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author | Aurelien Jarno <aurelien@aurel32.net> | 2012-10-09 21:53:06 +0200 |
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committer | Aurelien Jarno <aurelien@aurel32.net> | 2012-10-28 14:54:21 +0100 |
commit | 7f6ceedf9c5da96ee2b1fe42573b781243bc2828 (patch) | |
tree | 476019fca19a8eaabafa70864701a953977dcdcc | |
parent | 639368dd685f89b0567b56304c62937ad0ef8248 (diff) | |
download | qemu-7f6ceedf9c5da96ee2b1fe42573b781243bc2828.zip qemu-7f6ceedf9c5da96ee2b1fe42573b781243bc2828.tar.gz qemu-7f6ceedf9c5da96ee2b1fe42573b781243bc2828.tar.bz2 |
tcg: add tcg_reg_sync()
Add a new function tcg_reg_sync() to synchronize the canonical location
of a temp with the value in the associated register, but without freeing
it. Rewrite tcg_reg_free() to first call tcg_reg_sync() and then to free
the register.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
-rw-r--r-- | tcg/tcg.c | 29 |
1 files changed, 20 insertions, 9 deletions
@@ -1517,22 +1517,33 @@ static void temp_allocate_frame(TCGContext *s, int temp) s->current_frame_offset += (tcg_target_long)sizeof(tcg_target_long); } +/* sync register 'reg' by saving it to the corresponding temporary */ +static inline void tcg_reg_sync(TCGContext *s, int reg) +{ + TCGTemp *ts; + int temp; + + temp = s->reg_to_temp[reg]; + ts = &s->temps[temp]; + assert(ts->val_type == TEMP_VAL_REG); + if (!ts->mem_coherent && !ts->fixed_reg) { + if (!ts->mem_allocated) { + temp_allocate_frame(s, temp); + } + tcg_out_st(s, ts->type, reg, ts->mem_reg, ts->mem_offset); + } + ts->mem_coherent = 1; +} + /* free register 'reg' by spilling the corresponding temporary if necessary */ static void tcg_reg_free(TCGContext *s, int reg) { - TCGTemp *ts; int temp; temp = s->reg_to_temp[reg]; if (temp != -1) { - ts = &s->temps[temp]; - assert(ts->val_type == TEMP_VAL_REG); - if (!ts->mem_coherent) { - if (!ts->mem_allocated) - temp_allocate_frame(s, temp); - tcg_out_st(s, ts->type, reg, ts->mem_reg, ts->mem_offset); - } - ts->val_type = TEMP_VAL_MEM; + tcg_reg_sync(s, reg); + s->temps[temp].val_type = TEMP_VAL_MEM; s->reg_to_temp[reg] = -1; } } |