This series moves all existing DFP instructions to decodetree and implements the 2 new instructions (dcffixqq and dctfixqq) from Power ISA 3.1.
In order to implement dcffixqq, divu128/divs128 were modified to support 128-bit quotients (previously, they were limited to 64-bit quotients), along with adjustments being made to its existing callers. libdecnumber was also expanded to allow creating decimal numbers from 128-bit integers. Similarly, for dctfixqq, mulu128 (host-utils) and decNumberIntegralToInt128 (libdecnumber) were introduced to support 128-bit integers. The remaining patches of this series move all of the already existing DFP instructions to decodetree, and end up removing dfp-ops.c.inc, which is no longer needed. NOTE 1: The previous, non-decodetree code, was updating ctx->nip for all the DFP instructions. I've removed that, but it would be great if someone could confirm that updating nip really wasn't necessary. NOTE 2: Some arithmetic function support for 128-bit integers was added, for now, still using 64-bit pairs. In the near future, I think we should modify all of them to use Int128 (and introduce UInt128). But that should be done in another patch series. Based-on: 20210823150235.35759-1-luis.pi...@eldorado.org.br (target/ppc: fix setting of CR flags in bcdcfsq) -- Luis Pires Instituto de Pesquisas ELDORADO Aviso Legal - Disclaimer <https://www.eldorado.org.br/disclaimer.html> Bruno Larsen (1): target/ppc: Move REQUIRE_ALTIVEC/VECTOR to translate.c Fernando Valle (1): target/ppc: Introduce REQUIRE_FPU Luis Pires (17): host-utils: Fix overflow detection in divu128() host-utils: move abs64() to host-utils host-utils: move checks out of divu128/divs128 host-utils: add 128-bit quotient support to divu128/divs128 host-utils: add unit tests for divu128/divs128 libdecnumber: introduce decNumberFrom[U]Int128 target/ppc: Implement DCFFIXQQ host-utils: Introduce mulu128 libdecnumber: Introduce decNumberIntegralToInt128 target/ppc: Implement DCTFIXQQ target/ppc: Move dtstdc[q]/dtstdg[q] to decodetree target/ppc: Move d{add,sub,mul,div,iex}[q] to decodetree target/ppc: Move dcmp{u,o}[q],dts{tex,tsf,tsfi}[q] to decodetree target/ppc: Move dquai[q], drint{x,n}[q] to decodetree target/ppc: Move dqua[q], drrnd[q] to decodetree target/ppc: Move dct{dp,qpq},dr{sp,dpq},dc{f,t}fix[q],dxex[q] to decodetree target/ppc: Move ddedpd[q],denbcd[q],dscli[q],dscri[q] to decodetree hw/i386/kvm/i8254.c | 5 - include/hw/clock.h | 7 +- include/libdecnumber/decNumber.h | 4 + include/libdecnumber/decNumberLocal.h | 2 +- include/qemu/host-utils.h | 86 +++-- libdecnumber/decContext.c | 7 +- libdecnumber/decNumber.c | 130 ++++++++ target/ppc/dfp_helper.c | 168 +++++++--- target/ppc/helper.h | 106 ++++--- target/ppc/insn32.decode | 171 ++++++++++ target/ppc/int_helper.c | 23 +- target/ppc/translate.c | 25 +- target/ppc/translate/dfp-impl.c.inc | 419 ++++++++++++------------- target/ppc/translate/dfp-ops.c.inc | 165 ---------- target/ppc/translate/vector-impl.c.inc | 10 +- tests/unit/meson.build | 1 + tests/unit/test-div128.c | 185 +++++++++++ util/host-utils.c | 137 +++++--- 18 files changed, 1072 insertions(+), 579 deletions(-) delete mode 100644 target/ppc/translate/dfp-ops.c.inc create mode 100644 tests/unit/test-div128.c -- 2.25.1
