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8944ba483f
These implementations improve the time to copy data in the glibc microbenchmark as below: memcpy-lasx reduces the runtime about 8%-76% memcpy-lsx reduces the runtime about 8%-72% memcpy-unaligned reduces the runtime of unaligned data copying up to 40% memcpy-aligned reduece the runtime of unaligned data copying up to 25% memmove-lasx reduces the runtime about 20%-73% memmove-lsx reduces the runtime about 50% memmove-unaligned reduces the runtime of unaligned data moving up to 40% memmove-aligned reduces the runtime of unaligned data moving up to 25%
288 lines
7.0 KiB
ArmAsm
288 lines
7.0 KiB
ArmAsm
/* Optimized memmove implementation using Loongarch LASX instructions.
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Copyright (C) 2023 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<https://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#include <sys/regdef.h>
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#include <sys/asm.h>
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#if IS_IN (libc) && !defined __loongarch_soft_float
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#ifndef MEMCPY_NAME
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# define MEMCPY_NAME __memcpy_lasx
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#endif
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#ifndef MEMMOVE_NAME
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# define MEMMOVE_NAME __memmove_lasx
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#endif
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LEAF(MEMCPY_NAME, 6)
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li.d t0, 32
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add.d a3, a0, a2
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add.d a4, a1, a2
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bgeu t0, a2, L(less_32bytes)
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li.d t1, 64
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bltu t1, a2, L(copy_long)
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xvld xr0, a1, 0
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xvld xr1, a4, -32
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xvst xr0, a0, 0
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xvst xr1, a3, -32
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jr ra
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L(less_32bytes):
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srli.d t0, a2, 4
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beqz t0, L(less_16bytes)
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vld vr0, a1, 0
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vld vr1, a4, -16
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vst vr0, a0, 0
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vst vr1, a3, -16
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jr ra
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L(less_16bytes):
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srli.d t0, a2, 3
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beqz t0, L(less_8bytes)
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ld.d t0, a1, 0
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ld.d t1, a4, -8
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st.d t0, a0, 0
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st.d t1, a3, -8
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jr ra
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L(less_8bytes):
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srli.d t0, a2, 2
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beqz t0, L(less_4bytes)
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ld.w t0, a1, 0
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ld.w t1, a4, -4
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st.w t0, a0, 0
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st.w t1, a3, -4
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jr ra
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L(less_4bytes):
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srli.d t0, a2, 1
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beqz t0, L(less_2bytes)
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ld.h t0, a1, 0
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ld.h t1, a4, -2
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st.h t0, a0, 0
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st.h t1, a3, -2
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jr ra
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L(less_2bytes):
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beqz a2, L(less_1bytes)
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ld.b t0, a1, 0
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st.b t0, a0, 0
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L(less_1bytes):
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jr ra
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END(MEMCPY_NAME)
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LEAF(MEMMOVE_NAME, 6)
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li.d t0, 32
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add.d a3, a0, a2
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add.d a4, a1, a2
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bgeu t0, a2, L(less_32bytes)
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li.d t1, 64
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bltu t1, a2, L(move_long)
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xvld xr0, a1, 0
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xvld xr1, a4, -32
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xvst xr0, a0, 0
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xvst xr1, a3, -32
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jr ra
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L(move_long):
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sub.d t2, a0, a1
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bltu t2, a2, L(copy_back)
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L(copy_long):
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andi t2, a0, 0x1f
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addi.d a2, a2, -1
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sub.d t2, t0, t2
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xvld xr8, a1, 0
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xvld xr9, a4, -32
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sub.d t3, a2, t2
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add.d a5, a0, t2
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andi a2, t3, 0xff
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add.d a1, a1, t2
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beq a2, t3, L(lt256)
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sub.d a6, a4, a2
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addi.d a6, a6, -1
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L(loop_256):
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xvld xr0, a1, 0
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xvld xr1, a1, 32
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xvld xr2, a1, 64
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xvld xr3, a1, 96
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xvld xr4, a1, 128
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xvld xr5, a1, 160
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xvld xr6, a1, 192
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xvld xr7, a1, 224
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addi.d a1, a1, 256
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xvst xr0, a5, 0
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xvst xr1, a5, 32
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xvst xr2, a5, 64
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xvst xr3, a5, 96
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xvst xr4, a5, 128
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xvst xr5, a5, 160
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xvst xr6, a5, 192
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xvst xr7, a5, 224
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addi.d a5, a5, 256
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bne a1, a6, L(loop_256)
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L(lt256):
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srli.d t2, a2, 7
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beqz t2, L(lt128)
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xvld xr0, a1, 0
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xvld xr1, a1, 32
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xvld xr2, a1, 64
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xvld xr3, a1, 96
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addi.d a1, a1, 128
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addi.d a2, a2, -128
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xvst xr0, a5, 0
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xvst xr1, a5, 32
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xvst xr2, a5, 64
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xvst xr3, a5, 96
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addi.d a5, a5, 128
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L(lt128):
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bltu a2, t1, L(lt64)
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xvld xr0, a1, 0
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xvld xr1, a1, 32
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addi.d a1, a1, 64
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addi.d a2, a2, -64
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xvst xr0, a5, 0
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xvst xr1, a5, 32
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addi.d a5, a5, 64
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L(lt64):
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bltu a2, t0, L(lt32)
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xvld xr0, a1, 0
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xvst xr0, a5, 0
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L(lt32):
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xvst xr8, a0, 0
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xvst xr9, a3, -32
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jr ra
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nop
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L(copy_back):
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addi.d a3, a3, -1
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addi.d a2, a2, -2
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andi t2, a3, 0x1f
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xvld xr8, a1, 0
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xvld xr9, a4, -32
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sub.d t3, a2, t2
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sub.d a5, a3, t2
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sub.d a4, a4, t2
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andi a2, t3, 0xff
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beq a2, t3, L(back_lt256)
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add.d a6, a1, a2
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addi.d a6, a6, 2
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L(back_loop_256):
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xvld xr0, a4, -33
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xvld xr1, a4, -65
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xvld xr2, a4, -97
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xvld xr3, a4, -129
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xvld xr4, a4, -161
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xvld xr5, a4, -193
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xvld xr6, a4, -225
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xvld xr7, a4, -257
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addi.d a4, a4, -256
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xvst xr0, a5, -32
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xvst xr1, a5, -64
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xvst xr2, a5, -96
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xvst xr3, a5, -128
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xvst xr4, a5, -160
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xvst xr5, a5, -192
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xvst xr6, a5, -224
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xvst xr7, a5, -256
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addi.d a5, a5, -256
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bne a4, a6, L(back_loop_256)
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L(back_lt256):
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srli.d t2, a2, 7
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beqz t2, L(back_lt128)
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xvld xr0, a4, -33
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xvld xr1, a4, -65
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xvld xr2, a4, -97
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xvld xr3, a4, -129
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addi.d a2, a2, -128
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addi.d a4, a4, -128
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xvst xr0, a5, -32
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xvst xr1, a5, -64
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xvst xr2, a5, -96
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xvst xr3, a5, -128
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addi.d a5, a5, -128
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L(back_lt128):
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blt a2, t1, L(back_lt64)
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xvld xr0, a4, -33
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xvld xr1, a4, -65
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addi.d a2, a2, -64
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addi.d a4, a4, -64
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xvst xr0, a5, -32
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xvst xr1, a5, -64
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addi.d a5, a5, -64
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L(back_lt64):
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bltu a2, t0, L(back_lt32)
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xvld xr0, a4, -33
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xvst xr0, a5, -32
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L(back_lt32):
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xvst xr8, a0, 0
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xvst xr9, a3, -31
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jr ra
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END(MEMMOVE_NAME)
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libc_hidden_builtin_def (MEMCPY_NAME)
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libc_hidden_builtin_def (MEMMOVE_NAME)
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#endif
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