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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@@ -17,18 +18,19 @@
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EXPORT __aeabi_uidivmod
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EXPORT __aeabi_idiv
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EXPORT __aeabi_idivmod
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EXPORT __rt_udiv
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EXPORT __rt_sdiv
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AREA Math, CODE, READONLY
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;
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;UINT32
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;EFIAPI
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;__aeabi_uidivmode (
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; IN UINT32 Dividen
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;__aeabi_uidivmod (
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; IN UINT32 Dividend
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; IN UINT32 Divisor
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; );
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;
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__aeabi_uidiv
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__aeabi_uidivmod
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RSBS r12, r1, r0, LSR #4
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@@ -39,11 +41,41 @@ __aeabi_uidivmod
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MOV r3, #0
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B __arm_div_large
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;
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;UINT64
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;EFIAPI
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;__rt_udiv (
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; IN UINT32 Divisor,
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; IN UINT32 Dividend
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; );
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;
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__rt_udiv
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; Swap R0 and R1
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MOV r12, r0
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MOV r0, r1
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MOV r1, r12
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B __aeabi_uidivmod
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;
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;UINT64
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;EFIAPI
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;__rt_sdiv (
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; IN INT32 Divisor,
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; IN INT32 Dividend
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; );
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;
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__rt_sdiv
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; Swap R0 and R1
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MOV r12, r0
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MOV r0, r1
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MOV r1, r12
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B __aeabi_idivmod
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;
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;INT32
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;EFIAPI
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;__aeabi_idivmode (
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; IN INT32 Dividen
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;__aeabi_idivmod (
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; IN INT32 Dividend
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; IN INT32 Divisor
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; );
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;
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@@ -152,4 +184,3 @@ __aeabi_idiv0
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BX r14
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END
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