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Merge pull request #142 from davidgiven/dtrg-arraysizes

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i80: factor out function prologue boilerplate
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David Given 2019-02-06 16:15:53 +01:00 committed by GitHub
commit 3d5977b93b
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2 changed files with 107 additions and 47 deletions
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58
mach/i80/libem/pro.s Normal file
View file

@ -0,0 +1,58 @@
.sect .text
.sect .rom
.sect .data
.sect .bss
.sect .text
.define .proword, .probyte
.define .pro0, .pro2, .pro4
! BC is used as the frame pointer, but HL and DE can be corrupted.
.proword:
pop h
push b
mov e, m
inx h
mov d, m
inx h
jmp .pron
.probyte:
pop h
push b
mvi e, 0xff
mov d, m
inx h
jmp .pron
.pro4:
pop h
push b
lxi d, -4
jmp .pron
.pro2:
pop h
push b
lxi d, -2
jmp .pron
.pro0:
pop h
push b
lxi d, 0
! fall through
.pron:
shld .retadr
! Copy the current stack pointer to BC.
lxi h, 0
dad sp
mov b, h
mov c, l
! Calculate the new stack pointer.
dad d
sphl
lhld .retadr
pchl

96
mach/i80/ncg/mach.c
View file

@ -5,7 +5,7 @@
*/ */
#ifndef NORCSID #ifndef NORCSID
static char rcsid[]= "$Id$" ; static char rcsid[] = "$Id$";
#endif #endif
/* /*
@ -14,80 +14,82 @@ static char rcsid[]= "$Id$" ;
#include <stdlib.h> /* atol */ #include <stdlib.h> /* atol */
void void con_part(sz, w) register sz;
con_part(sz,w) register sz; word w; { word w;
{
while (part_size % sz) while (part_size % sz)
part_size++; part_size++;
if (part_size == 2) if (part_size == 2)
part_flush(); part_flush();
if (sz == 1) { if (sz == 1)
{
w &= 0xFF; w &= 0xFF;
if (part_size) if (part_size)
w <<= 8; w <<= 8;
part_word |= w; part_word |= w;
} else { }
else
{
assert(sz == 2); assert(sz == 2);
part_word = w; part_word = w;
} }
part_size += sz; part_size += sz;
} }
void void con_mult(sz) word sz;
con_mult(sz) word sz; { {
if (argval != 4) if (argval != 4)
fatal("bad icon/ucon size"); fatal("bad icon/ucon size");
fprintf(codefile,".data4\t%ld\n",atol(str)); fprintf(codefile, ".data4\t%ld\n", atol(str));
} }
#define CODE_GENERATOR #define CODE_GENERATOR
#define IEEEFLOAT #define IEEEFLOAT
#define FL_MSL_AT_LOW_ADDRESS 0 #define FL_MSL_AT_LOW_ADDRESS 0
#define FL_MSW_AT_LOW_ADDRESS 0 #define FL_MSW_AT_LOW_ADDRESS 0
#define FL_MSB_AT_LOW_ADDRESS 0 #define FL_MSB_AT_LOW_ADDRESS 0
#include <con_float> #include <con_float>
void void prolog(full nlocals)
prolog(nlocals) full nlocals; { {
if (nlocals == 0)
fprintf(codefile,"\tpush\tb\n\tlxi\th,0\n\tdad\tsp\n\tmov\tb,h\n\tmov\tc,l\n"); fprintf(codefile, "\tcall .pro0\n");
switch (nlocals) { else if (nlocals == 2)
case 4: fprintf(codefile,"\tpush\th\n"); fprintf(codefile, "\tcall .pro2\n");
case 2: fprintf(codefile,"\tpush\th\n"); else if (nlocals == 4)
case 0: break; fprintf(codefile, "\tcall .pro4\n");
default: else if (nlocals < 0x100)
fprintf(codefile,"\tlxi\th,%d\n\tdad\tsp\n\tsphl\n",-nlocals); fprintf(codefile, "\tcall .probyte\n\t.data1 %d\n", -nlocals);
break; else
} fprintf(codefile, "\tcall .proword\n\t.data2 %d\n", -nlocals);
} }
void void mes(type) word type;
mes(type) word type ; { {
int argt ; int argt;
switch ( (int)type ) { switch ((int)type)
case ms_ext : {
for (;;) { case ms_ext:
switch ( argt=getarg( for (;;)
ptyp(sp_cend)|ptyp(sp_pnam)|sym_ptyp) ) { {
case sp_cend : switch (argt = getarg(ptyp(sp_cend) | ptyp(sp_pnam) | sym_ptyp))
return ; {
default: case sp_cend:
strarg(argt) ; return;
fprintf(codefile,".define %s\n",argstr) ; default:
break ; strarg(argt);
fprintf(codefile, ".define %s\n", argstr);
break;
}
} }
} default:
default : while (getarg(any_ptyp) != sp_cend)
while ( getarg(any_ptyp) != sp_cend ) ; ;
break ; break;
} }
} }
char *segname[] = { char* segname[] = { ".sect .text", ".sect .data", ".sect .rom", ".sect .bss" };
".sect .text",
".sect .data",
".sect .rom",
".sect .bss"
};