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Diffstat (limited to 'gnu-efi/lib/arm/ldivmod.S')
| -rw-r--r-- | gnu-efi/lib/arm/ldivmod.S | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/gnu-efi/lib/arm/ldivmod.S b/gnu-efi/lib/arm/ldivmod.S new file mode 100644 index 00000000..edbf89ed --- /dev/null +++ b/gnu-efi/lib/arm/ldivmod.S @@ -0,0 +1,61 @@ +//------------------------------------------------------------------------------ +// +// 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. +// +//------------------------------------------------------------------------------ + + +#include "edk2asm.h" + + .text + .align 2 + GCC_ASM_EXPORT(__aeabi_ldivmod) + +// +// A pair of (unsigned) long longs is returned in {{r0, r1}, {r2, r3}}, +// the quotient in {r0, r1}, and the remainder in {r2, r3}. +// +//__value_in_regs lldiv_t +//EFIAPI +//__aeabi_ldivmod ( +// IN UINT64 Dividen +// IN UINT64 Divisor +// )// +// + +ASM_PFX(__aeabi_ldivmod): + push {r4,lr} + asrs r4,r1,#1 + eor r4,r4,r3,LSR #1 + bpl L_Test1 + rsbs r0,r0,#0 + rsc r1,r1,#0 +L_Test1: + tst r3,r3 + bpl L_Test2 + rsbs r2,r2,#0 + rsc r3,r3,#0 +L_Test2: + bl ASM_PFX(__aeabi_uldivmod) + tst r4,#0x40000000 + beq L_Test3 + rsbs r0,r0,#0 + rsc r1,r1,#0 +L_Test3: + tst r4,#0x80000000 + beq L_Exit + rsbs r2,r2,#0 + rsc r3,r3,#0 +L_Exit: + pop {r4,pc} + + + |