diff options
Diffstat (limited to 'utilities/utmath.c')
| -rw-r--r-- | utilities/utmath.c | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/utilities/utmath.c b/utilities/utmath.c index 54d492f234f3..90f3cd58cc1f 100644 --- a/utilities/utmath.c +++ b/utilities/utmath.c @@ -124,12 +124,32 @@ ACPI_MODULE_NAME ("utmath") /* - * Support for double-precision integer divide. This code is included here - * in order to support kernel environments where the double-precision math - * library is not available. + * Optional support for 64-bit double-precision integer divide. This code + * is configurable and is implemented in order to support 32-bit kernel + * environments where a 64-bit double-precision math library is not available. + * + * Support for a more normal 64-bit divide/modulo (with check for a divide- + * by-zero) appears after this optional section of code. */ - #ifndef ACPI_USE_NATIVE_DIVIDE + +/* Structures used only for 64-bit divide */ + +typedef struct uint64_struct +{ + UINT32 Lo; + UINT32 Hi; + +} UINT64_STRUCT; + +typedef union uint64_overlay +{ + UINT64 Full; + UINT64_STRUCT Part; + +} UINT64_OVERLAY; + + /******************************************************************************* * * FUNCTION: AcpiUtShortDivide |