| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* Copyright (C) 2023 Rivos Inc. */ |
| |
| #include <linux/linkage.h> |
| #include <asm/asm.h> |
| |
| .text |
| |
| /* void __riscv_copy_words_unaligned(void *, const void *, size_t) */ |
| /* Performs a memcpy without aligning buffers, using word loads and stores. */ |
| /* Note: The size is truncated to a multiple of 8 * SZREG */ |
| ENTRY(__riscv_copy_words_unaligned) |
| andi a4, a2, ~((8*SZREG)-1) |
| beqz a4, 2f |
| add a3, a1, a4 |
| 1: |
| REG_L a4, 0(a1) |
| REG_L a5, SZREG(a1) |
| REG_L a6, 2*SZREG(a1) |
| REG_L a7, 3*SZREG(a1) |
| REG_L t0, 4*SZREG(a1) |
| REG_L t1, 5*SZREG(a1) |
| REG_L t2, 6*SZREG(a1) |
| REG_L t3, 7*SZREG(a1) |
| REG_S a4, 0(a0) |
| REG_S a5, SZREG(a0) |
| REG_S a6, 2*SZREG(a0) |
| REG_S a7, 3*SZREG(a0) |
| REG_S t0, 4*SZREG(a0) |
| REG_S t1, 5*SZREG(a0) |
| REG_S t2, 6*SZREG(a0) |
| REG_S t3, 7*SZREG(a0) |
| addi a0, a0, 8*SZREG |
| addi a1, a1, 8*SZREG |
| bltu a1, a3, 1b |
| |
| 2: |
| ret |
| END(__riscv_copy_words_unaligned) |
| |
| /* void __riscv_copy_bytes_unaligned(void *, const void *, size_t) */ |
| /* Performs a memcpy without aligning buffers, using only byte accesses. */ |
| /* Note: The size is truncated to a multiple of 8 */ |
| ENTRY(__riscv_copy_bytes_unaligned) |
| andi a4, a2, ~(8-1) |
| beqz a4, 2f |
| add a3, a1, a4 |
| 1: |
| lb a4, 0(a1) |
| lb a5, 1(a1) |
| lb a6, 2(a1) |
| lb a7, 3(a1) |
| lb t0, 4(a1) |
| lb t1, 5(a1) |
| lb t2, 6(a1) |
| lb t3, 7(a1) |
| sb a4, 0(a0) |
| sb a5, 1(a0) |
| sb a6, 2(a0) |
| sb a7, 3(a0) |
| sb t0, 4(a0) |
| sb t1, 5(a0) |
| sb t2, 6(a0) |
| sb t3, 7(a0) |
| addi a0, a0, 8 |
| addi a1, a1, 8 |
| bltu a1, a3, 1b |
| |
| 2: |
| ret |
| END(__riscv_copy_bytes_unaligned) |
