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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 numerical 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 ...
The BT x86 assembly language instruction stands for Bit Test and was added to the x86 instruction set with the 80386 processor. BT copies a bit from a given register to the carry flag . [ 1 ]
x86 assembly language has two primary syntax branches: Intel syntax and AT&T syntax. [6] Intel syntax is dominant in the DOS and Windows environments, while AT&T syntax is dominant in Unix-like systems, as Unix was originally developed at AT&T Bell Labs. [7] Below is a summary of the main differences between Intel syntax and AT&T syntax:
In computer programming, assembly language (alternatively assembler language [1] or symbolic machine code), [2] [3] [4] often referred to simply as assembly and commonly abbreviated as ASM or asm, is any low-level programming language with a very strong correspondence between the instructions in the language and the architecture's machine code instructions. [5]
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 operand to test and set. BTS r/m, imm8: 0F BA /5 ib: BTR r/m, r: 0F B3 /r: Bit Test and Reset. [a] [b] Second operand specifies which bit of the first operand to test and clear. BTR ...
The 80287 (i287) is the math coprocessor for the Intel 80286 series of microprocessors. Intel's models included variants with specified upper frequency limits ranging from 6 up to 12 MHz. The NMOS version were available 6, 8 and 10 MHz. [10] The available 10 MHz Intel 80287-10 Numerics Coprocessor version was for 250 USD in quantities of 100. [11]
LLVM assembly language: Operand width, if 2nd argument is 0; undefined otherwise GHC 7.10 (base 4.8), in Data.Bits [citation needed] countLeadingZeros countTrailingZeros: Library function: FiniteBits b => b: Haskell programming language: Operand width C++20 standard library, in header <bit> [33] [34] bit_ceil bit_floor bit_width countl_zero ...
As it is an assembly language, BAL uses the native instruction set of the IBM mainframe architecture on which it runs, System/360, just as the successors to BAL use the native instruction sets of the IBM mainframe architectures on which they run, including System/360, System/370, System/370-XA, ESA/370, ESA/390, and z/Architecture.