diff options
Diffstat (limited to 'tcg/tcg-op.c')
| -rw-r--r-- | tcg/tcg-op.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/tcg/tcg-op.c b/tcg/tcg-op.c index 1bd7ef24af..7c56c92c8e 100644 --- a/tcg/tcg-op.c +++ b/tcg/tcg-op.c @@ -809,6 +809,28 @@ void tcg_gen_sextract_i32(TCGv_i32 ret, TCGv_i32 arg, tcg_gen_sari_i32(ret, ret, 32 - len); } +/* + * Extract 32-bits from a 64-bit input, ah:al, starting from ofs. + * Unlike tcg_gen_extract_i32 above, len is fixed at 32. + */ +void tcg_gen_extract2_i32(TCGv_i32 ret, TCGv_i32 al, TCGv_i32 ah, + unsigned int ofs) +{ + tcg_debug_assert(ofs <= 32); + if (ofs == 0) { + tcg_gen_mov_i32(ret, al); + } else if (ofs == 32) { + tcg_gen_mov_i32(ret, ah); + } else if (al == ah) { + tcg_gen_rotri_i32(ret, al, ofs); + } else { + TCGv_i32 t0 = tcg_temp_new_i32(); + tcg_gen_shri_i32(t0, al, ofs); + tcg_gen_deposit_i32(ret, t0, ah, 32 - ofs, ofs); + tcg_temp_free_i32(t0); + } +} + void tcg_gen_movcond_i32(TCGCond cond, TCGv_i32 ret, TCGv_i32 c1, TCGv_i32 c2, TCGv_i32 v1, TCGv_i32 v2) { @@ -2297,6 +2319,28 @@ void tcg_gen_sextract_i64(TCGv_i64 ret, TCGv_i64 arg, tcg_gen_sari_i64(ret, ret, 64 - len); } +/* + * Extract 64 bits from a 128-bit input, ah:al, starting from ofs. + * Unlike tcg_gen_extract_i64 above, len is fixed at 64. + */ +void tcg_gen_extract2_i64(TCGv_i64 ret, TCGv_i64 al, TCGv_i64 ah, + unsigned int ofs) +{ + tcg_debug_assert(ofs <= 64); + if (ofs == 0) { + tcg_gen_mov_i64(ret, al); + } else if (ofs == 64) { + tcg_gen_mov_i64(ret, ah); + } else if (al == ah) { + tcg_gen_rotri_i64(ret, al, ofs); + } else { + TCGv_i64 t0 = tcg_temp_new_i64(); + tcg_gen_shri_i64(t0, al, ofs); + tcg_gen_deposit_i64(ret, t0, ah, 64 - ofs, ofs); + tcg_temp_free_i64(t0); + } +} + void tcg_gen_movcond_i64(TCGCond cond, TCGv_i64 ret, TCGv_i64 c1, TCGv_i64 c2, TCGv_i64 v1, TCGv_i64 v2) { |