gcc: Disable use of SIMD registers in memcpy/memset/memmove expansions #995
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stephanosio
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Aug 11, 2025
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@keith-packard zephyrproject-rtos/gcc#60 is merged. Please update the gcc submodule ref to the merged commit. |
vfprintf doesn't perform any floating point math when printing floats, by removing the use of float types, we can avoid using float registers entirely. Signed-off-by: Keith Packard <[email protected]>
The memory operations inlining code for gcc 14 uses SIMD registers which requires switching on the FPU and saving/restoring those registers. For interrupt handlers, that also means disabling interrupts so nested interrupts don't work after the first register access. An upstream patch has been proposed to switch off the SIMD register usage for this case and avoid these effects. Signed-off-by: Keith Packard <[email protected]>
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Avoid using FPU/SIMD registers in code which doesn't explicitly use floating types or SIMD operations.
GCC PR: zephyrproject-rtos/gcc#60