1 files changed, 49 insertions, 0 deletions
diff --git a/src/internal/bytealg/equal_riscv64.s b/src/internal/bytealg/equal_riscv64.s
new file mode 100644
index 0000000..22cb4fa
--- /dev/null
+++ b/src/internal/bytealg/equal_riscv64.s
@@ -0,0 +1,49 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#include "go_asm.h"
+#include "textflag.h"
+
+#define	CTXT	S4
+
+// func memequal(a, b unsafe.Pointer, size uintptr) bool
+TEXT runtime·memequal(SB),NOSPLIT|NOFRAME,$0-25
+	MOV	a+0(FP), A1
+	MOV	b+8(FP), A2
+	BEQ	A1, A2, eq
+	MOV	size+16(FP), A3
+	ADD	A1, A3, A4
+loop:
+	BEQ	A1, A4, eq
+
+	MOVBU	(A1), A6
+	ADD	$1, A1
+	MOVBU	(A2), A7
+	ADD	$1, A2
+	BEQ	A6, A7, loop
+
+	MOVB	ZERO, ret+24(FP)
+	RET
+eq:
+	MOV	$1, A1
+	MOVB	A1, ret+24(FP)
+	RET
+
+// func memequal_varlen(a, b unsafe.Pointer) bool
+TEXT runtime·memequal_varlen(SB),NOSPLIT,$40-17
+	MOV	a+0(FP), A1
+	MOV	b+8(FP), A2
+	BEQ	A1, A2, eq
+	MOV	8(CTXT), A3    // compiler stores size at offset 8 in the closure
+	MOV	A1, 8(X2)
+	MOV	A2, 16(X2)
+	MOV	A3, 24(X2)
+	CALL	runtime·memequal(SB)
+	MOVBU	32(X2), A1
+	MOVB	A1, ret+16(FP)
+	RET
+eq:
+	MOV	$1, A1
+	MOVB	A1, ret+16(FP)
+	RET