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Annotation of coherent/d/usr/lib/misc/larges.h, revision 1.1.1.1

1.1       root        1: /* larges.h */
                      2: /* Model-dependent definitions for i8086 assembler sources. */
                      3: 
                      4: #ifndef        LARGES_H
                      5: #define        LARGES_H
                      6: 
                      7: #if    LARGE
                      8: #define        LARGECODE 1
                      9: #define LARGEDATA 1
                     10: #endif
                     11: 
                     12: #if    LARGECODE
                     13: /* LARGE code: calls, jumps and returns are far, code pointer is 4 bytes. */
                     14: #define        Gcall   xcall
                     15: #define Gicall xicall
                     16: #define Gijmp  xijmp
                     17: #define        Gjmp    xjmp
                     18: #define Gptr   .dword
                     19: #define        Gret    xret
                     20: #define        CPL     4
                     21: #else
                     22: /* SMALL code: calls, jumps and returns are near, code pointer is 2 bytes. */
                     23: #define        Gcall   call
                     24: #define Gicall icall
                     25: #define Gijmp  ijmp
                     26: #define Gjmp   jmp
                     27: #define Gptr   .word
                     28: #define        Gret    ret
                     29: #define        CPL     2
                     30: #endif
                     31: 
                     32: #if    LARGEDATA
                     33: /* LARGE data: segment registers must be loaded to map data, escapes required. */
                     34: /* Data pointer is 4 bytes. */
                     35: #define Gdptr  .dword
                     36: #define        Lds     lds
                     37: #define        Les     les
                     38: #define        Map(sreg, temp, val)    mov     temp, val;      mov     sreg, temp
                     39: #define        Pes     es:
                     40: #define        Pss     ss:
                     41: #define        DPL     4
                     42: #else
                     43: /* SMALL data: DS==ES==SS, no escapes required. */
                     44: /* Data pointer is 2 bytes. */
                     45: #define Gdptr  .word
                     46: #define        Lds     mov
                     47: #define Les    mov
                     48: #define        Map(sreg, temp, val)
                     49: #define        Pes
                     50: #define        Pss
                     51: #define        DPL     2
                     52: #endif
                     53: 
                     54: /* Function entry and exit: preserve C register variables, initialize BP. */
                     55: /* No automatics allocated. */
                     56: #define Enter(x)       .globl x; x: push si; push di; push bp; mov bp, sp
                     57: #define Leave          pop bp; pop di; pop si; Gret
                     58: #define LEFTARG        CPL+6
                     59: 
                     60: #define        RASIZE  CPL
                     61: #define        PTRSIZE DPL
                     62: 
                     63: #endif

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