-
encoding of
LZCNT takes the same
encoding path as the
encoding of the BSR (bit scan reverse) instruction. This
results in an
issue where LZCNT called on...
- C++:
Compiler Intrinsics. Microsoft.
Retrieved 2018-05-21. "__lzcnt16, __
lzcnt, __lzcnt64".
Visual Studio 2008:
Visual C++:
Compiler Intrinsics. Microsoft...
- ABM flag to
indicate LZCNT support (since
LZCNT combined with BMI1 and BMI2
completes the
expanded ABM
instruction set).
LZCNT is
related to the Bit...
- opcode, then the
instruction will
execute as
LZCNT on
systems that
support the ABM or
LZCNT extensions.
LZCNT produces a
different result from BSR for most...
- instructions) AVX2
vpermd BMI1 andn BMI2 bzhi F16C vcvtph2ps FMA vfmadd132pd
LZCNT lzcnt MOVBE movbe OSXSAVE xgetbv x86-64-v4 AVX512F
kmovw Intel Skylake and...
-
number of
leading zero bits for
packed double- or
quadword values Vectorized LZCNT instruction VPBROADCASTMB2Q, VPBROADCASTMW2D
Broadcast mask to
vector register...
- BMI1,
MOVBE (Move Big-Endian instruction), XSAVE/XSAVEOPT, ABM (POPCNT/
LZCNT), and AMD-V. Over 10%
increase in
clock frequency Over 15%
improvement in...
- CR8 in 32-bit mode 4 5 msr Model-specific
registers abm/
lzcnt Advanced bit mani****tion (
LZCNT and POPCNT) 5 6 pae
Physical Address Extension sse4a SSE4a...
- BMI1,
MOVBE (Move Big-Endian instruction), XSAVE/XSAVEOPT, ABM (POPCNT/
LZCNT), and AMD-V. 19% CPU core
leakage reduction at 1.2V 38% GPU
leakage reduction...
- most
Intel chips, it's BSR (bitscan reverse),
though newer SoCs also have
LZCNT (count
leading zeros) Warren,
Henry S. (2013). Hacker's
Delight (2nd ed...
