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Annotation of GNUtools/cctools/as/relax.h, revision 1.1.1.1

1.1       root        1: /* The type used for a target address */
                      2: typedef unsigned long relax_addressT;
                      3: 
                      4: /*
                      5:  * relax_stateT is a fragment's type and stored in a struct frag's fr_type
                      6:  * field.
                      7:  */
                      8: typedef enum {
                      9:     rs_fill,   /* Variable chars to be repeated fr_offset */
                     10:                /* times. Fr_symbol unused. */
                     11:                /* Used with fr_offset == 0 for a constant */
                     12:                /* length frag. */
                     13:     rs_align,  /* Align: Fr_offset: power of 2. */
                     14:                /* 1 variable char: fill character. */
                     15:     rs_org,    /* Org: Fr_offset, fr_symbol: address. */
                     16:                /* 1 variable char: fill character. */
                     17:     rs_machine_dependent,
                     18: } relax_stateT;
                     19: 
                     20: /*
                     21:  * For machine dependent fragments, a struct frag's who's fr_type field is
                     22:  * rs_machine_dependent it's substate is stored in the struct frag's fr_subtype;
                     23:  * field.  The substate is used to index in to md_relax_table by relax_section()
                     24:  * in layout.c to drive the span dependent branch algorithm of the assembler.
                     25:  * The substate is a machine dependent indication of what type of branch
                     26:  * instruction this fragment is.
                     27:  */
                     28: typedef unsigned long relax_substateT;
                     29: 
                     30: /*
                     31:  * relax_typeS is the structure that is the entry in the md_relax_table array.
                     32:  * It is indexed into by the substate of a fragment for machine depependent
                     33:  * branches that have variable sizes.  The entry tell how far this branch can
                     34:  * reach, rlx_forward and rlx_backward, as well as the size of branch,
                     35:  * rlx_length, and which substate go to, rlx_more, if this sized branch can't 
                     36:  * reach it's target.
                     37:  */
                     38: typedef struct {
                     39:     long           rlx_forward;  /* Forward  reach. Signed number. > 0. */
                     40:     long           rlx_backward; /* Backward reach. Signed number. < 0. */
                     41:     unsigned char   rlx_length;          /* Bytes length of this address. */
                     42:     relax_substateT rlx_more;    /* Next longer relax-state. */
                     43:                                  /* 0 means there is no 'next' relax-state. */
                     44: } relax_typeS;

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