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tcg: optimize tcg_gen_bswap16_i32

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Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6831 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aurel32 2009-03-13 09:35:03 +00:00
parent 84aafb06ff
commit dfa1a3f1c4
1 changed files with 5 additions and 8 deletions
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13
tcg/tcg-op.h
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@ -1207,16 +1207,13 @@ static inline void tcg_gen_bswap16_i32(TCGv_i32 ret, TCGv_i32 arg)
#ifdef TCG_TARGET_HAS_bswap16_i32
tcg_gen_op2_i32(INDEX_op_bswap16_i32, ret, arg);
#else
TCGv_i32 t0, t1;
t0 = tcg_temp_new_i32();
t1 = tcg_temp_new_i32();
TCGv_i32 t0 = tcg_temp_new_i32();
tcg_gen_shri_i32(t0, arg, 8);
tcg_gen_andi_i32(t1, arg, 0x000000ff);
tcg_gen_shli_i32(t1, t1, 8);
tcg_gen_or_i32(ret, t0, t1);
tcg_gen_ext8u_i32(t0, arg);
tcg_gen_shli_i32(t0, t0, 8);
tcg_gen_shri_i32(ret, arg, 8);
tcg_gen_or_i32(ret, ret, t0);
tcg_temp_free_i32(t0);
tcg_temp_free_i32(t1);
#endif
}