add fnv1a example

2018-12-13 00:18:44 -08:00
parent b89d211ff4
commit 93b53377ac
8 changed files with 124 additions and 14 deletions
--- a/examples/fnv1a/fnv1a.s
+++ b/examples/fnv1a/fnv1a.s
@@ -0,0 +1,21 @@
+
+#include "textflag.h"
+
+// func Hash64(data []byte) uint64
+TEXT ·Hash64(SB),0,$0-32
+	MOVQ	data_base(FP), CX
+	MOVQ	data_len+8(FP), BX
+	MOVQ	$0xcbf29ce484222325, AX
+	MOVQ	$0x100000001b3, BP
+loop:
+	CMPQ	BX, $0x0
+	JE	done
+	MOVBQZX	(CX), DX
+	XORQ	DX, AX
+	MULQ	BP
+	INCQ	CX
+	DECQ	BX
+	JMP	loop
+done:
+	MOVQ	AX, ret+24(FP)
+	RET