forked from rpms/glibc
74 lines
2.2 KiB
Diff
74 lines
2.2 KiB
Diff
diff -rup c/sysdeps/ieee754/dbl-64/slowexp.c d/sysdeps/ieee754/dbl-64/slowexp.c
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--- c/sysdeps/ieee754/dbl-64/slowexp.c 2013-06-04 16:40:55.000000000 +0530
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+++ d/sysdeps/ieee754/dbl-64/slowexp.c 2013-06-04 21:02:49.377439607 +0530
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@@ -29,6 +29,8 @@
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/**************************************************************************/
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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 USE_LONG_DOUBLE_FOR_MP
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# include "mpa.h"
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void __mpexp (mp_no *x, mp_no *y, int p);
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@@ -60,13 +62,22 @@ __slowexp (double x)
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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)
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- return w;
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+ {
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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
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{
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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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#else
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diff -rup c/sysdeps/ieee754/dbl-64/slowpow.c d/sysdeps/ieee754/dbl-64/slowpow.c
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--- c/sysdeps/ieee754/dbl-64/slowpow.c 2013-06-04 16:40:55.000000000 +0530
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+++ d/sysdeps/ieee754/dbl-64/slowpow.c 2013-06-04 21:05:21.776433149 +0530
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@@ -34,6 +34,8 @@
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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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@@ -97,7 +99,12 @@ __slowpow (double x, double y, double z)
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__sub (&mpp, &eps, &mpr1, p);
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__mp_dbl (&mpr1, &res1, p);
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if (res == res1)
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- return res;
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+ {
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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_p10, 4, &x, &y, &z, &res);
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+ return res;
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+ }
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/* If we don't, then we repeat using a higher precision. 768 bits of
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precision ought to be enough for anybody. */
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@@ -109,5 +116,10 @@ __slowpow (double x, double y, double z)
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__mul (&mpy, &mpz, &mpw, p);
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__mpexp (&mpw, &mpp, p);
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__mp_dbl (&mpp, &res, p);
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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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