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| author | Siddhesh Poyarekar <siddhesh@sourceware.org> | 2020-12-23 14:02:02 +0530 |
|---|---|---|
| committer | Siddhesh Poyarekar <siddhesh@sourceware.org> | 2020-12-24 06:05:40 +0530 |
| commit | 94547d9209db483c17285599a0c22085067361f0 (patch) | |
| tree | caae072fb2da5b7433fbe8aff154b8bb5f26d39e /sysdeps | |
| parent | b7f88156174f9bbf9c9393651b2ad0cdd3893e83 (diff) | |
| download | glibc-94547d9209db483c17285599a0c22085067361f0.zip glibc-94547d9209db483c17285599a0c22085067361f0.tar.gz glibc-94547d9209db483c17285599a0c22085067361f0.tar.bz2 | |
x86 long double: Support pseudo numbers in isnanl
This syncs up isnanl behaviour with gcc. Also move the isnanl
implementation to sysdeps/x86 and remove the sysdeps/x86_64 version.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/x86/fpu/s_isnanl.c (renamed from sysdeps/i386/fpu/s_isnanl.c) | 12 | ||||
| -rw-r--r-- | sysdeps/x86_64/fpu/s_isnanl.c | 1 |
2 files changed, 7 insertions, 6 deletions
diff --git a/sysdeps/i386/fpu/s_isnanl.c b/sysdeps/x86/fpu/s_isnanl.c index fb97317..45541df 100644 --- a/sysdeps/i386/fpu/s_isnanl.c +++ b/sysdeps/x86/fpu/s_isnanl.c @@ -28,16 +28,18 @@ static char rcsid[] = "$NetBSD: $"; int __isnanl(long double x) { - int32_t se,hx,lx; + int32_t se,hx,lx,pn; GET_LDOUBLE_WORDS(se,hx,lx,x); se = (se & 0x7fff) << 1; - /* The additional & 0x7fffffff is required because Intel's - extended format has the normally implicit 1 explicit - present. Sigh! */ + /* Detect pseudo-normal numbers, i.e. exponent is non-zero and the top + bit of the significand is not set. */ + pn = (uint32_t)((~hx & 0x80000000) & (se|(-se)))>>31; + /* Clear the significand bit when computing mantissa. */ lx |= hx & 0x7fffffff; se |= (uint32_t)(lx|(-lx))>>31; se = 0xfffe - se; - return (int)((uint32_t)(se))>>16; + + return (int)(((uint32_t)(se)) >> 16) | pn; } hidden_def (__isnanl) weak_alias (__isnanl, isnanl) diff --git a/sysdeps/x86_64/fpu/s_isnanl.c b/sysdeps/x86_64/fpu/s_isnanl.c deleted file mode 100644 index 06e69c3..0000000 --- a/sysdeps/x86_64/fpu/s_isnanl.c +++ /dev/null @@ -1 +0,0 @@ -#include <sysdeps/i386/fpu/s_isnanl.c> |