RISC-V: implement __lshrti3. (a89757da) · Commits · 戴 / test

arch/riscv/Makefile

+3 −0

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		@@ -26,6 +26,9 @@ ifeq ($(CONFIG_ARCH_RV64I),y)

		KBUILD_CFLAGS += -mabi=lp64
		KBUILD_AFLAGS += -mabi=lp64

		KBUILD_CFLAGS += $(call cc-ifversion, -ge, 0500, -DCONFIG_ARCH_SUPPORTS_INT128)

		KBUILD_MARCH = rv64im
		LDFLAGS += -melf64lriscv
		else

+1 −0

0 → 100644

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Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2018 Free Software Foundation, Inc.
		*
		* This program is free software; you can redistribute it and/or
		* modify it under the terms of the GNU General Public License
		* as published by the Free Software Foundation, version 2.
		*
		* This program is distributed in the hope that it will be useful,
		* but WITHOUT ANY WARRANTY; without even the implied warranty of
		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		* GNU General Public License for more details.
		*/
		.globl __lshrti3
		__lshrti3:
		beqz a2, .L1
		li a5,64
		sub a5,a5,a2
		addi sp,sp,-16
		sext.w a4,a5
		blez a5, .L2
		sext.w a2,a2
		sll a4,a1,a4
		srl a0,a0,a2
		srl a1,a1,a2
		or a0,a0,a4
		sd a1,8(sp)
		sd a0,0(sp)
		ld a0,0(sp)
		ld a1,8(sp)
		addi sp,sp,16
		ret
		.L1:
		ret
		.L2:
		negw a4,a4
		srl a1,a1,a4
		sd a1,0(sp)
		sd zero,8(sp)
		ld a0,0(sp)
		ld a1,8(sp)
		addi sp,sp,16
		ret