2 * regalloc.c: register state class
5 * Paolo Molaro (lupus@ximian.com)
7 * (C) 2003 Ximian, Inc.
12 mono_regstate_new (void)
14 MonoRegState* rs = g_new0 (MonoRegState, 1);
16 mono_regstate_reset (rs);
22 mono_regstate_free (MonoRegState *rs) {
28 mono_regstate_reset (MonoRegState *rs) {
29 rs->next_vireg = MONO_MAX_IREGS;
30 rs->next_vfreg = MONO_MAX_FREGS;
34 mono_regstate_assign (MonoRegState *rs) {
37 rs->iassign = g_malloc (MAX (MONO_MAX_IREGS, rs->next_vireg));
38 for (i = 0; i < MONO_MAX_IREGS; ++i) {
40 rs->isymbolic [i] = 0;
42 for (; i < rs->next_vireg; ++i)
45 rs->fassign = g_malloc (MAX (MONO_MAX_FREGS, rs->next_vfreg));
46 for (i = 0; i < MONO_MAX_FREGS; ++i) {
48 rs->fsymbolic [i] = 0;
50 for (; i < rs->next_vfreg; ++i)
55 mono_regstate_alloc_int (MonoRegState *rs, regmask_t allow)
58 regmask_t mask = allow & rs->ifree_mask;
59 for (i = 0; i < MONO_MAX_IREGS; ++i) {
60 if (mask & (1 << i)) {
61 rs->ifree_mask &= ~ (1 << i);
69 mono_regstate_free_int (MonoRegState *rs, int reg)
72 rs->ifree_mask |= 1 << reg;
73 rs->isymbolic [reg] = 0;
78 mono_regstate_alloc_float (MonoRegState *rs, regmask_t allow)
81 regmask_t mask = allow & rs->ffree_mask;
82 for (i = 0; i < MONO_MAX_FREGS; ++i) {
83 if (mask & (1 << i)) {
84 rs->ffree_mask &= ~ (1 << i);
92 mono_regstate_free_float (MonoRegState *rs, int reg)
95 rs->ffree_mask |= 1 << reg;
96 rs->fsymbolic [reg] = 0;
101 mono_regstate_next_long (MonoRegState *rs)
103 int rval = rs->next_vireg;