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| author | Ulrich Drepper <drepper@redhat.com> | 1998-05-06 14:43:15 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 1998-05-06 14:43:15 +0000 |
| commit | 6600049466b586e3decaf24bd70c06b21382cf98 (patch) | |
| tree | 536fc5c8efe78035527223283bcd5a48ac259576 /sysdeps/libm-ieee754/s_exp2f.c | |
| parent | b22fc5f5651706304ac09305ac3ee5bf84516378 (diff) | |
| download | glibc-6600049466b586e3decaf24bd70c06b21382cf98.tar.gz glibc-6600049466b586e3decaf24bd70c06b21382cf98.tar.xz glibc-6600049466b586e3decaf24bd70c06b21382cf98.zip | |
Update.
1998-04-16 07:42 Geoff Keating <geoffk@ozemail.com.au> * Makeconfig [!build-static]: Link `static' binaries with libc_pic.a. Still need *FLAGS-.o because we still sometimes build .o files. * db2/Makefile: Don't build libndbm.a if !build-static. 1998-04-16 07:42 Geoff Keating <geoffk@ozemail.com.au> * configure.in: New test for broken gcc on PowerPC. * sysdeps/powerpc/atomicity.h: Use result of test. * linuxthreads/sysdeps/powerpc/pt-machine.h: Use result of test. * math/libm-test.c: Update many of the epsilon to match actual performance. * sysdeps/libm-ieee754/e_exp.c: Reduce the number of branches. * sysdeps/libm-ieee754/e_expf.c: Likewise. * sysdeps/libm-ieee754/s_exp2.c: Likewise. * sysdeps/libm-ieee754/s_exp2f.c: Likewise. * sysdeps/libm-ieee754/e_pow.c: Correct typo. * sysdeps/powerpc/elf/libc-start.c: New file. * sysdeps/powerpc/elf/start.S: New file, use libc-start. * sysdeps/powerpc/elf/start.c: Delete. * sysdeps/unix/sysv/linux/powerpc/Dist: Remove syscall.h * sysdeps/unix/sysv/linux/powerpc/syscall.h: Delete. It was unused. * sysdeps/unix/sysv/linux/powerpc/dl-sysdep.c: Correct previous few patches.
Diffstat (limited to 'sysdeps/libm-ieee754/s_exp2f.c')
| -rw-r--r-- | sysdeps/libm-ieee754/s_exp2f.c | 14 |
1 files changed, 3 insertions, 11 deletions
diff --git a/sysdeps/libm-ieee754/s_exp2f.c b/sysdeps/libm-ieee754/s_exp2f.c index 641b7548f1..8229885453 100644 --- a/sysdeps/libm-ieee754/s_exp2f.c +++ b/sysdeps/libm-ieee754/s_exp2f.c @@ -49,7 +49,7 @@ __ieee754_exp2f (float x) /* Check for usual case. */ if (isless (x, himark) && isgreater (x, lomark)) { - static const float TWO15 = 32768.0; + static const float THREEp14 = 49152.0; int tval, unsafe; float rx, x22, result; union ieee754_float ex2_u, scale_u; @@ -67,16 +67,8 @@ __ieee754_exp2f (float x) x = ex + t/512 + x1. First, calculate rx = ex + t/256. */ - if (x >= 0) - { - rx = x + TWO15; - rx -= TWO15; - } - else - { - rx = x - TWO15; - rx += TWO15; - } + rx = x + THREEp14; + rx -= THREEp14; x -= rx; /* Compute x=x1. */ /* Compute tval = (ex*256 + t)+128. Now, t = (tval mod 256)-128 and ex=tval/256 [that's mod, NOT %; and |