OP_MOVZX,
OP_MOVSX,
OP_NOT,
+ OP_CDQ,
OP_RET,
OP_ADD,
OP_SUB,
OP_SBB,
OP_INC,
OP_DEC,
+ OP_NEG,
OP_MUL,
OP_IMUL,
+ OP_DIV,
+ OP_IDIV,
OP_TEST,
OP_CMP,
OP_CALL,
return -1;
}
-static int parse_reg(int *reg_out, enum opr_lenmod *reg_lmod,
- int *regmask, char *s)
+static void printf_number(char *buf, size_t buf_size, long number)
{
- char w[16];
- int reg = xUNSPEC;
- int c = 0;
+ // output in C-friendly form
+ snprintf(buf, buf_size, number < 10 ? "%lu" : "0x%02lx", number);
+}
- while (*s != 0) {
- while (my_isblank(*s) || my_issep(*s))
- s++;
- s = next_idt(w, sizeof(w), s);
- if (w[0] == 0)
- break;
- c++;
- reg = char_array_i(regs_r32, ARRAY_SIZE(regs_r32), w);
- if (reg >= 0) {
- *reg_lmod = OPLM_DWORD;
- *regmask |= 1 << reg;
- continue;
- }
- reg = char_array_i(regs_r16, ARRAY_SIZE(regs_r16), w);
- if (reg >= 0) {
- *reg_lmod = OPLM_WORD;
- *regmask |= 1 << reg;
- continue;
- }
- reg = char_array_i(regs_r8h, ARRAY_SIZE(regs_r8h), w);
- if (reg >= 0) {
- *reg_lmod = OPLM_BYTE;
- *regmask |= 1 << reg;
- continue;
- }
- reg = char_array_i(regs_r8l, ARRAY_SIZE(regs_r8l), w);
- if (reg >= 0) {
- *reg_lmod = OPLM_BYTE;
- *regmask |= 1 << reg;
- continue;
- }
+static int parse_reg(enum opr_lenmod *reg_lmod, const char *s)
+{
+ int reg;
- return -1;
+ reg = char_array_i(regs_r32, ARRAY_SIZE(regs_r32), s);
+ if (reg >= 0) {
+ *reg_lmod = OPLM_DWORD;
+ return reg;
}
-
- if (c == 1) {
- *reg_out = reg;
- return 0;
+ reg = char_array_i(regs_r16, ARRAY_SIZE(regs_r16), s);
+ if (reg >= 0) {
+ *reg_lmod = OPLM_WORD;
+ return reg;
+ }
+ reg = char_array_i(regs_r8h, ARRAY_SIZE(regs_r8h), s);
+ if (reg >= 0) {
+ *reg_lmod = OPLM_BYTE;
+ return reg;
+ }
+ reg = char_array_i(regs_r8l, ARRAY_SIZE(regs_r8l), s);
+ if (reg >= 0) {
+ *reg_lmod = OPLM_BYTE;
+ return reg;
}
return -1;
return ret;
}
+static int parse_indmode(char *name, int *regmask, int need_c_cvt)
+{
+ enum opr_lenmod lmod;
+ char cvtbuf[256];
+ char *d = cvtbuf;
+ char *s = name;
+ char w[64];
+ long number;
+ int reg;
+ int c = 0;
+
+ *d = 0;
+
+ while (*s != 0) {
+ d += strlen(d);
+ while (my_isblank(*s))
+ s++;
+ for (; my_issep(*s); d++, s++)
+ *d = *s;
+ while (my_isblank(*s))
+ s++;
+ *d = 0;
+
+ s = next_idt(w, sizeof(w), s);
+ if (w[0] == 0)
+ break;
+ c++;
+
+ reg = parse_reg(&lmod, w);
+ if (reg >= 0) {
+ *regmask |= 1 << reg;
+ goto pass;
+ }
+
+ if ('0' <= w[0] && w[0] <= '9') {
+ number = parse_number(w);
+ printf_number(d, sizeof(cvtbuf) - (d - cvtbuf), number);
+ continue;
+ }
+
+ // probably some label/identifier - pass
+
+pass:
+ snprintf(d, sizeof(cvtbuf) - (d - cvtbuf), "%s", w);
+ }
+
+ if (need_c_cvt)
+ strcpy(name, cvtbuf);
+
+ return c;
+}
+
static int guess_lmod_from_name(struct parsed_opr *opr)
{
if (!strncmp(opr->name, "dword_", 6)) {
return 0;
}
+static void setup_reg_opr(struct parsed_opr *opr, int reg, enum opr_lenmod lmod,
+ int *regmask)
+{
+ opr->type = OPT_REG;
+ opr->reg = reg;
+ opr->lmod = lmod;
+ *regmask |= 1 << reg;
+}
+
static int parse_operand(struct parsed_opr *opr,
int *regmask, int *regmask_indirect,
char words[16][256], int wordc, int w, unsigned int op_flags)
{
enum opr_lenmod tmplmod;
- int tmpreg;
int ret, len;
+ long number;
int i;
if (w >= wordc)
if (ret != 1)
aerr("[] parse failure\n");
// only need the regmask
- parse_reg(&tmpreg, &tmplmod, regmask_indirect, opr->name);
+ parse_indmode(opr->name, regmask_indirect, 1);
return wordc;
}
else if (strchr(words[w], '[')) {
opr->type = OPT_REGMEM;
if (opr->lmod == OPLM_UNSPEC)
guess_lmod_from_name(opr);
- parse_reg(&tmpreg, &tmplmod, regmask_indirect,
- strchr(words[w], '['));
+ parse_indmode(strchr(words[w], '['), regmask_indirect, 0);
return wordc;
}
else if (('0' <= words[w][0] && words[w][0] <= '9')
|| words[w][0] == '-')
{
+ number = parse_number(words[w]);
opr->type = OPT_CONST;
- opr->val = (unsigned int)parse_number(words[w]);
+ opr->val = number;
+ printf_number(opr->name, sizeof(opr->name), number);
return wordc;
}
- ret = parse_reg(&opr->reg, &tmplmod, regmask, opr->name);
- if (ret == 0) {
- opr->type = OPT_REG;
- opr->lmod = tmplmod;
+ ret = parse_reg(&tmplmod, opr->name);
+ if (ret >= 0) {
+ setup_reg_opr(opr, ret, tmplmod, regmask);
return wordc;
}
{ "movzx",OP_MOVZX, 2, 2, OPF_DATA },
{ "movsx",OP_MOVSX, 2, 2, OPF_DATA },
{ "not", OP_NOT, 1, 1, OPF_DATA },
+ { "cdq", OP_CDQ, 0, 0, OPF_DATA },
{ "add", OP_ADD, 2, 2, OPF_DATA|OPF_FLAGS },
{ "sub", OP_SUB, 2, 2, OPF_DATA|OPF_FLAGS },
{ "and", OP_AND, 2, 2, OPF_DATA|OPF_FLAGS },
{ "shr", OP_SHR, 2, 2, OPF_DATA|OPF_FLAGS },
{ "sal", OP_SHL, 2, 2, OPF_DATA|OPF_FLAGS },
{ "sar", OP_SAR, 2, 2, OPF_DATA|OPF_FLAGS },
-// { "adc", OP_ADC, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC },
+ { "adc", OP_ADC, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC },
{ "sbb", OP_SBB, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC },
{ "inc", OP_INC, 1, 1, OPF_DATA|OPF_FLAGS },
{ "dec", OP_DEC, 1, 1, OPF_DATA|OPF_FLAGS },
-// { "mul", OP_MUL, 1, 1, OPF_DATA|OPF_FLAGS },
+ { "neg", OP_NEG, 1, 1, OPF_DATA|OPF_FLAGS },
+ { "mul", OP_MUL, 1, 1, OPF_DATA|OPF_FLAGS },
{ "imul", OP_IMUL, 1, 3, OPF_DATA|OPF_FLAGS },
+ { "div", OP_DIV, 1, 1, OPF_DATA|OPF_FLAGS },
+ { "idiv", OP_IDIV, 1, 1, OPF_DATA|OPF_FLAGS },
{ "test", OP_TEST, 2, 2, OPF_FLAGS },
{ "cmp", OP_CMP, 2, 2, OPF_FLAGS },
{ "retn", OP_RET, 0, 1, OPF_JMP },
{ "jng", OP_JLE, 1, 1, OPF_JMP|OPF_CC }, // 7e
{ "jg", OP_JG, 1, 1, OPF_JMP|OPF_CC }, // 7f ZF=0 && SF=OF
{ "jnle", OP_JG, 1, 1, OPF_JMP|OPF_CC }, // 7f
+ { "seto", OP_JO, 1, 1, OPF_DATA|OPF_CC },
+ { "setno", OP_JNO, 1, 1, OPF_DATA|OPF_CC },
+ { "setc", OP_JC, 1, 1, OPF_DATA|OPF_CC },
+ { "setb", OP_JC, 1, 1, OPF_DATA|OPF_CC },
+ { "setnc", OP_JNC, 1, 1, OPF_DATA|OPF_CC },
+ { "setae", OP_JNC, 1, 1, OPF_DATA|OPF_CC },
+ { "setz", OP_JZ, 1, 1, OPF_DATA|OPF_CC },
+ { "sete", OP_JZ, 1, 1, OPF_DATA|OPF_CC },
+ { "setnz", OP_JNZ, 1, 1, OPF_DATA|OPF_CC },
+ { "setne", OP_JNZ, 1, 1, OPF_DATA|OPF_CC },
+ { "setbe", OP_JBE, 1, 1, OPF_DATA|OPF_CC },
+ { "setna", OP_JBE, 1, 1, OPF_DATA|OPF_CC },
+ { "seta", OP_JA, 1, 1, OPF_DATA|OPF_CC },
+ { "setnbe", OP_JA, 1, 1, OPF_DATA|OPF_CC },
+ { "sets", OP_JS, 1, 1, OPF_DATA|OPF_CC },
+ { "setns", OP_JNS, 1, 1, OPF_DATA|OPF_CC },
+ { "setp", OP_JP, 1, 1, OPF_DATA|OPF_CC },
+ { "setpe", OP_JP, 1, 1, OPF_DATA|OPF_CC },
+ { "setnp", OP_JNP, 1, 1, OPF_DATA|OPF_CC },
+ { "setpo", OP_JNP, 1, 1, OPF_DATA|OPF_CC },
+ { "setl", OP_JL, 1, 1, OPF_DATA|OPF_CC },
+ { "setnge", OP_JL, 1, 1, OPF_DATA|OPF_CC },
+ { "setge", OP_JGE, 1, 1, OPF_DATA|OPF_CC },
+ { "setnl", OP_JGE, 1, 1, OPF_DATA|OPF_CC },
+ { "setle", OP_JLE, 1, 1, OPF_DATA|OPF_CC },
+ { "setng", OP_JLE, 1, 1, OPF_DATA|OPF_CC },
+ { "setg", OP_JG, 1, 1, OPF_DATA|OPF_CC },
+ { "setnle", OP_JG, 1, 1, OPF_DATA|OPF_CC },
};
static void parse_op(struct parsed_op *op, char words[16][256], int wordc)
words, wordc, w, op->flags);
}
- op->operand_cnt = opr;
-
if (w < wordc)
aerr("parse_op %s incomplete: %d/%d\n",
words[0], w, wordc);
+
+ // special cases
+ op->operand_cnt = opr;
+ if (!strncmp(op_table[i].name, "set", 3))
+ op->operand[0].lmod = OPLM_BYTE;
+
+ // ops with implicit argumets
+ switch (op->op) {
+ case OP_CDQ:
+ op->operand_cnt = 2;
+ setup_reg_opr(&op->operand[0], xDX, OPLM_DWORD, &op->regmask_dst);
+ setup_reg_opr(&op->operand[1], xAX, OPLM_DWORD, &op->regmask_src);
+ break;
+
+ case OP_IMUL:
+ if (op->operand_cnt != 1)
+ break;
+ // fallthrough
+ case OP_MUL:
+ // singleop mul
+ op->regmask_dst = (1 << xDX) | (1 << xAX);
+ op->regmask_src |= (1 << xAX);
+ if (op->operand[0].lmod == OPLM_UNSPEC)
+ op->operand[0].lmod = OPLM_DWORD;
+ break;
+
+ case OP_DIV:
+ case OP_IDIV:
+ // we could set up operands for edx:eax, but there is no real need to
+ // (see is_opr_modified())
+ regmask = (1 << xDX) | (1 << xAX);
+ op->regmask_dst = regmask;
+ op->regmask_src |= regmask;
+ if (op->operand[0].lmod == OPLM_UNSPEC)
+ op->operand[0].lmod = OPLM_DWORD;
+ break;
+
+ case OP_SHL:
+ case OP_SHR:
+ case OP_SAR:
+ if (op->operand[1].lmod == OPLM_UNSPEC)
+ op->operand[1].lmod = OPLM_BYTE;
+ break;
+
+ default:
+ break;
+ }
}
static const char *op_name(enum op_op op)
snprintf(buf, buf_size, "(u16)%s", opr_reg_p(po, popr));
break;
case OPLM_BYTE:
- snprintf(buf, buf_size, "(u8)%s", opr_reg_p(po, popr));
+ if (popr->name[1] == 'h') // XXX..
+ snprintf(buf, buf_size, "(u8)(%s >> 8)", opr_reg_p(po, popr));
+ else
+ snprintf(buf, buf_size, "(u8)%s", opr_reg_p(po, popr));
break;
default:
ferr(po, "invalid src lmod: %d\n", popr->lmod);
if (is_lea)
ferr(po, "lea from const?\n");
- snprintf(buf, buf_size, popr->val < 10 ? "%u" : "0x%02x", popr->val);
+ printf_number(buf, buf_size, popr->val);
break;
default:
break;
case OPLM_BYTE:
// ugh..
- snprintf(buf, buf_size, "LOBYTE(%s)", opr_reg_p(po, popr));
+ if (popr->name[1] == 'h') // XXX..
+ snprintf(buf, buf_size, "BYTE1(%s)", opr_reg_p(po, popr));
+ else
+ snprintf(buf, buf_size, "LOBYTE(%s)", opr_reg_p(po, popr));
break;
default:
ferr(po, "invalid dst lmod: %d\n", popr->lmod);
}
}
+static const char *lmod_cast(struct parsed_op *po,
+ enum opr_lenmod lmod, int is_signed)
+{
+ return is_signed ?
+ lmod_cast_s(po, lmod) :
+ lmod_cast_u(po, lmod);
+}
+
static enum parsed_flag_op split_cond(struct parsed_op *po,
enum op_op op, int *is_neg)
{
cast, expr, is_neg ? "!=" : "==");
break;
+ case PFO_S:
+ case PFO_L: // SF!=OF; OF=0
+ snprintf(buf, buf_size, "(%s%s %s 0)",
+ scast, expr, is_neg ? ">=" : "<");
+ break;
+
case PFO_LE: // ZF=1||SF!=OF; OF=0 after test
snprintf(buf, buf_size, "(%s%s %s 0)",
scast, expr, is_neg ? ">" : "<=");
scast = lmod_cast_s(po, lmod);
switch (pfo) {
+ case PFO_C:
+ // note: must be unsigned compare
+ snprintf(buf, buf_size, "(%s%s %s %s%s)",
+ cast, expr1, is_neg ? ">=" : "<", cast, expr2);
+ break;
+
case PFO_Z:
snprintf(buf, buf_size, "(%s%s %s %s%s)",
cast, expr1, is_neg ? "!=" : "==", cast, expr2);
break;
- case PFO_C:
+ case PFO_BE: // !a
// note: must be unsigned compare
snprintf(buf, buf_size, "(%s%s %s %s%s)",
- cast, expr1, is_neg ? ">=" : "<", cast, expr2);
+ cast, expr1, is_neg ? ">" : "<=", cast, expr2);
+ break;
+
+ // note: must be signed compare
+ case PFO_S:
+ snprintf(buf, buf_size, "(%s(%s - %s) %s 0)",
+ scast, expr1, expr2, is_neg ? ">=" : "<");
break;
- case PFO_L:
- // note: must be signed compare
+ case PFO_L: // !ge
snprintf(buf, buf_size, "(%s%s %s %s%s)",
scast, expr1, is_neg ? ">=" : "<", scast, expr2);
break;
+ case PFO_LE:
+ snprintf(buf, buf_size, "(%s%s %s %s%s)",
+ scast, expr1, is_neg ? ">" : "<=", scast, expr2);
+ break;
+
default:
ferr(po, "%s: unhandled parsed_flag_op: %d\n", __func__, pfo);
}
switch (po->op)
{
case OP_ADD:
+ case OP_ADC:
return "+";
case OP_SUB:
+ case OP_SBB:
return "-";
case OP_AND:
return "&";
return found ? 0 : -1;
}
-// is operand opr modified by parsed_op po?
-static int is_opr_modified(struct parsed_opr *opr,
+// is operand 'opr modified' by parsed_op 'po'?
+static int is_opr_modified(const struct parsed_opr *opr,
const struct parsed_op *po)
{
if ((po->flags & OPF_RMD) || !(po->flags & OPF_DATA))
return IS(po->operand[0].name, opr->name);
}
-// scan for provided opr modification in range given
-static int scan_for_mod(struct parsed_opr *opr, int i, int opcnt)
+// is any operand of parsed_op 'po_test' modified by parsed_op 'po'?
+static int is_any_opr_modified(const struct parsed_op *po_test,
+ const struct parsed_op *po)
+{
+ int i;
+
+ if ((po->flags & OPF_RMD) || !(po->flags & OPF_DATA))
+ return 0;
+
+ if (po_test->regmask_src & po->regmask_dst)
+ return 1;
+
+ for (i = 0; i < po_test->operand_cnt; i++)
+ if (IS(po_test->operand[i].name, po->operand[0].name))
+ return 1;
+
+ return 0;
+}
+
+// scan for po_test operand modification in range given
+static int scan_for_mod(struct parsed_op *po_test, int i, int opcnt)
{
for (; i < opcnt; i++) {
- if (is_opr_modified(opr, &ops[i]))
+ if (is_any_opr_modified(po_test, &ops[i]))
return i;
}
return -1;
}
-static int scan_for_flag_set(int i, int opcnt)
+static int scan_for_flag_set(int i)
{
for (; i >= 0; i--) {
if (ops[i].flags & OPF_FLAGS)
return -1;
}
+// scan back for cdq, if anything modifies edx, fail
+static int scan_for_cdq_edx(int i)
+{
+ for (; i >= 0; i--) {
+ if (ops[i].op == OP_CDQ)
+ return i;
+
+ if (ops[i].regmask_dst & (1 << xDX))
+ return -1;
+ if (g_labels[i][0] != 0)
+ return -1;
+ }
+
+ return -1;
+}
+
static void gen_func(FILE *fout, FILE *fhdr, const char *funcn, int opcnt)
{
struct parsed_op *po, *delayed_flag_op = NULL, *tmp_op;
int had_decl = 0;
int regmask_arg = 0;
int regmask = 0;
- int special_sbb = 0;
int no_output;
int dummy;
int arg;
if (po->flags & OPF_CC)
{
- ret = scan_for_flag_set(i - 1, opcnt);
+ ret = scan_for_flag_set(i - 1);
if (ret < 0)
ferr(po, "unable to trace flag setter\n");
tmp_op = &ops[ret]; // flag setter
- for (j = 0; j < tmp_op->operand_cnt; j++) {
- ret = scan_for_mod(&tmp_op->operand[j], tmp_op - ops + 1, i);
- if (ret >= 0) {
- ret = 1 << split_cond(po, po->op, &dummy);
- tmp_op->pfomask |= ret;
- cmp_result_vars |= ret;
- po->datap = tmp_op;
- }
+ ret = scan_for_mod(tmp_op, ret + 1, i);
+ if (ret >= 0) {
+ ret = 1 << split_cond(po, po->op, &dummy);
+ tmp_op->pfomask |= ret;
+ cmp_result_vars |= ret;
+ po->datap = tmp_op;
}
+
+ if (po->op == OP_ADC || po->op == OP_SBB)
+ cmp_result_vars |= 1 << PFO_C;
}
else if (po->op == OP_CALL)
{
ferr(po, "arg search interrupted by '%s'\n", g_labels[j + 1]);
pp->arg[arg].datap = &ops[j];
- ret = scan_for_mod(&ops[j].operand[0], j + 1, i);
+ ret = scan_for_mod(&ops[j], j + 1, i);
if (ret >= 0) {
// mark this push as one that needs operand saving
ops[j].datap = (void *)(long)(arg + 1);
if (po->operand_cnt != n_) \
ferr(po, "operand_cnt is %d/%d\n", po->operand_cnt, n_)
- // see is delayed flag stuff is still valid
- if (delayed_flag_op != NULL) {
- if (po->regmask_dst & delayed_flag_op->regmask_src)
- delayed_flag_op = NULL;
- else {
- for (j = 0; j < po->operand_cnt; j++) {
- if (is_opr_modified(&delayed_flag_op->operand[0], po))
- delayed_flag_op = NULL;
- }
- }
- }
-
- if (last_arith_dst != NULL) {
- if (is_opr_modified(last_arith_dst, po))
- last_arith_dst = NULL;
- }
-
// conditional/flag using op?
if (po->flags & OPF_CC)
{
int is_neg = 0;
pfo = split_cond(po, po->op, &is_neg);
- special_sbb = 0;
- if (po->op == OP_SBB && IS(opr_name(po, 0), opr_name(po, 1)))
- special_sbb = 1;
// we go through all this trouble to avoid using parsed_flag_op,
// which makes generated code much nicer
if (po->flags & OPF_JMP) {
fprintf(fout, " if %s\n", buf1);
}
- else if (special_sbb) {
- out_dst_opr(buf2, sizeof(buf2), po, &po->operand[0]);
- fprintf(fout, " %s = %s * -1;", buf2, buf1);
+ else if (po->op == OP_ADC || po->op == OP_SBB) {
+ fprintf(fout, " cond_%s = %s;\n", parsed_flag_op_names[pfo], buf1);
}
- else if (po->flags & OPF_JMP) { // setc
+ else if (po->flags & OPF_DATA) { // SETcc
out_dst_opr(buf2, sizeof(buf2), po, &po->operand[0]);
fprintf(fout, " %s = %s;", buf2, buf1);
}
fprintf(fout, " %s = ~%s;", buf1, buf1);
break;
+ case OP_CDQ:
+ assert_operand_cnt(2);
+ fprintf(fout, " %s = (s32)%s >> 31;",
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]),
+ out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], 0));
+ strcpy(g_comment, "cdq");
+ break;
+
// arithmetic w/flags
case OP_ADD:
case OP_SUB:
case OP_AND:
case OP_OR:
- case OP_XOR:
+ propagate_lmod(po, &po->operand[0], &po->operand[1]);
+ // fallthrough
case OP_SHL:
case OP_SHR:
dualop_arith:
assert_operand_cnt(2);
- propagate_lmod(po, &po->operand[0], &po->operand[1]);
fprintf(fout, " %s %s= %s;",
out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]),
op_to_c(po),
delayed_flag_op = NULL;
break;
- case OP_SAR:
+ case OP_XOR:
assert_operand_cnt(2);
propagate_lmod(po, &po->operand[0], &po->operand[1]);
- switch (po->operand[0].lmod) {
- case OPLM_BYTE:
- strcpy(buf3, "(s8)");
+ if (IS(opr_name(po, 0), opr_name(po, 1))) {
+ // special case for XOR
+ fprintf(fout, " %s = 0;",
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]));
+ last_arith_dst = &po->operand[0];
+ delayed_flag_op = NULL;
break;
- case OPLM_WORD:
- strcpy(buf3, "(s16)");
- break;
- case OPLM_DWORD:
- strcpy(buf3, "(s32)");
- break;
- default:
- ferr(po, "invalid dst lmod: %d\n", po->operand[0].lmod);
}
+ goto dualop_arith;
+
+ case OP_SAR:
+ assert_operand_cnt(2);
out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
- fprintf(fout, " %s = %s%s >> %s;", buf1, buf3, buf1,
- out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], 0));
+ fprintf(fout, " %s = %s%s >> %s;", buf1,
+ lmod_cast_s(po, po->operand[0].lmod), buf1,
+ out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], 0));
last_arith_dst = &po->operand[0];
delayed_flag_op = NULL;
break;
+ case OP_ADC:
case OP_SBB:
- if (!special_sbb)
- ferr(po, "TODO\n");
+ assert_operand_cnt(2);
+ propagate_lmod(po, &po->operand[0], &po->operand[1]);
+ fprintf(fout, " %s %s= %s + cond_c;",
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]),
+ op_to_c(po),
+ out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], 0));
+ last_arith_dst = &po->operand[0];
+ delayed_flag_op = NULL;
break;
case OP_INC:
case OP_DEC:
out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
strcpy(buf2, po->op == OP_INC ? "++" : "--");
- switch (po->operand[0].lmod) {
- case OPLM_BYTE:
- fprintf(fout, " LOBYTE(%s)%s;", buf1, buf2);
- break;
- case OPLM_WORD:
- fprintf(fout, " LOWORD(%s)%s;", buf1, buf2);
- break;
- case OPLM_DWORD:
- fprintf(fout, " %s%s;", buf1, buf2);
- break;
- default:
- ferr(po, "invalid dst lmod: %d\n", po->operand[0].lmod);
- }
+ fprintf(fout, " %s%s;", buf1, buf2);
+ last_arith_dst = &po->operand[0];
+ delayed_flag_op = NULL;
+ break;
+
+ case OP_NEG:
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
+ out_src_opr(buf2, sizeof(buf2), po, &po->operand[0], 0);
+ fprintf(fout, " %s = -%s%s;", buf1,
+ lmod_cast_s(po, po->operand[0].lmod), buf2);
last_arith_dst = &po->operand[0];
delayed_flag_op = NULL;
break;
delayed_flag_op = NULL;
break;
+ case OP_DIV:
+ case OP_IDIV:
+ assert_operand_cnt(1);
+ if (po->operand[0].lmod != OPLM_DWORD)
+ ferr(po, "unhandled lmod %d\n", po->operand[0].lmod);
+
+ // 32bit division is common, look for it
+ if (scan_for_cdq_edx(i - 1) >= 0) {
+ out_src_opr(buf1, sizeof(buf1), po, &po->operand[0], 0);
+ strcpy(buf2, lmod_cast(po, po->operand[0].lmod,
+ po->op == OP_IDIV));
+ fprintf(fout, " edx = %seax %% %s%s;\n", buf2, buf2, buf1);
+ fprintf(fout, " eax = %seax / %s%s;", buf2, buf2, buf1);
+ }
+ else
+ ferr(po, "TODO 64bit divident\n");
+ break;
+
case OP_TEST:
case OP_CMP:
propagate_lmod(po, &po->operand[0], &po->operand[1]);
// note: we reuse OP_Jcc for SETcc, only flags differ
case OP_JO ... OP_JG:
- if (po->flags & OPF_CC)
+ if (po->flags & OPF_JMP)
fprintf(fout, " goto %s;", po->operand[0].name);
- else
- ferr(po, "TODO SETcc\n");
+ // else SETcc - should already be handled
break;
case OP_JMP:
break;
case OP_CALL:
+ assert_operand_cnt(1);
+ if (po->operand[0].type != OPT_LABEL)
+ ferr(po, "unhandled call type\n");
+
pp = po->datap;
if (pp == NULL)
ferr(po, "NULL pp\n");
}
if (!no_output)
fprintf(fout, "\n");
+
+ // see is delayed flag stuff is still valid
+ if (delayed_flag_op != NULL && delayed_flag_op != po) {
+ if (is_any_opr_modified(delayed_flag_op, po))
+ delayed_flag_op = NULL;
+ }
+
+ if (last_arith_dst != NULL && last_arith_dst != &po->operand[0]) {
+ if (is_opr_modified(last_arith_dst, po))
+ last_arith_dst = NULL;
+ }
}
fprintf(fout, "}\n\n");
notaz.gp2x.de / ia32rtools.git / commitdiff