gcc-reflection

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Files

Matthias Kretz a0b92a530a libstdc++: Fix find_last_set(simd_mask) to ignore padding bits

With the change to the AVX512 find_last_set implementation, the change
to AVX512 operator!= is unnecessary. However, the latter was not
producing optimal code and unnecessarily set the padding bits. In
theory, the compiler could determine that with the new !=
implementation, the bit operation for clearing the padding bits is a
no-op and can be elided.

Signed-off-by: Matthias Kretz <m.kretz@gsi.de>

libstdc++-v3/ChangeLog:

	PR libstdc++/115454
	* include/experimental/bits/simd_x86.h (_S_not_equal_to): Use
	neq comparison instead of bitwise negation after eq.
	(_S_find_last_set): Clear unused high bits before computing
	bit_width.
	* testsuite/experimental/simd/pr115454_find_last_set.cc: New
	test.

(cherry picked from commit 4787960dcaf0de3f46464960f5246de9b3c69a06)

2024-06-20 20:44:06 +02:00

backward

Update copyright years.

2021-01-04 10:26:59 +01:00

bits

libstdc++: Fix filesystem::remove_all races [PR104161]

2023-10-04 12:10:04 +01:00

Update copyright years.

2021-01-04 10:26:59 +01:00

c_compatibility

Update copyright years.

2021-01-04 10:26:59 +01:00