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TCG op size estimation fix. 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4154 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
pbrook 2008-03-31 17:07:36 +00:00
parent 663715fbe2
commit a208e54a2f
3 changed files with 10 additions and 0 deletions
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6
exec-all.h
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@ -36,6 +36,12 @@ struct TranslationBlock;
#define OPC_BUF_SIZE 512
#define OPC_MAX_SIZE (OPC_BUF_SIZE - MAX_OP_PER_INSTR)
/* Maximum size a TCG op can expand to. This is complicated because a
single op may require several host instructions and regirster reloads.
For now take a wild guess at 128 bytes, which should allow at least
a couple of fixup instructions per argument. */
#define TCG_MAX_OP_SIZE 128
#define OPPARAM_BUF_SIZE (OPC_BUF_SIZE * MAX_OPC_PARAM)
extern target_ulong gen_opc_pc[OPC_BUF_SIZE];

3
exec.c
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@ -367,6 +367,9 @@ void tb_flush(CPUState *env1)
nb_tbs, nb_tbs > 0 ?
((unsigned long)(code_gen_ptr - code_gen_buffer)) / nb_tbs : 0);
#endif
if ((unsigned long)(code_gen_ptr - code_gen_buffer) > CODE_GEN_BUFFER_SIZE)
cpu_abort(env1, "Internal error: code buffer overflow\n");
nb_tbs = 0;
for(env = first_cpu; env != NULL; env = env->next_cpu) {

1
translate-all.c
View File

@ -71,6 +71,7 @@ unsigned long code_gen_max_block_size(void)
static unsigned long max;
if (max == 0) {
max = TCG_MAX_OP_SIZE;
#define DEF(s, n, copy_size) max = copy_size > max? copy_size : max;
#include "tcg-opc.h"
#undef DEF