This option (enabled by default) preserves existing behavior by
allowing use of Advanced SIMD registers while expanding
memset/memcpy/memmove operations into inline instructions.
Disabling this option prevents use of these registers for environments
where the FPU may be disabled to reduce the cost of saving/restoring
the processor state, such as in interrupt handlers.
The second patch in this series disables this option by default for
aarch64*-*-elf targets as those are often used for embedded systems
with interrupt handlers.
Keith Packard (2):
aarch64: Add -msimd-memops option controlling SIMD usage in
memset/memcpy
aarch64: Make -mno-simd-memops default for aarch64*-*-elf targets
gcc/common/config/aarch64/aarch64-common.cc | 4 ++++
gcc/config/aarch64/aarch64-elf.h | 3 +++
gcc/config/aarch64/aarch64.cc | 8 +++++---
gcc/config/aarch64/aarch64.h | 7 +++++++
gcc/config/aarch64/aarch64.opt | 4 ++++
gcc/config/aarch64/aarch64.opt.urls | 3 +++
gcc/doc/invoke.texi | 10 +++++++++-
7 files changed, 35 insertions(+), 4 deletions(-)
--
2.49.0
