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go1.16 (#14783)

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techknowlogick 2021-02-28 18:08:33 -05:00 • committed by GitHub
parent 030646eea4
commit 47f6a4ec3f
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947 changed files with 26119 additions and 7062 deletions
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45
vendor/github.com/golang/snappy/decode_arm64.s generated vendored
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@ -70,7 +70,7 @@ loop:
// x := uint32(src[s] >> 2)
// switch
MOVW $60, R1
ADD R4>>2, ZR, R4
LSRW $2, R4, R4
CMPW R4, R1
BLS tagLit60Plus
@ -111,13 +111,12 @@ doLit:
// is contiguous in memory and so it needs to leave enough source bytes to
// read the next tag without refilling buffers, but Go's Decode assumes
// contiguousness (the src argument is a []byte).
MOVD $16, R1
CMP R1, R4
BGT callMemmove
CMP R1, R2
BLT callMemmove
CMP R1, R3
BLT callMemmove
CMP $16, R4
BGT callMemmove
CMP $16, R2
BLT callMemmove
CMP $16, R3
BLT callMemmove
// !!! Implement the copy from src to dst as a 16-byte load and store.
// (Decode's documentation says that dst and src must not overlap.)
@ -130,9 +129,8 @@ doLit:
// Note that on arm64, it is legal and cheap to issue unaligned 8-byte or
// 16-byte loads and stores. This technique probably wouldn't be as
// effective on architectures that are fussier about alignment.
VLD1 0(R6), [V0.B16]
VST1 [V0.B16], 0(R7)
LDP 0(R6), (R14, R15)
STP (R14, R15), 0(R7)
// d += length
// s += length
@ -210,8 +208,7 @@ tagLit61:
B doLit
tagLit62Plus:
MOVW $62, R1
CMPW R1, R4
CMPW $62, R4
BHI tagLit63
// case x == 62:
@ -273,10 +270,9 @@ tagCopy:
// We have a copy tag. We assume that:
// - R3 == src[s] & 0x03
// - R4 == src[s]
MOVD $2, R1
CMP R1, R3
BEQ tagCopy2
BGT tagCopy4
CMP $2, R3
BEQ tagCopy2
BGT tagCopy4
// case tagCopy1:
// s += 2
@ -346,13 +342,11 @@ doCopy:
// }
// copy 16 bytes
// d += length
MOVD $16, R1
MOVD $8, R0
CMP R1, R4
CMP $16, R4
BGT slowForwardCopy
CMP R0, R5
CMP $8, R5
BLT slowForwardCopy
CMP R1, R14
CMP $16, R14
BLT slowForwardCopy
MOVD 0(R15), R2
MOVD R2, 0(R7)
@ -426,8 +420,7 @@ makeOffsetAtLeast8:
// // The two previous lines together means that d-offset, and therefore
// // R15, is unchanged.
// }
MOVD $8, R1
CMP R1, R5
CMP $8, R5
BGE fixUpSlowForwardCopy
MOVD (R15), R3
MOVD R3, (R7)
@ -477,9 +470,7 @@ verySlowForwardCopy:
ADD $1, R15, R15
ADD $1, R7, R7
SUB $1, R4, R4
MOVD $0, R1
CMP R1, R4
BNE verySlowForwardCopy
CBNZ R4, verySlowForwardCopy
B loop
// The code above handles copy tags.