What is movaps?

MOVAPS xmm2/m128, xmm1. Move packed single-precision floating-point values from xmm1 to xmm2/m128. Description. Moves a double quadword containing four packed single-precision floating-point values from the source operand (second operand) to the destination operand (first operand).

What is SSE in assembly?

SSE stands for Streaming SIMD Extensions. It is essentially the floating-point equivalent of the MMX instructions. The SSE registers are 128 bits, and can be used to perform operations on a variety of data sizes and types.

What is xmm0 register?

A brand new set of registers, xmm0 through xmm15. xmm0 is used to return values from functions, and as the first function argument. They’re *all* scratch registers; a perfectly anarchist setup.

What is XMM register used for?

XMM registers can only be used to perform calculations on data; they cannot be used to address memory. Addressing memory is accomplished by using the general-purpose registers. consecutive bytes, with the low-order byte of the register being stored in the first byte in memory.

What is PXOR?

Bitwise XOR of packed quadword integers in ymm2 and ymm3/m256 using writemask k1. …

What is Movss Assembly?

The movss command can only be used with xmm registers. Moves a scalar single-precision floating-point value from the source operand (second operand) to the destination operand (first operand). The source and destination operands can be XMM registers or 32-bit memory locations.

What is XMM Assembly?

XMM registers, instead, are a completely separate registers set, introduced with SSE and still widely used to this day. They are 128 bit wide, with instructions that can treat them as arrays of 64, 32 (integer and floating point),16 or 8 bit (integer only) values. You have 8 of them in 32 bit mode, 16 in 64 bit.

What is EAX in assembly?

eax is the 32-bit, “int” size register. It was added in 1985 during the transition to 32-bit processors with the 80386 CPU. It was added in 1979 with the 8086 CPU, but is used in DOS or BIOS code to this day. al and ah are the 8-bit, “char” size registers.

What is Movzx Assembly?

movzx reads the contents of the register or effective address as a word or byte. movzx then sign-extends the 16- or 32-bit value to the operand-size attribute of the instruction. The result is stored in the destination register by movzx.

What is MOVQ?

movq (assuming you’re talking about x86) is a move of a quadword (64-bit value). This particular instruction: movq (%rsp), %rsp. looks very much like code that will walk up through stack frames.

What is the instruction set for movaps XMM1 move?

MOVAPS xmm1, xmm2/m128 Move packed single-precision floating-point values from xmm2/m128 to xmm1. 0F 29 /r MOVAPS xmm2/m128, xmm1 Move packed single-precision floating-point values from xmm1 to xmm2/m128. Description

What’s the difference between movdqa and movaps x86?

I’m looking Intel datasheet: Intel® 64 and IA-32 Architectures Software Developer’s Manual and I can’t find the difference between This instruction can be used to load an XMM register from a 128-bit memory location, to store the contents of an XMM register into a 128-bit memory location, or to move data between two XMM registers.

How many bits of floating point are in movaps?

Moves 512 bits of packed single-precision floating-point values from the source operand (second operand) to the destination operand (first operand).

How does movups move single precision floating point?

Moves 512 bits of packed single-precision floating-point values from the source operand (second operand) to the destination operand (first operand). This instruction can be used to load a ZMM register from a 512-bit float32 memory location, to store the contents of a ZMM register into memory.