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authorUlrich Drepper <drepper@redhat.com>2001-03-16 22:26:45 +0000
committerUlrich Drepper <drepper@redhat.com>2001-03-16 22:26:45 +0000
commita66f0958a1fbe5d64c3c77c01baee10bf23257dd (patch)
tree8bd667d88be5d0697fbcd2c01292b538abf5b91b /sysdeps
parentaeba9785a6e2e8dca120bb0b62b74ea1eda0a4a8 (diff)
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Update.
2001-03-16 Ulrich Drepper <drepper@redhat.com> * sysdeps/ieee754/ldbl-96/s_erfl.c: New file. Contributed by Stephen L. Moshier <moshier@na-net.ornl.gov>. * sysdeps/i386/fpu/libm-test-ulps: Adjust for addition of erfl and erfcl. * sysdeps/ia64/fpu/libm-test-ulps: Likewise. * sysdeps/unix/sysv/linux/ia64/swapcontext.c: New file.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/i386/fpu/libm-test-ulps11
-rw-r--r--sysdeps/ia64/fpu/libm-test-ulps8
-rw-r--r--sysdeps/ieee754/ldbl-96/s_erfl.c445
-rw-r--r--sysdeps/s390/s390-32/bits/huge_val.h73
-rw-r--r--sysdeps/s390/s390-32/ffs.c68
-rw-r--r--sysdeps/s390/s390-64/bits/huge_val.h69
-rw-r--r--sysdeps/s390/s390-64/ffs.c68
-rw-r--r--sysdeps/unix/sysv/linux/ia64/swapcontext.c40
8 files changed, 504 insertions, 278 deletions
diff --git a/sysdeps/i386/fpu/libm-test-ulps b/sysdeps/i386/fpu/libm-test-ulps
index 41d8d22665..1f14566a71 100644
--- a/sysdeps/i386/fpu/libm-test-ulps
+++ b/sysdeps/i386/fpu/libm-test-ulps
@@ -522,11 +522,15 @@ ldouble: 3074
Test "erfc (0.7) == 0.32219880616258152702":
double: 1
idouble: 1
+ldouble: 1
+ildouble: 1
Test "erfc (1.2) == 0.089686021770364619762":
float: 1
double: 1
idouble: 1
ifloat: 1
+ldouble: 3
+ildouble: 3
Test "erfc (2.0) == 0.0046777349810472658379":
double: 1
idouble: 1
@@ -535,6 +539,11 @@ double: 24
float: 12
idouble: 24
ifloat: 12
+ldouble: 4
+ildouble: 4
+Test "erfc (9) == 0.41370317465138102381e-36":
+ldouble: 36
+ildouble: 36
# exp
Test "exp (0.7) == 2.0137527074704765216":
@@ -1417,6 +1426,8 @@ double: 24
float: 12
idouble: 24
ifloat: 12
+ldouble: 36
+ildouble: 36
Function: "exp":
ildouble: 412
diff --git a/sysdeps/ia64/fpu/libm-test-ulps b/sysdeps/ia64/fpu/libm-test-ulps
index 383d4a7fcb..a79eefd615 100644
--- a/sysdeps/ia64/fpu/libm-test-ulps
+++ b/sysdeps/ia64/fpu/libm-test-ulps
@@ -566,11 +566,15 @@ ldouble: 3074
Test "erfc (0.7) == 0.32219880616258152702":
double: 1
idouble: 1
+ldouble: 1
+ildouble: 1
Test "erfc (1.2) == 0.089686021770364619762":
float: 2
double: 1
idouble: 1
ifloat: 2
+ldouble: 2
+ildouble: 2
Test "erfc (2.0) == 0.0046777349810472658379":
double: 1
idouble: 1
@@ -579,6 +583,8 @@ double: 24
float: 12
idouble: 24
ifloat: 12
+ldouble: 12
+ildouble: 12
# exp
Test "exp (0.7) == 2.0137527074704765216":
@@ -1487,6 +1493,8 @@ double: 24
float: 12
idouble: 24
ifloat: 12
+ldouble: 12
+ildouble: 12
Function: "exp":
ildouble: 412
diff --git a/sysdeps/ieee754/ldbl-96/s_erfl.c b/sysdeps/ieee754/ldbl-96/s_erfl.c
new file mode 100644
index 0000000000..69c0eb805c
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-96/s_erfl.c
@@ -0,0 +1,445 @@
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunPro, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice
+ * is preserved.
+ * ====================================================
+ */
+
+/* Long double expansions contributed by
+ Stephen L. Moshier <moshier@na-net.ornl.gov> */
+
+/* double erf(double x)
+ * double erfc(double x)
+ * x
+ * 2 |\
+ * erf(x) = --------- | exp(-t*t)dt
+ * sqrt(pi) \|
+ * 0
+ *
+ * erfc(x) = 1-erf(x)
+ * Note that
+ * erf(-x) = -erf(x)
+ * erfc(-x) = 2 - erfc(x)
+ *
+ * Method:
+ * 1. For |x| in [0, 0.84375]
+ * erf(x) = x + x*R(x^2)
+ * erfc(x) = 1 - erf(x) if x in [-.84375,0.25]
+ * = 0.5 + ((0.5-x)-x*R) if x in [0.25,0.84375]
+ * Remark. The formula is derived by noting
+ * erf(x) = (2/sqrt(pi))*(x - x^3/3 + x^5/10 - x^7/42 + ....)
+ * and that
+ * 2/sqrt(pi) = 1.128379167095512573896158903121545171688
+ * is close to one. The interval is chosen because the fix
+ * point of erf(x) is near 0.6174 (i.e., erf(x)=x when x is
+ * near 0.6174), and by some experiment, 0.84375 is chosen to
+ * guarantee the error is less than one ulp for erf.
+ *
+ * 2. For |x| in [0.84375,1.25], let s = |x| - 1, and
+ * c = 0.84506291151 rounded to single (24 bits)
+ * erf(x) = sign(x) * (c + P1(s)/Q1(s))
+ * erfc(x) = (1-c) - P1(s)/Q1(s) if x > 0
+ * 1+(c+P1(s)/Q1(s)) if x < 0
+ * Remark: here we use the taylor series expansion at x=1.
+ * erf(1+s) = erf(1) + s*Poly(s)
+ * = 0.845.. + P1(s)/Q1(s)
+ * Note that |P1/Q1|< 0.078 for x in [0.84375,1.25]
+ *
+ * 3. For x in [1.25,1/0.35(~2.857143)],
+ * erfc(x) = (1/x)*exp(-x*x-0.5625+R1(z)/S1(z))
+ * z=1/x^2
+ * erf(x) = 1 - erfc(x)
+ *
+ * 4. For x in [1/0.35,107]
+ * erfc(x) = (1/x)*exp(-x*x-0.5625+R2/S2) if x > 0
+ * = 2.0 - (1/x)*exp(-x*x-0.5625+R2(z)/S2(z))
+ * if -6.666<x<0
+ * = 2.0 - tiny (if x <= -6.666)
+ * z=1/x^2
+ * erf(x) = sign(x)*(1.0 - erfc(x)) if x < 6.666, else
+ * erf(x) = sign(x)*(1.0 - tiny)
+ * Note1:
+ * To compute exp(-x*x-0.5625+R/S), let s be a single
+ * precision number and s := x; then
+ * -x*x = -s*s + (s-x)*(s+x)
+ * exp(-x*x-0.5626+R/S) =
+ * exp(-s*s-0.5625)*exp((s-x)*(s+x)+R/S);
+ * Note2:
+ * Here 4 and 5 make use of the asymptotic series
+ * exp(-x*x)
+ * erfc(x) ~ ---------- * ( 1 + Poly(1/x^2) )
+ * x*sqrt(pi)
+ *
+ * 5. For inf > x >= 107
+ * erf(x) = sign(x) *(1 - tiny) (raise inexact)
+ * erfc(x) = tiny*tiny (raise underflow) if x > 0
+ * = 2 - tiny if x<0
+ *
+ * 7. Special case:
+ * erf(0) = 0, erf(inf) = 1, erf(-inf) = -1,
+ * erfc(0) = 1, erfc(inf) = 0, erfc(-inf) = 2,
+ * erfc/erf(NaN) is NaN
+ */
+
+
+#include "math.h"
+#include "math_private.h"
+
+#ifdef __STDC__
+static const long double
+#else
+static long double
+#endif
+tiny = 1e-4931L,
+ half = 0.5L,
+ one = 1.0L,
+ two = 2.0L,
+ /* c = (float)0.84506291151 */
+ erx = 0.845062911510467529296875L,
+/*
+ * Coefficients for approximation to erf on [0,0.84375]
+ */
+ /* 2/sqrt(pi) - 1 */
+ efx = 1.2837916709551257389615890312154517168810E-1L,
+ /* 8 * (2/sqrt(pi) - 1) */
+ efx8 = 1.0270333367641005911692712249723613735048E0L,
+
+ pp[6] = {
+ 1.122751350964552113068262337278335028553E6L,
+ -2.808533301997696164408397079650699163276E6L,
+ -3.314325479115357458197119660818768924100E5L,
+ -6.848684465326256109712135497895525446398E4L,
+ -2.657817695110739185591505062971929859314E3L,
+ -1.655310302737837556654146291646499062882E2L,
+ },
+
+ qq[6] = {
+ 8.745588372054466262548908189000448124232E6L,
+ 3.746038264792471129367533128637019611485E6L,
+ 7.066358783162407559861156173539693900031E5L,
+ 7.448928604824620999413120955705448117056E4L,
+ 4.511583986730994111992253980546131408924E3L,
+ 1.368902937933296323345610240009071254014E2L,
+ /* 1.000000000000000000000000000000000000000E0 */
+ },
+
+/*
+ * Coefficients for approximation to erf in [0.84375,1.25]
+ */
+/* erf(x+1) = 0.845062911510467529296875 + pa(x)/qa(x)
+ -0.15625 <= x <= +.25
+ Peak relative error 8.5e-22 */
+
+ pa[8] = {
+ -1.076952146179812072156734957705102256059E0L,
+ 1.884814957770385593365179835059971587220E2L,
+ -5.339153975012804282890066622962070115606E1L,
+ 4.435910679869176625928504532109635632618E1L,
+ 1.683219516032328828278557309642929135179E1L,
+ -2.360236618396952560064259585299045804293E0L,
+ 1.852230047861891953244413872297940938041E0L,
+ 9.394994446747752308256773044667843200719E-2L,
+ },
+
+ qa[7] = {
+ 4.559263722294508998149925774781887811255E2L,
+ 3.289248982200800575749795055149780689738E2L,
+ 2.846070965875643009598627918383314457912E2L,
+ 1.398715859064535039433275722017479994465E2L,
+ 6.060190733759793706299079050985358190726E1L,
+ 2.078695677795422351040502569964299664233E1L,
+ 4.641271134150895940966798357442234498546E0L,
+ /* 1.000000000000000000000000000000000000000E0 */
+ },
+
+/*
+ * Coefficients for approximation to erfc in [1.25,1/0.35]
+ */
+/* erfc(1/x) = x exp (-1/x^2 - 0.5625 + ra(x^2)/sa(x^2))
+ 1/2.85711669921875 < 1/x < 1/1.25
+ Peak relative error 3.1e-21 */
+
+ ra[] = {
+ 1.363566591833846324191000679620738857234E-1L,
+ 1.018203167219873573808450274314658434507E1L,
+ 1.862359362334248675526472871224778045594E2L,
+ 1.411622588180721285284945138667933330348E3L,
+ 5.088538459741511988784440103218342840478E3L,
+ 8.928251553922176506858267311750789273656E3L,
+ 7.264436000148052545243018622742770549982E3L,
+ 2.387492459664548651671894725748959751119E3L,
+ 2.220916652813908085449221282808458466556E2L,
+ },
+
+ sa[] = {
+ -1.382234625202480685182526402169222331847E1L,
+ -3.315638835627950255832519203687435946482E2L,
+ -2.949124863912936259747237164260785326692E3L,
+ -1.246622099070875940506391433635999693661E4L,
+ -2.673079795851665428695842853070996219632E4L,
+ -2.880269786660559337358397106518918220991E4L,
+ -1.450600228493968044773354186390390823713E4L,
+ -2.874539731125893533960680525192064277816E3L,
+ -1.402241261419067750237395034116942296027E2L,
+ /* 1.000000000000000000000000000000000000000E0 */
+ },
+/*
+ * Coefficients for approximation to erfc in [1/.35,107]
+ */
+/* erfc(1/x) = x exp (-1/x^2 - 0.5625 + rb(x^2)/sb(x^2))
+ 1/6.6666259765625 < 1/x < 1/2.85711669921875
+ Peak relative error 4.2e-22 */
+ rb[] = {
+ -4.869587348270494309550558460786501252369E-5L,
+ -4.030199390527997378549161722412466959403E-3L,
+ -9.434425866377037610206443566288917589122E-2L,
+ -9.319032754357658601200655161585539404155E-1L,
+ -4.273788174307459947350256581445442062291E0L,
+ -8.842289940696150508373541814064198259278E0L,
+ -7.069215249419887403187988144752613025255E0L,
+ -1.401228723639514787920274427443330704764E0L,
+ },
+
+ sb[] = {
+ 4.936254964107175160157544545879293019085E-3L,
+ 1.583457624037795744377163924895349412015E-1L,
+ 1.850647991850328356622940552450636420484E0L,
+ 9.927611557279019463768050710008450625415E0L,
+ 2.531667257649436709617165336779212114570E1L,
+ 2.869752886406743386458304052862814690045E1L,
+ 1.182059497870819562441683560749192539345E1L,
+ /* 1.000000000000000000000000000000000000000E0 */
+ },
+/* erfc(1/x) = x exp (-1/x^2 - 0.5625 + rc(x^2)/sc(x^2))
+ 1/107 <= 1/x <= 1/6.6666259765625
+ Peak relative error 1.1e-21 */
+ rc[] = {
+ -8.299617545269701963973537248996670806850E-5L,
+ -6.243845685115818513578933902532056244108E-3L,
+ -1.141667210620380223113693474478394397230E-1L,
+ -7.521343797212024245375240432734425789409E-1L,
+ -1.765321928311155824664963633786967602934E0L,
+ -1.029403473103215800456761180695263439188E0L,
+ },
+
+ sc[] = {
+ 8.413244363014929493035952542677768808601E-3L,
+ 2.065114333816877479753334599639158060979E-1L,
+ 1.639064941530797583766364412782135680148E0L,
+ 4.936788463787115555582319302981666347450E0L,
+ 5.005177727208955487404729933261347679090E0L,
+ /* 1.000000000000000000000000000000000000000E0 */
+ };
+
+#ifdef __STDC__
+long double
+__erfl (long double x)
+#else
+double
+__erfl (x)
+ long double x;
+#endif
+{
+ long double R, S, P, Q, s, y, z, r;
+ int32_t ix, i;
+ u_int32_t se, i0, i1;
+
+ GET_LDOUBLE_WORDS (se, i0, i1, x);
+ ix = se & 0x7fff;
+
+ if (ix >= 0x7fff)
+ { /* erf(nan)=nan */
+ i = ((se & 0xffff) >> 15) << 1;
+ return (long double) (1 - i) + one / x; /* erf(+-inf)=+-1 */
+ }
+
+ ix = (ix << 16) | (i0 >> 16);
+ if (ix < 0x3ffed800) /* |x|<0.84375 */
+ {
+ if (ix < 0x3fde8000) /* |x|<2**-33 */
+ {
+ if (ix < 0x00080000)
+ return 0.125 * (8.0 * x + efx8 * x); /*avoid underflow */
+ return x + efx * x;
+ }
+ z = x * x;
+ r = pp[0] + z * (pp[1]
+ + z * (pp[2] + z * (pp[3] + z * (pp[4] + z * pp[5]))));
+ s = qq[0] + z * (qq[1]
+ + z * (qq[2] + z * (qq[3] + z * (qq[4] + z * (qq[5] + z)))));
+ y = r / s;
+ return x + x * y;
+ }
+ if (ix < 0x3fffa000) /* 1.25 */
+ { /* 0.84375 <= |x| < 1.25 */
+ s = fabsl (x) - one;
+ P = pa[0] + s * (pa[1] + s * (pa[2]
+ + s * (pa[3] + s * (pa[4] + s * (pa[5] + s * (pa[6] + s * pa[7]))))));
+ Q = qa[0] + s * (qa[1] + s * (qa[2]
+ + s * (qa[3] + s * (qa[4] + s * (qa[5] + s * (qa[6] + s))))));
+ if ((se & 0x8000) == 0)
+ return erx + P / Q;
+ else
+ return -erx - P / Q;
+ }
+ if (ix >= 0x4001d555) /* 6.6666259765625 */
+ { /* inf>|x|>=6.666 */
+ if ((se & 0x8000) == 0)
+ return one - tiny;
+ else
+ return tiny - one;
+ }
+ x = fabsl (x);
+ s = one / (x * x);
+ if (ix < 0x4000b6db) /* 2.85711669921875 */
+ {
+ R = ra[0] + s * (ra[1] + s * (ra[2] + s * (ra[3] + s * (ra[4] +
+ s * (ra[5] + s * (ra[6] + s * (ra[7] + s * ra[8])))))));
+ S = sa[0] + s * (sa[1] + s * (sa[2] + s * (sa[3] + s * (sa[4] +
+ s * (sa[5] + s * (sa[6] + s * (sa[7] + s * (sa[8] + s))))))));
+ }
+ else
+ { /* |x| >= 1/0.35 */
+ R = rb[0] + s * (rb[1] + s * (rb[2] + s * (rb[3] + s * (rb[4] +
+ s * (rb[5] + s * (rb[6] + s * rb[7]))))));
+ S = sb[0] + s * (sb[1] + s * (sb[2] + s * (sb[3] + s * (sb[4] +
+ s * (sb[5] + s * (sb[6] + s))))));
+ }
+ z = x;
+ GET_LDOUBLE_WORDS (i, i0, i1, z);
+ i1 = 0;
+ SET_LDOUBLE_WORDS (z, i, i0, i1);
+ r =
+ __ieee754_expl (-z * z - 0.5625) * __ieee754_expl ((z - x) * (z + x) +
+ R / S);
+ if ((se & 0x8000) == 0)
+ return one - r / x;
+ else
+ return r / x - one;
+}
+
+weak_alias (__erfl, erfl)
+#ifdef NO_LONG_DOUBLE
+strong_alias (__erf, __erfl)
+weak_alias (__erf, erfl)
+#endif
+#ifdef __STDC__
+ long double
+ __erfcl (long double x)
+#else
+ long double
+ __erfcl (x)
+ double
+ x;
+#endif
+{
+ int32_t hx, ix;
+ long double R, S, P, Q, s, y, z, r;
+ u_int32_t se, i0, i1;
+
+ GET_LDOUBLE_WORDS (se, i0, i1, x);
+ ix = se & 0x7fff;
+ if (ix >= 0x7fff)
+ { /* erfc(nan)=nan */
+ /* erfc(+-inf)=0,2 */
+ return (long double) (((se & 0xffff) >> 15) << 1) + one / x;
+ }
+
+ ix = (ix << 16) | (i0 >> 16);
+ if (ix < 0x3ffed800) /* |x|<0.84375 */
+ {
+ if (ix < 0x3fbe0000) /* |x|<2**-65 */
+ return one - x;
+ z = x * x;
+ r = pp[0] + z * (pp[1]
+ + z * (pp[2] + z * (pp[3] + z * (pp[4] + z * pp[5]))));
+ s = qq[0] + z * (qq[1]
+ + z * (qq[2] + z * (qq[3] + z * (qq[4] + z * (qq[5] + z)))));
+ y = r / s;
+ if (ix < 0x3ffd8000) /* x<1/4 */
+ {
+ return one - (x + x * y);
+ }
+ else
+ {
+ r = x * y;
+ r += (x - half);
+ return half - r;
+ }
+ }
+ if (ix < 0x3fffa000) /* 1.25 */
+ { /* 0.84375 <= |x| < 1.25 */
+ s = fabsl (x) - one;
+ P = pa[0] + s * (pa[1] + s * (pa[2]
+ + s * (pa[3] + s * (pa[4] + s * (pa[5] + s * (pa[6] + s * pa[7]))))));
+ Q = qa[0] + s * (qa[1] + s * (qa[2]
+ + s * (qa[3] + s * (qa[4] + s * (qa[5] + s * (qa[6] + s))))));
+ if ((se & 0x8000) == 0)
+ {
+ z = one - erx;
+ return z - P / Q;
+ }
+ else
+ {
+ z = erx + P / Q;
+ return one + z;
+ }
+ }
+ if (ix < 0x4005d600) /* 107 */
+ { /* |x|<107 */
+ x = fabsl (x);
+ s = one / (x * x);
+ if (ix < 0x4000b6db) /* 2.85711669921875 */
+ { /* |x| < 1/.35 ~ 2.857143 */
+ R = ra[0] + s * (ra[1] + s * (ra[2] + s * (ra[3] + s * (ra[4] +
+ s * (ra[5] + s * (ra[6] + s * (ra[7] + s * ra[8])))))));
+ S = sa[0] + s * (sa[1] + s * (sa[2] + s * (sa[3] + s * (sa[4] +
+ s * (sa[5] + s * (sa[6] + s * (sa[7] + s * (sa[8] + s))))))));
+ }
+ else if (ix < 0x4001d555) /* 6.6666259765625 */
+ { /* 6.666 > |x| >= 1/.35 ~ 2.857143 */
+ R = rb[0] + s * (rb[1] + s * (rb[2] + s * (rb[3] + s * (rb[4] +
+ s * (rb[5] + s * (rb[6] + s * rb[7]))))));
+ S = sb[0] + s * (sb[1] + s * (sb[2] + s * (sb[3] + s * (sb[4] +
+ s * (sb[5] + s * (sb[6] + s))))));
+ }
+ else
+ { /* |x| >= 6.666 */
+ if (se & 0x8000)
+ return two - tiny; /* x < -6.666 */
+
+ R = rc[0] + s * (rc[1] + s * (rc[2] + s * (rc[3] +
+ s * (rc[4] + s * rc[5]))));
+ S = sc[0] + s * (sc[1] + s * (sc[2] + s * (sc[3] +
+ s * (sc[4] + s))));
+ }
+ z = x;
+ GET_LDOUBLE_WORDS (hx, i0, i1, z);
+ i1 = 0;
+ i0 &= 0xffffff00;
+ SET_LDOUBLE_WORDS (z, hx, i0, i1);
+ r = __ieee754_expl (-z * z - 0.5625) *
+ __ieee754_expl ((z - x) * (z + x) + R / S);
+ if ((se & 0x8000) == 0)
+ return r / x;
+ else
+ return two - r / x;
+ }
+ else
+ {
+ if ((se & 0x8000) == 0)
+ return tiny * tiny;
+ else
+ return two - tiny;
+ }
+}
+
+weak_alias (__erfcl, erfcl)
+#ifdef NO_LONG_DOUBLE
+strong_alias (__erfc, __erfcl)
+weak_alias (__erfc, erfcl)
+#endif
diff --git a/sysdeps/s390/s390-32/bits/huge_val.h b/sysdeps/s390/s390-32/bits/huge_val.h
deleted file mode 100644
index 65e0fe2487..0000000000
--- a/sysdeps/s390/s390-32/bits/huge_val.h
+++ /dev/null
@@ -1,73 +0,0 @@
-/* `HUGE_VAL' constants for s390 (where it is infinity).
- Used by <stdlib.h> and <math.h> functions for overflow.
- Copyright (C) 2000, 2001 Free Software Foundation, Inc.
- Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
-#ifndef _MATH_H
-# error "Never use <bits/huge_val.h> directly; include <math.h> instead."
-#endif
-
-#include <features.h>
-
-/* IEEE positive infinity (-HUGE_VAL is negative infinity). */
-
-#if __GNUC_PREREQ(2,96)
-# define HUGE_VAL (__extension__ 0x1.0p2047)
-#else
-#define __HUGE_VAL_bytes { 0x7f, 0xf0, 0, 0, 0, 0, 0, 0 }
-
-#define __huge_val_t union { unsigned char __c[8]; double __d; }
-#ifdef __GNUC__
-# define HUGE_VAL (__extension__ \
- ((__huge_val_t) { __c: __HUGE_VAL_bytes }).__d)
-#else /* Not GCC. */
-static __huge_val_t __huge_val = { __HUGE_VAL_bytes };
-# define HUGE_VAL (__huge_val.__d)
-#endif /* GCC. */
-#endif /* GCC 2.95 */
-
-
-/* ISO C 99 extensions: (float) HUGE_VALF and (long double) HUGE_VALL. */
-
-#ifdef __USE_ISOC99
-
-# if __GNUC_PREREQ(2,96)
-
-# define HUGE_VALF (__extension__ 0x1.0p255f)
-# define HUGE_VALL (__extension__ 0x1.0p255f)
-
-# else
-
-# define __HUGE_VALF_bytes { 0x7f, 0x80, 0, 0 }
-
-# define __huge_valf_t union { unsigned char __c[4]; float __f; }
-# ifdef __GNUC__
-# define HUGE_VALF (__extension__ \
- ((__huge_valf_t) { __c: __HUGE_VALF_bytes }).__f)
-# else /* Not GCC. */
-static __huge_valf_t __huge_valf = { __HUGE_VALF_bytes };
-# define HUGE_VALF (__huge_valf.__f)
-# endif /* GCC. */
-
-/* On 390 there is no 'long double' format. Make it the same as 'double' */
-# define HUGE_VALL HUGE_VAL
-
-# endif /* GCC 2.95 */
-
-#endif /* __USE_ISOC99. */
diff --git a/sysdeps/s390/s390-32/ffs.c b/sysdeps/s390/s390-32/ffs.c
deleted file mode 100644
index 12f265d7b2..0000000000
--- a/sysdeps/s390/s390-32/ffs.c
+++ /dev/null
@@ -1,68 +0,0 @@
-/* ffs -- find first set bit in a word, counted from least significant end.
- This file is part of the GNU C Library.
- Copyright (C) 2000, 2001 Free Software Foundation, Inc.
- Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
-#define ffsl __something_else
-#include <string.h>
-
-#undef ffs
-
-/*
- * ffs: find first bit set. This is defined the same way as
- * the libc and compiler builtin ffs routines, therefore
- * differs in spirit from the above ffz (man ffs).
- */
-
-int
-__ffs (x)
- int x;
-{
- int r;
-
- if (x == 0)
- return 0;
- __asm__(" lr %%r1,%1\n"
- " sr %0,%0\n"
- " tml %%r1,0xFFFF\n"
- " jnz 0f\n"
- " ahi %0,16\n"
- " srl %%r1,16\n"
- "0: tml %%r1,0x00FF\n"
- " jnz 1f\n"
- " ahi %0,8\n"
- " srl %%r1,8\n"
- "1: tml %%r1,0x000F\n"
- " jnz 2f\n"
- " ahi %0,4\n"
- " srl %%r1,4\n"
- "2: tml %%r1,0x0003\n"
- " jnz 3f\n"
- " ahi %0,2\n"
- " srl %%r1,2\n"
- "3: tml %%r1,0x0001\n"
- " jnz 4f\n"
- " ahi %0,1\n"
- "4:"
- : "=&d" (r) : "d" (x) : "cc", "1" );
- return r+1;
-}
-
-weak_alias (__ffs, ffs)
-#undef ffsl
-weak_alias (__ffs, ffsl)
diff --git a/sysdeps/s390/s390-64/bits/huge_val.h b/sysdeps/s390/s390-64/bits/huge_val.h
deleted file mode 100644
index f6fd431953..0000000000
--- a/sysdeps/s390/s390-64/bits/huge_val.h
+++ /dev/null
@@ -1,69 +0,0 @@
-/* `HUGE_VAL' constants for 64 bit S/390 (where it is infinity).
- Used by <stdlib.h> and <math.h> functions for overflow.
- Copyright (C) 2001 Free Software Foundation, Inc.
- Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
-#ifndef _MATH_H
-# error "Never use <bits/huge_val.h> directly; include <math.h> instead."
-#endif
-
-#include <features.h>
-
-/* IEEE positive infinity (-HUGE_VAL is negative infinity). */
-
-#if __GNUC_PREREQ(2,96)
-# define HUGE_VAL (__extension__ 0x1.0p2047)
-#else
-# define __HUGE_VAL_bytes { 0x7f, 0xf0, 0, 0, 0, 0, 0, 0 }
-
-# define __huge_val_t union { unsigned char __c[8]; double __d; }
-# ifdef __GNUC__
-# define HUGE_VAL (__extension__ \
- ((__huge_val_t) { __c: __HUGE_VAL_bytes }).__d)
-# else /* Not GCC. */
-static __huge_val_t __huge_val = { __HUGE_VAL_bytes };
-# define HUGE_VAL (__huge_val.__d)
-# endif /* GCC. */
-#endif /* GCC 2.95 */
-
-
-/* ISO C 99 extensions: (float) HUGE_VALF and (long double) HUGE_VALL. */
-
-#ifdef __USE_ISOC99
-
-# if __GNUC_PREREQ(2,96)
-# define HUGE_VALF (__extension__ 0x1.0p255f)
-# define HUGE_VALL (__extension__ 0x1.0p255f)
-# else
-# define __HUGE_VALF_bytes { 0x7f, 0x80, 0, 0 }
-# define __huge_valf_t union { unsigned char __c[4]; float __f; }
-# ifdef __GNUC__
-# define HUGE_VALF (__extension__ \
- ((__huge_valf_t) { __c: __HUGE_VALF_bytes }).__f)
-# else /* Not GCC. */
-static __huge_valf_t __huge_valf = { __HUGE_VALF_bytes };
-# define HUGE_VALF (__huge_valf.__f)
-# endif /* GCC. */
-
-/* On 390 there is no 'long double' format. Make it the same as 'double' */
-# define HUGE_VALL HUGE_VAL
-
-# endif /* GCC 2.95 */
-
-#endif /* __USE_ISOC99. */
diff --git a/sysdeps/s390/s390-64/ffs.c b/sysdeps/s390/s390-64/ffs.c
deleted file mode 100644
index 64e0d8911e..0000000000
--- a/sysdeps/s390/s390-64/ffs.c
+++ /dev/null
@@ -1,68 +0,0 @@
-/* ffs -- find first set bit in a word, counted from least significant end.
- 64 bit S/390 version.
- Copyright (C) 2001 Free Software Foundation, Inc.
- Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
-#define ffsl __something_else
-#include <string.h>
-
-#undef ffs
-
-/* ffs: find first bit set. This is defined the same way as
- the libc and compiler builtin ffs routines, therefore
- differs in spirit from the above ffz (man ffs). */
-
-int
-__ffs (x)
- int x;
-{
- int r;
-
- if (x == 0)
- return 0;
- __asm__(" lr %%r1,%1\n"
- " sr %0,%0\n"
- " tml %%r1,0xFFFF\n"
- " jnz 0f\n"
- " ahi %0,16\n"
- " srl %%r1,16\n"
- "0: tml %%r1,0x00FF\n"
- " jnz 1f\n"
- " ahi %0,8\n"
- " srl %%r1,8\n"
- "1: tml %%r1,0x000F\n"
- " jnz 2f\n"
- " ahi %0,4\n"
- " srl %%r1,4\n"
- "2: tml %%r1,0x0003\n"
- " jnz 3f\n"
- " ahi %0,2\n"
- " srl %%r1,2\n"
- "3: tml %%r1,0x0001\n"
- " jnz 4f\n"
- " ahi %0,1\n"
- "4:"
- : "=&d" (r) : "d" (x) : "cc", "1" );
- return r+1;
-}
-
-weak_alias (__ffs, ffs)
-#undef ffsl
-weak_alias (__ffs, ffsl)
-
diff --git a/sysdeps/unix/sysv/linux/ia64/swapcontext.c b/sysdeps/unix/sysv/linux/ia64/swapcontext.c
new file mode 100644
index 0000000000..1775cd5300
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/ia64/swapcontext.c
@@ -0,0 +1,40 @@
+/* Copyright (C) 2001 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by David Mosberger-Tang <davidm@hpl.hp.com>.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <ucontext.h>
+
+struct rv
+ {
+ long retval;
+ long first_return;
+ };
+
+extern struct rv __getcontext (ucontext_t *__ucp) __THROW;
+extern int __setcontext (__const ucontext_t *__ucp) __THROW;
+
+int
+__swapcontext (ucontext_t *oucp, const ucontext_t *ucp)
+{
+ struct rv rv = __getcontext (oucp);
+ if (rv.first_return)
+ __setcontext (ucp);
+ return 0;
+}
+
+weak_alias (__swapcontext, swapcontext)