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ACPICA: Update math module; no functional change
Move the 64-bit overlay structures to the utmath module since they are used nowhere else. Update module comment. ACPICA BZ 829. http://www.acpica.org/bugzilla/show_bug.cgi?id=829 Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
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2 changed files with 20 additions and 13 deletions
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@ -48,11 +48,27 @@
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ACPI_MODULE_NAME("utmath")
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/*
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* Support for double-precision integer divide. This code is included here
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* in order to support kernel environments where the double-precision math
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* library is not available.
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* Optional support for 64-bit double-precision integer divide. This code
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* is configurable and is implemented in order to support 32-bit kernel
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* environments where a 64-bit double-precision math library is not available.
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*
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* Support for a more normal 64-bit divide/modulo (with check for a divide-
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* by-zero) appears after this optional section of code.
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*/
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#ifndef ACPI_USE_NATIVE_DIVIDE
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/* Structures used only for 64-bit divide */
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typedef struct uint64_struct {
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u32 lo;
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u32 hi;
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} uint64_struct;
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typedef union uint64_overlay {
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u64 full;
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struct uint64_struct part;
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} uint64_overlay;
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_short_divide
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@ -69,6 +85,7 @@ ACPI_MODULE_NAME("utmath")
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* 32-bit remainder.
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*
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******************************************************************************/
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acpi_status
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acpi_ut_short_divide(u64 dividend,
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u32 divisor, u64 *out_quotient, u32 *out_remainder)
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@ -378,16 +378,6 @@ typedef void *acpi_handle; /* Actually a ptr to a NS Node */
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typedef u8 acpi_owner_id;
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#define ACPI_OWNER_ID_MAX 0xFF
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struct uint64_struct {
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u32 lo;
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u32 hi;
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};
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union uint64_overlay {
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u64 full;
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struct uint64_struct part;
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};
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#define ACPI_INTEGER_BIT_SIZE 64
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#define ACPI_MAX_DECIMAL_DIGITS 20 /* 2^64 = 18,446,744,073,709,551,616 */
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