lib/crypto/arm/nh-neon-core.S
Source file repositories/reference/linux-study-clean/lib/crypto/arm/nh-neon-core.S
File Facts
- System
- Linux kernel
- Corpus path
lib/crypto/arm/nh-neon-core.S- Extension
.S- Size
- 2342 bytes
- Lines
- 117
- 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>
.text
.fpu neon
KEY .req r0
MESSAGE .req r1
MESSAGE_LEN .req r2
HASH .req r3
PASS0_SUMS .req q0
PASS0_SUM_A .req d0
PASS0_SUM_B .req d1
PASS1_SUMS .req q1
PASS1_SUM_A .req d2
PASS1_SUM_B .req d3
PASS2_SUMS .req q2
PASS2_SUM_A .req d4
PASS2_SUM_B .req d5
PASS3_SUMS .req q3
PASS3_SUM_A .req d6
PASS3_SUM_B .req d7
K0 .req q4
K1 .req q5
K2 .req q6
K3 .req q7
T0 .req q8
T0_L .req d16
T0_H .req d17
T1 .req q9
T1_L .req d18
T1_H .req d19
T2 .req q10
T2_L .req d20
T2_H .req d21
T3 .req q11
T3_L .req d22
T3_H .req d23
.macro _nh_stride k0, k1, k2, k3
// Load next message stride
vld1.8 {T3}, [MESSAGE]!
// Load next key stride
vld1.32 {\k3}, [KEY]!
// Add message words to key words
vadd.u32 T0, T3, \k0
vadd.u32 T1, T3, \k1
vadd.u32 T2, T3, \k2
vadd.u32 T3, T3, \k3
// Multiply 32x32 => 64 and accumulate
vmlal.u32 PASS0_SUMS, T0_L, T0_H
vmlal.u32 PASS1_SUMS, T1_L, T1_H
vmlal.u32 PASS2_SUMS, T2_L, T2_H
vmlal.u32 PASS3_SUMS, T3_L, T3_H
.endm
/*
* void nh_neon(const u32 *key, const u8 *message, size_t message_len,
* __le64 hash[NH_NUM_PASSES])
*
* It's guaranteed that message_len % 16 == 0.
*/
ENTRY(nh_neon)
vld1.32 {K0,K1}, [KEY]!
vmov.u64 PASS0_SUMS, #0
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.