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New posts in instruction-set
How to use processor instructions in C++ to implement fast arithmetic operations
Dec 01, 2021
c++
assembly
processor
instruction-set
Which x86 instruction has a 10-byte immediate?
Sep 07, 2022
assembly
x86
x86-64
machine-code
instruction-set
MIPS: Why do we need load byte when we already have load word?
Nov 06, 2022
assembly
mips
instruction-set
What is an assembly-level representation of pushl/popl %esp?
Nov 03, 2022
assembly
x86
stack-memory
instruction-set
stack-pointer
How is machine code stored in the EXE file?
Nov 13, 2022
x86
portable-executable
machine-code
instruction-set
opcode
What's the point of instructions with only the REX prefix in 64bit mode?
Sep 23, 2022
assembly
x86-64
cpu-registers
instruction-set
How does the CPU know its instruction set?
Nov 19, 2022
cpu
cpu-architecture
instruction-set
machine-code
Difference between PREFETCH and PREFETCHNTA instructions
Sep 12, 2022
assembly
x86
cpu-cache
prefetch
instruction-set
Are PUSH/POP instructions considered RISC or CISC?
Oct 23, 2022
assembly
cpu-architecture
instruction-set
risc
x86 Program Counter abstracted from microarchitecture?
Mar 13, 2022
x86
cpu-architecture
riscv
instruction-set
program-counter
CS:APP example uses idivq with two operands?
Apr 12, 2022
assembly
x86-64
instruction-set
MWAIT vs HALT in terms of efficiency
Nov 19, 2022
assembly
x86-64
cpu-architecture
instruction-set
Disabling AVX2 in CPU for testing purposes
Sep 16, 2022
testing
x86
avx
instruction-set
avx2
How does the CPU distinguish 'CALL rel16' (E8 cw) and 'CALL rel32' (E8 cd)?
Jan 24, 2020
assembly
x86
instruction-set
Why are CISC processors harder to pipeline? In what sense are some instructions "more complex" than others?
Oct 16, 2022
x86
cpu-architecture
instruction-set
pipelining
How does mtune actually work?
Nov 30, 2019
gcc
optimization
cpu-architecture
instructions
instruction-set
Why are RISC-V S-B and U-J instruction types encoded in this way?
Oct 29, 2022
assembly
encoding
riscv
machine-code
instruction-set
What's the point of the VPERMILPS instruction (_mm_permute_ps)?
Sep 17, 2021
assembly
x86
avx
instruction-set
where can I find a description of *all* MIPS instructions
Sep 21, 2022
assembly
mips
instruction-set
mips32
Why does the FMA _mm256_fmadd_pd() intrinsic have 3 asm mnemonics, "vfmadd132pd", "231" and "213"?
Jan 08, 2022
assembly
x86
simd
instruction-set
fma
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