https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96898
--- Comment #7 from Tom de Vries <vries at gcc dot gnu.org> --- (In reply to Tom de Vries from comment #6) > Created attachment 49195 [details] > Tentative patch > > Introduces an option -fatomic-libcalls (analogous to -fsync-libcalls) such > that __atomic_test_and_set maps onto libatomic function > __atomic_test_and_set_1. I've now achieved the same in the target, not relying on a new option: ... diff --git a/gcc/config/nvptx/nvptx.md b/gcc/config/nvptx/nvptx.md index 4168190fa42..6178e6a0f77 100644 --- a/gcc/config/nvptx/nvptx.md +++ b/gcc/config/nvptx/nvptx.md @@ -1667,6 +1667,22 @@ "%.\\tatom%A1.b%T0.<logic>\\t%0, %1, %2;" [(set_attr "atomic" "true")]) +(define_expand "atomic_test_and_set" + [(match_operand:SI 0 "nvptx_register_operand") ;; output + (match_operand:QI 1 "memory_operand") ;; memory + (match_operand:SI 2 "const_int_operand")] ;; model + "" +{ + rtx libfunc; + rtx addr; + libfunc = init_one_libfunc ("__atomic_test_and_set_1"); + addr = convert_memory_address (ptr_mode, XEXP (operands[1], 0)); + emit_library_call_value (libfunc, operands[0], LCT_NORMAL, SImode, + addr, ptr_mode, + operands[2], SImode); + DONE; +}) + (define_insn "nvptx_barsync" [(unspec_volatile [(match_operand:SI 0 "nvptx_nonmemory_operand" "Ri") (match_operand:SI 1 "const_int_operand")] ...