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authorH.J. Lu <hjl.tools@gmail.com>2024-11-26 16:15:25 +0800
committerH.J. Lu <hjl.tools@gmail.com>2024-12-04 04:28:15 +0800
commit1c4cebb84b9e33aea9a90adfadb031d1f1eba927 (patch)
treeb8c59eb6388c942da858d8a1881e739c17493d73 /sysdeps/ieee754/ldbl-96/math_ldbl.h
parentf43eb2cf30fdff39bda1c2018246d4badabbc576 (diff)
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malloc: Optimize small memory clearing for callocHEADmaster
Add calloc-clear-memory.h to clear memory size up to 36 bytes (72 bytes on 64-bit targets) for calloc. Use repeated stores with 1 branch, instead of up to 3 branches. On x86-64, it is faster than memset since calling memset needs 1 indirect branch, 1 broadcast, and up to 4 branches. Signed-off-by: H.J. Lu <hjl.tools@gmail.com> Reviewed-by: Wilco Dijkstra <Wilco.Dijkstra@arm.com>
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