hppa: Implement TARGET_ATOMIC_ASSIGN_EXPAND_FENV
This change implements __builtin_get_fpsr() and __builtin_set_fpsr(x)
to get and set the floating-point status register. They are used to
implement pa_atomic_assign_expand_fenv().
2024-02-02 John David Anglin <danglin@gcc.gnu.org>
gcc/ChangeLog:
PR target/59778
* config/pa/pa.cc (enum pa_builtins): Add PA_BUILTIN_GET_FPSR
and PA_BUILTIN_SET_FPSR builtins.
* (pa_builtins_icode): Declare.
* (def_builtin, pa_fpu_init_builtins): New.
* (pa_init_builtins): Initialize FPU builtins.
* (pa_builtin_decl, pa_expand_builtin_1): New.
* (pa_expand_builtin): Handle PA_BUILTIN_GET_FPSR and
PA_BUILTIN_SET_FPSR builtins.
* (pa_atomic_assign_expand_fenv): New.
* config/pa/pa.md (UNSPECV_GET_FPSR, UNSPECV_SET_FPSR): New
UNSPECV constants.
(get_fpsr, put_fpsr): New expanders.
(get_fpsr_32, get_fpsr_64, set_fpsr_32, set_fpsr_64): New
insn patterns.