diff options
| author | Richard Henderson | 2020-12-14 23:13:55 +0100 |
|---|---|---|
| committer | Cornelia Huck | 2020-12-21 18:11:33 +0100 |
| commit | a2db06da7dff662159c809059cda5e2aa302ec86 (patch) | |
| tree | ca594af1e916b3496fb5f8c276fae0e2687c5c4e /target/s390x/insn-data.def | |
| parent | target/s390x: Improve ADD LOGICAL WITH CARRY (diff) | |
| download | qemu-a2db06da7dff662159c809059cda5e2aa302ec86.tar.gz qemu-a2db06da7dff662159c809059cda5e2aa302ec86.tar.xz qemu-a2db06da7dff662159c809059cda5e2aa302ec86.zip | |
target/s390x: Improve cc computation for SUBTRACT LOGICAL
The resulting cc is only dependent on the result and the carry-out.
Carry-out and borrow-out are inverses, so are trivially converted.
With tcg ops, it is easier to compute borrow-out than carry-out, so
save result and borrow-out rather than the inputs.
Borrow-out for 64-bit inputs is had via tcg_gen_sub2_i64 directly
into cc_src. Borrow-out for 32-bit inputs is had via extraction
from a normal 64-bit sub (with zero-extended inputs).
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20201214221356.68039-4-richard.henderson@linaro.org>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Diffstat (limited to 'target/s390x/insn-data.def')
| -rw-r--r-- | target/s390x/insn-data.def | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/target/s390x/insn-data.def b/target/s390x/insn-data.def index e380723dcd..7ff3e7e517 100644 --- a/target/s390x/insn-data.def +++ b/target/s390x/insn-data.def @@ -900,21 +900,21 @@ C(0xb9c9, SHHHR, RRF_a, HW, r2_sr32, r3_sr32, new, r1_32h, sub, subs32) C(0xb9d9, SHHLR, RRF_a, HW, r2_sr32, r3, new, r1_32h, sub, subs32) /* SUBTRACT LOGICAL */ - C(0x1f00, SLR, RR_a, Z, r1, r2, new, r1_32, sub, subu32) - C(0xb9fb, SLRK, RRF_a, DO, r2, r3, new, r1_32, sub, subu32) - C(0x5f00, SL, RX_a, Z, r1, m2_32u, new, r1_32, sub, subu32) - C(0xe35f, SLY, RXY_a, LD, r1, m2_32u, new, r1_32, sub, subu32) - C(0xb90b, SLGR, RRE, Z, r1, r2, r1, 0, sub, subu64) - C(0xb91b, SLGFR, RRE, Z, r1, r2_32u, r1, 0, sub, subu64) - C(0xb9eb, SLGRK, RRF_a, DO, r2, r3, r1, 0, sub, subu64) - C(0xe30b, SLG, RXY_a, Z, r1, m2_64, r1, 0, sub, subu64) - C(0xe31b, SLGF, RXY_a, Z, r1, m2_32u, r1, 0, sub, subu64) + C(0x1f00, SLR, RR_a, Z, r1_32u, r2_32u, new, r1_32, sub, subu32) + C(0xb9fb, SLRK, RRF_a, DO, r2_32u, r3_32u, new, r1_32, sub, subu32) + C(0x5f00, SL, RX_a, Z, r1_32u, m2_32u, new, r1_32, sub, subu32) + C(0xe35f, SLY, RXY_a, LD, r1_32u, m2_32u, new, r1_32, sub, subu32) + C(0xb90b, SLGR, RRE, Z, r1, r2, r1, 0, subu64, subu64) + C(0xb91b, SLGFR, RRE, Z, r1, r2_32u, r1, 0, subu64, subu64) + C(0xb9eb, SLGRK, RRF_a, DO, r2, r3, r1, 0, subu64, subu64) + C(0xe30b, SLG, RXY_a, Z, r1, m2_64, r1, 0, subu64, subu64) + C(0xe31b, SLGF, RXY_a, Z, r1, m2_32u, r1, 0, subu64, subu64) /* SUBTRACT LOCICAL HIGH */ C(0xb9cb, SLHHHR, RRF_a, HW, r2_sr32, r3_sr32, new, r1_32h, sub, subu32) - C(0xb9db, SLHHLR, RRF_a, HW, r2_sr32, r3, new, r1_32h, sub, subu32) + C(0xb9db, SLHHLR, RRF_a, HW, r2_sr32, r3_32u, new, r1_32h, sub, subu32) /* SUBTRACT LOGICAL IMMEDIATE */ - C(0xc205, SLFI, RIL_a, EI, r1, i2_32u, new, r1_32, sub, subu32) - C(0xc204, SLGFI, RIL_a, EI, r1, i2_32u, r1, 0, sub, subu64) + C(0xc205, SLFI, RIL_a, EI, r1_32u, i2_32u, new, r1_32, sub, subu32) + C(0xc204, SLGFI, RIL_a, EI, r1, i2_32u, r1, 0, subu64, subu64) /* SUBTRACT LOGICAL WITH BORROW */ C(0xb999, SLBR, RRE, Z, r1, r2, new, r1_32, subb, subb32) C(0xb989, SLBGR, RRE, Z, r1, r2, r1, 0, subb, subb64) |