diff options
author | David Hildenbrand <david@redhat.com> | 2019-02-25 16:42:04 +0100 |
---|---|---|
committer | Richard Henderson <richard.henderson@linaro.org> | 2019-04-24 13:04:33 -0700 |
commit | 2089fcc9e7b4174d1c351eaa7d277c02188a6dd2 (patch) | |
tree | f085a7f81cd5c060c546d3d7672d65d55a126106 /tcg/tcg-op.c | |
parent | 3284aa128153750f14a61e8a96fd085e6f2999b6 (diff) | |
download | qemu-2089fcc9e7b4174d1c351eaa7d277c02188a6dd2.zip qemu-2089fcc9e7b4174d1c351eaa7d277c02188a6dd2.tar.gz qemu-2089fcc9e7b4174d1c351eaa7d277c02188a6dd2.tar.bz2 |
tcg: Implement tcg_gen_extract2_{i32,i64}
Will be helpful for s390x. Input 128 bit and output 64 bit only,
which is sufficient for now.
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20190225154204.26751-1-david@redhat.com>
[rth: Add matching tcg_gen_extract2_i32.]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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 1bd7ef2..7c56c92 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) { |