forked from rpms/glibc
73 lines
2.3 KiB
Diff
73 lines
2.3 KiB
Diff
diff -rup a/sysdeps/ieee754/dbl-64/slowexp.c b/sysdeps/ieee754/dbl-64/slowexp.c
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--- a/sysdeps/ieee754/dbl-64/slowexp.c 2012-01-01 05:16:32.000000000 -0700
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+++ b/sysdeps/ieee754/dbl-64/slowexp.c 2012-03-13 11:57:51.225330782 -0600
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@@ -31,6 +31,8 @@
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#include "mpa.h"
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#include "math_private.h"
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+#include <stap-probe.h>
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+
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#ifndef SECTION
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# define SECTION
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#endif
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@@ -61,12 +63,21 @@ __slowexp(double x) {
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__sub(&mpy,&mpcor,&mpz,p);
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__mp_dbl(&mpw, &w, p);
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__mp_dbl(&mpz, &z, p);
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- if (w == z) return w;
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+ if (w == z) {
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+ /* Track how often we get to the slow exp code plus
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+ its input/output values. */
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+ LIBC_PROBE (slowexp_p6, 2, &x, &w);
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+ return w;
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+ }
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else { /* if calculating is not exactly */
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p = 32;
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__dbl_mp(x,&mpx,p);
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__mpexp(&mpx, &mpy, p);
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__mp_dbl(&mpy, &res, p);
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+
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+ /* Track how often we get to the uber-slow exp code plus
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+ its input/output values. */
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+ LIBC_PROBE (slowexp_p32, 2, &x, &res);
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return res;
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}
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}
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diff -rup a/sysdeps/ieee754/dbl-64/slowpow.c b/sysdeps/ieee754/dbl-64/slowpow.c
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--- a/sysdeps/ieee754/dbl-64/slowpow.c 2012-01-01 05:16:32.000000000 -0700
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+++ b/sysdeps/ieee754/dbl-64/slowpow.c 2012-03-13 11:57:59.865284437 -0600
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@@ -35,6 +35,8 @@
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#include "mpa.h"
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#include "math_private.h"
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+#include <stap-probe.h>
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+
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#ifndef SECTION
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# define SECTION
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#endif
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@@ -66,7 +68,12 @@ __slowpow(double x, double y, double z)
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__mp_dbl(&mpr, &res, p);
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__sub(&mpp,&eps,&mpr1,p); /* pp -eps =r1 */
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__mp_dbl(&mpr1, &res1, p); /* converting into double precision */
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- if (res == res1) return res;
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+ if (res == res1) {
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+ /* Track how often we get to the slow pow code plus
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+ its input/output values. */
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+ LIBC_PROBE (slowpow_p6, 4, &x, &y, &z, &res);
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+ return res;
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+ }
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p = 32; /* if we get here result wasn't calculated exactly, continue */
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__dbl_mp(x,&mpx,p); /* for more exact calculation */
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@@ -76,5 +83,10 @@ __slowpow(double x, double y, double z)
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__mul(&mpy,&mpz,&mpw,p); /* y*z =w */
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__mpexp(&mpw, &mpp, p); /* e^w=pp */
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__mp_dbl(&mpp, &res, p); /* converting into double precision */
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+
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+ /* Track how often we get to the uber-slow pow code plus
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+ its input/output values. */
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+ LIBC_PROBE (slowpow_p32, 4, &x, &y, &z, &res);
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+
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return res;
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}
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