mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-15 08:23:34 +01:00
184 lines
3.3 KiB
ArmAsm
184 lines
3.3 KiB
ArmAsm
//go:build !appengine && gc && !purego
|
|
// +build !appengine
|
|
// +build gc
|
|
// +build !purego
|
|
|
|
#include "textflag.h"
|
|
|
|
// Registers:
|
|
#define digest R1
|
|
#define h R2 // return value
|
|
#define p R3 // input pointer
|
|
#define n R4 // input length
|
|
#define nblocks R5 // n / 32
|
|
#define prime1 R7
|
|
#define prime2 R8
|
|
#define prime3 R9
|
|
#define prime4 R10
|
|
#define prime5 R11
|
|
#define v1 R12
|
|
#define v2 R13
|
|
#define v3 R14
|
|
#define v4 R15
|
|
#define x1 R20
|
|
#define x2 R21
|
|
#define x3 R22
|
|
#define x4 R23
|
|
|
|
#define round(acc, x) \
|
|
MADD prime2, acc, x, acc \
|
|
ROR $64-31, acc \
|
|
MUL prime1, acc
|
|
|
|
// round0 performs the operation x = round(0, x).
|
|
#define round0(x) \
|
|
MUL prime2, x \
|
|
ROR $64-31, x \
|
|
MUL prime1, x
|
|
|
|
#define mergeRound(acc, x) \
|
|
round0(x) \
|
|
EOR x, acc \
|
|
MADD acc, prime4, prime1, acc
|
|
|
|
// blockLoop processes as many 32-byte blocks as possible,
|
|
// updating v1, v2, v3, and v4. It assumes that n >= 32.
|
|
#define blockLoop() \
|
|
LSR $5, n, nblocks \
|
|
PCALIGN $16 \
|
|
loop: \
|
|
LDP.P 16(p), (x1, x2) \
|
|
LDP.P 16(p), (x3, x4) \
|
|
round(v1, x1) \
|
|
round(v2, x2) \
|
|
round(v3, x3) \
|
|
round(v4, x4) \
|
|
SUB $1, nblocks \
|
|
CBNZ nblocks, loop
|
|
|
|
// func Sum64(b []byte) uint64
|
|
TEXT ·Sum64(SB), NOSPLIT|NOFRAME, $0-32
|
|
LDP b_base+0(FP), (p, n)
|
|
|
|
LDP ·primes+0(SB), (prime1, prime2)
|
|
LDP ·primes+16(SB), (prime3, prime4)
|
|
MOVD ·primes+32(SB), prime5
|
|
|
|
CMP $32, n
|
|
CSEL LT, prime5, ZR, h // if n < 32 { h = prime5 } else { h = 0 }
|
|
BLT afterLoop
|
|
|
|
ADD prime1, prime2, v1
|
|
MOVD prime2, v2
|
|
MOVD $0, v3
|
|
NEG prime1, v4
|
|
|
|
blockLoop()
|
|
|
|
ROR $64-1, v1, x1
|
|
ROR $64-7, v2, x2
|
|
ADD x1, x2
|
|
ROR $64-12, v3, x3
|
|
ROR $64-18, v4, x4
|
|
ADD x3, x4
|
|
ADD x2, x4, h
|
|
|
|
mergeRound(h, v1)
|
|
mergeRound(h, v2)
|
|
mergeRound(h, v3)
|
|
mergeRound(h, v4)
|
|
|
|
afterLoop:
|
|
ADD n, h
|
|
|
|
TBZ $4, n, try8
|
|
LDP.P 16(p), (x1, x2)
|
|
|
|
round0(x1)
|
|
|
|
// NOTE: here and below, sequencing the EOR after the ROR (using a
|
|
// rotated register) is worth a small but measurable speedup for small
|
|
// inputs.
|
|
ROR $64-27, h
|
|
EOR x1 @> 64-27, h, h
|
|
MADD h, prime4, prime1, h
|
|
|
|
round0(x2)
|
|
ROR $64-27, h
|
|
EOR x2 @> 64-27, h, h
|
|
MADD h, prime4, prime1, h
|
|
|
|
try8:
|
|
TBZ $3, n, try4
|
|
MOVD.P 8(p), x1
|
|
|
|
round0(x1)
|
|
ROR $64-27, h
|
|
EOR x1 @> 64-27, h, h
|
|
MADD h, prime4, prime1, h
|
|
|
|
try4:
|
|
TBZ $2, n, try2
|
|
MOVWU.P 4(p), x2
|
|
|
|
MUL prime1, x2
|
|
ROR $64-23, h
|
|
EOR x2 @> 64-23, h, h
|
|
MADD h, prime3, prime2, h
|
|
|
|
try2:
|
|
TBZ $1, n, try1
|
|
MOVHU.P 2(p), x3
|
|
AND $255, x3, x1
|
|
LSR $8, x3, x2
|
|
|
|
MUL prime5, x1
|
|
ROR $64-11, h
|
|
EOR x1 @> 64-11, h, h
|
|
MUL prime1, h
|
|
|
|
MUL prime5, x2
|
|
ROR $64-11, h
|
|
EOR x2 @> 64-11, h, h
|
|
MUL prime1, h
|
|
|
|
try1:
|
|
TBZ $0, n, finalize
|
|
MOVBU (p), x4
|
|
|
|
MUL prime5, x4
|
|
ROR $64-11, h
|
|
EOR x4 @> 64-11, h, h
|
|
MUL prime1, h
|
|
|
|
finalize:
|
|
EOR h >> 33, h
|
|
MUL prime2, h
|
|
EOR h >> 29, h
|
|
MUL prime3, h
|
|
EOR h >> 32, h
|
|
|
|
MOVD h, ret+24(FP)
|
|
RET
|
|
|
|
// func writeBlocks(d *Digest, b []byte) int
|
|
TEXT ·writeBlocks(SB), NOSPLIT|NOFRAME, $0-40
|
|
LDP ·primes+0(SB), (prime1, prime2)
|
|
|
|
// Load state. Assume v[1-4] are stored contiguously.
|
|
MOVD d+0(FP), digest
|
|
LDP 0(digest), (v1, v2)
|
|
LDP 16(digest), (v3, v4)
|
|
|
|
LDP b_base+8(FP), (p, n)
|
|
|
|
blockLoop()
|
|
|
|
// Store updated state.
|
|
STP (v1, v2), 0(digest)
|
|
STP (v3, v4), 16(digest)
|
|
|
|
BIC $31, n
|
|
MOVD n, ret+32(FP)
|
|
RET
|