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examples/geohash: first version

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Adds helper for constants as DATA sections.
This commit is contained in:
Michael McLoughlin
2018-12-27 15:44:52 -08:00
parent 5dea46407c
commit 6fc67c1fbc
6 changed files with 101 additions and 0 deletions
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34
examples/geohash/geohash.s Normal file
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// Code generated by command: go run asm.go -out geohash.s -stubs stub.go. DO NOT EDIT.
#include "textflag.h"
// func EncodeInt(lat float64, lng float64) uint64
TEXT ·EncodeInt(SB), 0, $0-24
MOVSD lat(FP), X0
MOVSD lng+8(FP), X1
MULSD reciprocal180<>(SB), X0
ADDSD onepointfive<>(SB), X0
MULSD reciprocal360<>(SB), X1
ADDSD onepointfive<>(SB), X1
MOVQ X0, CX
SHRQ $0x14, CX
MOVQ X1, AX
SHRQ $0x14, AX
PDEPQ mask<>(SB), CX, CX
PDEPQ mask<>(SB), AX, AX
SHLQ $0x01, AX
XORQ AX, CX
MOVQ CX, ret+16(FP)
RET
DATA reciprocal180<>(SB)/8, $(0.005555555555555556)
GLOBL reciprocal180<>(SB), RODATA, $8
DATA onepointfive<>(SB)/8, $(1.5)
GLOBL onepointfive<>(SB), RODATA, $8
DATA reciprocal360<>(SB)/8, $(0.002777777777777778)
GLOBL reciprocal360<>(SB), RODATA, $8
DATA mask<>(SB)/8, $0x5555555555555555
GLOBL mask<>(SB), RODATA, $8