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| author | Raphael Moreira Zinsly <rzinsly@linux.ibm.com> | 2021-02-25 09:58:52 -0300 |
|---|---|---|
| committer | Raphael Moreira Zinsly <rzinsly@linux.ibm.com> | 2021-03-16 12:19:09 -0300 |
| commit | a7d88506c260e7a0e4268803e76fc19e38ed041f (patch) | |
| tree | d73cedc44f37c0e81e5a5416209929f3d3c979b5 | |
| parent | 56c81132ccc6f468fa4fc29c536db060e18e9d87 (diff) | |
| download | glibc-a7d88506c260e7a0e4268803e76fc19e38ed041f.tar.gz | |
powerpc: Add optimized llogb* for POWER9
The POWER9 builtins used to improve the ilogb* functions can be
used in the llogb* functions as well.
| -rw-r--r-- | sysdeps/powerpc/powerpc64/le/fpu/w_llogb_template.c | 39 | ||||
| -rw-r--r-- | sysdeps/powerpc/powerpc64/le/fpu/w_llogbl.c | 4 |
2 files changed, 43 insertions, 0 deletions
diff --git a/sysdeps/powerpc/powerpc64/le/fpu/w_llogb_template.c b/sysdeps/powerpc/powerpc64/le/fpu/w_llogb_template.c new file mode 100644 index 0000000000..d00b71d2a3 --- /dev/null +++ b/sysdeps/powerpc/powerpc64/le/fpu/w_llogb_template.c @@ -0,0 +1,39 @@ +#include <math.h> +#include <errno.h> +#include <limits.h> +#include <math_private.h> +#include <fenv.h> + +#if _GL_HAS_BUILTIN_ILOGB +long int +M_DECL_FUNC (__llogb) (FLOAT x) +{ + int r; + /* Check for exceptional cases. */ + if (! M_SUF(__builtin_test_dc_ilogb) (x, 0x7f)) + r = M_SUF (__builtin_ilogb) (x); + else + /* Fallback to the generic ilogb if x is NaN, Inf or subnormal. */ + r = M_SUF (__ieee754_ilogb) (x); + long int lr = r; + if (__glibc_unlikely (r == FP_ILOGB0) + || __glibc_unlikely (r == FP_ILOGBNAN) + || __glibc_unlikely (r == INT_MAX)) + { +#if LONG_MAX != INT_MAX + if (r == FP_ILOGB0) + lr = FP_LLOGB0; + else if (r == FP_ILOGBNAN) + lr = FP_LLOGBNAN; + else + lr = LONG_MAX; +#endif + __set_errno (EDOM); + __feraiseexcept (FE_INVALID); + } + return lr; +} +declare_mgen_alias (__llogb, llogb) +#else +#include <math/w_llogb_template.c> +#endif diff --git a/sysdeps/powerpc/powerpc64/le/fpu/w_llogbl.c b/sysdeps/powerpc/powerpc64/le/fpu/w_llogbl.c new file mode 100644 index 0000000000..69477a37ae --- /dev/null +++ b/sysdeps/powerpc/powerpc64/le/fpu/w_llogbl.c @@ -0,0 +1,4 @@ +/* Skip the optimization for long double as ibm128 does not provide an + optimized builtin. */ +#include <math-type-macros-ldouble.h> +#include <math/w_llogb_template.c> |