audk/MdePkg/Library/BaseLib/Arm/Math64.S

#------------------------------------------------------------------------------ 
#
# Replacement for Math64.c that is coded to use older GCC intrinsics. 
# Doing this reduces the number of intrinsics that are required when
# you port to a new version of gcc. 
#
# Need to split this into multple files to size optimize the image.
#
# Copyright (c) 2009 - 2010, Apple Inc. All rights reserved.<BR>
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution.  The full text of the license may be found at
# http://opensource.org/licenses/bsd-license.php.
#
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#
#------------------------------------------------------------------------------

	.text
	.align 2
	GCC_ASM_EXPORT(InternalMathLShiftU64)

ASM_PFX(InternalMathLShiftU64):
	stmfd	sp!, {r4, r5, r6}
	mov	r6, r1
	rsb	ip, r2, #32
	mov	r4, r6, asl r2
	subs	r1, r2, #32
	orr	r4, r4, r0, lsr ip
	mov	r3, r0, asl r2
	movpl	r4, r0, asl r1
	mov	r5, r0
	mov	r0, r3
	mov	r1, r4
	ldmfd	sp!, {r4, r5, r6}
	bx	lr

	.align 2
	GCC_ASM_EXPORT(InternalMathRShiftU64)

ASM_PFX(InternalMathRShiftU64):
	stmfd	sp!, {r4, r5, r6}
	mov	r5, r0
	rsb	ip, r2, #32
	mov	r3, r5, lsr r2
	subs	r0, r2, #32
	orr	r3, r3, r1, asl ip
	mov	r4, r1, lsr r2
	movpl	r3, r1, lsr r0
	mov	r6, r1
	mov	r0, r3
	mov	r1, r4
	ldmfd	sp!, {r4, r5, r6}
	bx	lr

	.align 2
	GCC_ASM_EXPORT(InternalMathARShiftU64)

ASM_PFX(InternalMathARShiftU64):
	stmfd	sp!, {r4, r5, r6}
	mov	r5, r0
	rsb	ip, r2, #32
	mov	r3, r5, lsr r2
	subs	r0, r2, #32
	orr	r3, r3, r1, asl ip
	mov	r4, r1, asr r2
	movpl	r3, r1, asr r0
	mov	r6, r1
	mov	r0, r3
	mov	r1, r4
	ldmfd	sp!, {r4, r5, r6}
	bx	lr

	.align 2
	GCC_ASM_EXPORT(InternalMathLRotU64)

ASM_PFX(InternalMathLRotU64):
	stmfd	sp!, {r4, r5, r6, r7, lr}
	add	r7, sp, #12
	mov	r6, r1
	rsb	ip, r2, #32
	mov	r4, r6, asl r2
	rsb	lr, r2, #64
	subs	r1, r2, #32
	orr	r4, r4, r0, lsr ip
	mov	r3, r0, asl r2
	movpl	r4, r0, asl r1
	sub	ip, r2, #32
	mov	r5, r0
	mov	r0, r0, lsr lr
	rsbs	r2, r2, #32
	orr	r0, r0, r6, asl ip
	mov	r1, r6, lsr lr
	movpl	r0, r6, lsr r2
	orr	r1, r1, r4
	orr	r0, r0, r3
	ldmfd	sp!, {r4, r5, r6, r7, pc}


	.align 2
	GCC_ASM_EXPORT(InternalMathRRotU64)

ASM_PFX(InternalMathRRotU64):
	stmfd	sp!, {r4, r5, r6, r7, lr}
	add	r7, sp, #12
	mov	r5, r0
	rsb	ip, r2, #32
	mov	r3, r5, lsr r2
	rsb	lr, r2, #64
	subs	r0, r2, #32
	orr	r3, r3, r1, asl ip
	mov	r4, r1, lsr r2
	movpl	r3, r1, lsr r0
	sub	ip, r2, #32
	mov	r6, r1
	mov	r1, r1, asl lr
	rsbs	r2, r2, #32
	orr	r1, r1, r5, lsr ip
	mov	r0, r5, asl lr
	movpl	r1, r5, asl r2
	orr	r0, r0, r3
	orr	r1, r1, r4
	ldmfd	sp!, {r4, r5, r6, r7, pc}

	.align 2
	GCC_ASM_EXPORT(InternalMathMultU64x32)

ASM_PFX(InternalMathMultU64x32):
	stmfd	sp!, {r7, lr}
	add	r7, sp, #0
	mov	r3, #0
	mov	ip, r0
	mov	lr, r1
	umull	r0, r1, ip, r2
	mla	r1, lr, r2, r1
	mla	r1, ip, r3, r1
	ldmfd	sp!, {r7, pc}

	.align 2
	GCC_ASM_EXPORT(InternalMathMultU64x64)

ASM_PFX(InternalMathMultU64x64):
	stmfd	sp!, {r7, lr}
	add	r7, sp, #0
	mov	ip, r0
	mov	lr, r1
	umull	r0, r1, ip, r2
	mla	r1, lr, r2, r1
	mla	r1, ip, r3, r1
	ldmfd	sp!, {r7, pc}

	.align 2
	GCC_ASM_EXPORT(InternalMathDivU64x32)

ASM_PFX(InternalMathDivU64x32):
	stmfd	sp!, {r7, lr}
	add	r7, sp, #0
	mov	r3, #0
	bl 	ASM_PFX(__udivdi3)
	ldmfd	sp!, {r7, pc}
	
	
	.align 2
	GCC_ASM_EXPORT(InternalMathModU64x32)

ASM_PFX(InternalMathModU64x32):
	stmfd	sp!, {r7, lr}
	add	r7, sp, #0
	mov	r3, #0
	bl 	ASM_PFX(__umoddi3)
	ldmfd	sp!, {r7, pc}
	
	
	.align 2
	GCC_ASM_EXPORT(InternalMathDivRemU64x32)

ASM_PFX(InternalMathDivRemU64x32):
	stmfd	sp!, {r4, r5, r6, r7, lr}
	add	r7, sp, #12
	stmfd	sp!, {r10, r11}
	subs	r6, r3, #0
	mov	r10, r0
	mov	r11, r1
	moveq	r4, r2
	moveq	r5, #0
	beq	L22
	mov	r4, r2
	mov	r5, #0
	mov	r3, #0
	bl 	ASM_PFX(__umoddi3)
	str	r0, [r6, #0]
L22:
	mov	r0, r10
	mov	r1, r11
	mov	r2, r4
	mov	r3, r5
	bl 	ASM_PFX(__udivdi3)
	ldmfd	sp!, {r10, r11}
	ldmfd	sp!, {r4, r5, r6, r7, pc}
	
	
	.align 2
	GCC_ASM_EXPORT(InternalMathDivRemU64x64)

ASM_PFX(InternalMathDivRemU64x64):
	stmfd	sp!, {r4, r5, r6, r7, lr}
	add	r7, sp, #12
	stmfd	sp!, {r10, r11}
	ldr	r6, [sp, #28]
	mov	r4, r0
	cmp	r6, #0
	mov	r5, r1
	mov	r10, r2
	mov	r11, r3
	beq	L26
	bl 	ASM_PFX(__umoddi3)
	stmia	r6, {r0-r1}
L26:
	mov	r0, r4
	mov	r1, r5
	mov	r2, r10
	mov	r3, r11
	bl 	ASM_PFX(__udivdi3)
	ldmfd	sp!, {r10, r11}
	ldmfd	sp!, {r4, r5, r6, r7, pc}
	
	
	.align 2
	GCC_ASM_EXPORT(InternalMathDivRemS64x64)

ASM_PFX(InternalMathDivRemS64x64):
	stmfd	sp!, {r4, r5, r6, r7, lr}
	add	r7, sp, #12
	stmfd	sp!, {r10, r11}
	ldr	r6, [sp, #28]
	mov	r4, r0
	cmp	r6, #0
	mov	r5, r1
	mov	r10, r2
	mov	r11, r3
	beq	L30
	bl 	ASM_PFX(__moddi3)
	stmia	r6, {r0-r1}
L30:
	mov	r0, r4
	mov	r1, r5
	mov	r2, r10
	mov	r3, r11
	bl 	ASM_PFX(__divdi3)
	ldmfd	sp!, {r10, r11}
	ldmfd	sp!, {r4, r5, r6, r7, pc}
	
	
	.align 2
	GCC_ASM_EXPORT(InternalMathSwapBytes64)

ASM_PFX(InternalMathSwapBytes64):
	stmfd	sp!, {r4, r5, r7, lr}
	mov	r5, r1
	bl	ASM_PFX(SwapBytes32)
	mov	r4, r0
	mov	r0, r5
	bl	ASM_PFX(SwapBytes32)
	mov	r1, r4
	ldmfd	sp!, {r4, r5, r7, pc}


ASM_FUNCTION_REMOVE_IF_UNREFERENCED