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Diffstat (limited to 'sysdeps/csky/abiv2/memcpy.S')
| -rw-r--r-- | sysdeps/csky/abiv2/memcpy.S | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/sysdeps/csky/abiv2/memcpy.S b/sysdeps/csky/abiv2/memcpy.S new file mode 100644 index 0000000000..812bdd436e --- /dev/null +++ b/sysdeps/csky/abiv2/memcpy.S @@ -0,0 +1,238 @@ +/* The assembly function for memcpy. C-SKY ABIV2 version. + Copyright (C) 2018 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 + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + +ENTRY (memcpy) + /* Test if len less than 4 bytes. */ + mov r12, r0 + cmplti r2, 4 + bt .L_copy_by_byte + + andi r13, r0, 3 + movi r19, 4 + /* Test if dest is not 4 bytes aligned. */ + bnez r13, .L_dest_not_aligned +.L_dest_aligned: + /* If dest is aligned, then copy. */ + zext r18, r2, 31, 4 + /* Test if len less than 16 bytes. */ + bez r18, .L_len_less_16bytes + movi r19, 0 + + LABLE_ALIGN +.L_len_larger_16bytes: +#if defined (__CSKY_VDSPV2__) + vldx.8 vr0, (r1), r19 + PRE_BNEZAD (r18) + addi r1, 16 + vstx.8 vr0, (r0), r19 + addi r0, 16 +#elif defined (__csky_fpuv2__) && defined(__CK810__) + fldd fr4, (r1, 0) + PRE_BNEZAD (r18) + fstd fr4, (r0, 0) + fldd fr4, (r1, 8) + addi r1, 16 + fstd fr4, (r0, 8) + addi r0, 16 +#elif defined (__CK860__) + ldw r3, (r1, 0) + stw r3, (r0, 0) + ldw r3, (r1, 4) + stw r3, (r0, 4) + ldw r3, (r1, 8) + stw r3, (r0, 8) + ldw r3, (r1, 12) + addi r1, 16 + stw r3, (r0, 12) + addi r0, 16 +#else + ldw r20, (r1, 0) + ldw r21, (r1, 4) + ldw r22, (r1, 8) + ldw r23, (r1, 12) + stw r20, (r0, 0) + stw r21, (r0, 4) + stw r22, (r0, 8) + stw r23, (r0, 12) + PRE_BNEZAD (r18) + addi r1, 16 + addi r0, 16 +#endif + BNEZAD (r18, .L_len_larger_16bytes) + +.L_len_less_16bytes: + zext r18, r2, 3, 2 + bez r18, .L_copy_by_byte +.L_len_less_16bytes_loop: + ldw r3, (r1, 0) + PRE_BNEZAD (r18) + addi r1, 4 + stw r3, (r0, 0) + addi r0, 4 + BNEZAD (r18, .L_len_less_16bytes_loop) + + /* Test if len less than 4 bytes. */ +.L_copy_by_byte: + zext r18, r2, 1, 0 + bez r18, .L_return +.L_copy_by_byte_loop: + ldb r3, (r1, 0) + PRE_BNEZAD (r18) + addi r1, 1 + stb r3, (r0, 0) + addi r0, 1 + BNEZAD (r18, .L_copy_by_byte_loop) + +.L_return: + mov r0, r12 + rts + + /* If dest is not aligned, just copying some bytes makes the dest + align. */ + +.L_dest_not_aligned: + sub r13, r19, r13 + mov r19, r13 +.L_dest_not_aligned_loop: + /* Makes the dest align. */ + ldb r3, (r1, 0) + PRE_BNEZAD (r13) + addi r1, 1 + stb r3, (r0, 0) + addi r0, 1 + BNEZAD (r13, .L_dest_not_aligned_loop) + sub r2, r19 + cmplti r2, 4 + bt .L_copy_by_byte + /* Check whether the src is aligned. */ + br .L_dest_aligned +END (memcpy) + +libc_hidden_builtin_def (memcpy) +.weak memcpy + + +ENTRY (memmove) + subu r3, r0, r1 + cmphs r3, r2 + bt memcpy + + mov r12, r0 + addu r0, r0, r2 + addu r1, r1, r2 + + /* Test if len less than 4 bytes. */ + cmplti r2, 4 + bt .L_copy_by_byte_m + + andi r13, r0, 3 + /* Test if dest is not 4 bytes aligned. */ + bnez r13, .L_dest_not_aligned_m +.L_dest_aligned_m: + /* If dest is aligned, then copy. */ + zext r18, r2, 31, 4 + /* Test if len less than 16 bytes. */ + bez r18, .L_len_less_16bytes_m + movi r19, 0 + + /* len > 16 bytes */ + LABLE_ALIGN +.L_len_larger_16bytes_m: + subi r1, 16 + subi r0, 16 +#if defined (__CSKY_VDSPV2__) + vldx.8 vr0, (r1), r19 + PRE_BNEZAD (r18) + vstx.8 vr0, (r0), r19 +#elif defined (__csky_fpuv2__) && defined(__CK810__) + fldd fr4, (r1, 8) + PRE_BNEZAD (r18) + fstd fr4, (r0, 8) + fldd fr4, (r1, 0) + fstd fr4, (r0, 0) +#elif defined (__CK860__) + ldw r3, (r1, 12) + stw r3, (r0, 12) + ldw r3, (r1, 8) + stw r3, (r0, 8) + ldw r3, (r1, 4) + stw r3, (r0, 4) + ldw r3, (r1, 0) + stw r3, (r0, 0) +#else + ldw r20, (r1, 0) + ldw r21, (r1, 4) + ldw r22, (r1, 8) + ldw r23, (r1, 12) + stw r20, (r0, 0) + stw r21, (r0, 4) + stw r22, (r0, 8) + stw r23, (r0, 12) + PRE_BNEZAD (r18) +#endif + BNEZAD (r18, .L_len_larger_16bytes_m) + +.L_len_less_16bytes_m: + zext r18, r2, 3, 2 + bez r18, .L_copy_by_byte_m +.L_len_less_16bytes_loop_m: + subi r1, 4 + subi r0, 4 + ldw r3, (r1, 0) + PRE_BNEZAD (r18) + stw r3, (r0, 0) + BNEZAD (r18, .L_len_less_16bytes_loop_m) + + /* Test if len less than 4 bytes. */ +.L_copy_by_byte_m: + zext r18, r2, 1, 0 + bez r18, .L_return_m +.L_copy_by_byte_loop_m: + subi r1, 1 + subi r0, 1 + ldb r3, (r1, 0) + PRE_BNEZAD (r18) + stb r3, (r0, 0) + BNEZAD (r18, .L_copy_by_byte_loop_m) + +.L_return_m: + mov r0, r12 + rts + + /* If dest is not aligned, just copying some bytes makes the dest + align. */ +.L_dest_not_aligned_m: + sub r2, r13 +.L_dest_not_aligned_loop_m: + subi r1, 1 + subi r0, 1 + /* Makes the dest align. */ + ldb r3, (r1, 0) + PRE_BNEZAD (r13) + stb r3, (r0, 0) + BNEZAD (r13, .L_dest_not_aligned_loop_m) + cmplti r2, 4 + bt .L_copy_by_byte_m + /* Check whether the src is aligned. */ + br .L_dest_aligned_m +END (memmove) + +libc_hidden_builtin_def (memmove) +.weak memmove |