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In the x86 assembly language, the TEST instruction performs a bitwise AND on two operands. The flags SF, ZF, PF are modified while the result of the AND is discarded. The OF and CF flags are set to 0, while AF flag is undefined. There are 9 different opcodes for the TEST instruction depending on the type and size of the operands. It can compare ...
80386: new opcodes introduced Instruction mnemonics Opcode Description Ring; BT r/m, r: 0F A3 /r: Bit Test. [a] Second operand specifies which bit of the first operand to test. The bit to test is copied to EFLAGS.CF. 3 BT r/m, imm8: 0F BA /4 ib: BTS r/m, r: 0F AB /r: Bit Test-and-set. [a] [b] Second operand specifies which bit of the first ...
Adding BCD numbers using these opcodes is a complex task, and requires many instructions to add even modest numbers. It can also require a large amount of memory. [2] If only doing integer calculations, then all integer calculations are exact, so the radix of the number representation is not important for accuracy.
Test if obj is an instance of class, returning null or an instance of that class or interface. Object model instruction 0x27 jmp <method> Exit current method and jump to the specified method. Base instruction 0xFE 0x09 ldarg <uint16 (num)> Load argument numbered num onto the stack. Base instruction 0x02 ldarg.0: Load argument 0 onto the stack.
The Intel 8085 ("eighty-eighty-five") is an 8-bit microprocessor produced by Intel and introduced in March 1976. [2] It is the last 8-bit microprocessor developed by Intel. It is software- binary compatible with the more-famous Intel 8080 with only two minor instructions added to support its added interrupt and serial input/output features.
When bit 15 of the opcode is set, it indicates that the 8-bit operand address in opcode bits 0–6 and 14 is extended to 16 bits using bits 0–7 of the following instruction word. Such instructions are written with an L prefix (LADD vs. ADD) and take an extra cycle to execute.
Here, find a morning stretch routine recommended by physical therapists, including moves like the cat-cow, figure-4 stretch, and more.
Fetching the instruction opcodes from program memory well in advance is known as prefetching and it is served by using a prefetch input queue (PIQ). The pre-fetched instructions are stored in a queue. The fetching of opcodes well in advance, prior to their need for execution, increases the overall efficiency of the processor boosting its speed ...
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