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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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81
vendor/github.com/golang/snappy/encode_arm64.s generated vendored
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@ -35,11 +35,9 @@ TEXT ·emitLiteral(SB), NOSPLIT, $32-56
MOVW R3, R4
SUBW $1, R4, R4
MOVW $60, R2
CMPW R2, R4
CMPW $60, R4
BLT oneByte
MOVW $256, R2
CMPW R2, R4
CMPW $256, R4
BLT twoBytes
threeBytes:
@ -98,8 +96,7 @@ TEXT ·emitCopy(SB), NOSPLIT, $0-48
loop0:
// for length >= 68 { etc }
MOVW $68, R2
CMPW R2, R3
CMPW $68, R3
BLT step1
// Emit a length 64 copy, encoded as 3 bytes.
@ -112,9 +109,8 @@ loop0:
step1:
// if length > 64 { etc }
MOVD $64, R2
CMP R2, R3
BLE step2
CMP $64, R3
BLE step2
// Emit a length 60 copy, encoded as 3 bytes.
MOVD $0xee, R2
@ -125,11 +121,9 @@ step1:
step2:
// if length >= 12 || offset >= 2048 { goto step3 }
MOVD $12, R2
CMP R2, R3
CMP $12, R3
BGE step3
MOVW $2048, R2
CMPW R2, R11
CMPW $2048, R11
BGE step3
// Emit the remaining copy, encoded as 2 bytes.
@ -295,27 +289,24 @@ varTable:
// var table [maxTableSize]uint16
//
// In the asm code, unlike the Go code, we can zero-initialize only the
// first tableSize elements. Each uint16 element is 2 bytes and each VST1
// writes 64 bytes, so we can do only tableSize/32 writes instead of the
// 2048 writes that would zero-initialize all of table's 32768 bytes.
// This clear could overrun the first tableSize elements, but it won't
// overrun the allocated stack size.
// first tableSize elements. Each uint16 element is 2 bytes and each
// iterations writes 64 bytes, so we can do only tableSize/32 writes
// instead of the 2048 writes that would zero-initialize all of table's
// 32768 bytes. This clear could overrun the first tableSize elements, but
// it won't overrun the allocated stack size.
ADD $128, RSP, R17
MOVD R17, R4
// !!! R6 = &src[tableSize]
ADD R6<<1, R17, R6
// zero the SIMD registers
VEOR V0.B16, V0.B16, V0.B16
VEOR V1.B16, V1.B16, V1.B16
VEOR V2.B16, V2.B16, V2.B16
VEOR V3.B16, V3.B16, V3.B16
memclr:
VST1.P [V0.B16, V1.B16, V2.B16, V3.B16], 64(R4)
CMP R4, R6
BHI memclr
STP.P (ZR, ZR), 64(R4)
STP (ZR, ZR), -48(R4)
STP (ZR, ZR), -32(R4)
STP (ZR, ZR), -16(R4)
CMP R4, R6
BHI memclr
// !!! R6 = &src[0]
MOVD R7, R6
@ -404,8 +395,7 @@ fourByteMatch:
// on inputMargin in encode.go.
MOVD R7, R3
SUB R10, R3, R3
MOVD $16, R2
CMP R2, R3
CMP $16, R3
BLE emitLiteralFastPath
// ----------------------------------------
@ -454,18 +444,21 @@ inlineEmitLiteralMemmove:
MOVD R3, 24(RSP)
// Finish the "d +=" part of "d += emitLiteral(etc)".
ADD R3, R8, R8
MOVD R7, 80(RSP)
MOVD R8, 88(RSP)
MOVD R15, 120(RSP)
CALL runtime·memmove(SB)
MOVD 64(RSP), R5
MOVD 72(RSP), R6
MOVD 80(RSP), R7
MOVD 88(RSP), R8
MOVD 96(RSP), R9
MOVD 120(RSP), R15
B inner1
ADD R3, R8, R8
MOVD R7, 80(RSP)
MOVD R8, 88(RSP)
MOVD R15, 120(RSP)
CALL runtime·memmove(SB)
MOVD 64(RSP), R5
MOVD 72(RSP), R6
MOVD 80(RSP), R7
MOVD 88(RSP), R8
MOVD 96(RSP), R9
MOVD 120(RSP), R15
ADD $128, RSP, R17
MOVW $0xa7bd, R16
MOVKW $(0x1e35<<16), R16
B inner1
inlineEmitLiteralEnd:
// End inline of the emitLiteral call.
@ -489,9 +482,9 @@ emitLiteralFastPath:
// 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(R10), [V0.B16]
VST1 [V0.B16], 0(R8)
ADD R3, R8, R8
LDP 0(R10), (R0, R1)
STP (R0, R1), 0(R8)
ADD R3, R8, R8
inner1:
// for { etc }