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57a269469d
A new shared header tcg-pool.inc.c adds new_pool_label, for registering a tcg_target_ulong to be emitted after the generated code, plus relocation data to install a pointer to the data. A new pointer is added to the TCGContext, so that we dump the constant pool as data, not code. Signed-off-by: Richard Henderson <rth@twiddle.net>
86 lines
2.7 KiB
C
86 lines
2.7 KiB
C
/*
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* TCG Backend Data: constant pool.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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typedef struct TCGLabelPoolData {
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struct TCGLabelPoolData *next;
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tcg_target_ulong data;
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tcg_insn_unit *label;
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intptr_t addend;
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int type;
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} TCGLabelPoolData;
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static void new_pool_label(TCGContext *s, tcg_target_ulong data, int type,
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tcg_insn_unit *label, intptr_t addend)
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{
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TCGLabelPoolData *n = tcg_malloc(sizeof(*n));
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TCGLabelPoolData *i, **pp;
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n->data = data;
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n->label = label;
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n->type = type;
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n->addend = addend;
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/* Insertion sort on the pool. */
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for (pp = &s->pool_labels; (i = *pp) && i->data < data; pp = &i->next) {
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continue;
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}
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n->next = *pp;
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*pp = n;
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}
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/* To be provided by cpu/tcg-target.inc.c. */
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static void tcg_out_nop_fill(tcg_insn_unit *p, int count);
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static bool tcg_out_pool_finalize(TCGContext *s)
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{
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TCGLabelPoolData *p = s->pool_labels;
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tcg_target_ulong d, *a;
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if (p == NULL) {
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return true;
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}
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/* ??? Round up to qemu_icache_linesize, but then do not round
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again when allocating the next TranslationBlock structure. */
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a = (void *)ROUND_UP((uintptr_t)s->code_ptr, sizeof(tcg_target_ulong));
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tcg_out_nop_fill(s->code_ptr, (tcg_insn_unit *)a - s->code_ptr);
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s->data_gen_ptr = a;
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/* Ensure the first comparison fails. */
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d = p->data + 1;
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for (; p != NULL; p = p->next) {
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if (p->data != d) {
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d = p->data;
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if (unlikely((void *)a > s->code_gen_highwater)) {
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return false;
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}
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*a++ = d;
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}
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patch_reloc(p->label, p->type, (intptr_t)(a - 1), p->addend);
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}
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s->code_ptr = (void *)a;
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return true;
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}
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