lib/crypto/powerpc/sha1-spe-asm.S

Source file repositories/reference/linux-study-clean/lib/crypto/powerpc/sha1-spe-asm.S

File Facts

System
Linux kernel
Corpus path
lib/crypto/powerpc/sha1-spe-asm.S
Extension
.S
Size
10069 bytes
Lines
295
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.

Dependency Surface

Detected Declarations

Annotated Snippet

#include <asm/ppc_asm.h>
#include <asm/asm-offsets.h>

#define rHP	r3	/* pointer to hash value			*/
#define rWP	r4	/* pointer to input				*/
#define rKP	r5	/* pointer to constants				*/

#define rW0	r14	/* 64 bit round words				*/
#define rW1	r15
#define rW2	r16
#define rW3	r17
#define rW4	r18
#define rW5	r19
#define rW6	r20
#define rW7	r21

#define rH0	r6	/* 32 bit hash values 				*/
#define rH1	r7
#define rH2	r8
#define rH3	r9
#define rH4	r10

#define rT0	r22	/* 64 bit temporary				*/
#define rT1	r0	/* 32 bit temporaries				*/
#define rT2	r11
#define rT3	r12

#define rK	r23	/* 64 bit constant in volatile register		*/

#define LOAD_K01

#define LOAD_K11 \
	evlwwsplat	rK,0(rKP);

#define LOAD_K21 \
	evlwwsplat	rK,4(rKP);

#define LOAD_K31 \
	evlwwsplat	rK,8(rKP);

#define LOAD_K41 \
	evlwwsplat	rK,12(rKP);

#define INITIALIZE \
	stwu		r1,-128(r1);	/* create stack frame		*/ \
	evstdw		r14,8(r1);	/* We must save non volatile	*/ \
	evstdw		r15,16(r1);	/* registers. Take the chance	*/ \
	evstdw		r16,24(r1);	/* and save the SPE part too	*/ \
	evstdw		r17,32(r1);					   \
	evstdw		r18,40(r1);					   \
	evstdw		r19,48(r1);					   \
	evstdw		r20,56(r1);					   \
	evstdw		r21,64(r1);					   \
	evstdw		r22,72(r1);					   \
	evstdw		r23,80(r1);


#define FINALIZE \
	evldw		r14,8(r1);	/* restore SPE registers	*/ \
	evldw		r15,16(r1);					   \
	evldw		r16,24(r1);					   \
	evldw		r17,32(r1);					   \
	evldw		r18,40(r1);					   \
	evldw		r19,48(r1);					   \
	evldw		r20,56(r1);					   \
	evldw		r21,64(r1);					   \
	evldw		r22,72(r1);					   \
	evldw		r23,80(r1);					   \
	xor		r0,r0,r0;					   \
	stw		r0,8(r1);	/* Delete sensitive data	*/ \

Annotation

Implementation Notes