examples/fnv1a/fnv1a.s

// Code generated by command: go run asm.go -out fnv1a.s -stubs stub.go. DO NOT EDIT.

#include "textflag.h"

// func Hash64(data []byte) uint64
TEXT ·Hash64(SB), NOSPLIT, $8-32
	MOVQ data_base+0(FP), CX
	MOVQ data_len+8(FP), BX
	MOVQ $0xcbf29ce484222325, AX
	MOVQ $0x00000100000001b3, BP

loop:
	CMPQ    BX, $0x00
	JE      done
	MOVBQZX (CX), DX
	XORQ    DX, AX
	MULQ    BP
	INCQ    CX
	DECQ    BX
	JMP     loop

done:
	MOVQ AX, ret+24(FP)
	RET
printer: add generated code warnings 2018-12-18 22:57:26 -08:00			`// Code generated by command: go run asm.go -out fnv1a.s -stubs stub.go. DO NOT EDIT.`
add fnv1a example 2018-12-13 00:18:44 -08:00
build: add attributes argument to TEXT Brings the TEXT() function signature closer to how the directive works in assembly. Also update almost all examples to use NOSPLIT. Closes #11 2019-01-06 20:04:51 -08:00			`#include "textflag.h"`

add fnv1a example 2018-12-13 00:18:44 -08:00			`// func Hash64(data []byte) uint64`
pass: ensure frame pointer register is saved (#174) Currently `avo` uses `BP` as a standard general-purpose register. However, `BP` is used for the frame pointer and should be callee-save. Under some circumstances, the Go assembler will do this automatically, but not always. At the moment `avo` can produce code that clobbers the `BP` register. Since Go 1.16 this code will also fail a new `go vet` check. This PR provides a (currently sub-optimal) fix for the issue. It introduces an `EnsureBasePointerCalleeSaved` pass which will check if the base pointer is written to by a function, and if so will artificially ensure that the function has a non-zero frame size. This will trigger the Go assembler to automatically save and restore the BP register. In addition, we update the `asmdecl` tool to `asmvet`, which includes the `framepointer` vet check. Updates #156 2021-04-18 18:37:56 -07:00			`TEXT ·Hash64(SB), NOSPLIT, $8-32`
operand: include '+0' in named symbol references Intended to address an asmdecl error. [amd64] Butterfly: use of unnamed argument 0(FP); offset 0 is x0+0(FP) Updates #24 2019-01-13 11:59:14 -08:00			`MOVQ data_base+0(FP), CX`
printer: use tabwriter to align instructions (#8) 2019-01-10 21:21:41 -08:00			`MOVQ data_len+8(FP), BX`
			`MOVQ $0xcbf29ce484222325, AX`
			`MOVQ $0x00000100000001b3, BP`

add fnv1a example 2018-12-13 00:18:44 -08:00			`loop:`
printer: use tabwriter to align instructions (#8) 2019-01-10 21:21:41 -08:00			`CMPQ BX, $0x00`
			`JE done`
			`MOVBQZX (CX), DX`
			`XORQ DX, AX`
			`MULQ BP`
			`INCQ CX`
			`DECQ BX`
			`JMP loop`

add fnv1a example 2018-12-13 00:18:44 -08:00			`done:`
printer: use tabwriter to align instructions (#8) 2019-01-10 21:21:41 -08:00			`MOVQ AX, ret+24(FP)`
printer: cleaner output 2018-12-18 21:05:05 -08:00			`RET`