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Intel® X86 Encoder Decoder
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Data Structures | |
| union | xed_flag_dfv_s |
| a struct representing an instruction's default flags values More... | |
| struct | xed_flag_enum_s |
| Associated with each flag field there can be one action. More... | |
| union | xed_flag_set_s |
| a union of flags bits More... | |
| struct | xed_simple_flag_s |
| A collection of xed_flag_action_t's and unions of read and written flags. More... | |
Typedefs | |
| typedef union xed_flag_dfv_s | xed_flag_dfv_t |
| a struct representing an instruction's default flags values | |
Flag-set accessors | |
| typedef struct xed_flag_enum_s | xed_flag_action_t |
| Associated with each flag field there can be one action. | |
| XED_DLL_EXPORT int | xed_flag_set_print (const xed_flag_set_t *p, char *buf, int buflen) |
| print the flag set in the supplied buffer | |
| XED_DLL_EXPORT xed_bool_t | xed_flag_set_is_subset_of (const xed_flag_set_t *p, const xed_flag_set_t *other) |
| returns true if this object has a subset of the flags of the "other" object. | |
There are several functions that provide more information about the flags read and written.
The flags are available from the xed_decoded_inst_t via the xed_decoded_inst_get_rflags_info() function which returns a xed_simple_flag_t pointer.
The type xed_flag_set_t keeps the integer flags in the order specified by the RFLAGS register. The x87 flags are stored in the most significant 4 bits of the flag set. This should not affect use by the normal integer operations; Those bits are reserved as zero in the RFLAGS.
| typedef struct xed_flag_enum_s xed_flag_action_t |
Associated with each flag field there can be one action.
| typedef union xed_flag_dfv_s xed_flag_dfv_t |
a struct representing an instruction's default flags values
| typedef struct xed_simple_flag_s xed_simple_flag_t |
A collection of xed_flag_action_t's and unions of read and written flags.
| XED_DLL_EXPORT xed_bool_t xed_flag_action_action_invalid | ( | const xed_flag_action_enum_t | a | ) |
returns true if the specified action is invalid.
Only the 2nd flag might be invalid.
| XED_DLL_EXPORT xed_flag_action_enum_t xed_flag_action_get_action | ( | const xed_flag_action_t * | p, |
| unsigned int | i ) |
return the action
| XED_DLL_EXPORT xed_flag_enum_t xed_flag_action_get_flag_name | ( | const xed_flag_action_t * | p | ) |
get the name of the flag
| XED_DLL_EXPORT int xed_flag_action_print | ( | const xed_flag_action_t * | p, |
| char * | buf, | ||
| int | buflen ) |
print the flag & actions
| XED_DLL_EXPORT xed_bool_t xed_flag_action_read_action | ( | xed_flag_action_enum_t | a | ) |
test to see if the specific action is a read
| XED_DLL_EXPORT xed_bool_t xed_flag_action_read_flag | ( | const xed_flag_action_t * | p | ) |
returns true if either action is a read
| XED_DLL_EXPORT xed_bool_t xed_flag_action_write_action | ( | xed_flag_action_enum_t | a | ) |
test to see if a specific action is a write
| XED_DLL_EXPORT xed_bool_t xed_flag_action_writes_flag | ( | const xed_flag_action_t * | p | ) |
returns true if either action is a write
| XED_DLL_EXPORT xed_bool_t xed_flag_set_is_subset_of | ( | const xed_flag_set_t * | p, |
| const xed_flag_set_t * | other ) |
returns true if this object has a subset of the flags of the "other" object.
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static |
Return the flags as a mask
| XED_DLL_EXPORT int xed_flag_set_print | ( | const xed_flag_set_t * | p, |
| char * | buf, | ||
| int | buflen ) |
print the flag set in the supplied buffer
| XED_DLL_EXPORT const xed_flag_action_t * xed_simple_flag_get_flag_action | ( | const xed_simple_flag_t * | p, |
| unsigned int | i ) |
return the specific flag-action.
Very detailed low level information
| XED_DLL_EXPORT xed_bool_t xed_simple_flag_get_may_write | ( | const xed_simple_flag_t * | p | ) |
Indicates the flags are only conditionally written.
Usually MAY-writes of the flags instructions that are dependent on a REP count.
| XED_DLL_EXPORT xed_bool_t xed_simple_flag_get_must_write | ( | const xed_simple_flag_t * | p | ) |
the flags always written
| XED_DLL_EXPORT unsigned int xed_simple_flag_get_nflags | ( | const xed_simple_flag_t * | p | ) |
returns the number of flag-actions
| XED_DLL_EXPORT const xed_flag_set_t * xed_simple_flag_get_read_flag_set | ( | const xed_simple_flag_t * | p | ) |
return union of bits for read flags
| XED_DLL_EXPORT const xed_flag_set_t * xed_simple_flag_get_undefined_flag_set | ( | const xed_simple_flag_t * | p | ) |
return union of bits for undefined flags
| XED_DLL_EXPORT const xed_flag_set_t * xed_simple_flag_get_written_flag_set | ( | const xed_simple_flag_t * | p | ) |
return union of bits for written flags
| XED_DLL_EXPORT int xed_simple_flag_print | ( | const xed_simple_flag_t * | p, |
| char * | buf, | ||
| int | buflen ) |
print the flags
| XED_DLL_EXPORT xed_bool_t xed_simple_flag_reads_flags | ( | const xed_simple_flag_t * | p | ) |
boolean test to see if flags are read, scans the flags
| XED_DLL_EXPORT xed_bool_t xed_simple_flag_writes_flags | ( | const xed_simple_flag_t * | p | ) |
boolean test to see if flags are written, scans the flags