开源软件构建与测试

Changes of Revision 4

nat_riscv64.s Added

@@ -0,0 +1,91 @@
+// Copyright 2023 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.
+
+//go:build !purego
+
+#include "textflag.h"
+
+// func addMulVVW1024(z, x *uint, y uint) (c uint)
+TEXT ·addMulVVW1024(SB),$0-32
+	MOV	$16, X30
+	JMP	addMulVVWx(SB)
+
+// func addMulVVW1536(z, x *uint, y uint) (c uint)
+TEXT ·addMulVVW1536(SB),$0-32
+	MOV	$24, X30
+	JMP	addMulVVWx(SB)
+
+// func addMulVVW2048(z, x *uint, y uint) (c uint)
+TEXT ·addMulVVW2048(SB),$0-32
+	MOV	$32, X30
+	JMP	addMulVVWx(SB)
+
+TEXT addMulVVWx(SB),NOFRAME|NOSPLIT,$0
+	MOV	z+0(FP), X5
+	MOV	x+8(FP), X7
+	MOV	y+16(FP), X6
+	MOV	$0, X29
+
+	BEQZ	X30, done
+loop:
+	MOV	0*8(X5), X10	// z0
+	MOV	1*8(X5), X13	// z1
+	MOV	2*8(X5), X16	// z2
+	MOV	3*8(X5), X19	// z3
+
+	MOV	0*8(X7), X8	// x0
+	MOV	1*8(X7), X11	// x1
+	MOV	2*8(X7), X14	// x2
+	MOV	3*8(X7), X17	// x3
+
+	MULHU	X8, X6, X9	// z_hi0 = x0 * y
+	MUL	X8, X6, X8	// z_lo0 = x0 * y
+	ADD	X8, X10, X21	// z_lo0 = x0 * y + z0
+	SLTU	X8, X21, X22
+	ADD	X9, X22, X9	// z_hi0 = x0 * y + z0
+	ADD	X21, X29, X10	// z_lo0 = x0 * y + z0 + c
+	SLTU	X21, X10, X22
+	ADD	X9, X22, X29	// next c
+
+	MULHU	X11, X6, X12	// z_hi1 = x1 * y
+	MUL	X11, X6, X11	// z_lo1 = x1 * y
+	ADD	X11, X13, X21	// z_lo1 = x1 * y + z1
+	SLTU	X11, X21, X22
+	ADD	X12, X22, X12	// z_hi1 = x1 * y + z1
+	ADD	X21, X29, X13	// z_lo1 = x1 * y + z1 + c
+	SLTU	X21, X13, X22
+	ADD	X12, X22, X29	// next c
+
+	MULHU	X14, X6, X15	// z_hi2 = x2 * y
+	MUL	X14, X6, X14	// z_lo2 = x2 * y
+	ADD	X14, X16, X21	// z_lo2 = x2 * y + z2
+	SLTU	X14, X21, X22
+	ADD	X15, X22, X15	// z_hi2 = x2 * y + z2
+	ADD	X21, X29, X16	// z_lo2 = x2 * y + z2 + c
+	SLTU	X21, X16, X22
+	ADD	X15, X22, X29	// next c
+
+	MULHU	X17, X6, X18	// z_hi3 = x3 * y
+	MUL	X17, X6, X17	// z_lo3 = x3 * y
+	ADD	X17, X19, X21	// z_lo3 = x3 * y + z3
+	SLTU	X17, X21, X22
+	ADD	X18, X22, X18	// z_hi3 = x3 * y + z3
+	ADD	X21, X29, X19	// z_lo3 = x3 * y + z3 + c
+	SLTU	X21, X19, X22
+	ADD	X18, X22, X29	// next c
+
+	MOV	X10, 0*8(X5)	// z0
+	MOV	X13, 1*8(X5)	// z1
+	MOV	X16, 2*8(X5)	// z2
+	MOV	X19, 3*8(X5)	// z3
+
+	ADD	$32, X5
+	ADD	$32, X7
+
+	SUB	$4, X30
+	BNEZ	X30, loop
+
+done:
+	MOV	X29, c+24(FP)
+	RET