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369442 |
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09-Mar-2021 |
dim |
Build lib/msun tests with compiler builtins disabled
This forces the compiler to emit calls to libm functions, instead of possibly substituting pre-calculated results at compile time, which should help to actually test those functions.
Reviewed by: emaste, arichardson, ngie Differential Revision: https://reviews.freebsd.org/D28577
(cherry picked from commit cf97d2a1dab8f2cddc4466fe64d37818339c73be)
riscv: Add a soft-float implementation of fabs()
We could just use a C implementation using __builtin_fabs(), but using this assembly version guarantees that there is no additional prolog/epilog code. Additionally, clang generates worse code for masking off the top bit than GCC: https://bugs.llvm.org/show_bug.cgi?id=49377.
This fixes the RISCV64 softfloat world build after cf97d2a1dab8. That commit added -fno-builtin to the msun tests which resulted in the first references to fabs (previously the compiler inlined all calls).
Reviewed By: dim Reported by: mjg Differential Revision: https://reviews.freebsd.org/D28994
(cherry picked from commit 524b018d200408bed5eb0d2b892db5b9fb46808b)
riscv: Fix whitespace issues in fabs added in 524b018d2004
(cherry picked from commit 066dab17e7a4a78d43dbcef8119960ddc8090a73)
Git Hash: 7ee9798bad0b42983259e3a9e131789f4a49c117 Git Author: dim@FreeBSD.org
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