Check intermediate for not to be rounded value, tdf#138360 follow-up

This is a combination of 3 commits.

Add sal_uInt64 fields to sal_math_Double

We may need them later, and at least don't have a confusing
inf_parts or nan_parts struct name but just parts as well.

Ife0cf279c47d2815aa2a1483223397b147e9d776
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/107924
Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Jenkins

Replace log2() call with parts.exponent-1023, tdf#138360 follow-up

... to save some cycles as we anyway need only the integer value
of the exponent and even exactly this value for the number of
possible decimals.

I8d462f53cadde6a95d57d1342d8487fbfa001ae9
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/107928
Tested-by: Jenkins
Reviewed-by: Eike Rathke <erack@redhat.com>

Check intermediate for not to be rounded value, tdf#138360 follow-up

I98cc25267e7a10c34179bab50d19f49436e1c48c
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/107929
Tested-by: Jenkins
Reviewed-by: Eike Rathke <erack@redhat.com>

Change-Id: I98cc25267e7a10c34179bab50d19f49436e1c48c
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/107931
Tested-by: Jenkins
Reviewed-by: Eike Rathke <erack@redhat.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/include/sal/mathconf.h b/include/sal/mathconf.h
index 687f6e3da133..11bd32c35de0 100644
--- a/include/sal/mathconf.h
+++ b/include/sal/mathconf.h
@@ -104,6 +104,13 @@ union sal_math_Double
         unsigned msw          :32;
         unsigned lsw          :32;
     } w32_parts;
+    struct
+    {
+        sal_uInt64 sign       : 1;
+        sal_uInt64 exponent   :11;
+        sal_uInt64 fraction   :52;
+    } parts;
+    sal_uInt64 intrep;
     double value;
 };
 
@@ -130,6 +137,13 @@ union sal_math_Double
         unsigned lsw          :32;
         unsigned msw          :32;
     } w32_parts;
+    struct
+    {
+        sal_uInt64 fraction   :52;
+        sal_uInt64 exponent   :11;
+        sal_uInt64 sign       : 1;
+    } parts;
+    sal_uInt64 intrep;
     double value;
 };