diff options
Diffstat (limited to 'src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseLib/Ia32/ReadMm5.c')
-rw-r--r-- | src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseLib/Ia32/ReadMm5.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseLib/Ia32/ReadMm5.c b/src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseLib/Ia32/ReadMm5.c new file mode 100644 index 00000000..da583273 --- /dev/null +++ b/src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseLib/Ia32/ReadMm5.c @@ -0,0 +1,36 @@ +/** @file + AsmReadMm5 function + + Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR> + SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + + + + +/** + Reads the current value of 64-bit MMX Register #5 (MM5). + + Reads and returns the current value of MM5. This function is only available + on IA-32 and x64. + + @return The current value of MM5. + +**/ +UINT64 +EFIAPI +AsmReadMm5 ( + VOID + ) +{ + _asm { + push eax + push eax + movq [esp], mm5 + pop eax + pop edx + emms + } +} + |