instruction-set

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What exactly is a machine instruction?
user_148439460
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166
microcoding instructions instruction-set cpu-architecture
Is it legal to have same register as operands in one instruction?
Admin1
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2
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382
instructions x86-64 instruction-set assembly
CPUs with instructions with more than two branch destinations
user_62630410
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3
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61
instruction-set cpu-architecture
If LDT does not exist in 64-bit architecture how are 32-bit systems that use it emulated on a 64-bit architecture?
user_123571800
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2
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243
gdt x86-64 instruction-set x86 assembly
Why decrement %rsp when everything can be done via registers?
Admin1
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2
1
161
x86-64 instruction-set assembly gcc c
If both vmovaps and vmovapd instructions copy a whole XMM register into another, why do both of them exist?
user_83245850
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3
0
326
instruction-set sse x86 assembly
why we can't move a 64-bit immediate value to memory?
user_96234010
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5
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4856
immediate-operand x86-64 instruction-set assembly cpu-architecture
What is the point of SSE2 instructions such as orpd?
user_14550160
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6
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274
instruction-set sse2 sse x86 assembly
Kernel mode for user program
user_120711460
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2
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911
kernel-mode instruction-set kernel processor cpu-architecture
Does intel have a separate instruction set for it's GPU
Admin1
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1136
x86-64 instruction-set opengl intel gpu
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