Yao Zihong 0698fd462a riscv: memcpy_noalignment: Fold SZREG/BLOCK_SIZE alignment to single andi ... Simplify the alignment steps for SZREG and BLOCK_SIZE multiples. The previous three-instruction sequences addi a7, a2, -SZREG andi a7, a7, -SZREG addi a7, a7, SZREG and addi a7, a2, -BLOCK_SIZE andi a7, a7, -BLOCK_SIZE addi a7, a7, BLOCK_SIZE are equivalent to a single andi a7, a2, -SZREG andi a7, a2, -BLOCK_SIZE because SZREG and BLOCK_SIZE are powers of two in this context, making the surrounding addi steps cancel out. Folding to one instruction reduces code size with identical semantics. No functional change. sysdeps/riscv/multiarch/memcpy_noalignment.S: Remove redundant addi around alignment; keep a single andi for SZREG/BLOCK_SIZE rounding. Signed-off-by: Yao Zihong <zihong.plct@isrc.iscas.ac.cn> Reviewed-by: Peter Bergner <bergner@tenstorrent.com>		2025-10-30 17:47:24 -05:00
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memcpy-generic.c	…
memcpy_noalignment.S	riscv: memcpy_noalignment: Fold SZREG/BLOCK_SIZE alignment to single andi	2025-10-30 17:47:24 -05:00