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riscv: remove more riscv64sf support

Description

riscv: remove more riscv64sf support

Remove a few more bits of riscv64sf support in libc and libm.

Reduce floating point ABI checks to requiring double hard float.

Reviewed by: imp, jhb
Fixes: 1ca12bd927d7 Remove the riscv64sf architecture.
Differential Revision: https://reviews.freebsd.org/D44334

Details

Provenance
brooksAuthored on Mar 21 2024, 11:46 PM
Reviewer
rG1ca12bd927d7: Remove the riscv64sf architecture.
Differential Revision
D44334: riscv: remove more riscv64sf support
Parents
rG1947a9383ec3: msun/riscv: expose fe{disable,enable}except
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