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| author | Siddhesh Poyarekar <siddhesh@redhat.com> | 2013-03-26 19:28:50 +0530 |
|---|---|---|
| committer | Siddhesh Poyarekar <siddhesh@redhat.com> | 2013-03-26 19:28:50 +0530 |
| commit | 6f2e90e78f151bab153c2b38492505ae2012db06 (patch) | |
| tree | 03965f28878b90725ad89572ae61993bff4ebdfd /ChangeLog | |
| parent | fce14d4e9c6e08ad8c825fe88d8cbdac5c739565 (diff) | |
| download | glibc-6f2e90e78f151bab153c2b38492505ae2012db06.zip glibc-6f2e90e78f151bab153c2b38492505ae2012db06.tar.gz glibc-6f2e90e78f151bab153c2b38492505ae2012db06.tar.bz2 | |
Make mantissa type of mp_no configurable
The mantissa of mp_no is intended to take only integral values. This
is a relatively good choice for powerpc due to its 4 fpus, but not for
other architectures, which suffer due to this choice. This change
makes the default mantissa a long integer and allows powerpc to
override it. Additionally, some operations have been optimized for
integer manipulation, resulting in a significant improvement in
performance.
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 19 |
1 files changed, 19 insertions, 0 deletions
@@ -1,3 +1,22 @@ +2013-03-26 Siddhesh Poyarekar <siddhesh@redhat.com> + + * sysdeps/ieee754/dbl-64/mpa-arch.h: New file. + * sysdeps/ieee754/dbl-64/mpa.c (norm): Use MANTISSA_T and + MANTISSA_STORE_T to store computations on mantissa. Use + macros for rounding and division. + (denorm): Likewise. + (__dbl_mp): Likewise. + (add_magnitudes): Likewise. + (sub_magnitudes): Likewise. + (__mul): Likewise. + (__sqr): Likewise. + * sysdeps/ieee754/dbl-64/mpa.h: Include mpa-arch.h. Define + powers of two in terms of TWOPOW macro. + (mp_no): Make type of mantissa as MANTISSA_T. + [!RADIXI]: Define RADIXI. + [!TWO52]: Define TWO52. + * sysdeps/powerpc/power4/fpu/mpa-arch.h: New file. + 2013-03-25 Adhemerval Zanella <azanella@linux.vnet.ibm.com> * sysdeps/powerpc/fpu/s_llround.c: Fix libm ABI issue with missing |