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Import 'clrsb' functions from the CM0 library
This implementation provides an efficient tail call to __clzsi2(), making the functions rather smaller and faster than the C versions. gcc/libgcc/ChangeLog: 2022-10-09 Daniel Engel <gnu@danielengel.com> * config/arm/bits/clz2.S (__clrsbsi2, __clrsbdi2): Added new functions. * config/arm/t-elf (LIB1ASMFUNCS): Added new function objects _clrsbsi2 and _clrsbdi2).
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