/**
* @file irarch.c
* @date 28.9.2004
- * @author Sebastian Hack
- * @brief Machine dependent firm optimizations.
+ * @author Sebastian Hack, Michael Beck
+ * @brief Machine dependent Firm optimizations.
*
* $Id$
*/
-#include <stdlib.h>
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#ifdef HAVE_STDLIB_H
+# include <stdlib.h>
+#endif
+
#include <assert.h>
#include "irnode_t.h"
#include "ircons_t.h"
#include "irgmod.h"
#include "irvrfy.h"
-#include "tv.h"
+#include "tv_t.h"
#include "dbginfo_t.h"
#include "iropt_dbg.h"
#include "irflag_t.h"
-#include "firmstat.h"
+#include "irhooks.h"
#include "ircons.h"
#include "irarch.h"
-#include "firmstat.h"
+#include "irreflect.h"
#undef DEB
ir_node *in[2];
ir_node *res;
- if (! op_Mulh) {
- op_Mulh = new_ir_op(get_next_ir_opcode(), "Mulh", op_pin_state_floats, irop_flag_commutative, oparity_binary, 0, 0);
- }
-
in[0] = op1;
in[1] = op2;
res = new_ir_node(db, irg, block, op_Mulh, mode, 2, in);
if (factory != NULL)
params = factory();
- if (params && (opts & (arch_dep_div_by_const|arch_dep_mod_by_const))) {
- if (! op_Mulh) {
- /* create the Mulh operation */
- op_Mulh = new_ir_op(get_next_ir_opcode(), "Mulh", op_pin_state_floats, irop_flag_commutative, oparity_binary, 0, 0);
- }
+ if (! op_Mulh) {
+ rflct_sig_t *sig;
+ int mulh_opc = get_next_ir_opcode();
+
+ /* create the Mulh operation */
+ op_Mulh = new_ir_op(mulh_opc, "Mulh", op_pin_state_floats, irop_flag_commutative, oparity_binary, 0, 0, NULL);
+ sig = rflct_signature_allocate(1, 3);
+ rflct_signature_set_arg(sig, 0, 0, "Res", RFLCT_MC(Int), 0, 0);
+ rflct_signature_set_arg(sig, 1, 0, "Block", RFLCT_MC(BB), 0, 0);
+ rflct_signature_set_arg(sig, 1, 1, "Op 0", RFLCT_MC(Int), 0, 0);
+ rflct_signature_set_arg(sig, 1, 2, "Op 1", RFLCT_MC(Int), 0, 0);
+
+ rflct_new_opcode(mulh_opc, "Mulh", 0);
+ rflct_opcode_add_signature(mulh_opc, sig);
}
}
opts = the_opts;
}
+/** check, whether a mode allows a Mulh instruction. */
+static int allow_Mulh(ir_mode *mode)
+{
+ if (get_mode_size_bits(mode) > params->max_bits_for_mulh)
+ return 0;
+ return (mode_is_signed(mode) && params->allow_mulhs) || (!mode_is_signed(mode) && params->allow_mulhu);
+}
+
+/* Replace Muls with Shifts and Add/Subs. */
ir_node *arch_dep_replace_mul_with_shifts(ir_node *irn)
{
ir_node *res = irn;
/* If the architecture dependent optimizations were not initialized
or this optimization was not enabled. */
- if(params == NULL || (opts & arch_dep_mul_to_shift) == 0)
+ if (params == NULL || (opts & arch_dep_mul_to_shift) == 0)
return irn;
- if(get_irn_opcode(irn) == iro_Mul && mode_is_int(mode)) {
- ir_node *block = get_nodes_block(irn);
+ if (get_irn_op(irn) == op_Mul && mode_is_int(mode)) {
+ ir_node *block = get_irn_n(irn, -1);
ir_node *left = get_binop_left(irn);
ir_node *right = get_binop_right(irn);
tarval *tv = NULL;
ir_node *operand = NULL;
/* Look, if one operand is a constant. */
- if(get_irn_opcode(left) == iro_Const) {
+ if (get_irn_opcode(left) == iro_Const) {
tv = get_Const_tarval(left);
operand = right;
} else if(get_irn_opcode(right) == iro_Const) {
operand = left;
}
- if(tv != NULL) {
+ if (tv != NULL) {
int maximum_shifts = params->maximum_shifts;
int also_use_subs = params->also_use_subs;
int highest_shift_amount = params->highest_shift_amount;
}
#endif
- // Go over all recorded one groups.
+ /* Go over all recorded one groups. */
curr_bit = compr[0];
for(i = 1; i < compr_len; i = end_of_group + 2) {
ones_in_group = compr[i];
zeros_in_group = 0;
- // Scan for singular 0s in a sequence
+ /* Scan for singular 0s in a sequence. */
for(j = i + 1; j < compr_len && compr[j] == 1; j += 2) {
zeros_in_group += 1;
ones_in_group += (j + 1 < compr_len ? compr[j + 1] : 0);
fprintf(stderr, " j:%d, ones:%d\n", j, curr_ones);
#endif
- // If this ones group is a singleton group (it has no
- // singleton zeros inside
+ /* If this ones group is a singleton group (it has no
+ singleton zeros inside. */
if(singleton)
shift_with_sub[shift_with_sub_pos++] = biased_curr_bit;
else if(j == i)
int amount = abs(curr_shift) - 1;
ir_node *aux = operand;
-
assert(amount >= 0 && "What is a negative shift??");
- if(amount != 0) {
- tarval *shift_amount = new_tarval_from_long(amount, mode_Iu);
- ir_node *cnst = new_r_Const(current_ir_graph, block, mode_Iu, shift_amount);
+ if (amount != 0) {
+ ir_node *cnst = new_r_Const_long(current_ir_graph, block, mode_Iu, amount);
aux = new_r_Shl(current_ir_graph, block, operand, cnst, mode);
}
- if(curr) {
- if(sub)
+ if (curr) {
+ if (sub)
curr = new_r_Sub(current_ir_graph, block, curr, aux, mode);
else
curr = new_r_Add(current_ir_graph, block, curr, aux, mode);
#ifdef DEB
{
const char *prefix = "";
- for(i = 0; i < n; i++) {
+ for (i = 0; i < n; ++i) {
fprintf(stderr, "%s%d", prefix, shifts[i]);
prefix = ", ";
}
}
if (res != irn)
- stat_arch_dep_replace_mul_with_shifts(irn);
+ hook_arch_dep_replace_mul_with_shifts(irn);
return res;
}
#define ONE(m) get_mode_one(m)
#define ZERO(m) get_mode_null(m)
+/** The result of a the magic() function. */
struct ms {
tarval *M; /**< magic number */
int s; /**< shift amount */
int bits = get_mode_size_bits(u_mode);
int p;
tarval *ad, *anc, *delta, *q1, *r1, *q2, *r2, *t; /* unsigned */
- pnc_number d_cmp, M_cmp;
+ pn_Cmp d_cmp, M_cmp;
tarval *bits_minus_1, *two_bits_1;
q1 = ADD(q1, q1); /* Update q1 = 2^p/|nc| */
r1 = ADD(r1, r1); /* Update r1 = rem(2^p, |nc|) */
- if (CMP(r1, anc) & Ge) {
+ if (CMP(r1, anc) & pn_Cmp_Ge) {
q1 = ADD(q1, ONE(u_mode));
r1 = SUB(r1, anc);
}
q2 = ADD(q2, q2); /* Update q2 = 2^p/|d| */
r2 = ADD(r2, r2); /* Update r2 = rem(2^p, |d|) */
- if (CMP(r2, ad) & Ge) {
+ if (CMP(r2, ad) & pn_Cmp_Ge) {
q2 = ADD(q2, ONE(u_mode));
r2 = SUB(r2, ad);
}
delta = SUB(ad, r2);
- } while (CMP(q1, delta) & Lt || (CMP(q1, delta) & Eq && CMP(r1, ZERO(u_mode)) & Eq));
+ } while (CMP(q1, delta) & pn_Cmp_Lt || (CMP(q1, delta) & pn_Cmp_Eq && CMP(r1, ZERO(u_mode)) & pn_Cmp_Eq));
d_cmp = CMP(d, ZERO(mode));
- if (d_cmp & Ge)
+ if (d_cmp & pn_Cmp_Ge)
mag.M = ADD(CNV(q2, mode), ONE(mode));
else
mag.M = SUB(ZERO(mode), ADD(CNV(q2, mode), ONE(mode)));
mag.s = p - bits;
/* need an add if d > 0 && M < 0 */
- mag.need_add = d_cmp & Gt && M_cmp & Lt;
+ mag.need_add = d_cmp & pn_Cmp_Gt && M_cmp & pn_Cmp_Lt;
/* need a sub if d < 0 && M > 0 */
- mag.need_sub = d_cmp & Lt && M_cmp & Gt;
+ mag.need_sub = d_cmp & pn_Cmp_Lt && M_cmp & pn_Cmp_Gt;
tarval_set_integer_overflow_mode(rem);
return mag;
}
+/** The result of the magicu() function. */
struct mu {
tarval *M; /**< magic add constant */
int s; /**< shift amount */
do {
++p;
- if (CMP(r1, SUB(nc, r1)) & Ge) {
+ if (CMP(r1, SUB(nc, r1)) & pn_Cmp_Ge) {
q1 = ADD(ADD(q1, q1), ONE(mode));
r1 = SUB(ADD(r1, r1), nc);
}
r1 = ADD(r1, r1);
}
- if (CMP(ADD(r2, ONE(mode)), SUB(d, r2)) & Ge) {
- if (CMP(q2, seven_ff) & Ge)
+ if (CMP(ADD(r2, ONE(mode)), SUB(d, r2)) & pn_Cmp_Ge) {
+ if (CMP(q2, seven_ff) & pn_Cmp_Ge)
magu.need_add = 1;
q2 = ADD(ADD(q2, q2), ONE(mode));
r2 = SUB(ADD(ADD(r2, r2), ONE(mode)), d);
}
else {
- if (CMP(q2, two_bits_1) & Ge)
+ if (CMP(q2, two_bits_1) & pn_Cmp_Ge)
magu.need_add = 1;
q2 = ADD(q2, q2);
}
delta = SUB(SUB(d, ONE(mode)), r2);
} while (p < 2*bits &&
- (CMP(q1, delta) & Lt || (CMP(q1, delta) & Eq && CMP(r1, ZERO(mode)) & Eq)));
+ (CMP(q1, delta) & pn_Cmp_Lt || (CMP(q1, delta) & pn_Cmp_Eq && CMP(r1, ZERO(mode)) & pn_Cmp_Eq)));
magu.M = ADD(q2, ONE(mode)); /* Magic number */
magu.s = p - bits; /* and shift amount */
}
/**
- * build the Mulh replacement code for n / tv
+ * Build the Mulh replacement code for n / tv.
*
- * Note thet 'div' might be a mod or DivMod operation as well
+ * Note that 'div' might be a mod or DivMod operation as well
*/
static ir_node *replace_div_by_mulh(ir_node *div, tarval *tv)
{
dbg_info *dbg = get_irn_dbg_info(div);
ir_node *n = get_binop_left(div);
- ir_node *block = get_nodes_block(div);
+ ir_node *block = get_irn_n(div, -1);
ir_mode *mode = get_irn_mode(n);
int bits = get_mode_size_bits(mode);
ir_node *q, *t, *c;
/* Do we need the shift */
if (mag.s > 0) {
- c = new_r_Const(current_ir_graph, block, mode_Iu, new_tarval_from_long(mag.s, mode_Iu));
+ c = new_r_Const_long(current_ir_graph, block, mode_Iu, mag.s);
q = new_rd_Shrs(dbg, current_ir_graph, block, q, c, mode);
}
/* final */
- c = new_r_Const(current_ir_graph, block, mode_Iu, new_tarval_from_long(bits-1, mode_Iu));
+ c = new_r_Const_long(current_ir_graph, block, mode_Iu, bits-1);
t = new_rd_Shr(dbg, current_ir_graph, block, q, c, mode);
q = new_rd_Add(dbg, current_ir_graph, block, q, t, mode);
t = new_rd_Add(dbg, current_ir_graph, block, t, q, mode);
- c = new_r_Const(current_ir_graph, block, mode_Iu, new_tarval_from_long(mag.s-1, mode_Iu));
+ c = new_r_Const_long(current_ir_graph, block, mode_Iu, mag.s-1);
q = new_rd_Shr(dbg, current_ir_graph, block, t, c, mode);
}
else {
}
}
else if (mag.s > 0) { /* default scheme, shift needed */
- c = new_r_Const(current_ir_graph, block, mode_Iu, new_tarval_from_long(mag.s, mode_Iu));
+ c = new_r_Const_long(current_ir_graph, block, mode_Iu, mag.s);
q = new_rd_Shr(dbg, current_ir_graph, block, q, c, mode);
}
}
return q;
}
+/* Replace Divs with Shifts and Add/Subs and Mulh. */
ir_node *arch_dep_replace_div_by_const(ir_node *irn)
{
ir_node *res = irn;
if (get_irn_op(c) != op_Const)
return irn;
+ tv = get_Const_tarval(c);
+
+ /* check for division by zero */
+ if (classify_tarval(tv) == TV_CLASSIFY_NULL)
+ return irn;
+
left = get_Div_left(irn);
mode = get_irn_mode(left);
- block = get_nodes_block(irn);
+ block = get_irn_n(irn, -1);
dbg = get_irn_dbg_info(irn);
- tv = get_Const_tarval(c);
bits = get_mode_size_bits(mode);
n = (bits + 7) / 8;
ir_node *curr = left;
if (k != 1) {
- k_node = new_r_Const(current_ir_graph, block, mode_Iu, new_tarval_from_long(k - 1, mode_Iu));
+ k_node = new_r_Const_long(current_ir_graph, block, mode_Iu, k - 1);
curr = new_rd_Shrs(dbg, current_ir_graph, block, left, k_node, mode);
}
- k_node = new_r_Const(current_ir_graph, block, mode_Iu, new_tarval_from_long(bits - k, mode_Iu));
+ k_node = new_r_Const_long(current_ir_graph, block, mode_Iu, bits - k);
curr = new_rd_Shr(dbg, current_ir_graph, block, curr, k_node, mode);
curr = new_rd_Add(dbg, current_ir_graph, block, left, curr, mode);
- k_node = new_r_Const(current_ir_graph, block, mode_Iu, new_tarval_from_long(k, mode_Iu));
+ k_node = new_r_Const_long(current_ir_graph, block, mode_Iu, k);
res = new_rd_Shrs(dbg, current_ir_graph, block, curr, k_node, mode);
if (n_flag) { /* negate the result */
else { /* unsigned case */
ir_node *k_node;
- k_node = new_r_Const(current_ir_graph, block, mode_Iu, new_tarval_from_long(k, mode_Iu));
+ k_node = new_r_Const_long(current_ir_graph, block, mode_Iu, k);
res = new_rd_Shr(dbg, current_ir_graph, block, left, k_node, mode);
}
}
else {
/* other constant */
- if ((mode_is_signed(mode) && params->allow_mulhs) ||
- (!mode_is_signed(mode) && params->allow_mulhu))
+ if (allow_Mulh(mode))
res = replace_div_by_mulh(irn, tv);
}
}
if (res != irn)
- stat_arch_dep_replace_div_by_const(irn);
+ hook_arch_dep_replace_division_by_const(irn);
return res;
}
+/* Replace Mods with Shifts and Add/Subs and Mulh. */
ir_node *arch_dep_replace_mod_by_const(ir_node *irn)
{
ir_node *res = irn;
if (get_irn_op(c) != op_Const)
return irn;
+ tv = get_Const_tarval(c);
+
+ /* check for division by zero */
+ if (classify_tarval(tv) == TV_CLASSIFY_NULL)
+ return irn;
+
left = get_Mod_left(irn);
mode = get_irn_mode(left);
- block = get_nodes_block(irn);
+ block = get_irn_n(irn, -1);
dbg = get_irn_dbg_info(irn);
- tv = get_Const_tarval(c);
-
bits = get_mode_size_bits(mode);
n = (bits + 7) / 8;
ir_node *curr = left;
if (k != 1) {
- k_node = new_r_Const(current_ir_graph, block, mode_Iu, new_tarval_from_long(k - 1, mode_Iu));
+ k_node = new_r_Const_long(current_ir_graph, block, mode_Iu, k - 1);
curr = new_rd_Shrs(dbg, current_ir_graph, block, left, k_node, mode);
}
- k_node = new_r_Const(current_ir_graph, block, mode_Iu, new_tarval_from_long(bits - k, mode_Iu));
+ k_node = new_r_Const_long(current_ir_graph, block, mode_Iu, bits - k);
curr = new_rd_Shr(dbg, current_ir_graph, block, curr, k_node, mode);
curr = new_rd_Add(dbg, current_ir_graph, block, left, curr, mode);
- k_node = new_r_Const(current_ir_graph, block, mode, new_tarval_from_long((-1) << k, mode));
+ k_node = new_r_Const_long(current_ir_graph, block, mode, (-1) << k);
curr = new_rd_And(dbg, current_ir_graph, block, curr, k_node, mode);
res = new_rd_Sub(dbg, current_ir_graph, block, left, curr, mode);
else { /* unsigned case */
ir_node *k_node;
- k_node = new_r_Const(current_ir_graph, block, mode, new_tarval_from_long((1 << k) - 1, mode));
+ k_node = new_r_Const_long(current_ir_graph, block, mode, (1 << k) - 1);
res = new_rd_And(dbg, current_ir_graph, block, left, k_node, mode);
}
}
else {
/* other constant */
- if ((mode_is_signed(mode) && params->allow_mulhs) ||
- (!mode_is_signed(mode) && params->allow_mulhu)) {
+ if (allow_Mulh(mode)) {
res = replace_div_by_mulh(irn, tv);
res = new_rd_Mul(dbg, current_ir_graph, block, res, c, mode);
}
if (res != irn)
- stat_arch_dep_replace_mod_by_const(irn);
+ hook_arch_dep_replace_division_by_const(irn);
return res;
}
+/* Replace DivMods with Shifts and Add/Subs and Mulh. */
void arch_dep_replace_divmod_by_const(ir_node **div, ir_node **mod, ir_node *irn)
{
*div = *mod = NULL;
if (get_irn_op(c) != op_Const)
return;
+ tv = get_Const_tarval(c);
+
+ /* check for division by zero */
+ if (classify_tarval(tv) == TV_CLASSIFY_NULL)
+ return;
+
left = get_DivMod_left(irn);
mode = get_irn_mode(left);
- block = get_nodes_block(irn);
+ block = get_irn_n(irn, -1);
dbg = get_irn_dbg_info(irn);
- tv = get_Const_tarval(c);
bits = get_mode_size_bits(mode);
n = (bits + 7) / 8;
ir_node *curr = left;
if (k != 1) {
- k_node = new_r_Const(current_ir_graph, block, mode_Iu, new_tarval_from_long(k - 1, mode_Iu));
+ k_node = new_r_Const_long(current_ir_graph, block, mode_Iu, k - 1);
curr = new_rd_Shrs(dbg, current_ir_graph, block, left, k_node, mode);
}
- k_node = new_r_Const(current_ir_graph, block, mode_Iu, new_tarval_from_long(bits - k, mode_Iu));
+ k_node = new_r_Const_long(current_ir_graph, block, mode_Iu, bits - k);
curr = new_rd_Shr(dbg, current_ir_graph, block, curr, k_node, mode);
curr = new_rd_Add(dbg, current_ir_graph, block, left, curr, mode);
- c_k = new_r_Const(current_ir_graph, block, mode_Iu, new_tarval_from_long(k, mode_Iu));
+ c_k = new_r_Const_long(current_ir_graph, block, mode_Iu, k);
*div = new_rd_Shrs(dbg, current_ir_graph, block, curr, c_k, mode);
*div = new_rd_Sub(dbg, current_ir_graph, block, k_node, *div, mode);
}
- k_node = new_r_Const(current_ir_graph, block, mode, new_tarval_from_long((-1) << k, mode));
+ k_node = new_r_Const_long(current_ir_graph, block, mode, (-1) << k);
curr = new_rd_And(dbg, current_ir_graph, block, curr, k_node, mode);
*mod = new_rd_Sub(dbg, current_ir_graph, block, left, curr, mode);
else { /* unsigned case */
ir_node *k_node;
- k_node = new_r_Const(current_ir_graph, block, mode_Iu, new_tarval_from_long(k, mode_Iu));
+ k_node = new_r_Const_long(current_ir_graph, block, mode_Iu, k);
*div = new_rd_Shr(dbg, current_ir_graph, block, left, k_node, mode);
- k_node = new_r_Const(current_ir_graph, block, mode, new_tarval_from_long((1 << k) - 1, mode));
+ k_node = new_r_Const_long(current_ir_graph, block, mode, (1 << k) - 1);
*mod = new_rd_And(dbg, current_ir_graph, block, left, k_node, mode);
}
}
else {
/* other constant */
- if ((mode_is_signed(mode) && params->allow_mulhs) ||
- (!mode_is_signed(mode) && params->allow_mulhu)) {
+ if (allow_Mulh(mode)) {
ir_node *t;
*div = replace_div_by_mulh(irn, tv);
}
if (*div)
- stat_arch_dep_replace_DivMod_by_const(irn);
+ hook_arch_dep_replace_division_by_const(irn);
}
32 /* Mulh allowed up to 32 bit */
};
+/* A default parameter factory for testing purposes. */
const arch_dep_params_t *arch_dep_default_factory(void) {
return &default_params;
}
projects / libfirm / blobdiff