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tcg-arm: Use movi32 + blx for calls on v7 

Work better with branch predition when we have movw+movt,
as the size of the code is the same.  Perhaps re-evaluate
when we have a proper constant pool.

Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2013-03-13 13:40:43 -07:00 committed by Aurelien Jarno
parent 595b5397cc
commit 302fdde73f
1 changed files with 3 additions and 0 deletions
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3
tcg/arm/tcg-target.c
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@ -1016,6 +1016,9 @@ static inline void tcg_out_call(TCGContext *s, uint32_t addr)
} else { } else {
tcg_out_bl(s, COND_AL, val); tcg_out_bl(s, COND_AL, val);
} }
} else if (use_armv7_instructions) {
tcg_out_movi32(s, COND_AL, TCG_REG_TMP, addr);
tcg_out_blx(s, COND_AL, TCG_REG_TMP);
} else { } else {
tcg_out_dat_imm(s, COND_AL, ARITH_ADD, TCG_REG_R14, TCG_REG_PC, 4); tcg_out_dat_imm(s, COND_AL, ARITH_ADD, TCG_REG_R14, TCG_REG_PC, 4);
tcg_out_ld32_12(s, COND_AL, TCG_REG_PC, TCG_REG_PC, -4); tcg_out_ld32_12(s, COND_AL, TCG_REG_PC, TCG_REG_PC, -4);