diff options
Diffstat (limited to 'sysdeps/loongarch/lp64/multiarch/strcpy-lasx.S')
| -rw-r--r-- | sysdeps/loongarch/lp64/multiarch/strcpy-lasx.S | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/sysdeps/loongarch/lp64/multiarch/strcpy-lasx.S b/sysdeps/loongarch/lp64/multiarch/strcpy-lasx.S new file mode 100644 index 0000000000..c282561253 --- /dev/null +++ b/sysdeps/loongarch/lp64/multiarch/strcpy-lasx.S @@ -0,0 +1,215 @@ +/* Optimized strcpy stpcpy implementation using LoongArch LASX 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 STRCPY +# define STRCPY __strcpy_lasx +# endif + +# ifdef USE_AS_STPCPY +# define dstend a0 +# else +# define dstend a4 +# endif + +LEAF(STRCPY, 6) + ori t8, zero, 0xfe0 + andi t0, a1, 0xfff + li.d t7, -1 + move a2, a0 + + bltu t8, t0, L(page_cross_start) +L(start_entry): + xvld xr0, a1, 0 + li.d t0, 32 + andi t1, a2, 0x1f + + xvsetanyeqz.b fcc0, xr0 + sub.d t0, t0, t1 + bcnez fcc0, L(end) + add.d a1, a1, t0 + + xvst xr0, a2, 0 + andi a3, a1, 0x1f + add.d a2, a2, t0 + bnez a3, L(unaligned) + + + xvld xr0, a1, 0 + xvsetanyeqz.b fcc0, xr0 + bcnez fcc0, L(al_end) +L(al_loop): + xvst xr0, a2, 0 + + xvld xr0, a1, 32 + addi.d a2, a2, 32 + addi.d a1, a1, 32 + xvsetanyeqz.b fcc0, xr0 + + bceqz fcc0, L(al_loop) +L(al_end): + xvmsknz.b xr0, xr0 + xvpickve.w xr1, xr0, 4 + vilvl.h vr0, vr1, vr0 + + movfr2gr.s t0, fa0 + cto.w t0, t0 + add.d a1, a1, t0 + xvld xr0, a1, -31 + + + add.d dstend, a2, t0 + xvst xr0, dstend, -31 + jr ra + nop + +L(page_cross_start): + move a4, a1 + bstrins.d a4, zero, 4, 0 + xvld xr0, a4, 0 + xvmsknz.b xr0, xr0 + + xvpickve.w xr1, xr0, 4 + vilvl.h vr0, vr1, vr0 + movfr2gr.s t0, fa0 + sra.w t0, t0, a1 + + beq t0, t7, L(start_entry) + b L(tail) +L(unaligned): + andi t0, a1, 0xfff + bltu t8, t0, L(un_page_cross) + + +L(un_start_entry): + xvld xr0, a1, 0 + xvsetanyeqz.b fcc0, xr0 + bcnez fcc0, L(un_end) + addi.d a1, a1, 32 + +L(un_loop): + xvst xr0, a2, 0 + andi t0, a1, 0xfff + addi.d a2, a2, 32 + bltu t8, t0, L(page_cross_loop) + +L(un_loop_entry): + xvld xr0, a1, 0 + addi.d a1, a1, 32 + xvsetanyeqz.b fcc0, xr0 + bceqz fcc0, L(un_loop) + + addi.d a1, a1, -32 +L(un_end): + xvmsknz.b xr0, xr0 + xvpickve.w xr1, xr0, 4 + vilvl.h vr0, vr1, vr0 + + + movfr2gr.s t0, fa0 +L(un_tail): + cto.w t0, t0 + add.d a1, a1, t0 + xvld xr0, a1, -31 + + add.d dstend, a2, t0 + xvst xr0, dstend, -31 + jr ra +L(un_page_cross): + sub.d a4, a1, a3 + + xvld xr0, a4, 0 + xvmsknz.b xr0, xr0 + xvpickve.w xr1, xr0, 4 + vilvl.h vr0, vr1, vr0 + + movfr2gr.s t0, fa0 + sra.w t0, t0, a1 + beq t0, t7, L(un_start_entry) + b L(un_tail) + + +L(page_cross_loop): + sub.d a4, a1, a3 + xvld xr0, a4, 0 + xvmsknz.b xr0, xr0 + xvpickve.w xr1, xr0, 4 + + vilvl.h vr0, vr1, vr0 + movfr2gr.s t0, fa0 + sra.w t0, t0, a1 + beq t0, t7, L(un_loop_entry) + + b L(un_tail) +L(end): + xvmsknz.b xr0, xr0 + xvpickve.w xr1, xr0, 4 + vilvl.h vr0, vr1, vr0 + + movfr2gr.s t0, fa0 +L(tail): + cto.w t0, t0 + add.d dstend, a2, t0 + add.d a5, a1, t0 + +L(less_32): + srli.d t1, t0, 4 + beqz t1, L(less_16) + vld vr0, a1, 0 + vld vr1, a5, -15 + + vst vr0, a2, 0 + vst vr1, dstend, -15 + jr ra +L(less_16): + srli.d t1, t0, 3 + + beqz t1, L(less_8) + ld.d t2, a1, 0 + ld.d t3, a5, -7 + st.d t2, a2, 0 + + st.d t3, dstend, -7 + jr ra +L(less_8): + li.d t1, 3 + bltu t0, t1, L(less_3) + + ld.w t2, a1, 0 + ld.w t3, a5, -3 + st.w t2, a2, 0 + st.w t3, dstend, -3 + + jr ra +L(less_3): + beqz t0, L(zero_byte) + ld.h t2, a1, 0 + + st.h t2, a2, 0 +L(zero_byte): + st.b zero, dstend, 0 + jr ra +END(STRCPY) + +libc_hidden_builtin_def (STRCPY) +#endif |