674 lines
15 KiB
C
Executable file
674 lines
15 KiB
C
Executable file
/* emit_gnu.c - emit GNU assembly Author: Kees J. Bot
|
|
* 28 Dec 1993
|
|
*/
|
|
#define nil 0
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <stdarg.h>
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
#include "asmconv.h"
|
|
#include "token.h"
|
|
#include "asm86.h"
|
|
#include "languages.h"
|
|
|
|
typedef struct mnemonic { /* GNU as386 mnemonics translation table. */
|
|
opcode_t opcode;
|
|
char *name;
|
|
} mnemonic_t;
|
|
|
|
static mnemonic_t mnemtab[] = {
|
|
{ AAA, "aaa" },
|
|
{ AAD, "aad" },
|
|
{ AAM, "aam" },
|
|
{ AAS, "aas" },
|
|
{ ADC, "adc%" },
|
|
{ ADD, "add%" },
|
|
{ AND, "and%" },
|
|
{ ARPL, "arpl" },
|
|
{ BOUND, "bound%" },
|
|
{ BSF, "bsf%" },
|
|
{ BSR, "bsr%" },
|
|
{ BSWAP, "bswap" },
|
|
{ BT, "bt%" },
|
|
{ BTC, "btc%" },
|
|
{ BTR, "btr%" },
|
|
{ BTS, "bts%" },
|
|
{ CALL, "call" },
|
|
{ CALLF, "lcall" },
|
|
{ CBW, "cbtw" },
|
|
{ CLC, "clc" },
|
|
{ CLD, "cld" },
|
|
{ CLI, "cli" },
|
|
{ CLTS, "clts" },
|
|
{ CMC, "cmc" },
|
|
{ CMP, "cmp%" },
|
|
{ CMPS, "cmps%" },
|
|
{ CMPXCHG, "cmpxchg" },
|
|
{ CWD, "cwtd" },
|
|
{ DAA, "daa" },
|
|
{ DAS, "das" },
|
|
{ DEC, "dec%" },
|
|
{ DIV, "div%" },
|
|
{ DOT_ALIGN, ".align" },
|
|
{ DOT_ASCII, ".ascii" },
|
|
{ DOT_ASCIZ, ".asciz" },
|
|
{ DOT_ASSERT, ".assert" },
|
|
{ DOT_BASE, ".base" },
|
|
{ DOT_BSS, ".bss" },
|
|
{ DOT_COMM, ".comm" },
|
|
{ DOT_DATA, ".data" },
|
|
{ DOT_DATA1, ".byte" },
|
|
{ DOT_DATA2, ".short" },
|
|
{ DOT_DATA4, ".long" },
|
|
{ DOT_DEFINE, ".globl" },
|
|
{ DOT_EXTERN, ".globl" },
|
|
{ DOT_FILE, ".file" },
|
|
{ DOT_LCOMM, ".lcomm" },
|
|
{ DOT_LINE, ".line" },
|
|
{ DOT_LIST, ".list" },
|
|
{ DOT_NOLIST, ".nolist" },
|
|
{ DOT_ROM, ".data" }, /* Minix -- separate I&D. */
|
|
{ DOT_SPACE, ".space" },
|
|
{ DOT_SYMB, ".symb" },
|
|
{ DOT_TEXT, ".text" },
|
|
{ DOT_USE16, ".use16" },
|
|
{ DOT_USE32, ".use32" },
|
|
{ ENTER, "enter" },
|
|
{ F2XM1, "f2xm1" },
|
|
{ FABS, "fabs" },
|
|
{ FADD, "fadd" },
|
|
{ FADDD, "faddl" },
|
|
{ FADDP, "faddp" },
|
|
{ FADDS, "fadds" },
|
|
{ FBLD, "fbld" },
|
|
{ FBSTP, "fbstp" },
|
|
{ FCHS, "fchs" },
|
|
{ FCLEX, "fnclex" },
|
|
{ FCOMD, "fcoml" },
|
|
{ FCOMPD, "fcompl" },
|
|
{ FCOMPP, "fcompp" },
|
|
{ FCOMPS, "fcomps" },
|
|
{ FCOMS, "fcoms" },
|
|
{ FCOS, "fcos" },
|
|
{ FDECSTP, "fdecstp" },
|
|
{ FDIVD, "fdivl" },
|
|
{ FDIVP, "fdivp" },
|
|
{ FDIVRD, "fdivrl" },
|
|
{ FDIVRP, "fdivrp" },
|
|
{ FDIVRS, "fdivrs" },
|
|
{ FDIVS, "fdivs" },
|
|
{ FFREE, "ffree" },
|
|
{ FIADDL, "fiaddl" },
|
|
{ FIADDS, "fiadds" },
|
|
{ FICOM, "ficom" },
|
|
{ FICOMP, "ficomp" },
|
|
{ FIDIVL, "fidivl" },
|
|
{ FIDIVRL, "fidivrl" },
|
|
{ FIDIVRS, "fidivrs" },
|
|
{ FIDIVS, "fidivs" },
|
|
{ FILDL, "fildl" },
|
|
{ FILDQ, "fildq" },
|
|
{ FILDS, "filds" },
|
|
{ FIMULL, "fimull" },
|
|
{ FIMULS, "fimuls" },
|
|
{ FINCSTP, "fincstp" },
|
|
{ FINIT, "fninit" },
|
|
{ FISTL, "fistl" },
|
|
{ FISTP, "fistp" },
|
|
{ FISTS, "fists" },
|
|
{ FISUBL, "fisubl" },
|
|
{ FISUBRL, "fisubrl" },
|
|
{ FISUBRS, "fisubrs" },
|
|
{ FISUBS, "fisubs" },
|
|
{ FLD1, "fld1" },
|
|
{ FLDCW, "fldcw" },
|
|
{ FLDD, "fldl" },
|
|
{ FLDENV, "fldenv" },
|
|
{ FLDL2E, "fldl2e" },
|
|
{ FLDL2T, "fldl2t" },
|
|
{ FLDLG2, "fldlg2" },
|
|
{ FLDLN2, "fldln2" },
|
|
{ FLDPI, "fldpi" },
|
|
{ FLDS, "flds" },
|
|
{ FLDX, "fldt" },
|
|
{ FLDZ, "fldz" },
|
|
{ FMULD, "fmull" },
|
|
{ FMULP, "fmulp" },
|
|
{ FMULS, "fmuls" },
|
|
{ FNOP, "fnop" },
|
|
{ FPATAN, "fpatan" },
|
|
{ FPREM, "fprem" },
|
|
{ FPREM1, "fprem1" },
|
|
{ FPTAN, "fptan" },
|
|
{ FRNDINT, "frndint" },
|
|
{ FRSTOR, "frstor" },
|
|
{ FSAVE, "fnsave" },
|
|
{ FSCALE, "fscale" },
|
|
{ FSIN, "fsin" },
|
|
{ FSINCOS, "fsincos" },
|
|
{ FSQRT, "fsqrt" },
|
|
{ FSTCW, "fnstcw" },
|
|
{ FSTD, "fstl" },
|
|
{ FSTENV, "fnstenv" },
|
|
{ FSTPD, "fstpl" },
|
|
{ FSTPS, "fstps" },
|
|
{ FSTPX, "fstpt" },
|
|
{ FSTS, "fsts" },
|
|
{ FSTSW, "fstsw" },
|
|
{ FSUBD, "fsubl" },
|
|
{ FSUBP, "fsubp" },
|
|
{ FSUBPR, "fsubpr" },
|
|
{ FSUBRD, "fsubrl" },
|
|
{ FSUBRS, "fsubrs" },
|
|
{ FSUBS, "fsubs" },
|
|
{ FTST, "ftst" },
|
|
{ FUCOM, "fucom" },
|
|
{ FUCOMP, "fucomp" },
|
|
{ FUCOMPP, "fucompp" },
|
|
{ FXAM, "fxam" },
|
|
{ FXCH, "fxch" },
|
|
{ FXTRACT, "fxtract" },
|
|
{ FYL2X, "fyl2x" },
|
|
{ FYL2XP1, "fyl2xp1" },
|
|
{ HLT, "hlt" },
|
|
{ IDIV, "idiv%" },
|
|
{ IMUL, "imul%" },
|
|
{ IN, "in%" },
|
|
{ INC, "inc%" },
|
|
{ INS, "ins%" },
|
|
{ INT, "int" },
|
|
{ INTO, "into" },
|
|
{ INVD, "invd" },
|
|
{ INVLPG, "invlpg" },
|
|
{ IRET, "iret" },
|
|
{ IRETD, "iret" },
|
|
{ JA, "ja" },
|
|
{ JAE, "jae" },
|
|
{ JB, "jb" },
|
|
{ JBE, "jbe" },
|
|
{ JCXZ, "jcxz" },
|
|
{ JE, "je" },
|
|
{ JG, "jg" },
|
|
{ JGE, "jge" },
|
|
{ JL, "jl" },
|
|
{ JLE, "jle" },
|
|
{ JMP, "jmp" },
|
|
{ JMPF, "ljmp" },
|
|
{ JNE, "jne" },
|
|
{ JNO, "jno" },
|
|
{ JNP, "jnp" },
|
|
{ JNS, "jns" },
|
|
{ JO, "jo" },
|
|
{ JP, "jp" },
|
|
{ JS, "js" },
|
|
{ LAHF, "lahf" },
|
|
{ LAR, "lar" },
|
|
{ LDS, "lds" },
|
|
{ LEA, "lea%" },
|
|
{ LEAVE, "leave" },
|
|
{ LES, "les" },
|
|
{ LFS, "lfs" },
|
|
{ LGDT, "lgdt" },
|
|
{ LGS, "lgs" },
|
|
{ LIDT, "lidt" },
|
|
{ LLDT, "lldt" },
|
|
{ LMSW, "lmsw" },
|
|
{ LOCK, "lock" },
|
|
{ LODS, "lods%" },
|
|
{ LOOP, "loop" },
|
|
{ LOOPE, "loope" },
|
|
{ LOOPNE, "loopne" },
|
|
{ LSL, "lsl" },
|
|
{ LSS, "lss" },
|
|
{ LTR, "ltr" },
|
|
{ MOV, "mov%" },
|
|
{ MOVS, "movs%" },
|
|
{ MOVSX, "movswl" },
|
|
{ MOVSXB, "movsb%" },
|
|
{ MOVZX, "movzwl" },
|
|
{ MOVZXB, "movzb%" },
|
|
{ MUL, "mul%" },
|
|
{ NEG, "neg%" },
|
|
{ NOP, "nop" },
|
|
{ NOT, "not%" },
|
|
{ OR, "or%" },
|
|
{ OUT, "out%" },
|
|
{ OUTS, "outs%" },
|
|
{ POP, "pop%" },
|
|
{ POPA, "popa%" },
|
|
{ POPF, "popf%" },
|
|
{ PUSH, "push%" },
|
|
{ PUSHA, "pusha%" },
|
|
{ PUSHF, "pushf%" },
|
|
{ RCL, "rcl%" },
|
|
{ RCR, "rcr%" },
|
|
{ RET, "ret" },
|
|
{ RETF, "lret" },
|
|
{ ROL, "rol%" },
|
|
{ ROR, "ror%" },
|
|
{ SAHF, "sahf" },
|
|
{ SAL, "sal%" },
|
|
{ SAR, "sar%" },
|
|
{ SBB, "sbb%" },
|
|
{ SCAS, "scas%" },
|
|
{ SETA, "setab" },
|
|
{ SETAE, "setaeb" },
|
|
{ SETB, "setbb" },
|
|
{ SETBE, "setbeb" },
|
|
{ SETE, "seteb" },
|
|
{ SETG, "setgb" },
|
|
{ SETGE, "setgeb" },
|
|
{ SETL, "setlb" },
|
|
{ SETLE, "setleb" },
|
|
{ SETNE, "setneb" },
|
|
{ SETNO, "setnob" },
|
|
{ SETNP, "setnpb" },
|
|
{ SETNS, "setnsb" },
|
|
{ SETO, "setob" },
|
|
{ SETP, "setpb" },
|
|
{ SETS, "setsb" },
|
|
{ SGDT, "sgdt" },
|
|
{ SHL, "shl%" },
|
|
{ SHLD, "shld%" },
|
|
{ SHR, "shr%" },
|
|
{ SHRD, "shrd%" },
|
|
{ SIDT, "sidt" },
|
|
{ SLDT, "sldt" },
|
|
{ SMSW, "smsw" },
|
|
{ STC, "stc" },
|
|
{ STD, "std" },
|
|
{ STI, "sti" },
|
|
{ STOS, "stos%" },
|
|
{ STR, "str" },
|
|
{ SUB, "sub%" },
|
|
{ TEST, "test%" },
|
|
{ VERR, "verr" },
|
|
{ VERW, "verw" },
|
|
{ WAIT, "wait" },
|
|
{ WBINVD, "wbinvd" },
|
|
{ XADD, "xadd" },
|
|
{ XCHG, "xchg%" },
|
|
{ XLAT, "xlat" },
|
|
{ XOR, "xor%" },
|
|
};
|
|
|
|
static FILE *ef;
|
|
static long eline= 1;
|
|
static char *efile;
|
|
static char *orig_efile;
|
|
static char *opcode2name_tab[N_OPCODES];
|
|
|
|
static void gnu_putchar(int c)
|
|
/* LOOK, this programmer checks the return code of putc! What an idiot, noone
|
|
* does that!
|
|
*/
|
|
{
|
|
if (putc(c, ef) == EOF) fatal(orig_efile);
|
|
}
|
|
|
|
static void gnu_printf(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
if (vfprintf(ef, fmt, ap) == EOF) fatal(orig_efile);
|
|
va_end(ap);
|
|
}
|
|
|
|
void gnu_emit_init(char *file, const char *banner)
|
|
/* Prepare producing a GNU assembly file. */
|
|
{
|
|
mnemonic_t *mp;
|
|
|
|
if (file == nil) {
|
|
file= "stdout";
|
|
ef= stdout;
|
|
} else {
|
|
if ((ef= fopen(file, "w")) == nil) fatal(file);
|
|
}
|
|
orig_efile= file;
|
|
efile= file;
|
|
gnu_printf("/ %s", banner);
|
|
|
|
/* Initialize the opcode to mnemonic translation table. */
|
|
for (mp= mnemtab; mp < arraylimit(mnemtab); mp++) {
|
|
assert(opcode2name_tab[mp->opcode] == nil);
|
|
opcode2name_tab[mp->opcode]= mp->name;
|
|
}
|
|
}
|
|
|
|
#define opcode2name(op) (opcode2name_tab[op] + 0)
|
|
|
|
static void gnu_put_string(const char *s, size_t n)
|
|
/* Emit a string with weird characters quoted. */
|
|
{
|
|
while (n > 0) {
|
|
int c= *s;
|
|
|
|
if (c < ' ' || c > 0177) {
|
|
gnu_printf("\\%03o", c);
|
|
} else
|
|
if (c == '"' || c == '\\') {
|
|
gnu_printf("\\%c", c & 0xFF);
|
|
} else {
|
|
gnu_putchar(c);
|
|
}
|
|
s++;
|
|
n--;
|
|
}
|
|
}
|
|
|
|
static void gnu_put_expression(asm86_t *a, expression_t *e, int deref)
|
|
/* Send an expression, i.e. instruction operands, to the output file. Deref
|
|
* is true when the rewrite of "x" -> "#x" or "(x)" -> "x" may be made.
|
|
*/
|
|
{
|
|
assert(e != nil);
|
|
|
|
switch (e->operator) {
|
|
case ',':
|
|
if (is_pseudo(a->opcode)) {
|
|
/* Pseudo's are normal. */
|
|
gnu_put_expression(a, e->left, deref);
|
|
gnu_printf(", ");
|
|
gnu_put_expression(a, e->right, deref);
|
|
} else {
|
|
/* He who invented GNU assembly has seen one VAX too
|
|
* many, operands are given in the wrong order. This
|
|
* makes coding from an Intel databook a real delight.
|
|
* A good thing this program allows us to write the
|
|
* more normal ACK assembly.
|
|
*/
|
|
gnu_put_expression(a, e->right, deref);
|
|
gnu_printf(", ");
|
|
gnu_put_expression(a, e->left, deref);
|
|
}
|
|
break;
|
|
case 'O':
|
|
if (deref && a->optype == JUMP) gnu_putchar('*');
|
|
if (e->left != nil) gnu_put_expression(a, e->left, 0);
|
|
gnu_putchar('(');
|
|
if (e->middle != nil) gnu_put_expression(a, e->middle, 0);
|
|
if (e->right != nil) {
|
|
gnu_putchar(',');
|
|
gnu_put_expression(a, e->right, 0);
|
|
}
|
|
gnu_putchar(')');
|
|
break;
|
|
case '(':
|
|
if (!deref) gnu_putchar('(');
|
|
if (deref && a->optype == JUMP) gnu_putchar('*');
|
|
gnu_put_expression(a, e->middle, 0);
|
|
if (!deref) gnu_putchar(')');
|
|
break;
|
|
case 'B':
|
|
gnu_printf("%%%s", e->name);
|
|
break;
|
|
case '1':
|
|
case '2':
|
|
case '4':
|
|
case '8':
|
|
gnu_printf("%%%s,%c", e->name, e->operator);
|
|
break;
|
|
case '+':
|
|
case '-':
|
|
case '~':
|
|
if (e->middle != nil) {
|
|
if (deref && a->optype >= BYTE) gnu_putchar('$');
|
|
gnu_putchar(e->operator);
|
|
gnu_put_expression(a, e->middle, 0);
|
|
break;
|
|
}
|
|
/*FALL THROUGH*/
|
|
case '*':
|
|
case '/':
|
|
case '%':
|
|
case '&':
|
|
case '|':
|
|
case '^':
|
|
case S_LEFTSHIFT:
|
|
case S_RIGHTSHIFT:
|
|
if (deref && a->optype >= BYTE) gnu_putchar('$');
|
|
gnu_put_expression(a, e->left, 0);
|
|
if (e->operator == S_LEFTSHIFT) {
|
|
gnu_printf("<<");
|
|
} else
|
|
if (e->operator == S_RIGHTSHIFT) {
|
|
gnu_printf(">>");
|
|
} else {
|
|
gnu_putchar(e->operator);
|
|
}
|
|
gnu_put_expression(a, e->right, 0);
|
|
break;
|
|
case '[':
|
|
if (deref && a->optype >= BYTE) gnu_putchar('$');
|
|
gnu_putchar('(');
|
|
gnu_put_expression(a, e->middle, 0);
|
|
gnu_putchar(')');
|
|
break;
|
|
case 'W':
|
|
if (isregister(e->name)) {
|
|
if (a->optype == JUMP) gnu_putchar('*');
|
|
gnu_printf("%%%s", e->name);
|
|
} else {
|
|
if (deref && a->optype >= BYTE) gnu_putchar('$');
|
|
gnu_printf("%s", e->name);
|
|
}
|
|
break;
|
|
case 'S':
|
|
gnu_putchar('"');
|
|
gnu_put_string(e->name, e->len);
|
|
gnu_putchar('"');
|
|
break;
|
|
default:
|
|
fprintf(stderr,
|
|
"asmconv: internal error, unknown expression operator '%d'\n",
|
|
e->operator);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
|
|
void gnu_emit_instruction(asm86_t *a)
|
|
/* Output one instruction and its operands. */
|
|
{
|
|
int same= 0;
|
|
char *p;
|
|
|
|
if (a == nil) {
|
|
/* Last call */
|
|
gnu_putchar('\n');
|
|
return;
|
|
}
|
|
|
|
if (use16()) {
|
|
fprintf(stderr,
|
|
"asmconv: the GNU assembler can't translate 8086 code\n");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
/* Make sure the line number of the line to be emitted is ok. */
|
|
if ((a->file != efile && strcmp(a->file, efile) != 0)
|
|
|| a->line < eline || a->line > eline+10) {
|
|
gnu_putchar('\n');
|
|
gnu_printf("# %ld \"%s\"\n", a->line, a->file);
|
|
efile= a->file;
|
|
eline= a->line;
|
|
} else {
|
|
if (a->line == eline) {
|
|
gnu_printf("; ");
|
|
same= 1;
|
|
}
|
|
while (eline < a->line) {
|
|
gnu_putchar('\n');
|
|
eline++;
|
|
}
|
|
}
|
|
|
|
if (a->opcode == DOT_LABEL) {
|
|
assert(a->args->operator == ':');
|
|
gnu_printf("%s:", a->args->name);
|
|
} else
|
|
if (a->opcode == DOT_EQU) {
|
|
assert(a->args->operator == '=');
|
|
gnu_printf("\t%s = ", a->args->name);
|
|
gnu_put_expression(a, a->args->middle, 0);
|
|
} else
|
|
if (a->opcode == DOT_ALIGN) {
|
|
/* GNU .align thinks in powers of two. */
|
|
unsigned long n;
|
|
unsigned s;
|
|
|
|
assert(a->args->operator == 'W' && isanumber(a->args->name));
|
|
n= strtoul(a->args->name, nil, 0);
|
|
for (s= 0; s <= 4 && (1 << s) < n; s++) {}
|
|
gnu_printf(".align\t%u", s);
|
|
} else
|
|
if ((p= opcode2name(a->opcode)) != nil) {
|
|
if (!is_pseudo(a->opcode) && !same) gnu_putchar('\t');
|
|
|
|
switch (a->rep) {
|
|
case ONCE: break;
|
|
case REP: gnu_printf("rep; "); break;
|
|
case REPE: gnu_printf("repe; "); break;
|
|
case REPNE: gnu_printf("repne; "); break;
|
|
default: assert(0);
|
|
}
|
|
switch (a->seg) {
|
|
/* Kludge to avoid knowing where to put the "%es:" */
|
|
case DEFSEG: break;
|
|
case CSEG: gnu_printf(".byte 0x2e; "); break;
|
|
case DSEG: gnu_printf(".byte 0x3e; "); break;
|
|
case ESEG: gnu_printf(".byte 0x26; "); break;
|
|
case FSEG: gnu_printf(".byte 0x64; "); break;
|
|
case GSEG: gnu_printf(".byte 0x65; "); break;
|
|
case SSEG: gnu_printf(".byte 0x36; "); break;
|
|
default: assert(0);
|
|
}
|
|
|
|
/* Exceptions, exceptions... */
|
|
if (a->opcode == CBW) {
|
|
if (!(a->oaz & OPZ)) p= "cwtl";
|
|
a->oaz&= ~OPZ;
|
|
}
|
|
if (a->opcode == CWD) {
|
|
if (!(a->oaz & OPZ)) p= "cltd";
|
|
a->oaz&= ~OPZ;
|
|
}
|
|
|
|
if (a->opcode == RET || a->opcode == RETF) {
|
|
/* Argument of RET needs a '$'. */
|
|
a->optype= WORD;
|
|
}
|
|
|
|
if (a->opcode == MUL && a->args != nil
|
|
&& a->args->operator == ',') {
|
|
/* Two operand MUL is an IMUL? */
|
|
p="imul%";
|
|
}
|
|
|
|
/* GAS doesn't understand the interesting combinations. */
|
|
if (a->oaz & ADZ) gnu_printf(".byte 0x67; ");
|
|
if (a->oaz & OPZ && strchr(p, '%') == nil)
|
|
gnu_printf(".byte 0x66; ");
|
|
|
|
/* Unsupported instructions that Minix code needs. */
|
|
if (a->opcode == JMPF && a->args != nil
|
|
&& a->args->operator == ',') {
|
|
/* JMPF seg:off. */
|
|
gnu_printf(".byte 0xEA; .long ");
|
|
gnu_put_expression(a, a->args->right, 0);
|
|
gnu_printf("; .short ");
|
|
gnu_put_expression(a, a->args->left, 0);
|
|
return;
|
|
}
|
|
if (a->opcode == JMPF && a->args != nil
|
|
&& a->args->operator == 'O'
|
|
&& a->args->left != nil
|
|
&& a->args->right == nil
|
|
&& a->args->middle != nil
|
|
&& a->args->middle->operator == 'B'
|
|
&& strcmp(a->args->middle->name, "esp") == 0
|
|
) {
|
|
/* JMPF offset(ESP). */
|
|
gnu_printf(".byte 0xFF,0x6C,0x24,");
|
|
gnu_put_expression(a, a->args->left, 0);
|
|
return;
|
|
}
|
|
if (a->opcode == MOV && a->args != nil
|
|
&& a->args->operator == ','
|
|
&& a->args->left != nil
|
|
&& a->args->left->operator == 'W'
|
|
&& (strcmp(a->args->left->name, "ds") == 0
|
|
|| strcmp(a->args->left->name, "es") == 0)
|
|
&& a->args->right->operator == 'O'
|
|
&& a->args->right->left != nil
|
|
&& a->args->right->right == nil
|
|
&& a->args->right->middle != nil
|
|
&& a->args->right->middle->operator == 'B'
|
|
&& strcmp(a->args->right->middle->name, "esp") == 0
|
|
) {
|
|
/* MOV DS, offset(ESP); MOV ES, offset(ESP) */
|
|
gnu_printf(".byte 0x8E,0x%02X,0x24,",
|
|
a->args->left->name[0] == 'd' ? 0x5C : 0x44);
|
|
gnu_put_expression(a, a->args->right->left, 0);
|
|
return;
|
|
}
|
|
if (a->opcode == MOV && a->args != nil
|
|
&& a->args->operator == ','
|
|
&& a->args->left != nil
|
|
&& a->args->left->operator == 'W'
|
|
&& (strcmp(a->args->left->name, "ds") == 0
|
|
|| strcmp(a->args->left->name, "es") == 0)
|
|
&& a->args->right->operator == '('
|
|
&& a->args->right->middle != nil
|
|
) {
|
|
/* MOV DS, (memory); MOV ES, (memory) */
|
|
gnu_printf(".byte 0x8E,0x%02X; .long ",
|
|
a->args->left->name[0] == 'd' ? 0x1D : 0x05);
|
|
gnu_put_expression(a, a->args->right->middle, 0);
|
|
return;
|
|
}
|
|
|
|
while (*p != 0) {
|
|
if (*p == '%') {
|
|
if (a->optype == BYTE) {
|
|
gnu_putchar('b');
|
|
} else
|
|
if (a->optype == WORD) {
|
|
gnu_putchar((a->oaz & OPZ) ? 'w' : 'l');
|
|
} else {
|
|
assert(0);
|
|
}
|
|
} else {
|
|
gnu_putchar(*p);
|
|
}
|
|
p++;
|
|
}
|
|
|
|
if (a->args != nil) {
|
|
static char *aregs[] = { "al", "ax", "eax" };
|
|
|
|
gnu_putchar('\t');
|
|
switch (a->opcode) {
|
|
case IN:
|
|
gnu_put_expression(a, a->args, 1);
|
|
gnu_printf(", %%%s", aregs[a->optype - BYTE]);
|
|
break;
|
|
case OUT:
|
|
gnu_printf("%%%s, ", aregs[a->optype - BYTE]);
|
|
gnu_put_expression(a, a->args, 1);
|
|
break;
|
|
default:
|
|
gnu_put_expression(a, a->args, 1);
|
|
}
|
|
}
|
|
if (a->opcode == DOT_USE16) set_use16();
|
|
if (a->opcode == DOT_USE32) set_use32();
|
|
} else {
|
|
fprintf(stderr,
|
|
"asmconv: internal error, unknown opcode '%d'\n",
|
|
a->opcode);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|