rte_memcpy.h(3)

💖 rte_memcpy.h(3) 💖

okay bestie, welcome to the Library Functions Manual, and this one's a lil header file that's lowkey carrying the whole packet-copying operation on its back. it's giving "small file, huge responsibilities." let's get into it 🫶

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✨ NAME ✨

rte_memcpy.h — the header where DPDK keeps its vectorised memory-copying besties 💅

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✨ SYNOPSIS ✨

🌸 Functions 🌸

static void rte_mov16 (uint8_t *dst, const uint8_t *src)
static void rte_mov32 (uint8_t *dst, const uint8_t *src)
static void rte_mov48 (uint8_t *dst, const uint8_t *src)
static void rte_mov64 (uint8_t *dst, const uint8_t *src)
static void rte_mov128 (uint8_t *dst, const uint8_t *src)
static void rte_mov256 (uint8_t *dst, const uint8_t *src)
static void * rte_memcpy (void *dst, const void *src, size_t n)

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🦋 Detailed Description 🦋

Functions for vectorised implementation of memcpy().

Definition in file rte_memcpy.h. ✨

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👑 Function Documentation 👑

💫 void rte_mov16 (uint8_t * dst, const uint8_t * src) [inline], [static] 💫

Copy 16 bytes from one location to another using optimised instructions.

The locations should not overlap. fr fr, do not do that.

Parameters

• dst — Pointer to the destination of the data.
• src — Pointer to the source data.

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💫 void rte_mov32 (uint8_t * dst, const uint8_t * src) [inline], [static] 💫

Copy 32 bytes from one location to another using optimised instructions.

The locations should not overlap.

Parameters

• dst — Pointer to the destination of the data.
• src — Pointer to the source data.

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💫 void rte_mov48 (uint8_t * dst, const uint8_t * src) [inline], [static] 💫

Copy 48 bytes from one location to another using optimised instructions.

The locations should not overlap.

Parameters

• dst — Pointer to the destination of the data.
• src — Pointer to the source data.

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💫 void rte_mov64 (uint8_t * dst, const uint8_t * src) [inline], [static] 💫

Copy 64 bytes from one location to another using optimised instructions.

The locations should not overlap.

Parameters

• dst — Pointer to the destination of the data.
• src — Pointer to the source data.

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💫 void rte_mov128 (uint8_t * dst, const uint8_t * src) [inline], [static] 💫

Copy 128 bytes from one location to another using optimised instructions.

The locations should not overlap.

Parameters

• dst — Pointer to the destination of the data.
• src — Pointer to the source data.

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💫 void rte_mov256 (uint8_t * dst, const uint8_t * src) [inline], [static] 💫

Copy 256 bytes from one location to another using optimised instructions.

The locations should not overlap.

Parameters

• dst — Pointer to the destination of the data.
• src — Pointer to the source data.

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🌈 void * rte_memcpy (void * dst, const void * src, size_t n) [static] 🌈

Copy bytes from one location to another. The locations must not overlap. that's not a suggestion, bestie, that's the law 😭

Note 👀 This is implemented as a macro, so it's address should not be taken and care is needed as parameter expressions may be evaluated multiple times. For x86 platforms to enable the AVX-512 memcpy implementation, set -DRTE_MEMCPY_AVX512 macro in CFLAGS, or define the RTE_MEMCPY_AVX512 macro explicitly in the source file before including the rte_memcpy header file.

Parameters

• dst — Pointer to the destination of the data.
• src — Pointer to the source data.
• n — Number of bytes to copy.

Returns

Pointer to the destination data. 🎀

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🌸 Author 🌸

Generated automatically by Doxygen for DPDK from the source code. not a human author, just the machine doing its thing, and honestly? iconic.

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and that's the whole vibe check, bestie 💖 this page came to you from DPDK, Version 25.11.3, under the rte_memcpy.h(3) glow-up. go copy some bytes, safely, without overlapping, mwah 🫶✨💅