10F1F, 0x0D64CE29 */
|
| + 4.98514270910352279316e+04, /* 0x40E8576D, 0xAABAD197 */
|
| + 2.79480751638918118260e+04, /* 0x40DB4B04, 0xCF7C364B */
|
| + -4.71918354795128470869e+03, /* 0xC0B26F2E, 0xFCFFA004 */
|
| };
|
|
|
| static const double qr3[6] = {
|
| - -5.07831226461766561369e-09, /* 0xBE35CFA9, 0xD38FC84F */
|
| - -1.02537829820837089745e-01, /* 0xBFBA3FEB, 0x51AEED54 */
|
| - -4.61011581139473403113e+00, /* 0xC01270C2, 0x3302D9FF */
|
| - -5.78472216562783643212e+01, /* 0xC04CEC71, 0xC25D16DA */
|
| - -2.28244540737631695038e+02, /* 0xC06C87D3, 0x4718D55F */
|
| - -2.19210128478909325622e+02, /* 0xC06B66B9, 0x5F5C1BF6 */
|
| + -5.07831226461766561369e-09, /* 0xBE35CFA9, 0xD38FC84F */
|
| + -1.02537829820837089745e-01, /* 0xBFBA3FEB, 0x51AEED54 */
|
| + -4.61011581139473403113e+00, /* 0xC01270C2, 0x3302D9FF */
|
| + -5.78472216562783643212e+01, /* 0xC04CEC71, 0xC25D16DA */
|
| + -2.28244540737631695038e+02, /* 0xC06C87D3, 0x4718D55F */
|
| + -2.19210128478909325622e+02, /* 0xC06B66B9, 0x5F5C1BF6 */
|
| };
|
| static const double qs3[6] = {
|
| - 4.76651550323729509273e+01, /* 0x4047D523, 0xCCD367E4 */
|
| - 6.73865112676699709482e+02, /* 0x40850EEB, 0xC031EE3E */
|
| - 3.38015286679526343505e+03, /* 0x40AA684E, 0x448E7C9A */
|
| - 5.54772909720722782367e+03, /* 0x40B5ABBA, 0xA61D54A6 */
|
| - 1.90311919338810798763e+03, /* 0x409DBC7A, 0x0DD4DF4B */
|
| - -1.35201191444307340817e+02, /* 0xC060E670, 0x290A311F */
|
| + 4.76651550323729509273e+01, /* 0x4047D523, 0xCCD367E4 */
|
| + 6.73865112676699709482e+02, /* 0x40850EEB, 0xC031EE3E */
|
| + 3.38015286679526343505e+03, /* 0x40AA684E, 0x448E7C9A */
|
| + 5.54772909720722782367e+03, /* 0x40B5ABBA, 0xA61D54A6 */
|
| + 1.90311919338810798763e+03, /* 0x409DBC7A, 0x0DD4DF4B */
|
| + -1.35201191444307340817e+02, /* 0xC060E670, 0x290A311F */
|
| };
|
|
|
| -static const double qr2[6] = {/* for x in [2.8570,2]=1/[0.3499,0.5] */
|
| - -1.78381727510958865572e-07, /* 0xBE87F126, 0x44C626D2 */
|
| - -1.02517042607985553460e-01, /* 0xBFBA3E8E, 0x9148B010 */
|
| - -2.75220568278187460720e+00, /* 0xC0060484, 0x69BB4EDA */
|
| - -1.96636162643703720221e+01, /* 0xC033A9E2, 0xC168907F */
|
| - -4.23253133372830490089e+01, /* 0xC04529A3, 0xDE104AAA */
|
| - -2.13719211703704061733e+01, /* 0xC0355F36, 0x39CF6E52 */
|
| +static const double qr2[6] = {
|
| + /* for x in [2.8570,2]=1/[0.3499,0.5] */
|
| + -1.78381727510958865572e-07, /* 0xBE87F126, 0x44C626D2 */
|
| + -1.02517042607985553460e-01, /* 0xBFBA3E8E, 0x9148B010 */
|
| + -2.75220568278187460720e+00, /* 0xC0060484, 0x69BB4EDA */
|
| + -1.96636162643703720221e+01, /* 0xC033A9E2, 0xC168907F */
|
| + -4.23253133372830490089e+01, /* 0xC04529A3, 0xDE104AAA */
|
| + -2.13719211703704061733e+01, /* 0xC0355F36, 0x39CF6E52 */
|
| };
|
| static const double qs2[6] = {
|
| - 2.95333629060523854548e+01, /* 0x403D888A, 0x78AE64FF */
|
| - 2.52981549982190529136e+02, /* 0x406F9F68, 0xDB821CBA */
|
| - 7.57502834868645436472e+02, /* 0x4087AC05, 0xCE49A0F7 */
|
| - 7.39393205320467245656e+02, /* 0x40871B25, 0x48D4C029 */
|
| - 1.55949003336666123687e+02, /* 0x40637E5E, 0x3C3ED8D4 */
|
| - -4.95949898822628210127e+00, /* 0xC013D686, 0xE71BE86B */
|
| + 2.95333629060523854548e+01, /* 0x403D888A, 0x78AE64FF */
|
| + 2.52981549982190529136e+02, /* 0x406F9F68, 0xDB821CBA */
|
| + 7.57502834868645436472e+02, /* 0x4087AC05, 0xCE49A0F7 */
|
| + 7.39393205320467245656e+02, /* 0x40871B25, 0x48D4C029 */
|
| + 1.55949003336666123687e+02, /* 0x40637E5E, 0x3C3ED8D4 */
|
| + -4.95949898822628210127e+00, /* 0xC013D686, 0xE71BE86B */
|
| };
|
|
|
| -static double qone(double x)
|
| -{
|
| - const double *p,*q;
|
| - double_t s,r,z;
|
| - uint32_t ix;
|
| +static double qone(double x) {
|
| + const double *p, *q;
|
| + double_t s, r, z;
|
| + uint32_t ix;
|
|
|
| - GET_HIGH_WORD(ix, x);
|
| - ix &= 0x7fffffff;
|
| - if (ix >= 0x40200000){p = qr8; q = qs8;}
|
| - else if (ix >= 0x40122E8B){p = qr5; q = qs5;}
|
| - else if (ix >= 0x4006DB6D){p = qr3; q = qs3;}
|
| - else /*ix >= 0x40000000*/ {p = qr2; q = qs2;}
|
| - z = 1.0/(x*x);
|
| - r = p[0]+z*(p[1]+z*(p[2]+z*(p[3]+z*(p[4]+z*p[5]))));
|
| - s = 1.0+z*(q[0]+z*(q[1]+z*(q[2]+z*(q[3]+z*(q[4]+z*q[5])))));
|
| - return (.375 + r/s)/x;
|
| + GET_HIGH_WORD(ix, x);
|
| + ix &= 0x7fffffff;
|
| + if (ix >= 0x40200000) {
|
| + p = qr8;
|
| + q = qs8;
|
| + } else if (ix >= 0x40122E8B) {
|
| + p = qr5;
|
| + q = qs5;
|
| + } else if (ix >= 0x4006DB6D) {
|
| + p = qr3;
|
| + q = qs3;
|
| + } else /*ix >= 0x40000000*/ {
|
| + p = qr2;
|
| + q = qs2;
|
| + }
|
| + z = 1.0 / (x * x);
|
| + r = p[0] + z * (p[1] + z * (p[2] + z * (p[3] + z * (p[4] + z * p[5]))));
|
| + s = 1.0 +
|
| + z * (q[0] + z * (q[1] + z * (q[2] + z * (q[3] + z * (q[4] + z * q[5])))));
|
| + return (.375 + r / s) / x;
|
| }
|
|
|