aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--ChangeLog15
-rw-r--r--NEWS3
-rw-r--r--math/libm-test.inc8
-rw-r--r--math/s_clog.c9
-rw-r--r--math/s_clog10.c9
-rw-r--r--math/s_clog10f.c11
-rw-r--r--math/s_clog10l.c7
-rw-r--r--math/s_clogf.c9
-rw-r--r--math/s_clogl.c6
-rw-r--r--sysdeps/i386/fpu/libm-test-ulps96
-rw-r--r--sysdeps/x86_64/fpu/libm-test-ulps96
11 files changed, 233 insertions, 36 deletions
diff --git a/ChangeLog b/ChangeLog
index f623e8b..4a51456 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,18 @@
+2014-04-02 Joseph Myers <joseph@codesourcery.com>
+
+ [BZ #16789]
+ * math/s_clog.c (__clog): Use math_force_eval to ensure underflow
+ instead of using underflowing value in computing result.
+ * math/s_clog10.c (__clog10): Likewise.
+ * math/s_clog10f.c (__clog10f): Likewise.
+ * math/s_clog10l.c (__clog10l): Likewise.
+ * math/s_clogf.c (__clogf): Likewise.
+ * math/s_clogl.c (__clogl): Likewise.
+ * math/libm-test.inc (clog_test): Use ALL_RM_TEST.
+ (clog10_test): Likewise.
+ * sysdeps/i386/fpu/libm-test-ulps: Update.
+ * sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
+
2014-04-02 Alan Modra <amodra@gmail.com>
[BZ #16739]
diff --git a/NEWS b/NEWS
index d959fb3..63e9303 100644
--- a/NEWS
+++ b/NEWS
@@ -13,7 +13,8 @@ Version 2.20
16357, 16362, 16447, 16532, 16545, 16574, 16599, 16600, 16609, 16610,
16611, 16613, 16623, 16632, 16634, 16639, 16642, 16648, 16649, 16670,
16674, 16677, 16680, 16683, 16689, 16695, 16701, 16706, 16707, 16712,
- 16713, 16714, 16731, 16739, 16743, 16758, 16759, 16760, 16770, 16786.
+ 16713, 16714, 16731, 16739, 16743, 16758, 16759, 16760, 16770, 16786,
+ 16789.
* Running the testsuite no longer terminates as soon as a test fails.
Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
diff --git a/math/libm-test.inc b/math/libm-test.inc
index 967b679e..c6279e7 100644
--- a/math/libm-test.inc
+++ b/math/libm-test.inc
@@ -6122,9 +6122,7 @@ static const struct test_c_c_data clog_test_data[] =
static void
clog_test (void)
{
- START (clog, 0);
- RUN_TEST_LOOP_c_c (clog, clog_test_data, );
- END_COMPLEX;
+ ALL_RM_TEST (clog, 0, clog_test_data, RUN_TEST_LOOP_c_c, END_COMPLEX);
}
@@ -6184,9 +6182,7 @@ static const struct test_c_c_data clog10_test_data[] =
static void
clog10_test (void)
{
- START (clog10, 0);
- RUN_TEST_LOOP_c_c (clog10, clog10_test_data, );
- END_COMPLEX;
+ ALL_RM_TEST (clog10, 0, clog10_test_data, RUN_TEST_LOOP_c_c, END_COMPLEX);
}
diff --git a/math/s_clog.c b/math/s_clog.c
index 8639868..077f8f2 100644
--- a/math/s_clog.c
+++ b/math/s_clog.c
@@ -68,12 +68,9 @@ __clog (__complex__ double x)
double absy2 = absy * absy;
if (absy2 <= DBL_MIN * 2.0)
{
-#if __FLT_EVAL_METHOD__ == 0
- __real__ result = absy2 / 2.0 - absy2 * absy2 / 4.0;
-#else
- volatile double force_underflow = absy2 * absy2 / 4.0;
- __real__ result = absy2 / 2.0 - force_underflow;
-#endif
+ double force_underflow = absy2 * absy2;
+ __real__ result = absy2 / 2.0;
+ math_force_eval (force_underflow);
}
else
__real__ result = __log1p (absy2) / 2.0;
diff --git a/math/s_clog10.c b/math/s_clog10.c
index e757879..aa0537c 100644
--- a/math/s_clog10.c
+++ b/math/s_clog10.c
@@ -74,12 +74,9 @@ __clog10 (__complex__ double x)
double absy2 = absy * absy;
if (absy2 <= DBL_MIN * 2.0 * M_LN10)
{
-#if __FLT_EVAL_METHOD__ == 0
- __real__ result = (absy2 / 2.0 - absy2 * absy2 / 4.0) * M_LOG10E;
-#else
- volatile double force_underflow = absy2 * absy2 / 4.0;
- __real__ result = (absy2 / 2.0 - force_underflow) * M_LOG10E;
-#endif
+ double force_underflow = absy2 * absy2;
+ __real__ result = absy2 * (M_LOG10E / 2.0);
+ math_force_eval (force_underflow);
}
else
__real__ result = __log1p (absy2) * (M_LOG10E / 2.0);
diff --git a/math/s_clog10f.c b/math/s_clog10f.c
index ca2cdf4..3403b6c 100644
--- a/math/s_clog10f.c
+++ b/math/s_clog10f.c
@@ -74,14 +74,9 @@ __clog10f (__complex__ float x)
float absy2 = absy * absy;
if (absy2 <= FLT_MIN * 2.0f * (float) M_LN10)
{
-#if __FLT_EVAL_METHOD__ == 0
- __real__ result
- = (absy2 / 2.0f - absy2 * absy2 / 4.0f) * (float) M_LOG10E;
-#else
- volatile float force_underflow = absy2 * absy2 / 4.0f;
- __real__ result
- = (absy2 / 2.0f - force_underflow) * (float) M_LOG10E;
-#endif
+ float force_underflow = absy2 * absy2;
+ __real__ result = absy2 * ((float) M_LOG10E / 2.0f);
+ math_force_eval (force_underflow);
}
else
__real__ result = __log1pf (absy2) * ((float) M_LOG10E / 2.0f);
diff --git a/math/s_clog10l.c b/math/s_clog10l.c
index cdb5d61..fd86ecb 100644
--- a/math/s_clog10l.c
+++ b/math/s_clog10l.c
@@ -80,8 +80,11 @@ __clog10l (__complex__ long double x)
{
long double absy2 = absy * absy;
if (absy2 <= LDBL_MIN * 2.0L * M_LN10l)
- __real__ result
- = (absy2 / 2.0L - absy2 * absy2 / 4.0L) * M_LOG10El;
+ {
+ long double force_underflow = absy2 * absy2;
+ __real__ result = absy2 * (M_LOG10El / 2.0);
+ math_force_eval (force_underflow);
+ }
else
__real__ result = __log1pl (absy2) * (M_LOG10El / 2.0L);
}
diff --git a/math/s_clogf.c b/math/s_clogf.c
index 79117df..b487334 100644
--- a/math/s_clogf.c
+++ b/math/s_clogf.c
@@ -68,12 +68,9 @@ __clogf (__complex__ float x)
float absy2 = absy * absy;
if (absy2 <= FLT_MIN * 2.0f)
{
-#if __FLT_EVAL_METHOD__ == 0
- __real__ result = absy2 / 2.0f - absy2 * absy2 / 4.0f;
-#else
- volatile float force_underflow = absy2 * absy2 / 4.0f;
- __real__ result = absy2 / 2.0f - force_underflow;
-#endif
+ float force_underflow = absy2 * absy2;
+ __real__ result = absy2 / 2.0f;
+ math_force_eval (force_underflow);
}
else
__real__ result = __log1pf (absy2) / 2.0f;
diff --git a/math/s_clogl.c b/math/s_clogl.c
index bdf82c1..1b4a304 100644
--- a/math/s_clogl.c
+++ b/math/s_clogl.c
@@ -74,7 +74,11 @@ __clogl (__complex__ long double x)
{
long double absy2 = absy * absy;
if (absy2 <= LDBL_MIN * 2.0L)
- __real__ result = absy2 / 2.0L - absy2 * absy2 / 4.0L;
+ {
+ long double force_underflow = absy2 * absy2;
+ __real__ result = absy2 / 2.0L;
+ math_force_eval (force_underflow);
+ }
else
__real__ result = __log1pl (absy2) / 2.0L;
}
diff --git a/sysdeps/i386/fpu/libm-test-ulps b/sysdeps/i386/fpu/libm-test-ulps
index a82de19..0252d5b 100644
--- a/sysdeps/i386/fpu/libm-test-ulps
+++ b/sysdeps/i386/fpu/libm-test-ulps
@@ -593,6 +593,102 @@ ifloat: 1
ildouble: 2
ldouble: 2
+Function: Real part of "clog10_downward":
+double: 2
+float: 2
+idouble: 2
+ifloat: 2
+ildouble: 4
+ldouble: 4
+
+Function: Imaginary part of "clog10_downward":
+double: 2
+float: 2
+idouble: 2
+ifloat: 2
+ildouble: 2
+ldouble: 2
+
+Function: Real part of "clog10_towardzero":
+double: 2
+float: 1
+idouble: 2
+ifloat: 1
+ildouble: 4
+ldouble: 4
+
+Function: Imaginary part of "clog10_towardzero":
+double: 2
+float: 2
+idouble: 2
+ifloat: 2
+ildouble: 2
+ldouble: 2
+
+Function: Real part of "clog10_upward":
+double: 2
+float: 2
+idouble: 2
+ifloat: 2
+ildouble: 4
+ldouble: 4
+
+Function: Imaginary part of "clog10_upward":
+double: 2
+float: 2
+idouble: 2
+ifloat: 2
+ildouble: 2
+ldouble: 2
+
+Function: Real part of "clog_downward":
+double: 2
+float: 1
+idouble: 2
+ifloat: 1
+ildouble: 2
+ldouble: 2
+
+Function: Imaginary part of "clog_downward":
+double: 1
+float: 1
+idouble: 1
+ifloat: 1
+ildouble: 1
+ldouble: 1
+
+Function: Real part of "clog_towardzero":
+double: 2
+float: 1
+idouble: 2
+ifloat: 1
+ildouble: 2
+ldouble: 2
+
+Function: Imaginary part of "clog_towardzero":
+double: 1
+float: 1
+idouble: 1
+ifloat: 1
+ildouble: 1
+ldouble: 1
+
+Function: Real part of "clog_upward":
+double: 1
+float: 1
+idouble: 1
+ifloat: 1
+ildouble: 2
+ldouble: 2
+
+Function: Imaginary part of "clog_upward":
+double: 1
+float: 1
+idouble: 1
+ifloat: 1
+ildouble: 1
+ldouble: 1
+
Function: "cos":
ildouble: 1
ldouble: 1
diff --git a/sysdeps/x86_64/fpu/libm-test-ulps b/sysdeps/x86_64/fpu/libm-test-ulps
index e2fa9b2..1b6ebe2 100644
--- a/sysdeps/x86_64/fpu/libm-test-ulps
+++ b/sysdeps/x86_64/fpu/libm-test-ulps
@@ -624,6 +624,102 @@ ifloat: 1
ildouble: 2
ldouble: 2
+Function: Real part of "clog10_downward":
+double: 3
+float: 3
+idouble: 3
+ifloat: 3
+ildouble: 4
+ldouble: 4
+
+Function: Imaginary part of "clog10_downward":
+double: 3
+float: 2
+idouble: 3
+ifloat: 2
+ildouble: 2
+ldouble: 2
+
+Function: Real part of "clog10_towardzero":
+double: 3
+float: 2
+idouble: 3
+ifloat: 2
+ildouble: 4
+ldouble: 4
+
+Function: Imaginary part of "clog10_towardzero":
+double: 3
+float: 2
+idouble: 3
+ifloat: 2
+ildouble: 2
+ldouble: 2
+
+Function: Real part of "clog10_upward":
+double: 4
+float: 3
+idouble: 4
+ifloat: 3
+ildouble: 4
+ldouble: 4
+
+Function: Imaginary part of "clog10_upward":
+double: 2
+float: 2
+idouble: 2
+ifloat: 2
+ildouble: 2
+ldouble: 2
+
+Function: Real part of "clog_downward":
+double: 2
+float: 2
+idouble: 2
+ifloat: 2
+ildouble: 2
+ldouble: 2
+
+Function: Imaginary part of "clog_downward":
+double: 1
+float: 2
+idouble: 1
+ifloat: 2
+ildouble: 1
+ldouble: 1
+
+Function: Real part of "clog_towardzero":
+double: 2
+float: 2
+idouble: 2
+ifloat: 2
+ildouble: 2
+ldouble: 2
+
+Function: Imaginary part of "clog_towardzero":
+double: 1
+float: 2
+idouble: 1
+ifloat: 2
+ildouble: 1
+ldouble: 1
+
+Function: Real part of "clog_upward":
+double: 2
+float: 1
+idouble: 2
+ifloat: 1
+ildouble: 2
+ldouble: 2
+
+Function: Imaginary part of "clog_upward":
+double: 2
+float: 2
+idouble: 2
+ifloat: 2
+ildouble: 1
+ldouble: 1
+
Function: "cos":
ildouble: 1
ldouble: 1
generated by cgit v1.1 at 2024-12-25 18:05:38 +0000