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* [Bug math/16503] New: [SH] wrong results on fma
@ 2014-01-25 2:12 kkojima at rr dot iij4u.or.jp
2014-01-25 2:14 ` [Bug math/16503] " kkojima at rr dot iij4u.or.jp
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: kkojima at rr dot iij4u.or.jp @ 2014-01-25 2:12 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16503
Bug ID: 16503
Summary: [SH] wrong results on fma
Product: glibc
Version: 2.19
Status: NEW
Severity: normal
Priority: P2
Component: math
Assignee: unassigned at sourceware dot org
Reporter: kkojima at rr dot iij4u.or.jp
fma produces wrong results on SH4. Here is the fma part of
libm-test-ulps:
# fma
Test "fma (-0x1.fffffffffffffp-711, 0x1.fffffffffffffp-275,
0x1.fffffe00007ffp-983)":
double: 1
idouble: 1
Test "fma (0x1.0000002p+0, 0x1.ffffffcp-1, -0x1p-300)":
double: 1
idouble: 1
Test "fma (0x1.153d650bb9f06p-907, 0x1.2d01230d48407p-125,
-0x0.b278d5acfc3cp-1022)":
double: 1
idouble: 1
Test "fma (0x1.4000004p-967, 0x1p-106, 0x0.000001p-1022)":
double: 1
idouble: 1
Test "fma (0x1.7ff8p+13, 0x1.000002p+0, 0x1.ffffp-24)":
float: 1
ifloat: 1
Test "fma (0x1.7fffff8p-968, 0x1p-106, 0x0.000001p-1022)":
double: 1
idouble: 1
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* [Bug math/16503] [SH] wrong results on fma
2014-01-25 2:12 [Bug math/16503] New: [SH] wrong results on fma kkojima at rr dot iij4u.or.jp
@ 2014-01-25 2:14 ` kkojima at rr dot iij4u.or.jp
2014-01-27 0:05 ` [Bug math/16503] [SH] wrong results on fma_towardzero kkojima at rr dot iij4u.or.jp
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: kkojima at rr dot iij4u.or.jp @ 2014-01-25 2:14 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16503
Kaz Kojima <kkojima at rr dot iij4u.or.jp> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |sh4-linux
Priority|P2 |P3
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* [Bug math/16503] [SH] wrong results on fma_towardzero
2014-01-25 2:12 [Bug math/16503] New: [SH] wrong results on fma kkojima at rr dot iij4u.or.jp
2014-01-25 2:14 ` [Bug math/16503] " kkojima at rr dot iij4u.or.jp
@ 2014-01-27 0:05 ` kkojima at rr dot iij4u.or.jp
2014-02-06 18:40 ` [Bug math/16503] [sh] " jsm28 at gcc dot gnu.org
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: kkojima at rr dot iij4u.or.jp @ 2014-01-27 0:05 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16503
Kaz Kojima <kkojima at rr dot iij4u.or.jp> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[SH] wrong results on fma |[SH] wrong results on
| |fma_towardzero
--- Comment #1 from Kaz Kojima <kkojima at rr dot iij4u.or.jp> ---
It turned out that these errors are bogus result without -mieee SH
gcc option which is required for proper IEEE arithmetic on this target.
Although the lines for fma went away with enabling -mieee, there are
new fma_towardzero lines:
# fma_towardzero
Test "fma_towardzero (-0x1.ffffffffffffcp-1022, 0x1.0000000000001p-1,
-0x1p-1074)":
double: 1
idouble: 1
Test "fma_towardzero (-0x1p-1074, 0x1.1p-1, -0x0.fffffffffffffp-1022)":
double: 1
idouble: 1
Test "fma_towardzero (0x1.ffffffffffffcp-1022, 0x1.0000000000001p-1,
0x1p-1074)":
double: 1
idouble: 1
Test "fma_towardzero (0x1p-1074, -0x1p-1074, 0x0.fffffffffffffp-1022)":
double: 1
idouble: 1
Test "fma_towardzero (0x1p-1074, -0x1p-1074, 0x1p-1022)":
double: 1
idouble: 1
Test "fma_towardzero (0x1p-1074, -0x1p-1074, 0x1p-1074)":
double: 1
idouble: 1
Test "fma_towardzero (0x1p-1074, -0x1p-1074, 0x1p1023)":
double: 1
idouble: 1
Test "fma_towardzero (0x1p-1074, 0x1.1p-1, 0x0.fffffffffffffp-1022)":
double: 1
idouble: 1
Test "fma_towardzero (0x1p-1074, 0x1p-1074, -0x0.fffffffffffffp-1022)":
double: 1
idouble: 1
Test "fma_towardzero (0x1p-1074, 0x1p-1074, -0x1p-1022)":
double: 1
idouble: 1
Test "fma_towardzero (0x1p-1074, 0x1p-1074, -0x1p-1074)":
double: 1
idouble: 1
Test "fma_towardzero (0x1p-1074, 0x1p-1074, -0x1p1023)":
double: 1
idouble: 1
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* [Bug math/16503] [sh] wrong results on fma_towardzero
2014-01-25 2:12 [Bug math/16503] New: [SH] wrong results on fma kkojima at rr dot iij4u.or.jp
2014-01-25 2:14 ` [Bug math/16503] " kkojima at rr dot iij4u.or.jp
2014-01-27 0:05 ` [Bug math/16503] [SH] wrong results on fma_towardzero kkojima at rr dot iij4u.or.jp
@ 2014-02-06 18:40 ` jsm28 at gcc dot gnu.org
2014-06-13 8:51 ` fweimer at redhat dot com
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2014-02-06 18:40 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16503
Joseph Myers <jsm28 at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Host| |sh4-*-*
Summary|[SH] wrong results on |[sh] wrong results on
|fma_towardzero |fma_towardzero
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* [Bug math/16503] [sh] wrong results on fma_towardzero
2014-01-25 2:12 [Bug math/16503] New: [SH] wrong results on fma kkojima at rr dot iij4u.or.jp
` (2 preceding siblings ...)
2014-02-06 18:40 ` [Bug math/16503] [sh] " jsm28 at gcc dot gnu.org
@ 2014-06-13 8:51 ` fweimer at redhat dot com
2014-06-20 22:58 ` olegendo at gcc dot gnu.org
2022-05-10 9:21 ` zimmerma+gcc at loria dot fr
5 siblings, 0 replies; 7+ messages in thread
From: fweimer at redhat dot com @ 2014-06-13 8:51 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16503
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Flags| |security-
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* [Bug math/16503] [sh] wrong results on fma_towardzero
2014-01-25 2:12 [Bug math/16503] New: [SH] wrong results on fma kkojima at rr dot iij4u.or.jp
` (3 preceding siblings ...)
2014-06-13 8:51 ` fweimer at redhat dot com
@ 2014-06-20 22:58 ` olegendo at gcc dot gnu.org
2022-05-10 9:21 ` zimmerma+gcc at loria dot fr
5 siblings, 0 replies; 7+ messages in thread
From: olegendo at gcc dot gnu.org @ 2014-06-20 22:58 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16503
Oleg Endo <olegendo at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |olegendo at gcc dot gnu.org
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* [Bug math/16503] [sh] wrong results on fma_towardzero
2014-01-25 2:12 [Bug math/16503] New: [SH] wrong results on fma kkojima at rr dot iij4u.or.jp
` (4 preceding siblings ...)
2014-06-20 22:58 ` olegendo at gcc dot gnu.org
@ 2022-05-10 9:21 ` zimmerma+gcc at loria dot fr
5 siblings, 0 replies; 7+ messages in thread
From: zimmerma+gcc at loria dot fr @ 2022-05-10 9:21 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=16503
Paul Zimmermann <zimmerma+gcc at loria dot fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |zimmerma+gcc at loria dot fr
--- Comment #2 from Paul Zimmermann <zimmerma+gcc at loria dot fr> ---
is that still the case now that #13304 is fixed?
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2014-01-25 2:12 [Bug math/16503] New: [SH] wrong results on fma kkojima at rr dot iij4u.or.jp
2014-01-25 2:14 ` [Bug math/16503] " kkojima at rr dot iij4u.or.jp
2014-01-27 0:05 ` [Bug math/16503] [SH] wrong results on fma_towardzero kkojima at rr dot iij4u.or.jp
2014-02-06 18:40 ` [Bug math/16503] [sh] " jsm28 at gcc dot gnu.org
2014-06-13 8:51 ` fweimer at redhat dot com
2014-06-20 22:58 ` olegendo at gcc dot gnu.org
2022-05-10 9:21 ` zimmerma+gcc at loria dot fr
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