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* [Bug target/79185] [8 Regression] register allocation in the addition of two 128/9 bit ints [not found] <bug-79185-4@http.gcc.gnu.org/bugzilla/> @ 2021-05-14 10:10 ` jakub at gcc dot gnu.org 2021-06-11 10:05 ` drraph at gmail dot com 1 sibling, 0 replies; 2+ messages in thread From: jakub at gcc dot gnu.org @ 2021-05-14 10:10 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79185 Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Target Milestone|8.5 |9.0 Status|NEW |RESOLVED Resolution|--- |FIXED --- Comment #16 from Jakub Jelinek <jakub at gcc dot gnu.org> --- 8 branch is being closed, fixed in 9.0. ^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug target/79185] [8 Regression] register allocation in the addition of two 128/9 bit ints [not found] <bug-79185-4@http.gcc.gnu.org/bugzilla/> 2021-05-14 10:10 ` [Bug target/79185] [8 Regression] register allocation in the addition of two 128/9 bit ints jakub at gcc dot gnu.org @ 2021-06-11 10:05 ` drraph at gmail dot com 1 sibling, 0 replies; 2+ messages in thread From: drraph at gmail dot com @ 2021-06-11 10:05 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79185 --- Comment #17 from Raphael C <drraph at gmail dot com> --- Tested in gcc 11.1 with -O2 ai(__int128, __int128): mov r9, rdi mov rax, rdx mov r8, rsi mov rdx, rcx add rax, r9 adc rdx, r8 ret This looks like two more mov's than needed but I may be wrong. By contrast clang gives ai(__int128, __int128): mov rax, rdi add rax, rdx adc rsi, rcx mov rdx, rsi ret ^ permalink raw reply [flat|nested] 2+ messages in thread
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[not found] <bug-79185-4@http.gcc.gnu.org/bugzilla/>
2021-05-14 10:10 ` [Bug target/79185] [8 Regression] register allocation in the addition of two 128/9 bit ints jakub at gcc dot gnu.org
2021-06-11 10:05 ` drraph at gmail dot com
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