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5ba15d419f
Add an optimized strnlen() implementation for RISC-V. This version includes a generic optimization and a Zbb-powered optimization using the 'orc.b' instruction, derived from the strlen() implementation. Benchmark results (QEMU TCG, rv64): Length | Original (MB/s) | Optimized (MB/s) | Improvement -------|-----------------|------------------|------------ 16 B | 179 | 309 | +72.6% 512 B | 347 | 1562 | +350.1% 4096 B | 356 | 1878 | +427.5% Suggested-by: Qingfang Deng <dqfext@gmail.com> Signed-off-by: Feng Jiang <jiangfeng@kylinos.cn> Link: https://patch.msgid.link/20260130025018.172925-7-jiangfeng@kylinos.cn Signed-off-by: Paul Walmsley <pjw@kernel.org>
22 lines
607 B
Makefile
22 lines
607 B
Makefile
# SPDX-License-Identifier: GPL-2.0-only
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lib-y += delay.o
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lib-y += memcpy.o
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lib-y += memset.o
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lib-y += memmove.o
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ifeq ($(CONFIG_KASAN_GENERIC)$(CONFIG_KASAN_SW_TAGS),)
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lib-y += strcmp.o
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lib-y += strlen.o
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lib-y += strncmp.o
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lib-y += strnlen.o
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endif
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lib-y += csum.o
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ifeq ($(CONFIG_MMU), y)
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lib-$(CONFIG_RISCV_ISA_V) += uaccess_vector.o
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endif
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lib-$(CONFIG_MMU) += uaccess.o
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lib-$(CONFIG_64BIT) += tishift.o
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lib-$(CONFIG_RISCV_ISA_ZICBOZ) += clear_page.o
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obj-$(CONFIG_FUNCTION_ERROR_INJECTION) += error-inject.o
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lib-$(CONFIG_RISCV_ISA_V) += xor.o
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lib-$(CONFIG_RISCV_ISA_V) += riscv_v_helpers.o
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