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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2023-12-26 16:52:19 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2023-12-27 10:22:36 -0300 |
| commit | b046c66f0874fa75d1bc859851f7d2e28481905f (patch) | |
| tree | 3560f3f861a5462174efb72dc09c550d70729720 | |
| parent | 28e3562609428955f34960abe83d530a116d32cf (diff) | |
| download | glibc-b046c66f0874fa75d1bc859851f7d2e28481905f.tar.gz glibc-b046c66f0874fa75d1bc859851f7d2e28481905f.tar.xz glibc-b046c66f0874fa75d1bc859851f7d2e28481905f.zip | |
mips: Implement trunc with hardware floating-point rounding instruction
| -rw-r--r-- | sysdeps/mips/fpu/round_to_integer.h | 4 | ||||
| -rw-r--r-- | sysdeps/mips/fpu/s_trunc.c | 36 |
2 files changed, 40 insertions, 0 deletions
diff --git a/sysdeps/mips/fpu/round_to_integer.h b/sysdeps/mips/fpu/round_to_integer.h index a2146e4a71..78975ce3eb 100644 --- a/sysdeps/mips/fpu/round_to_integer.h +++ b/sysdeps/mips/fpu/round_to_integer.h @@ -26,6 +26,7 @@ enum round_mode { CEIL, FLOOR, + TRUNC, }; static inline double @@ -46,6 +47,9 @@ round_to_integer_double (enum round_mode mode, double x) case FLOOR: asm ("floor.l.d %0, %0" : "+f" (r)); break; + case TRUNC: + asm ("trunc.l.d %0, %0" : "+f" (r)); + break; } libc_fesetenv (&fe); diff --git a/sysdeps/mips/fpu/s_trunc.c b/sysdeps/mips/fpu/s_trunc.c new file mode 100644 index 0000000000..fcc9a8f008 --- /dev/null +++ b/sysdeps/mips/fpu/s_trunc.c @@ -0,0 +1,36 @@ +/* Round to integer, toward zero. MIPS version. + Copyright (C) 2023 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <https://www.gnu.org/licenses/>. */ + +#if ((__mips_fpr == 64) \ + && (__mips_hard_float == 1) \ + && ((__mips == 32 && __mips_isa_rev > 1) || __mips == 64)) + +#define NO_MATH_REDIRECT +#include <math.h> +#include <round_to_integer.h> +#include <libm-alias-double.h> + +double +__trunc (double x) +{ + return round_to_integer_double (TRUNC, x); +} +libm_alias_double (__trunc, trunc) +#else +# include <sysdeps/ieee754/dbl-64/s_trunc.c> +#endif |