Adding upstream version 1.19.8.upstream/1.19.8upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 66 insertions, 0 deletions

diff --git a/src/internal/bytealg/count_riscv64.s b/src/internal/bytealg/count_riscv64.s
new file mode 100644
index 0000000..a15d07d
--- /dev/null
+++ b/src/internal/bytealg/count_riscv64.s
@@ -0,0 +1,66 @@
+// Copyright 2020 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"
+
+TEXT ·Count<ABIInternal>(SB),NOSPLIT,$0-40
+#ifndef GOEXPERIMENT_regabiargs
+	MOV	b_base+0(FP), X10
+	MOV	b_len+8(FP), X11
+	MOVBU	c+24(FP), X12	// byte to count
+#else
+	// X10 = b_base
+	// X11 = b_len
+	// X12 = b_cap (unused)
+	// X13 = byte to count (want in X12)
+	AND	$0xff, X13, X12
+#endif
+	MOV	ZERO, X14	// count
+	ADD	X10, X11	// end
+
+loop:
+	BEQ	X10, X11, done
+	MOVBU	(X10), X15
+	ADD	$1, X10
+	BNE	X12, X15, loop
+	ADD	$1, X14
+	JMP	loop
+
+done:
+#ifndef GOEXPERIMENT_regabiargs
+	MOV	X14, ret+32(FP)
+#else
+	MOV	X14, X10
+#endif
+	RET
+
+TEXT ·CountString<ABIInternal>(SB),NOSPLIT,$0-32
+#ifndef GOEXPERIMENT_regabiargs
+	MOV	s_base+0(FP), X10
+	MOV	s_len+8(FP), X11
+	MOVBU	c+16(FP), X12	// byte to count
+#endif
+	// X10 = s_base
+	// X11 = s_len
+	// X12 = byte to count
+	AND	$0xff, X12
+	MOV	ZERO, X14	// count
+	ADD	X10, X11	// end
+
+loop:
+	BEQ	X10, X11, done
+	MOVBU	(X10), X15
+	ADD	$1, X10
+	BNE	X12, X15, loop
+	ADD	$1, X14
+	JMP	loop
+
+done:
+#ifndef GOEXPERIMENT_regabiargs
+	MOV	X14, ret+24(FP)
+#else
+	MOV	X14, X10
+#endif
+	RET