diff options
| -rw-r--r-- | gcc/config/riscv/constraints.md | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/gcc/config/riscv/constraints.md b/gcc/config/riscv/constraints.md index 2873d53..8997284 100644 --- a/gcc/config/riscv/constraints.md +++ b/gcc/config/riscv/constraints.md @@ -108,3 +108,23 @@ A constant @code{move_operand}." (and (match_operand 0 "move_operand") (match_test "CONSTANT_P (op)"))) + +;; Vector constraints. + +(define_register_constraint "vr" "TARGET_VECTOR ? V_REGS : NO_REGS" + "A vector register (if available).") + +(define_register_constraint "vd" "TARGET_VECTOR ? VD_REGS : NO_REGS" + "A vector register except mask register (if available).") + +(define_register_constraint "vm" "TARGET_VECTOR ? VM_REGS : NO_REGS" + "A vector mask register (if available).") + +;; This constraint is used to match instruction "csrr %0, vlenb" which is generated in "mov<mode>". +;; VLENB is a run-time constant which represent the vector register length in bytes. +;; BYTES_PER_RISCV_VECTOR represent runtime invariant of vector register length in bytes. +;; We should only allow the poly equal to BYTES_PER_RISCV_VECTOR. +(define_constraint "vp" + "POLY_INT" + (and (match_code "const_poly_int") + (match_test "known_eq (rtx_to_poly_int64 (op), BYTES_PER_RISCV_VECTOR)"))) |