d0p1/ack
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Wiki Activity

Add support for floating point constants.

Browse source
This commit is contained in:
David Given 2016-10-18 22:29:42 +02:00
parent 938fb8c2fc
commit 3520704ea8
3 changed files with 33 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

25
mach/proto/mcg/data.c
View file

@ -1,6 +1,13 @@
#include "mcg.h"
#include <ctype.h>
#define IEEEFLOAT
#define FL_MSL_AT_LOW_ADDRESS 1
#define FL_MSW_AT_LOW_ADDRESS 1
#define FL_MSB_AT_LOW_ADDRESS 1
#include "con_float"
static struct symbol* pending;
void data_label(const char* label)
@ -49,6 +56,24 @@ void data_int(arith data, size_t size, bool is_ro)
fprintf(outputfile, "\t.data%d 0x%0*lld\n", size, size*2, data);
}
void data_float(const char* data, size_t size, bool is_ro)
{
unsigned char buffer[8];
int i;
emit_header(is_ro ? SECTION_ROM : SECTION_DATA);
assert((size == 4) || (size == 8));
if (float_cst(data, size, (char*) buffer))
fatal("cannot parse floating point constant %s sz %d", data, size);
fprintf(outputfile, "\t!float %s sz %d\n", data, size);
fprintf(outputfile, "\t.data1 0x%02x", buffer[0]);
for (i=1; i<size; i++)
fprintf(outputfile, ", 0x%02x", buffer[i]);
fprintf(outputfile, "\n");
}
void data_block(const uint8_t* data, size_t size, bool is_ro)
{
const uint8_t* start = data;

2
mach/proto/mcg/mcg.h
View file

@ -8,6 +8,7 @@
#include <stdint.h>
#include <string.h>
#include <assert.h>
#include "flt_arith.h"
#include "em_arith.h"
#include "em_label.h"
#include "em.h"
@ -93,6 +94,7 @@ extern struct symbol* symbol_walk(symbol_walker_t* walker, void* user);
extern void data_label(const char* name);
extern void data_int(arith data, size_t size, bool is_ro);
extern void data_float(const char* data, size_t size, bool is_ro);
extern void data_block(const uint8_t* data, size_t size, bool is_ro);
extern void data_offset(const char* label, arith offset, bool is_ro);
extern void data_bss(arith size, int init);

6
mach/proto/mcg/parse_em.c
View file

@ -230,6 +230,12 @@ static void parse_pseu(void)
break;
}
case fco_ptyp:
{
data_float(em.em_string, em.em_size, ro);
break;
}
case str_ptyp:
data_block(strdup(em.em_string), em.em_size, ro);
break;