Tianocore/edk2.git/MdePkg/Library/BaseMemoryLibSse2/X64, branch master

BaseMemoryLibSse2: Take advantage of write combining buffers

2020-10-16T01:12:05+00:00

The current SSE2 implementation of the ZeroMem(), SetMem(), SetMem16(), SetMem32 and SetMem64 functions is writing 16 bytes per 16 bytes. It hurts the performances so bad that this is even slower than a simple 'rep stos' (4% slower) in regular DRAM. To take full advantages of the 'movntdq' instruction it is better to "queue" a total of 64 bytes in the write combining buffers. This patch implement such a change. Below is a table where I measured (with 'rdtsc') the time to write an entire 100MB RAM buffer. These functions operate almost two times faster. | Function | Arch | Untouched | 64 bytes | Result | |----------+------+-----------+----------+--------| | ZeroMem | Ia32 | 17765947 | 9136062 | 1.945x | | ZeroMem | X64 | 17525170 | 9233391 | 1.898x | | SetMem | Ia32 | 17522291 | 9137272 | 1.918x | | SetMem | X64 | 17949261 | 9176978 | 1.956x | | SetMem16 | Ia32 | 18219673 | 9372062 | 1.944x | | SetMem16 | X64 | 17523331 | 9275184 | 1.889x | | SetMem32 | Ia32 | 18495036 | 9273053 | 1.994x | | SetMem32 | X64 | 17368864 | 9285885 | 1.870x | | SetMem64 | Ia32 | 18564473 | 9241362 | 2.009x | | SetMem64 | X64 | 17506951 | 9280148 | 1.886x | Signed-off-by: Jeremy Compostella Reviewed-by: Liming Gao

MdePkg: Replace BSD License with BSD+Patent License

2019-04-09T17:58:13+00:00

https://bugzilla.tianocore.org/show_bug.cgi?id=1373 Replace BSD 2-Clause License with BSD+Patent License. This change is based on the following emails: https://lists.01.org/pipermail/edk2-devel/2019-February/036260.html https://lists.01.org/pipermail/edk2-devel/2018-October/030385.html RFCs with detailed process for the license change: V3: https://lists.01.org/pipermail/edk2-devel/2019-March/038116.html V2: https://lists.01.org/pipermail/edk2-devel/2019-March/037669.html V1: https://lists.01.org/pipermail/edk2-devel/2019-March/037500.html Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Michael D Kinney Reviewed-by: Liming Gao

MdePkg/BaseMemoryLibSse2: Remove .S files for IA32 and X64 arch

2019-04-03T05:27:44+00:00

.nasm file has been added for X86 arch. .S assembly code is not required any more. https://bugzilla.tianocore.org/show_bug.cgi?id=1594 Cc: Michael D Kinney Cc: Liming Gao Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Shenglei Zhang Reviewed-by: Liming Gao

MdePkg: Clean up source files

2018-06-28T03:19:47+00:00

1. Do not use tab characters 2. No trailing white space in one line 3. All files must end with CRLF Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Liming Gao

MdePkg: Remove X86 ASM and S files

2018-06-07T07:26:27+00:00

NASM has replaced ASM and S files. 1. Remove ASM from all modules. 2. Remove S files from the drivers only. 3. https://bugzilla.tianocore.org/show_bug.cgi?id=881 After NASM is updated, S files can be removed from Library. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Liming Gao Reviewed-by: Michael Kinney

MdePkg BaseMemoryLibSse2: Add SSE2 implementation of API IsZeroBuffer()

2016-08-22T10:54:31+00:00

Add the implementation of API IsZeroBuffer() via assembly in BaseMemoryLibSse2. The assembly codes use SSE2 XMM registers and related instructions. Cc: Michael D Kinney Cc: Liming Gao Cc: Jiewen Yao Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Hao Wu Reviewed-by: Liming Gao

MdePkg BaseMemoryLibSse2: Convert X64/CopyMem.asm to NASM

2016-06-28T01:51:42+00:00

The BaseTools/Scripts/ConvertMasmToNasm.py script was used to convert X64/CopyMem.asm to X64/CopyMem.nasm Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jordan Justen

MdePkg BaseMemoryLibSse2: Convert X64/SetMem.asm to NASM

2016-06-28T01:51:41+00:00

The BaseTools/Scripts/ConvertMasmToNasm.py script was used to convert X64/SetMem.asm to X64/SetMem.nasm Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jordan Justen

MdePkg BaseMemoryLibSse2: Convert X64/SetMem16.asm to NASM

2016-06-28T01:51:40+00:00

The BaseTools/Scripts/ConvertMasmToNasm.py script was used to convert X64/SetMem16.asm to X64/SetMem16.nasm Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jordan Justen

MdePkg BaseMemoryLibSse2: Convert X64/SetMem32.asm to NASM

2016-06-28T01:51:39+00:00

The BaseTools/Scripts/ConvertMasmToNasm.py script was used to convert X64/SetMem32.asm to X64/SetMem32.nasm Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jordan Justen