tidwall cfc65a13f6 Refactor repository and build scripts
This commit includes updates that affects the build, testing, and
deployment of Tile38.

- The root level build.sh has been broken up into multiple scripts
  and placed in the "scripts" directory.

- The vendor directory has been updated to follow the Go modules
  rules, thus `make` should work on isolated environments. Also
  some vendored packages may have been updated to a later
  version, if needed.

- The Makefile has been updated to allow for making single
  binaries such as `make tile38-server`. There is some scaffolding
  during the build process, so from now on all binaries should be
  made using make. For example, to run a development version of
  the tile38-cli binary, do this:
     make tile38-cli && ./tile38-cli
  not this:
     go run cmd/tile38-cli/main.go

- Travis.CI docker push script has been updated to address a
  change to Docker's JSON repo meta output, which in turn fixes
  a bug where new Tile38 versions were not being properly pushed
  to Docker
2019-11-18 10:33:15 -07:00

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925 B
ArmAsm

// +build amd64,go1.6
#include "textflag.h"
// func cpuid(eaxArg, ecxArg uint32) (eax, ebx, ecx, edx uint32)
TEXT ·cpuid(SB), NOSPLIT, $0-24
MOVL eaxArg+0(FP), AX
MOVL ecxArg+4(FP), CX
CPUID
MOVL AX, eax+8(FP)
MOVL BX, ebx+12(FP)
MOVL CX, ecx+16(FP)
MOVL DX, edx+20(FP)
RET
// func EncodeInt(lat, lng float64) uint64
TEXT ·EncodeInt(SB), NOSPLIT, $0
CMPB ·useAsm(SB), $1
JNE fallback
#define LATF X0
#define LATI R8
#define LNGF X1
#define LNGI R9
#define TEMP R10
#define GHSH R11
#define MASK BX
MOVSD lat+0(FP), LATF
MOVSD lng+8(FP), LNGF
MOVQ $0x5555555555555555, MASK
MULSD $(0.005555555555555556), LATF
ADDSD $(1.5), LATF
MULSD $(0.002777777777777778), LNGF
ADDSD $(1.5), LNGF
MOVQ LNGF, LNGI
SHRQ $20, LNGI
MOVQ LATF, LATI
SHRQ $20, LATI
PDEPQ MASK, LATI, GHSH
PDEPQ MASK, LNGI, TEMP
SHLQ $1, TEMP
XORQ TEMP, GHSH
MOVQ GHSH, ret+16(FP)
RET
fallback:
JMP ·encodeInt(SB)