Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(211)

Issues Search
    My Issues | Starred     Open | Closed | All

Unified Diff: third_party/fdlibm/fdlibm.cc

Issue 638553003: Move fdlibm in src/third_party. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: fix gn Created 6 years, 2 months ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View side-by-side diff with in-line comments
Download patch
« no previous file with comments | « third_party/fdlibm/fdlibm.h ('k') | third_party/fdlibm/fdlibm.js » ('j') | no next file with comments »
Expand Comments ('e') | Collapse Comments ('c') | Show Comments Hide Comments ('s')
Index: third_party/fdlibm/fdlibm.cc
diff --git a/third_party/fdlibm/fdlibm.cc b/third_party/fdlibm/fdlibm.cc
deleted file mode 100644
index c009cd0f6f494b005f06d4243e3a3620a0afd46e..0000000000000000000000000000000000000000
--- a/third_party/fdlibm/fdlibm.cc
+++ /dev/null
@@ -1,281 +0,0 @@
-// The following is adapted from fdlibm (http://www.netlib.org/fdlibm).
-//
-// ====================================================
-// Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
-//
-// Developed at SunSoft, a Sun Microsystems, Inc. business.
-// Permission to use, copy, modify, and distribute this
-// software is freely granted, provided that this notice
-// is preserved.
-// ====================================================
-//
-// The original source code covered by the above license above has been
-// modified significantly by Google Inc.
-// Copyright 2014 the V8 project authors. All rights reserved.
-
-#include "src/v8.h"
-
-#include "src/double.h"
-#include "third_party/fdlibm/fdlibm.h"
-
-
-namespace v8 {
-namespace fdlibm {
-
-#ifdef _MSC_VER
-inline double scalbn(double x, int y) { return _scalb(x, y); }
-#endif // _MSC_VER
-
-const double MathConstants::constants[] = {
- 6.36619772367581382433e-01, // invpio2 0
- 1.57079632673412561417e+00, // pio2_1 1
- 6.07710050650619224932e-11, // pio2_1t 2
- 6.07710050630396597660e-11, // pio2_2 3
- 2.02226624879595063154e-21, // pio2_2t 4
- 2.02226624871116645580e-21, // pio2_3 5
- 8.47842766036889956997e-32, // pio2_3t 6
- -1.66666666666666324348e-01, // S1 7 coefficients for sin
- 8.33333333332248946124e-03, // 8
- -1.98412698298579493134e-04, // 9
- 2.75573137070700676789e-06, // 10
- -2.50507602534068634195e-08, // 11
- 1.58969099521155010221e-10, // S6 12
- 4.16666666666666019037e-02, // C1 13 coefficients for cos
- -1.38888888888741095749e-03, // 14
- 2.48015872894767294178e-05, // 15
- -2.75573143513906633035e-07, // 16
- 2.08757232129817482790e-09, // 17
- -1.13596475577881948265e-11, // C6 18
- 3.33333333333334091986e-01, // T0 19 coefficients for tan
- 1.33333333333201242699e-01, // 20
- 5.39682539762260521377e-02, // 21
- 2.18694882948595424599e-02, // 22
- 8.86323982359930005737e-03, // 23
- 3.59207910759131235356e-03, // 24
- 1.45620945432529025516e-03, // 25
- 5.88041240820264096874e-04, // 26
- 2.46463134818469906812e-04, // 27
- 7.81794442939557092300e-05, // 28
- 7.14072491382608190305e-05, // 29
- -1.85586374855275456654e-05, // 30
- 2.59073051863633712884e-05, // T12 31
- 7.85398163397448278999e-01, // pio4 32
- 3.06161699786838301793e-17, // pio4lo 33
- 6.93147180369123816490e-01, // ln2_hi 34
- 1.90821492927058770002e-10, // ln2_lo 35
- 1.80143985094819840000e+16, // 2^54 36
- 6.666666666666666666e-01, // 2/3 37
- 6.666666666666735130e-01, // LP1 38 coefficients for log1p
- 3.999999999940941908e-01, // 39
- 2.857142874366239149e-01, // 40
- 2.222219843214978396e-01, // 41
- 1.818357216161805012e-01, // 42
- 1.531383769920937332e-01, // 43
- 1.479819860511658591e-01, // LP7 44
- 7.09782712893383973096e+02, // 45 overflow threshold for expm1
- 1.44269504088896338700e+00, // 1/ln2 46
- -3.33333333333331316428e-02, // Q1 47 coefficients for expm1
- 1.58730158725481460165e-03, // 48
- -7.93650757867487942473e-05, // 49
- 4.00821782732936239552e-06, // 50
- -2.01099218183624371326e-07, // Q5 51
- 710.4758600739439 // 52 overflow threshold sinh, cosh
-};
-
-
-// Table of constants for 2/pi, 396 Hex digits (476 decimal) of 2/pi
-static const int two_over_pi[] = {
- 0xA2F983, 0x6E4E44, 0x1529FC, 0x2757D1, 0xF534DD, 0xC0DB62, 0x95993C,
- 0x439041, 0xFE5163, 0xABDEBB, 0xC561B7, 0x246E3A, 0x424DD2, 0xE00649,
- 0x2EEA09, 0xD1921C, 0xFE1DEB, 0x1CB129, 0xA73EE8, 0x8235F5, 0x2EBB44,
- 0x84E99C, 0x7026B4, 0x5F7E41, 0x3991D6, 0x398353, 0x39F49C, 0x845F8B,
- 0xBDF928, 0x3B1FF8, 0x97FFDE, 0x05980F, 0xEF2F11, 0x8B5A0A, 0x6D1F6D,
- 0x367ECF, 0x27CB09, 0xB74F46, 0x3F669E, 0x5FEA2D, 0x7527BA, 0xC7EBE5,
- 0xF17B3D, 0x0739F7, 0x8A5292, 0xEA6BFB, 0x5FB11F, 0x8D5D08, 0x560330,
- 0x46FC7B, 0x6BABF0, 0xCFBC20, 0x9AF436, 0x1DA9E3, 0x91615E, 0xE61B08,
- 0x659985, 0x5F14A0, 0x68408D, 0xFFD880, 0x4D7327, 0x310606, 0x1556CA,
- 0x73A8C9, 0x60E27B, 0xC08C6B};
-
-static const double zero = 0.0;
-static const double two24 = 1.6777216e+07;
-static const double one = 1.0;
-static const double twon24 = 5.9604644775390625e-08;
-
-static const double PIo2[] = {
- 1.57079625129699707031e+00, // 0x3FF921FB, 0x40000000
- 7.54978941586159635335e-08, // 0x3E74442D, 0x00000000
- 5.39030252995776476554e-15, // 0x3CF84698, 0x80000000
- 3.28200341580791294123e-22, // 0x3B78CC51, 0x60000000
- 1.27065575308067607349e-29, // 0x39F01B83, 0x80000000
- 1.22933308981111328932e-36, // 0x387A2520, 0x40000000
- 2.73370053816464559624e-44, // 0x36E38222, 0x80000000
- 2.16741683877804819444e-51 // 0x3569F31D, 0x00000000
-};
-
-
-int __kernel_rem_pio2(double* x, double* y, int e0, int nx) {
- static const int32_t jk = 3;
- double fw;
- int32_t jx = nx - 1;
- int32_t jv = (e0 - 3) / 24;
- if (jv < 0) jv = 0;
- int32_t q0 = e0 - 24 * (jv + 1);
- int32_t m = jx + jk;
-
- double f[10];
- for (int i = 0, j = jv - jx; i <= m; i++, j++) {
- f[i] = (j < 0) ? zero : static_cast<double>(two_over_pi[j]);
- }
-
- double q[10];
- for (int i = 0; i <= jk; i++) {
- fw = 0.0;
- for (int j = 0; j <= jx; j++) fw += x[j] * f[jx + i - j];
- q[i] = fw;
- }
-
- int32_t jz = jk;
-
-recompute:
-
- int32_t iq[10];
- double z = q[jz];
- for (int i = 0, j = jz; j > 0; i++, j--) {
- fw = static_cast<double>(static_cast<int32_t>(twon24 * z));
- iq[i] = static_cast<int32_t>(z - two24 * fw);
- z = q[j - 1] + fw;
- }
-
- z = scalbn(z, q0);
- z -= 8.0 * std::floor(z * 0.125);
- int32_t n = static_cast<int32_t>(z);
- z -= static_cast<double>(n);
- int32_t ih = 0;
- if (q0 > 0) {
- int32_t i = (iq[jz - 1] >> (24 - q0));
- n += i;
- iq[jz - 1] -= i << (24 - q0);
- ih = iq[jz - 1] >> (23 - q0);
- } else if (q0 == 0) {
- ih = iq[jz - 1] >> 23;
- } else if (z >= 0.5) {
- ih = 2;
- }
-
- if (ih > 0) {
- n += 1;
- int32_t carry = 0;
- for (int i = 0; i < jz; i++) {
- int32_t j = iq[i];
- if (carry == 0) {
- if (j != 0) {
- carry = 1;
- iq[i] = 0x1000000 - j;
- }
- } else {
- iq[i] = 0xffffff - j;
- }
- }
- if (q0 == 1) {
- iq[jz - 1] &= 0x7fffff;
- } else if (q0 == 2) {
- iq[jz - 1] &= 0x3fffff;
- }
- if (ih == 2) {
- z = one - z;
- if (carry != 0) z -= scalbn(one, q0);
- }
- }
-
- if (z == zero) {
- int32_t j = 0;
- for (int i = jz - 1; i >= jk; i--) j |= iq[i];
- if (j == 0) {
- int32_t k = 1;
- while (iq[jk - k] == 0) k++;
- for (int i = jz + 1; i <= jz + k; i++) {
- f[jx + i] = static_cast<double>(two_over_pi[jv + i]);
- for (j = 0, fw = 0.0; j <= jx; j++) fw += x[j] * f[jx + i - j];
- q[i] = fw;
- }
- jz += k;
- goto recompute;
- }
- }
-
- if (z == 0.0) {
- jz -= 1;
- q0 -= 24;
- while (iq[jz] == 0) {
- jz--;
- q0 -= 24;
- }
- } else {
- z = scalbn(z, -q0);
- if (z >= two24) {
- fw = static_cast<double>(static_cast<int32_t>(twon24 * z));
- iq[jz] = static_cast<int32_t>(z - two24 * fw);
- jz += 1;
- q0 += 24;
- iq[jz] = static_cast<int32_t>(fw);
- } else {
- iq[jz] = static_cast<int32_t>(z);
- }
- }
-
- fw = scalbn(one, q0);
- for (int i = jz; i >= 0; i--) {
- q[i] = fw * static_cast<double>(iq[i]);
- fw *= twon24;
- }
-
- double fq[10];
- for (int i = jz; i >= 0; i--) {
- fw = 0.0;
- for (int k = 0; k <= jk && k <= jz - i; k++) fw += PIo2[k] * q[i + k];
- fq[jz - i] = fw;
- }
-
- fw = 0.0;
- for (int i = jz; i >= 0; i--) fw += fq[i];
- y[0] = (ih == 0) ? fw : -fw;
- fw = fq[0] - fw;
- for (int i = 1; i <= jz; i++) fw += fq[i];
- y[1] = (ih == 0) ? fw : -fw;
- return n & 7;
-}
-
-
-int rempio2(double x, double* y) {
- int32_t hx = static_cast<int32_t>(internal::double_to_uint64(x) >> 32);
- int32_t ix = hx & 0x7fffffff;
-
- if (ix >= 0x7ff00000) {
- *y = base::OS::nan_value();
- return 0;
- }
-
- int32_t e0 = (ix >> 20) - 1046;
- uint64_t zi = internal::double_to_uint64(x) & 0xFFFFFFFFu;
- zi |= static_cast<uint64_t>(ix - (e0 << 20)) << 32;
- double z = internal::uint64_to_double(zi);
-
- double tx[3];
- for (int i = 0; i < 2; i++) {
- tx[i] = static_cast<double>(static_cast<int32_t>(z));
- z = (z - tx[i]) * two24;
- }
- tx[2] = z;
-
- int nx = 3;
- while (tx[nx - 1] == zero) nx--;
- int n = __kernel_rem_pio2(tx, y, e0, nx);
- if (hx < 0) {
- y[0] = -y[0];
- y[1] = -y[1];
- return -n;
- }
- return n;
-}
-}
-} // namespace v8::internal
« no previous file with comments | « third_party/fdlibm/fdlibm.h ('k') | third_party/fdlibm/fdlibm.js » ('j') | no next file with comments »

Powered by Google App Engine
This is Rietveld 408576698