* @version $Id$
*
* Summary table for x86 floatingpoint compares:
+ * (remember effect of unordered on x86: ZF=1, PF=1, CF=1)
+ *
* pnc_Eq => !P && E
* pnc_Lt => !P && B
* pnc_Le => !P && BE
* pnc_Gt => A
* pnc_Ge => AE
- * pnc_Lg => P || NE
+ * pnc_Lg => NE
* pnc_Leg => NP (ordered)
* pnc_Uo => P
* pnc_Ue => E
* pnc_Ule => BE
* pnc_Ug => P || A
* pnc_Uge => P || AE
- * pnc_Ne => NE
+ * pnc_Ne => P || NE
*/
#include "config.h"
be_gas_emit_block_name(block);
}
-/*
- * positive conditions for signed compares
- */
-static const char *const cmp2condition_s[] = {
- NULL, /* always false */
- "e", /* == */
- "l", /* < */
- "le", /* <= */
- "g", /* > */
- "ge", /* >= */
- "ne", /* != */
- NULL /* always true */
-};
-
-/*
- * positive conditions for unsigned compares
- */
-static const char *const cmp2condition_u[] = {
- NULL, /* always false */
- "e", /* == */
- "b", /* < */
- "be", /* <= */
- "a", /* > */
- "ae", /* >= */
- "ne", /* != */
- NULL /* always true */
-};
-
/**
* Emit the suffix for a compare instruction.
*/
-static void ia32_emit_cmp_suffix(int pnc)
-{
- const char *str;
-
- if (pnc == ia32_pn_Cmp_parity) {
- be_emit_char('p');
- return;
- }
-
- if (pnc & ia32_pn_Cmp_float || pnc & ia32_pn_Cmp_unsigned) {
- str = cmp2condition_u[pnc & 7];
- } else {
- str = cmp2condition_s[pnc & 7];
+static void ia32_emit_condition_code(ia32_condition_code_t cc)
+{
+ switch (cc) {
+ case ia32_cc_overflow: be_emit_cstring("o"); return;
+ case ia32_cc_not_overflow: be_emit_cstring("no"); return;
+ case ia32_cc_float_below:
+ case ia32_cc_float_unordered_below:
+ case ia32_cc_below: be_emit_cstring("b"); return;
+ case ia32_cc_float_above_equal:
+ case ia32_cc_float_unordered_above_equal:
+ case ia32_cc_above_equal: be_emit_cstring("ae"); return;
+ case ia32_cc_float_equal:
+ case ia32_cc_equal: be_emit_cstring("e"); return;
+ case ia32_cc_float_not_equal:
+ case ia32_cc_not_equal: be_emit_cstring("ne"); return;
+ case ia32_cc_float_below_equal:
+ case ia32_cc_float_unordered_below_equal:
+ case ia32_cc_below_equal: be_emit_cstring("be"); return;
+ case ia32_cc_float_above:
+ case ia32_cc_float_unordered_above:
+ case ia32_cc_above: be_emit_cstring("a"); return;
+ case ia32_cc_sign: be_emit_cstring("s"); return;
+ case ia32_cc_not_sign: be_emit_cstring("ns"); return;
+ case ia32_cc_parity: be_emit_cstring("p"); return;
+ case ia32_cc_not_parity: be_emit_cstring("np"); return;
+ case ia32_cc_less: be_emit_cstring("l"); return;
+ case ia32_cc_greater_equal: be_emit_cstring("ge"); return;
+ case ia32_cc_less_equal: be_emit_cstring("le"); return;
+ case ia32_cc_greater: be_emit_cstring("g"); return;
+ case ia32_cc_float_parity_cases:
+ case ia32_cc_additional_float_cases:
+ break;
}
-
- be_emit_string(str);
+ panic("Invalid ia32 condition code");
}
typedef enum ia32_emit_mod_t {
int offs = get_ia32_am_offs_int(node);
ir_node *base = get_irn_n(node, n_ia32_base);
int has_base = !is_ia32_NoReg_GP(base);
- ir_node *index = get_irn_n(node, n_ia32_index);
- int has_index = !is_ia32_NoReg_GP(index);
+ ir_node *idx = get_irn_n(node, n_ia32_index);
+ int has_index = !is_ia32_NoReg_GP(idx);
/* just to be sure... */
assert(!is_ia32_use_frame(node) || get_ia32_frame_ent(node) != NULL);
+ if (get_ia32_am_tls_segment(node))
+ be_emit_cstring("%gs:");
+
/* emit offset */
if (ent != NULL) {
const ia32_attr_t *attr = get_ia32_attr_const(node);
end_of_mods:
switch (*fmt++) {
+ arch_register_t const *reg;
+ ir_node const *imm;
+
case '%':
be_emit_char('%');
break;
ia32_emit_am(node);
break;
- case 'R': {
- const arch_register_t *reg = va_arg(ap, const arch_register_t*);
+ case 'R':
+ reg = va_arg(ap, const arch_register_t*);
if (get_ia32_op_type(node) == ia32_AddrModeS) {
goto emit_AM;
} else {
- if (mod & EMIT_ALTERNATE_AM)
- be_emit_char('*');
- emit_register(reg, NULL);
+ goto emit_R;
}
- break;
- }
case 'S':
if (get_ia32_op_type(node) == ia32_AddrModeS) {
assert(get_ia32_op_type(node) == ia32_Normal);
goto emit_S;
}
- break;
default: goto unknown;
}
break;
}
- case 'D': {
- unsigned pos;
- const arch_register_t *reg;
-
+ case 'D':
if (*fmt < '0' || '9' <= *fmt)
goto unknown;
-
- pos = *fmt++ - '0';
- reg = get_out_reg(node, pos);
- emit_register(reg, mod & EMIT_RESPECT_LS ? get_ia32_ls_mode(node) : NULL);
- break;
- }
+ reg = get_out_reg(node, *fmt++ - '0');
+ goto emit_R;
case 'I':
+ imm = node;
+emit_I:
if (!(mod & EMIT_ALTERNATE_AM))
be_emit_char('$');
- emit_ia32_Immediate_no_prefix(node);
+ emit_ia32_Immediate_no_prefix(imm);
break;
case 'L':
ia32_emit_cfop_target(node);
break;
- case 'M': {
+ case 'M':
ia32_emit_mode_suffix_mode(get_ia32_ls_mode(node));
break;
- }
case 'P': {
- int pnc = va_arg(ap, int);
- ia32_emit_cmp_suffix(pnc);
+ ia32_condition_code_t cc = va_arg(ap, ia32_condition_code_t);
+ ia32_emit_condition_code(cc);
break;
}
- case 'R': {
- const arch_register_t *reg = va_arg(ap, const arch_register_t*);
+ case 'R':
+ reg = va_arg(ap, const arch_register_t*);
+emit_R:
+ if (mod & EMIT_ALTERNATE_AM)
+ be_emit_char('*');
if (mod & EMIT_HIGH_REG) {
emit_8bit_register_high(reg);
} else if (mod & EMIT_LOW_REG) {
emit_register(reg, mod & EMIT_RESPECT_LS ? get_ia32_ls_mode(node) : NULL);
}
break;
- }
emit_S:
case 'S': {
- unsigned pos;
- const ir_node *in;
+ unsigned pos;
if (*fmt < '0' || '9' <= *fmt)
goto unknown;
pos = *fmt++ - '0';
- in = get_irn_n(node, pos);
- if (is_ia32_Immediate(in)) {
- if (!(mod & EMIT_ALTERNATE_AM))
- be_emit_char('$');
- emit_ia32_Immediate_no_prefix(in);
+ imm = get_irn_n(node, pos);
+ if (is_ia32_Immediate(imm)) {
+ goto emit_I;
} else {
- const arch_register_t *reg;
-
- if (mod & EMIT_ALTERNATE_AM)
- be_emit_char('*');
reg = get_in_reg(node, pos);
- emit_register(reg, mod & EMIT_RESPECT_LS ? get_ia32_ls_mode(node) : NULL);
+ goto emit_R;
}
- break;
}
case 's': {
}
}
-static int determine_final_pnc(const ir_node *node, int flags_pos, int pnc)
+static int determine_final_cc(const ir_node *node, int flags_pos, int cc)
{
ir_node *flags = get_irn_n(node, flags_pos);
const ia32_attr_t *flags_attr;
}
flags_attr = get_ia32_attr_const(cmp);
- if (flags_attr->data.ins_permuted)
- pnc = get_mirrored_pnc(pnc);
- pnc |= ia32_pn_Cmp_float;
- } else if (is_ia32_Ucomi(flags) || is_ia32_Fucomi(flags)
- || is_ia32_Fucompi(flags)) {
- flags_attr = get_ia32_attr_const(flags);
-
- if (flags_attr->data.ins_permuted)
- pnc = get_mirrored_pnc(pnc);
- pnc |= ia32_pn_Cmp_float;
} else {
flags_attr = get_ia32_attr_const(flags);
-
- if (flags_attr->data.ins_permuted)
- pnc = get_mirrored_pnc(pnc);
- if (flags_attr->data.cmp_unsigned)
- pnc |= ia32_pn_Cmp_unsigned;
}
- return pnc;
-}
-
-static int ia32_get_negated_pnc(int pnc)
-{
- ir_mode *mode = pnc & ia32_pn_Cmp_float ? mode_F : mode_Iu;
- return get_negated_pnc(pnc, mode);
+ if (flags_attr->data.ins_permuted)
+ cc = ia32_invert_condition_code(cc);
+ return cc;
}
void ia32_emit_cmp_suffix_node(const ir_node *node, int flags_pos)
{
- int pnc = get_ia32_condcode(node);
- pnc = determine_final_pnc(node, flags_pos, pnc);
+ ia32_condition_code_t cc = get_ia32_condcode(node);
+ cc = determine_final_cc(node, flags_pos, cc);
- ia32_emit_cmp_suffix(pnc);
+ ia32_emit_condition_code(cc);
}
/**
*/
static void emit_ia32_Jcc(const ir_node *node)
{
- int need_parity_label = 0;
- const ir_node *proj_true;
- const ir_node *proj_false;
- int pnc = get_ia32_condcode(node);
+ int need_parity_label = 0;
+ ia32_condition_code_t cc = get_ia32_condcode(node);
+ const ir_node *proj_true;
+ const ir_node *proj_false;
- pnc = determine_final_pnc(node, 0, pnc);
+ cc = determine_final_cc(node, 0, cc);
/* get both Projs */
proj_true = get_proj(node, pn_ia32_Jcc_true);
proj_true = proj_false;
proj_false = t;
- pnc = ia32_get_negated_pnc(pnc);
+ cc = ia32_negate_condition_code(cc);
}
- if (pnc & ia32_pn_Cmp_float) {
+ if (cc & ia32_cc_float_parity_cases) {
/* Some floating point comparisons require a test of the parity flag,
* which indicates that the result is unordered */
- switch (pnc & 0x0f) {
- case pn_Cmp_Uo: {
+ if (cc & ia32_cc_negated) {
ia32_emitf(proj_true, "\tjp %L\n");
- break;
- }
-
- case pn_Cmp_Leg:
- ia32_emitf(proj_true, "\tjnp %L\n");
- break;
-
- case pn_Cmp_Eq:
- case pn_Cmp_Lt:
- case pn_Cmp_Le:
+ } else {
/* we need a local label if the false proj is a fallthrough
* as the falseblock might have no label emitted then */
if (can_be_fallthrough(proj_false)) {
} else {
ia32_emitf(proj_false, "\tjp %L\n");
}
- goto emit_jcc;
-
- case pn_Cmp_Ug:
- case pn_Cmp_Uge:
- case pn_Cmp_Ne:
- ia32_emitf(proj_true, "\tjp %L\n");
- goto emit_jcc;
-
- default:
- goto emit_jcc;
}
- } else {
-emit_jcc:
- ia32_emitf(proj_true, "\tj%P %L\n", pnc);
}
-
+ ia32_emitf(proj_true, "\tj%P %L\n", cc);
if (need_parity_label) {
ia32_emitf(NULL, "1:\n");
}
{
const arch_register_t *dreg = get_out_reg(node, pn_ia32_Setcc_res);
- int pnc = get_ia32_condcode(node);
- pnc = determine_final_pnc(node, n_ia32_Setcc_eflags, pnc);
- if (pnc & ia32_pn_Cmp_float) {
- switch (pnc & 0x0f) {
- case pn_Cmp_Uo:
- ia32_emitf(node, "\tsetp %#R\n", dreg);
- return;
-
- case pn_Cmp_Leg:
- ia32_emitf(node, "\tsetnp %#R\n", dreg);
- return;
-
- case pn_Cmp_Eq:
- case pn_Cmp_Lt:
- case pn_Cmp_Le:
- ia32_emitf(node, "\tset%P %<R\n", pnc, dreg);
- ia32_emitf(node, "\tsetnp %>R\n", dreg);
- ia32_emitf(node, "\tandb %>R, %<R\n", dreg, dreg);
- return;
-
- case pn_Cmp_Ug:
- case pn_Cmp_Uge:
- case pn_Cmp_Ne:
- ia32_emitf(node, "\tset%P %<R\n", pnc, dreg);
+ ia32_condition_code_t cc = get_ia32_condcode(node);
+ cc = determine_final_cc(node, n_ia32_Setcc_eflags, cc);
+ if (cc & ia32_cc_float_parity_cases) {
+ if (cc & ia32_cc_negated) {
+ ia32_emitf(node, "\tset%P %<R\n", cc, dreg);
ia32_emitf(node, "\tsetp %>R\n", dreg);
ia32_emitf(node, "\torb %>R, %<R\n", dreg, dreg);
- return;
-
- default:
- break;
+ } else {
+ ia32_emitf(node, "\tset%P %<R\n", cc, dreg);
+ ia32_emitf(node, "\tsetnp %>R\n", dreg);
+ ia32_emitf(node, "\tandb %>R, %<R\n", dreg, dreg);
}
+ } else {
+ ia32_emitf(node, "\tset%P %#R\n", cc, dreg);
}
- ia32_emitf(node, "\tset%P %#R\n", pnc, dreg);
}
static void emit_ia32_CMovcc(const ir_node *node)
{
const ia32_attr_t *attr = get_ia32_attr_const(node);
const arch_register_t *out = arch_irn_get_register(node, pn_ia32_res);
- int pnc = get_ia32_condcode(node);
+ ia32_condition_code_t cc = get_ia32_condcode(node);
const arch_register_t *in_true;
const arch_register_t *in_false;
- pnc = determine_final_pnc(node, n_ia32_CMovcc_eflags, pnc);
+ cc = determine_final_cc(node, n_ia32_CMovcc_eflags, cc);
/* although you can't set ins_permuted in the constructor it might still
* be set by memory operand folding
* Permuting inputs of a cmov means the condition is negated!
*/
if (attr->data.ins_permuted)
- pnc = ia32_get_negated_pnc(pnc);
+ cc = ia32_negate_condition_code(cc);
in_true = arch_get_irn_register(get_irn_n(node, n_ia32_CMovcc_val_true));
in_false = arch_get_irn_register(get_irn_n(node, n_ia32_CMovcc_val_false));
assert(get_ia32_op_type(node) == ia32_Normal);
- pnc = ia32_get_negated_pnc(pnc);
+ cc = ia32_negate_condition_code(cc);
tmp = in_true;
in_true = in_false;
ia32_emitf(node, "\tmovl %R, %R\n", in_false, out);
}
- /* TODO: handling of Nans isn't correct yet */
- if (pnc & ia32_pn_Cmp_float) {
- switch (pnc & 0x0f) {
- case pn_Cmp_Uo:
- case pn_Cmp_Leg:
- case pn_Cmp_Eq:
- case pn_Cmp_Lt:
- case pn_Cmp_Le:
- case pn_Cmp_Ug:
- case pn_Cmp_Uge:
- case pn_Cmp_Ne:
- panic("CMov with floatingpoint compare/parity not supported yet");
- }
- }
-
- ia32_emitf(node, "\tcmov%P %#AR, %#R\n", pnc, in_true, out);
-}
-
-
-/* jump table entry (target and corresponding number) */
-typedef struct branch_t {
- ir_node *target;
- int value;
-} branch_t;
-
-/* jump table for switch generation */
-typedef struct jmp_tbl_t {
- ir_node *defProj; /**< default target */
- long min_value; /**< smallest switch case */
- long max_value; /**< largest switch case */
- long num_branches; /**< number of jumps */
- char label[SNPRINTF_BUF_LEN]; /**< label of the jump table */
- branch_t *branches; /**< jump array */
-} jmp_tbl_t;
-
-/**
- * Compare two variables of type branch_t. Used to sort all switch cases
- */
-static int ia32_cmp_branch_t(const void *a, const void *b)
-{
- branch_t *b1 = (branch_t *)a;
- branch_t *b2 = (branch_t *)b;
-
- if (b1->value <= b2->value)
- return -1;
- else
- return 1;
-}
-
-static void generate_jump_table(jmp_tbl_t *tbl, const ir_node *node)
-{
- int i;
- long pnc;
- long default_pn;
- ir_node *proj;
- const ir_edge_t *edge;
-
- /* fill the table structure */
- get_unique_label(tbl->label, SNPRINTF_BUF_LEN, "TBL_");
- tbl->defProj = NULL;
- tbl->num_branches = get_irn_n_edges(node) - 1;
- tbl->branches = XMALLOCNZ(branch_t, tbl->num_branches);
- tbl->min_value = LONG_MAX;
- tbl->max_value = LONG_MIN;
-
- default_pn = get_ia32_condcode(node);
- i = 0;
- /* go over all proj's and collect them */
- foreach_out_edge(node, edge) {
- proj = get_edge_src_irn(edge);
- assert(is_Proj(proj) && "Only proj allowed at SwitchJmp");
-
- pnc = get_Proj_proj(proj);
-
- /* check for default proj */
- if (pnc == default_pn) {
- assert(tbl->defProj == NULL && "found two default Projs at SwitchJmp");
- tbl->defProj = proj;
- } else {
- tbl->min_value = pnc < tbl->min_value ? pnc : tbl->min_value;
- tbl->max_value = pnc > tbl->max_value ? pnc : tbl->max_value;
-
- /* create branch entry */
- tbl->branches[i].target = proj;
- tbl->branches[i].value = pnc;
- ++i;
- }
-
+ if (cc & ia32_cc_float_parity_cases) {
+ panic("CMov with floatingpoint compare/parity not supported yet");
}
- assert(i == tbl->num_branches);
- /* sort the branches by their number */
- qsort(tbl->branches, tbl->num_branches, sizeof(tbl->branches[0]), ia32_cmp_branch_t);
+ ia32_emitf(node, "\tcmov%P %#AR, %#R\n", cc, in_true, out);
}
/**
- * Emits code for a SwitchJmp (creates a jump table if
- * possible otherwise a cmp-jmp cascade). Port from
- * cggg ia32 backend
+ * Emits code for a SwitchJmp
*/
static void emit_ia32_SwitchJmp(const ir_node *node)
{
- unsigned long interval;
- int last_value, i;
- jmp_tbl_t tbl;
-
- /* fill the table structure */
- generate_jump_table(&tbl, node);
-
- /* two-complement's magic make this work without overflow */
- interval = tbl.max_value - tbl.min_value;
-
- /* emit the table */
- ia32_emitf(node, "\tcmpl $%u, %S0\n", interval);
- ia32_emitf(tbl.defProj, "\tja %L\n");
-
- if (tbl.num_branches > 1) {
- /* create table */
- ia32_emitf(node, "\tjmp *%s(,%S0,4)\n", tbl.label);
-
- be_gas_emit_switch_section(GAS_SECTION_RODATA);
- ia32_emitf(NULL, "\t.align 4\n");
- ia32_emitf(NULL, "%s:\n", tbl.label);
+ ir_entity *jump_table = get_ia32_am_sc(node);
+ long default_pn = get_ia32_default_pn(node);
- last_value = tbl.branches[0].value;
- for (i = 0; i != tbl.num_branches; ++i) {
- while (last_value != tbl.branches[i].value) {
- ia32_emitf(tbl.defProj, ".long %L\n");
- ++last_value;
- }
- ia32_emitf(tbl.branches[i].target, ".long %L\n");
- ++last_value;
- }
- be_gas_emit_switch_section(GAS_SECTION_TEXT);
- } else {
- /* one jump is enough */
- ia32_emitf(tbl.branches[0].target, "\tjmp %L\n");
- }
+ ia32_emitf(node, "\tjmp *%AM\n", node);
- free(tbl.branches);
+ emit_jump_table(node, default_pn, jump_table, get_cfop_target_block);
}
/**
*/
static void emit_ia32_Jmp(const ir_node *node)
{
- ir_node *block;
-
- /* for now, the code works for scheduled and non-schedules blocks */
- block = get_nodes_block(node);
-
/* we have a block schedule */
if (can_be_fallthrough(node)) {
ia32_emitf(node, "\t/* fallthrough to %L */\n");
const ia32_asm_reg_t *asm_reg;
char c;
char modifier = 0;
- int num = -1;
+ int num;
int p;
assert(*s == '%');
}
/* parse number */
- sscanf(s, "%d%n", &num, &p);
- if (num < 0) {
+ if (sscanf(s, "%d%n", &num, &p) != 1) {
ir_fprintf(stderr, "Warning: Couldn't parse assembler operand (%+F)\n",
node);
return s;
*/
static void emit_ia32_Conv_I2I(const ir_node *node)
{
- ir_mode *smaller_mode = get_ia32_ls_mode(node);
- int signed_mode = mode_is_signed(smaller_mode);
+ ir_mode *smaller_mode = get_ia32_ls_mode(node);
+ int signed_mode = mode_is_signed(smaller_mode);
const char *sign_suffix;
assert(!mode_is_float(smaller_mode));
ia32_emitf(node, "\tmovl %I, %D0\n");
}
-/**
- * Emits code to load the TLS base
- */
-static void emit_ia32_LdTls(const ir_node *node)
-{
- ia32_emitf(node, "\tmovl %%gs:0, %D0\n");
-}
-
/* helper function for emit_ia32_Minus64Bit */
static void emit_mov(const ir_node* node, const arch_register_t *src, const arch_register_t *dst)
{
IA32_EMIT(IMul);
IA32_EMIT(Jcc);
IA32_EMIT(Setcc);
- IA32_EMIT(LdTls);
IA32_EMIT(Minus64Bit);
IA32_EMIT(SwitchJmp);
IA32_EMIT(ClimbFrame);
BE_EMIT(Perm);
BE_EMIT(Return);
- BE_IGN(Barrier);
BE_IGN(Keep);
BE_IGN(Start);
*/
static void ia32_emit_block_header(ir_node *block)
{
- ir_graph *irg = current_ir_graph;
+ ir_graph *irg = current_ir_graph;
int need_label = block_needs_label(block);
- int i, arity;
- ir_exec_freq *exec_freq = be_get_irg_exec_freq(irg);
+ ir_exec_freq *exec_freq = be_get_irg_exec_freq(irg);
+ int arity;
if (block == get_irg_end_block(irg))
return;
if (arity <= 0) {
be_emit_cstring(" none");
} else {
+ int i;
for (i = 0; i < arity; ++i) {
ir_node *predblock = get_Block_cfgpred_block(block, i);
be_emit_irprintf(" %d", get_irn_node_nr(predblock));
Those are ascending with ascending addresses. */
qsort(exc_list, ARR_LEN(exc_list), sizeof(exc_list[0]), cmp_exc_entry);
{
- size_t i;
+ size_t e;
- for (i = 0; i < ARR_LEN(exc_list); ++i) {
+ for (e = 0; e < ARR_LEN(exc_list); ++e) {
be_emit_cstring("\t.long ");
- ia32_emit_exc_label(exc_list[i].exc_instr);
+ ia32_emit_exc_label(exc_list[e].exc_instr);
be_emit_char('\n');
be_emit_cstring("\t.long ");
- be_gas_emit_block_name(exc_list[i].block);
+ be_gas_emit_block_name(exc_list[e].block);
be_emit_char('\n');
}
}
static unsigned char reg_gp_map[N_ia32_gp_REGS];
//static unsigned char reg_mmx_map[N_ia32_mmx_REGS];
//static unsigned char reg_sse_map[N_ia32_xmm_REGS];
-static unsigned char pnc_map_signed[8];
-static unsigned char pnc_map_unsigned[8];
static void build_reg_map(void)
{
reg_gp_map[REG_GP_EBP] = 0x5;
reg_gp_map[REG_GP_ESI] = 0x6;
reg_gp_map[REG_GP_EDI] = 0x7;
-
- pnc_map_signed[pn_Cmp_Eq] = 0x04;
- pnc_map_signed[pn_Cmp_Lt] = 0x0C;
- pnc_map_signed[pn_Cmp_Le] = 0x0E;
- pnc_map_signed[pn_Cmp_Gt] = 0x0F;
- pnc_map_signed[pn_Cmp_Ge] = 0x0D;
- pnc_map_signed[pn_Cmp_Lg] = 0x05;
-
- pnc_map_unsigned[pn_Cmp_Eq] = 0x04;
- pnc_map_unsigned[pn_Cmp_Lt] = 0x02;
- pnc_map_unsigned[pn_Cmp_Le] = 0x06;
- pnc_map_unsigned[pn_Cmp_Gt] = 0x07;
- pnc_map_unsigned[pn_Cmp_Ge] = 0x03;
- pnc_map_unsigned[pn_Cmp_Lg] = 0x05;
}
/** Returns the encoding for a pnc field. */
-static unsigned char pnc2cc(int pnc)
+static unsigned char pnc2cc(ia32_condition_code_t cc)
{
- unsigned char cc;
- if (pnc == ia32_pn_Cmp_parity) {
- cc = 0x0A;
- } else if (pnc & ia32_pn_Cmp_float || pnc & ia32_pn_Cmp_unsigned) {
- cc = pnc_map_unsigned[pnc & 0x07];
- } else {
- cc = pnc_map_signed[pnc & 0x07];
- }
- assert(cc != 0);
- return cc;
+ return cc & 0xf;
}
/** Sign extension bit values for binops */
int offs = get_ia32_am_offs_int(node);
ir_node *base = get_irn_n(node, n_ia32_base);
int has_base = !is_ia32_NoReg_GP(base);
- ir_node *index = get_irn_n(node, n_ia32_index);
- int has_index = !is_ia32_NoReg_GP(index);
+ ir_node *idx = get_irn_n(node, n_ia32_index);
+ int has_index = !is_ia32_NoReg_GP(idx);
unsigned modrm = 0;
unsigned sib = 0;
unsigned emitoffs = 0;
/* Determine if we need a SIB byte. */
if (has_index) {
- const arch_register_t *reg_index = arch_get_irn_register(index);
+ const arch_register_t *reg_index = arch_get_irn_register(idx);
int scale = get_ia32_am_scale(node);
assert(scale < 4);
/* R/M set to ESP means SIB in 32bit mode. */
{
const arch_register_t *dreg = get_out_reg(node, pn_ia32_Setcc_res);
- int pnc = get_ia32_condcode(node);
- pnc = determine_final_pnc(node, n_ia32_Setcc_eflags, pnc);
- if (pnc & ia32_pn_Cmp_float) {
- switch (pnc & 0x0f) {
- case pn_Cmp_Uo:
- /* setp <dreg */
+ ia32_condition_code_t cc = get_ia32_condcode(node);
+ cc = determine_final_cc(node, n_ia32_Setcc_eflags, cc);
+ if (cc & ia32_cc_float_parity_cases) {
+ if (cc & ia32_cc_negated) {
+ /* set%PNC <dreg */
bemit8(0x0F);
- bemit8(0x9A);
+ bemit8(0x90 | pnc2cc(cc));
bemit_modrm8(REG_LOW, dreg);
- return;
- case pn_Cmp_Leg:
- /* setnp <dreg*/
+ /* setp >dreg */
bemit8(0x0F);
- bemit8(0x9B);
- bemit_modrm8(REG_LOW, dreg);
- return;
+ bemit8(0x9A);
+ bemit_modrm8(REG_HIGH, dreg);
- case pn_Cmp_Eq:
- case pn_Cmp_Lt:
- case pn_Cmp_Le:
+ /* orb %>dreg, %<dreg */
+ bemit8(0x08);
+ bemit_modrr8(REG_LOW, dreg, REG_HIGH, dreg);
+ } else {
/* set%PNC <dreg */
bemit8(0x0F);
- bemit8(0x90 | pnc2cc(pnc));
+ bemit8(0x90 | pnc2cc(cc));
bemit_modrm8(REG_LOW, dreg);
/* setnp >dreg */
/* andb %>dreg, %<dreg */
bemit8(0x20);
bemit_modrr8(REG_LOW, dreg, REG_HIGH, dreg);
- return;
-
- case pn_Cmp_Ug:
- case pn_Cmp_Uge:
- case pn_Cmp_Ne:
- /* set%PNC <dreg */
- bemit8(0x0F);
- bemit8(0x90 | pnc2cc(pnc));
- bemit_modrm8(REG_LOW, dreg);
-
- /* setp >dreg */
- bemit8(0x0F);
- bemit8(0x9A);
- bemit_modrm8(REG_HIGH, dreg);
-
- /* orb %>dreg, %<dreg */
- bemit8(0x08);
- bemit_modrr8(REG_LOW, dreg, REG_HIGH, dreg);
- return;
-
- default:
- break;
}
+ } else {
+ /* set%PNC <dreg */
+ bemit8(0x0F);
+ bemit8(0x90 | pnc2cc(cc));
+ bemit_modrm8(REG_LOW, dreg);
}
- /* set%PNC <dreg */
- bemit8(0x0F);
- bemit8(0x90 | pnc2cc(pnc));
- bemit_modrm8(REG_LOW, dreg);
}
static void bemit_cmovcc(const ir_node *node)
const ia32_attr_t *attr = get_ia32_attr_const(node);
int ins_permuted = attr->data.ins_permuted;
const arch_register_t *out = arch_irn_get_register(node, pn_ia32_res);
- int pnc = get_ia32_condcode(node);
+ ia32_condition_code_t cc = get_ia32_condcode(node);
const arch_register_t *in_true;
const arch_register_t *in_false;
- pnc = determine_final_pnc(node, n_ia32_CMovcc_eflags, pnc);
+ cc = determine_final_cc(node, n_ia32_CMovcc_eflags, cc);
in_true = arch_get_irn_register(get_irn_n(node, n_ia32_CMovcc_val_true));
in_false = arch_get_irn_register(get_irn_n(node, n_ia32_CMovcc_val_false));
}
if (ins_permuted)
- pnc = ia32_get_negated_pnc(pnc);
+ cc = ia32_negate_condition_code(cc);
- /* TODO: handling of Nans isn't correct yet */
+ if (cc & ia32_cc_float_parity_cases)
+ panic("cmov can't handle parity float cases");
bemit8(0x0F);
- bemit8(0x40 | pnc2cc(pnc));
+ bemit8(0x40 | pnc2cc(cc));
if (get_ia32_op_type(node) == ia32_Normal) {
bemit_modrr(in_true, out);
} else {
if (out->index == REG_GP_EAX) {
ir_node *base = get_irn_n(node, n_ia32_base);
int has_base = !is_ia32_NoReg_GP(base);
- ir_node *index = get_irn_n(node, n_ia32_index);
- int has_index = !is_ia32_NoReg_GP(index);
+ ir_node *idx = get_irn_n(node, n_ia32_index);
+ int has_index = !is_ia32_NoReg_GP(idx);
if (!has_base && !has_index) {
ir_entity *ent = get_ia32_am_sc(node);
int offs = get_ia32_am_offs_int(node);
if (in->index == REG_GP_EAX) {
ir_node *base = get_irn_n(node, n_ia32_base);
int has_base = !is_ia32_NoReg_GP(base);
- ir_node *index = get_irn_n(node, n_ia32_index);
- int has_index = !is_ia32_NoReg_GP(index);
+ ir_node *idx = get_irn_n(node, n_ia32_index);
+ int has_index = !is_ia32_NoReg_GP(idx);
if (!has_base && !has_index) {
ir_entity *ent = get_ia32_am_sc(node);
int offs = get_ia32_am_offs_int(node);
static void bemit_ia32_jcc(const ir_node *node)
{
- int pnc = get_ia32_condcode(node);
- const ir_node *proj_true;
- const ir_node *proj_false;
- const ir_node *dest_true;
- const ir_node *dest_false;
- const ir_node *block;
+ ia32_condition_code_t cc = get_ia32_condcode(node);
+ const ir_node *proj_true;
+ const ir_node *proj_false;
+ const ir_node *dest_true;
+ const ir_node *dest_false;
- pnc = determine_final_pnc(node, 0, pnc);
+ cc = determine_final_cc(node, 0, cc);
/* get both Projs */
proj_true = get_proj(node, pn_ia32_Jcc_true);
proj_false = get_proj(node, pn_ia32_Jcc_false);
assert(proj_false && "Jcc without false Proj");
- block = get_nodes_block(node);
-
if (can_be_fallthrough(proj_true)) {
/* exchange both proj's so the second one can be omitted */
const ir_node *t = proj_true;
proj_true = proj_false;
proj_false = t;
- pnc = ia32_get_negated_pnc(pnc);
+ cc = ia32_negate_condition_code(cc);
}
dest_true = get_cfop_target_block(proj_true);
dest_false = get_cfop_target_block(proj_false);
- if (pnc & ia32_pn_Cmp_float) {
+ if (cc & ia32_cc_float_parity_cases) {
/* Some floating point comparisons require a test of the parity flag,
* which indicates that the result is unordered */
- switch (pnc & 15) {
- case pn_Cmp_Uo: {
- bemit_jp(false, dest_true);
- break;
+ if (cc & ia32_cc_negated) {
+ bemit_jp(false, dest_true);
+ } else {
+ /* we need a local label if the false proj is a fallthrough
+ * as the falseblock might have no label emitted then */
+ if (can_be_fallthrough(proj_false)) {
+ bemit8(0x7A);
+ bemit8(0x06); // jp + 6
+ } else {
+ bemit_jp(false, dest_false);
}
-
- case pn_Cmp_Leg:
- bemit_jp(true, dest_true);
- break;
-
- case pn_Cmp_Eq:
- case pn_Cmp_Lt:
- case pn_Cmp_Le:
- /* we need a local label if the false proj is a fallthrough
- * as the falseblock might have no label emitted then */
- if (can_be_fallthrough(proj_false)) {
- bemit8(0x7A);
- bemit8(0x06); // jp + 6
- } else {
- bemit_jp(false, dest_false);
- }
- goto emit_jcc;
-
- case pn_Cmp_Ug:
- case pn_Cmp_Uge:
- case pn_Cmp_Ne:
- bemit_jp(false, dest_true);
- goto emit_jcc;
-
- default:
- goto emit_jcc;
}
- } else {
-emit_jcc:
- bemit_jcc(pnc, dest_true);
}
+ bemit_jcc(cc, dest_true);
/* the second Proj might be a fallthrough */
if (can_be_fallthrough(proj_false)) {
static void bemit_switchjmp(const ir_node *node)
{
- unsigned long interval;
- int last_value;
- int i;
- jmp_tbl_t tbl;
- const arch_register_t *in;
+ ir_entity *jump_table = get_ia32_am_sc(node);
+ long default_pn = get_ia32_default_pn(node);
- /* fill the table structure */
- generate_jump_table(&tbl, node);
-
- /* two-complement's magic make this work without overflow */
- interval = tbl.max_value - tbl.min_value;
-
- in = get_in_reg(node, 0);
- /* emit the table */
- if (get_signed_imm_size(interval) == 1) {
- bemit8(0x83); // cmpl $imm8, %in
- bemit_modru(in, 7);
- bemit8(interval);
- } else {
- bemit8(0x81); // cmpl $imm32, %in
- bemit_modru(in, 7);
- bemit32(interval);
- }
- bemit8(0x0F); // ja tbl.defProj
- bemit8(0x87);
- ia32_emitf(tbl.defProj, ".long %L - . - 4\n");
-
- if (tbl.num_branches > 1) {
- /* create table */
- bemit8(0xFF); // jmp *tbl.label(,%in,4)
- bemit8(MOD_IND | ENC_REG(4) | ENC_RM(0x04));
- bemit8(ENC_SIB(2, reg_gp_map[in->index], 0x05));
- be_emit_irprintf("\t.long %s\n", tbl.label);
-
- be_gas_emit_switch_section(GAS_SECTION_RODATA);
- be_emit_cstring(".align 4\n");
- be_emit_irprintf("%s:\n", tbl.label);
-
- last_value = tbl.branches[0].value;
- for (i = 0; i != tbl.num_branches; ++i) {
- while (last_value != tbl.branches[i].value) {
- ia32_emitf(tbl.defProj, ".long %L\n");
- ++last_value;
- }
- ia32_emitf(tbl.branches[i].target, ".long %L\n");
- ++last_value;
- }
- be_gas_emit_switch_section(GAS_SECTION_TEXT);
- } else {
- /* one jump is enough */
- panic("switch only has one case");
- //ia32_emitf(tbl.branches[0].target, "\tjmp %L\n");
- }
-
- be_emit_write_line();
+ bemit8(0xFF); // jmp *tbl.label(,%in,4)
+ bemit_mod_am(0x05, node);
- free(tbl.branches);
+ emit_jump_table(node, default_pn, jump_table, get_cfop_target_block);
}
/**
/* ignore the following nodes */
register_emitter(op_ia32_ProduceVal, emit_Nothing);
- register_emitter(op_be_Barrier, emit_Nothing);
register_emitter(op_be_Keep, emit_Nothing);
register_emitter(op_be_Start, emit_Nothing);
register_emitter(op_Phi, emit_Nothing);
projects / libfirm / blobdiff