diff options
Diffstat (limited to 'tcg')
| -rw-r--r-- | tcg/README | 4 | ||||
| -rw-r--r-- | tcg/tcg-op.h | 17 |
2 files changed, 21 insertions, 0 deletions
diff --git a/tcg/README b/tcg/README index b03432e23a..b4d07b6f42 100644 --- a/tcg/README +++ b/tcg/README @@ -265,6 +265,10 @@ Convert t1 (32 bit) to t0 (64 bit) and does zero extension * trunc_i64_i32 t0, t1 Truncate t1 (64 bit) to t0 (32 bit) +* concat_i32_i64 t0, t1, t2 +Construct t0 (64-bit) taking the low half from t1 (32 bit) and the high half +from t2 (32 bit). + ********* Load/Store * ld_i32/i64 t0, t1, offset diff --git a/tcg/tcg-op.h b/tcg/tcg-op.h index bc6be8537e..7b39fe865a 100644 --- a/tcg/tcg-op.h +++ b/tcg/tcg-op.h @@ -1395,6 +1395,23 @@ static inline void tcg_gen_discard_i64(TCGv arg) } #endif +static inline void tcg_gen_concat_i32_i64(TCGv dest, TCGv low, TCGv high) +{ +#if TCG_TARGET_REG_BITS == 32 + tcg_gen_mov_i32(dest, low); + tcg_gen_mov_i32(TCGV_HIGH(dest), high); +#else + TCGv tmp = tcg_temp_new (TCG_TYPE_I64); + /* This extension is only needed for type correctness. + We may be able to do better given target specific information. */ + tcg_gen_extu_i32_i64(tmp, high); + tcg_gen_shli_i64(tmp, tmp, 32); + tcg_gen_extu_i32_i64(dest, low); + tcg_gen_or_i64(dest, dest, tmp); + tcg_temp_free(tmp); +#endif +} + /***************************************/ /* QEMU specific operations. Their type depend on the QEMU CPU type. */ |