diff options
| author | Bastian Koppelmann <kbastian@mail.uni-paderborn.de> | 2023-06-14 12:00:37 +0200 |
|---|---|---|
| committer | Bastian Koppelmann <kbastian@mail.uni-paderborn.de> | 2023-06-21 18:09:48 +0200 |
| commit | 4e3377bb5abe8914eec0650730536d5d48e22008 (patch) | |
| tree | 5d94ae4c13a34a65715d31742d8e96a58f12f9d0 /target/tricore/op_helper.c | |
| parent | 0eaafe33d03447f36ff152010836d501ba68c710 (diff) | |
target/tricore: Add shuffle insn
this is based on code by volumit (https://github.com/volumit/qemu/).
Reported in https://gitlab.com/qemu-project/qemu/-/issues/1667
and https://gitlab.com/qemu-project/qemu/-/issues/1452.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Message-Id: <20230614100039.1337971-7-kbastian@mail.uni-paderborn.de>
Diffstat (limited to 'target/tricore/op_helper.c')
| -rw-r--r-- | target/tricore/op_helper.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/target/tricore/op_helper.c b/target/tricore/op_helper.c index b6ef1462e4..026e15f3e0 100644 --- a/target/tricore/op_helper.c +++ b/target/tricore/op_helper.c @@ -2308,6 +2308,42 @@ uint32_t helper_crc32_le(uint32_t arg0, uint32_t arg1) return crc32(arg1, buf, 4); } +uint32_t helper_shuffle(uint32_t arg0, uint32_t arg1) +{ + uint32_t resb; + uint32_t byte_select; + uint32_t res = 0; + + byte_select = arg1 & 0x3; + resb = extract32(arg0, byte_select * 8, 8); + res |= resb << 0; + + byte_select = (arg1 >> 2) & 0x3; + resb = extract32(arg0, byte_select * 8, 8); + res |= resb << 8; + + byte_select = (arg1 >> 4) & 0x3; + resb = extract32(arg0, byte_select * 8, 8); + res |= resb << 16; + + byte_select = (arg1 >> 6) & 0x3; + resb = extract32(arg0, byte_select * 8, 8); + res |= resb << 24; + + if (arg1 & 0x100) { + /* Assign the correct nibble position. */ + res = ((res & 0xf0f0f0f0) >> 4) + | ((res & 0x0f0f0f0f) << 4); + /* Assign the correct bit position. */ + res = ((res & 0x88888888) >> 3) + | ((res & 0x44444444) >> 1) + | ((res & 0x22222222) << 1) + | ((res & 0x11111111) << 3); + } + + return res; +} + /* context save area (CSA) related helpers */ static int cdc_increment(target_ulong *psw) |