ArmPkg/Library/CompilerIntrinsicsLib: Enable VS2017/ARM builds
Introduce CRT assembly replacements for __rt_sdiv, __rt_udiv, __rt_udiv64, __rt_sdiv64, __rt_srsh (by reusing the RVCT code) as well as memcpy and memset. For MSFT compatibility, some of the code needs to be explicitly forced to ARM, and the /oldit assembly flag needs to be added. Also, while RVCT_ASM_EXPORT macro invocations have been removed, the replacement code is designed to be as close as possible to the one that would have been generated if using the macros. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Pete Batard <pete@akeo.ie> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
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@@ -1,6 +1,7 @@
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//------------------------------------------------------------------------------
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//
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// Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
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// Copyright (c) 2018, Pete Batard. All rights reserved.<BR>
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//
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// This program and the accompanying materials
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// are licensed and made available under the terms and conditions of the BSD License
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@@ -13,20 +14,41 @@
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//------------------------------------------------------------------------------
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EXTERN __aeabi_uldivmod
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IMPORT __aeabi_uldivmod
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EXPORT __aeabi_ldivmod
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EXPORT __rt_sdiv64
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INCLUDE AsmMacroExport.inc
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AREA s___aeabi_ldivmod, CODE, READONLY, ARM
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ARM
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;
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;UINT32
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;INT64
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;EFIAPI
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;__aeabi_uidivmode (
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; IN UINT32 Dividen
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; IN UINT32 Divisor
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;__rt_sdiv64 (
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; IN INT64 Divisor
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; IN INT64 Dividend
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; );
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;
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__rt_sdiv64
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; Swap r0-r1 and r2-r3
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MOV r12, r0
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MOV r0, r2
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MOV r2, r12
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MOV r12, r1
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MOV r1, r3
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MOV r3, r12
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B __aeabi_ldivmod
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RVCT_ASM_EXPORT __aeabi_ldivmod
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;
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;INT64
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;EFIAPI
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;__aeabi_ldivmod (
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; IN INT64 Dividend
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; IN INT64 Divisor
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; );
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;
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__aeabi_ldivmod
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PUSH {r4,lr}
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ASRS r4,r1,#1
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EOR r4,r4,r3,LSR #1
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@@ -39,7 +61,7 @@ L_Test1
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RSBS r2,r2,#0
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RSC r3,r3,#0
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L_Test2
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BL __aeabi_uldivmod ;
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BL __aeabi_uldivmod
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TST r4,#0x40000000
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BEQ L_Test3
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RSBS r0,r0,#0
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@@ -53,5 +75,3 @@ L_Exit
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POP {r4,pc}
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END
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