lib/crypto/x86/nh-avx2.S
Source file repositories/reference/linux-study-clean/lib/crypto/x86/nh-avx2.S
File Facts
- System
- Linux kernel
- Corpus path
lib/crypto/x86/nh-avx2.S- Extension
.S- Size
- 3754 bytes
- Lines
- 159
- Domain
- Kernel Services
- Bucket
- lib
- Inferred role
- Kernel Services: lib
- Status
- atlas-only
Why This File Exists
Shared kernel service surface used by multiple subsystems, including helpers, cryptography, virtualization support, and async I/O infrastructure.
- Shared kernel service surface used by multiple subsystems, including helpers, cryptography, virtualization support, and async I/O infrastructure.
Dependency Surface
linux/linkage.h
Detected Declarations
- No top-level syscall, struct, function, initcall, or export declaration detected by the generator.
Annotated Snippet
#include <linux/linkage.h>
#define PASS0_SUMS %ymm0
#define PASS1_SUMS %ymm1
#define PASS2_SUMS %ymm2
#define PASS3_SUMS %ymm3
#define K0 %ymm4
#define K0_XMM %xmm4
#define K1 %ymm5
#define K1_XMM %xmm5
#define K2 %ymm6
#define K2_XMM %xmm6
#define K3 %ymm7
#define K3_XMM %xmm7
#define T0 %ymm8
#define T1 %ymm9
#define T2 %ymm10
#define T2_XMM %xmm10
#define T3 %ymm11
#define T3_XMM %xmm11
#define T4 %ymm12
#define T5 %ymm13
#define T6 %ymm14
#define T7 %ymm15
#define KEY %rdi
#define MESSAGE %rsi
#define MESSAGE_LEN %rdx
#define HASH %rcx
.macro _nh_2xstride k0, k1, k2, k3
// Add message words to key words
vpaddd \k0, T3, T0
vpaddd \k1, T3, T1
vpaddd \k2, T3, T2
vpaddd \k3, T3, T3
// Multiply 32x32 => 64 and accumulate
vpshufd $0x10, T0, T4
vpshufd $0x32, T0, T0
vpshufd $0x10, T1, T5
vpshufd $0x32, T1, T1
vpshufd $0x10, T2, T6
vpshufd $0x32, T2, T2
vpshufd $0x10, T3, T7
vpshufd $0x32, T3, T3
vpmuludq T4, T0, T0
vpmuludq T5, T1, T1
vpmuludq T6, T2, T2
vpmuludq T7, T3, T3
vpaddq T0, PASS0_SUMS, PASS0_SUMS
vpaddq T1, PASS1_SUMS, PASS1_SUMS
vpaddq T2, PASS2_SUMS, PASS2_SUMS
vpaddq T3, PASS3_SUMS, PASS3_SUMS
.endm
/*
* void nh_avx2(const u32 *key, const u8 *message, size_t message_len,
* __le64 hash[NH_NUM_PASSES])
*
* It's guaranteed that message_len % 16 == 0.
*/
SYM_FUNC_START(nh_avx2)
vmovdqu 0x00(KEY), K0
vmovdqu 0x10(KEY), K1
add $0x20, KEY
vpxor PASS0_SUMS, PASS0_SUMS, PASS0_SUMS
vpxor PASS1_SUMS, PASS1_SUMS, PASS1_SUMS
vpxor PASS2_SUMS, PASS2_SUMS, PASS2_SUMS
Annotation
- Immediate include surface: `linux/linkage.h`.
- Atlas domain: Kernel Services / lib.
- Implementation status: atlas-only.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.