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-rw-r--r--ChangeLog17
-rw-r--r--NEWS2
-rw-r--r--math/libm-test.inc4
-rw-r--r--sysdeps/i386/fpu/e_log.S8
-rw-r--r--sysdeps/i386/fpu/e_logf.S8
-rw-r--r--sysdeps/i386/fpu/e_logl.S8
-rw-r--r--sysdeps/i386/fpu/libm-test-ulps12
-rw-r--r--sysdeps/i386/i686/fpu/e_logl.S8
-rw-r--r--sysdeps/ieee754/dbl-64/e_log.c4
-rw-r--r--sysdeps/ieee754/ldbl-128/e_logl.c2
-rw-r--r--sysdeps/x86_64/fpu/e_logl.S8
-rw-r--r--sysdeps/x86_64/fpu/libm-test-ulps16
12 files changed, 88 insertions, 9 deletions
diff --git a/ChangeLog b/ChangeLog
index f8f87bd..e360149 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,20 @@
+2014-03-21 Joseph Myers <joseph@codesourcery.com>
+
+ [BZ #16731]
+ * sysdeps/i386/fpu/e_log.S (__ieee754_log): Take absolute value
+ when x - 1 is zero.
+ * sysdeps/i386/fpu/e_logf.S (__ieee754_logf): Likewise.
+ * sysdeps/i386/fpu/e_logl.S (__ieee754_logl): Likewise.
+ * sysdeps/i386/i686/fpu/e_logl.S (__ieee754_logl): Likewise.
+ * sysdeps/ieee754/dbl-64/e_log.c (__ieee754_log): Return +0 when
+ argument is 1.
+ * sysdeps/ieee754/ldbl-128/e_logl.c (__ieee754_logl): Likewise.
+ * sysdeps/x86_64/fpu/e_logl.S: Take absolute value when x - 1 is
+ zero.
+ * math/libm-test.inc (log_test): Use ALL_RM_TEST.
+ * sysdeps/i386/fpu/libm-test-ulps: Update.
+ * sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
+
2014-03-21 Siddhesh Poyarekar <siddhesh@redhat.com>
* scripts/bench.pl: Remove file.
diff --git a/NEWS b/NEWS
index 5f9ffcc..5df0277 100644
--- a/NEWS
+++ b/NEWS
@@ -11,7 +11,7 @@ Version 2.20
15347, 15804, 15894, 16447, 16532, 16545, 16574, 16600, 16609, 16610,
16611, 16613, 16623, 16632, 16639, 16642, 16649, 16670, 16674, 16677,
- 16680, 16683, 16689, 16695, 16701, 16706, 16707.
+ 16680, 16683, 16689, 16695, 16701, 16706, 16707, 16731.
* 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 7abc7c1..5e50f0e 100644
--- a/math/libm-test.inc
+++ b/math/libm-test.inc
@@ -7786,9 +7786,7 @@ static const struct test_f_f_data log_test_data[] =
static void
log_test (void)
{
- START (log, 0);
- RUN_TEST_LOOP_f_f (log, log_test_data, );
- END;
+ ALL_RM_TEST (log, 0, log_test_data, RUN_TEST_LOOP_f_f, END);
}
diff --git a/sysdeps/i386/fpu/e_log.S b/sysdeps/i386/fpu/e_log.S
index 0877924..3fa32aa 100644
--- a/sysdeps/i386/fpu/e_log.S
+++ b/sysdeps/i386/fpu/e_log.S
@@ -46,7 +46,13 @@ ENTRY(__ieee754_log)
fnstsw // x-1 : x : log(2)
andb $0x45, %ah
jz 2f
- fstp %st(1) // x-1 : log(2)
+ fxam
+ fnstsw
+ andb $0x45, %ah
+ cmpb $0x40, %ah
+ jne 5f
+ fabs // log(1) is +0 in all rounding modes.
+5: fstp %st(1) // x-1 : log(2)
fyl2xp1 // log(x)
ret
diff --git a/sysdeps/i386/fpu/e_logf.S b/sysdeps/i386/fpu/e_logf.S
index 485180e..ca83d39 100644
--- a/sysdeps/i386/fpu/e_logf.S
+++ b/sysdeps/i386/fpu/e_logf.S
@@ -47,7 +47,13 @@ ENTRY(__ieee754_logf)
fnstsw // x-1 : x : log(2)
andb $0x45, %ah
jz 2f
- fstp %st(1) // x-1 : log(2)
+ fxam
+ fnstsw
+ andb $0x45, %ah
+ cmpb $0x40, %ah
+ jne 5f
+ fabs // log(1) is +0 in all rounding modes.
+5: fstp %st(1) // x-1 : log(2)
fyl2xp1 // log(x)
ret
diff --git a/sysdeps/i386/fpu/e_logl.S b/sysdeps/i386/fpu/e_logl.S
index d7a459a..edae1d7 100644
--- a/sysdeps/i386/fpu/e_logl.S
+++ b/sysdeps/i386/fpu/e_logl.S
@@ -47,7 +47,13 @@ ENTRY(__ieee754_logl)
fnstsw // x-1 : x : log(2)
andb $0x45, %ah
jz 2f
- fstp %st(1) // x-1 : log(2)
+ fxam
+ fnstsw
+ andb $0x45, %ah
+ cmpb $0x40, %ah
+ jne 5f
+ fabs // log(1) is +0 in all rounding modes.
+5: fstp %st(1) // x-1 : log(2)
fyl2xp1 // log(x)
ret
diff --git a/sysdeps/i386/fpu/libm-test-ulps b/sysdeps/i386/fpu/libm-test-ulps
index 3be1806..b7b2e12 100644
--- a/sysdeps/i386/fpu/libm-test-ulps
+++ b/sysdeps/i386/fpu/libm-test-ulps
@@ -1096,6 +1096,18 @@ Function: "log1p":
ildouble: 1
ldouble: 1
+Function: "log_downward":
+ildouble: 1
+ldouble: 1
+
+Function: "log_towardzero":
+ildouble: 1
+ldouble: 1
+
+Function: "log_upward":
+ildouble: 1
+ldouble: 1
+
Function: "pow":
ildouble: 1
ldouble: 1
diff --git a/sysdeps/i386/i686/fpu/e_logl.S b/sysdeps/i386/i686/fpu/e_logl.S
index 8a86222..a0d1107 100644
--- a/sysdeps/i386/i686/fpu/e_logl.S
+++ b/sysdeps/i386/i686/fpu/e_logl.S
@@ -46,7 +46,13 @@ ENTRY(__ieee754_logl)
fcomip %st(1) // |x-1| : x-1 : x : log(2)
fstp %st(0) // x-1 : x : log(2)
jc 2f
- fstp %st(1) // x-1 : log(2)
+ fxam
+ fnstsw
+ andb $0x45, %ah
+ cmpb $0x40, %ah
+ jne 4f
+ fabs // log(1) is +0 in all rounding modes.
+4: fstp %st(1) // x-1 : log(2)
fyl2xp1 // log(x)
ret
diff --git a/sysdeps/ieee754/dbl-64/e_log.c b/sysdeps/ieee754/dbl-64/e_log.c
index 05d318b..4ecd372 100644
--- a/sysdeps/ieee754/dbl-64/e_log.c
+++ b/sysdeps/ieee754/dbl-64/e_log.c
@@ -96,6 +96,10 @@ __ieee754_log (double x)
if (__glibc_likely (ABS (w) > U03))
goto case_03;
+ /* log (1) is +0 in all rounding modes. */
+ if (w == 0.0)
+ return 0.0;
+
/*--- Stage I, the case abs(x-1) < 0.03 */
t8 = MHALF * w;
diff --git a/sysdeps/ieee754/ldbl-128/e_logl.c b/sysdeps/ieee754/ldbl-128/e_logl.c
index 3d1034d..cb43816 100644
--- a/sysdeps/ieee754/ldbl-128/e_logl.c
+++ b/sysdeps/ieee754/ldbl-128/e_logl.c
@@ -240,6 +240,8 @@ __ieee754_logl(long double x)
/* On this interval the table is not used due to cancellation error. */
if ((x <= 1.0078125L) && (x >= 0.9921875L))
{
+ if (x == 1.0L)
+ return 0.0L;
z = x - 1.0L;
k = 64;
t.value = 1.0L;
diff --git a/sysdeps/x86_64/fpu/e_logl.S b/sysdeps/x86_64/fpu/e_logl.S
index a8e3108..315afc0 100644
--- a/sysdeps/x86_64/fpu/e_logl.S
+++ b/sysdeps/x86_64/fpu/e_logl.S
@@ -45,7 +45,13 @@ ENTRY(__ieee754_logl)
fnstsw // x-1 : x : log(2)
andb $0x45, %ah
jz 2f
- fstp %st(1) // x-1 : log(2)
+ fxam
+ fnstsw
+ andb $0x45, %ah
+ cmpb $0x40, %ah
+ jne 5f
+ fabs // log(1) is +0 in all rounding modes.
+5: fstp %st(1) // x-1 : log(2)
fyl2xp1 // log(x)
ret
diff --git a/sysdeps/x86_64/fpu/libm-test-ulps b/sysdeps/x86_64/fpu/libm-test-ulps
index 5f4ab06..301eaa6 100644
--- a/sysdeps/x86_64/fpu/libm-test-ulps
+++ b/sysdeps/x86_64/fpu/libm-test-ulps
@@ -1170,6 +1170,22 @@ ifloat: 1
ildouble: 1
ldouble: 1
+Function: "log_downward":
+float: 1
+ifloat: 1
+ildouble: 1
+ldouble: 1
+
+Function: "log_towardzero":
+ildouble: 1
+ldouble: 1
+
+Function: "log_upward":
+float: 1
+ifloat: 1
+ildouble: 1
+ldouble: 1
+
Function: "pow":
float: 1
ifloat: 1
generated by cgit v1.1 at 2024-11-06 09:45:37 +0000