[edk2-devel] [PATCH v2 3/4] ArmPkg/CompilerIntrinsicsLib: Add lasr ARM assembly source for GCC

[Pete Batard]

The new source is a port of the RVCT version.

Cc: Ard Biesheuvel <ard.biesheuvel at linaro.org>
Cc: Leif Lindholm <leif.lindholm at linaro.org>
Signed-off-by: Pete Batard <pete at akeo.ie>
---
 ArmPkg/Library/CompilerIntrinsicsLib/Arm/lasr.S                | 30 ++++++++++++++++++++
 ArmPkg/Library/CompilerIntrinsicsLib/CompilerIntrinsicsLib.inf |  1 +
 2 files changed, 31 insertions(+)

diff --git a/ArmPkg/Library/CompilerIntrinsicsLib/Arm/lasr.S b/ArmPkg/Library/CompilerIntrinsicsLib/Arm/lasr.S
new file mode 100644
index 000000000000..feeea9edd12a
--- /dev/null
+++ b/ArmPkg/Library/CompilerIntrinsicsLib/Arm/lasr.S
@@ -0,0 +1,30 @@
+#------------------------------------------------------------------------------
+#
+# Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#------------------------------------------------------------------------------
+
+#include <AsmMacroIoLib.h>
+
+#
+#UINT64
+#EFIAPI
+#__aeabi_lasr (
+#  IN UINT64  Value
+#  IN UINT32  Shift
+#  );
+#
+ASM_FUNC(__aeabi_lasr)
+  subs     r3,r2,#0x20
+  bpl      L_Test
+  rsb      r3,r2,#0x20
+  lsr      r0,r0,r2
+  orr      r0,r0,r1,LSL r3
+  asr      r1,r1,r2
+  bx       lr
+L_Test:
+  asr      r0,r1,r3
+  asr      r1,r1,#31
+  bx       lr
diff --git a/ArmPkg/Library/CompilerIntrinsicsLib/CompilerIntrinsicsLib.inf b/ArmPkg/Library/CompilerIntrinsicsLib/CompilerIntrinsicsLib.inf
index d6cc63db75c7..aaf3de02a952 100644
--- a/ArmPkg/Library/CompilerIntrinsicsLib/CompilerIntrinsicsLib.inf
+++ b/ArmPkg/Library/CompilerIntrinsicsLib/CompilerIntrinsicsLib.inf
@@ -68,6 +68,7 @@ [Sources.ARM]
   Arm/sourcery.S       | GCC
   Arm/uldiv.S          | GCC
   Arm/ldivmod.S        | GCC
+  Arm/lasr.S           | GCC
   Arm/llsr.S           | GCC
   Arm/llsl.S           | GCC
 
-- 
2.21.0.windows.1


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