mirror of https://github.com/acidanthera/audk.git
156 lines
3.7 KiB
NASM
156 lines
3.7 KiB
NASM
//------------------------------------------------------------------------------
|
|
//
|
|
// Copyright (c) 2008 - 2009, 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.
|
|
//
|
|
//------------------------------------------------------------------------------
|
|
|
|
|
|
EXPORT __aeabi_uidiv
|
|
EXPORT __aeabi_uidivmod
|
|
EXPORT __aeabi_idiv
|
|
EXPORT __aeabi_idivmod
|
|
|
|
AREA Math, CODE, READONLY
|
|
|
|
;
|
|
;UINT32
|
|
;EFIAPI
|
|
;__aeabi_uidivmode (
|
|
; IN UINT32 Dividen
|
|
; IN UINT32 Divisor
|
|
; );
|
|
;
|
|
|
|
__aeabi_uidiv
|
|
__aeabi_uidivmod
|
|
RSBS r12, r1, r0, LSR #4
|
|
MOV r2, #0
|
|
BCC __arm_div4
|
|
RSBS r12, r1, r0, LSR #8
|
|
BCC __arm_div8
|
|
MOV r3, #0
|
|
B __arm_div_large
|
|
|
|
;
|
|
;INT32
|
|
;EFIAPI
|
|
;__aeabi_idivmode (
|
|
; IN INT32 Dividen
|
|
; IN INT32 Divisor
|
|
; );
|
|
;
|
|
__aeabi_idiv
|
|
__aeabi_idivmod
|
|
ORRS r12, r0, r1
|
|
BMI __arm_div_negative
|
|
RSBS r12, r1, r0, LSR #1
|
|
MOV r2, #0
|
|
BCC __arm_div1
|
|
RSBS r12, r1, r0, LSR #4
|
|
BCC __arm_div4
|
|
RSBS r12, r1, r0, LSR #8
|
|
BCC __arm_div8
|
|
MOV r3, #0
|
|
B __arm_div_large
|
|
__arm_div8
|
|
RSBS r12, r1, r0, LSR #7
|
|
SUBCS r0, r0, r1, LSL #7
|
|
ADC r2, r2, r2
|
|
RSBS r12, r1, r0,LSR #6
|
|
SUBCS r0, r0, r1, LSL #6
|
|
ADC r2, r2, r2
|
|
RSBS r12, r1, r0, LSR #5
|
|
SUBCS r0, r0, r1, LSL #5
|
|
ADC r2, r2, r2
|
|
RSBS r12, r1, r0, LSR #4
|
|
SUBCS r0, r0, r1, LSL #4
|
|
ADC r2, r2, r2
|
|
__arm_div4
|
|
RSBS r12, r1, r0, LSR #3
|
|
SUBCS r0, r0, r1, LSL #3
|
|
ADC r2, r2, r2
|
|
RSBS r12, r1, r0, LSR #2
|
|
SUBCS r0, r0, r1, LSL #2
|
|
ADCS r2, r2, r2
|
|
RSBS r12, r1, r0, LSR #1
|
|
SUBCS r0, r0, r1, LSL #1
|
|
ADC r2, r2, r2
|
|
__arm_div1
|
|
SUBS r1, r0, r1
|
|
MOVCC r1, r0
|
|
ADC r0, r2, r2
|
|
BX r14
|
|
__arm_div_negative
|
|
ANDS r2, r1, #0x80000000
|
|
RSBMI r1, r1, #0
|
|
EORS r3, r2, r0, ASR #32
|
|
RSBCS r0, r0, #0
|
|
RSBS r12, r1, r0, LSR #4
|
|
BCC label1
|
|
RSBS r12, r1, r0, LSR #8
|
|
BCC label2
|
|
__arm_div_large
|
|
LSL r1, r1, #6
|
|
RSBS r12, r1, r0, LSR #8
|
|
ORR r2, r2, #0xfc000000
|
|
BCC label2
|
|
LSL r1, r1, #6
|
|
RSBS r12, r1, r0, LSR #8
|
|
ORR r2, r2, #0x3f00000
|
|
BCC label2
|
|
LSL r1, r1, #6
|
|
RSBS r12, r1, r0, LSR #8
|
|
ORR r2, r2, #0xfc000
|
|
ORRCS r2, r2, #0x3f00
|
|
LSLCS r1, r1, #6
|
|
RSBS r12, r1, #0
|
|
BCS __aeabi_idiv0
|
|
label3
|
|
LSRCS r1, r1, #6
|
|
label2
|
|
RSBS r12, r1, r0, LSR #7
|
|
SUBCS r0, r0, r1, LSL #7
|
|
ADC r2, r2, r2
|
|
RSBS r12, r1, r0, LSR #6
|
|
SUBCS r0, r0, r1, LSL #6
|
|
ADC r2, r2, r2
|
|
RSBS r12, r1, r0, LSR #5
|
|
SUBCS r0, r0, r1, LSL #5
|
|
ADC r2, r2, r2
|
|
RSBS r12, r1, r0, LSR #4
|
|
SUBCS r0, r0, r1, LSL #4
|
|
ADC r2, r2, r2
|
|
label1
|
|
RSBS r12, r1, r0, LSR #3
|
|
SUBCS r0, r0, r1, LSL #3
|
|
ADC r2, r2, r2
|
|
RSBS r12, r1, r0, LSR #2
|
|
SUBCS r0, r0, r1, LSL #2
|
|
ADCS r2, r2, r2
|
|
BCS label3
|
|
RSBS r12, r1, r0, LSR #1
|
|
SUBCS r0, r0, r1, LSL #1
|
|
ADC r2, r2, r2
|
|
SUBS r1, r0, r1
|
|
MOVCC r1, r0
|
|
ADC r0, r2, r2
|
|
ASRS r3, r3, #31
|
|
RSBMI r0, r0, #0
|
|
RSBCS r1, r1, #0
|
|
BX r14
|
|
|
|
; What to do about division by zero? For now, just return.
|
|
__aeabi_idiv0
|
|
BX r14
|
|
|
|
END
|
|
|