diff options
Diffstat (limited to 'sysdeps/loongarch/lp64/multiarch/strchr-lsx.S')
-rw-r--r-- | sysdeps/loongarch/lp64/multiarch/strchr-lsx.S | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/sysdeps/loongarch/lp64/multiarch/strchr-lsx.S b/sysdeps/loongarch/lp64/multiarch/strchr-lsx.S new file mode 100644 index 0000000000..dae98b0a55 --- /dev/null +++ b/sysdeps/loongarch/lp64/multiarch/strchr-lsx.S @@ -0,0 +1,73 @@ +/* Optimized strlen implementation using loongarch LSX SIMD instructions. + 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/>. */ + +#include <sysdep.h> +#include <sys/regdef.h> +#include <sys/asm.h> + +#if IS_IN (libc) && !defined __loongarch_soft_float + +#ifndef AS_STRCHRNUL +# define STRCHR __strchr_lsx +#endif + +LEAF(STRCHR, 6) + andi t1, a0, 0xf + bstrins.d a0, zero, 3, 0 + vld vr0, a0, 0 + li.d t2, -1 + + vreplgr2vr.b vr1, a1 + sll.d t3, t2, t1 + vxor.v vr2, vr0, vr1 + vmin.bu vr0, vr0, vr2 + + vmsknz.b vr0, vr0 + movfr2gr.s t0, fa0 + ext.w.h t0, t0 + orn t0, t0, t3 + + beq t0, t2, L(loop) +L(found): + cto.w t0, t0 + add.d a0, a0, t0 +#ifndef AS_STRCHRNUL + vreplve.b vr2, vr2, t0 + vpickve2gr.bu t1, vr2, 0 + masknez a0, a0, t1 +#endif + jr ra + + +L(loop): + vld vr0, a0, 16 + addi.d a0, a0, 16 + vxor.v vr2, vr0, vr1 + vmin.bu vr0, vr0, vr2 + + vsetanyeqz.b fcc0, vr0 + bceqz fcc0, L(loop) + vmsknz.b vr0, vr0 + movfr2gr.s t0, fa0 + + b L(found) +END(STRCHR) + +libc_hidden_builtin_def (STRCHR) +#endif |