;; Constraint definitions for MIPS. ;; Copyright (C) 2006-2021 Free Software Foundation, Inc. ;; ;; This file is part of GCC. ;; ;; GCC is free software; you can redistribute it and/or modify ;; it under the terms of the GNU General Public License as published by ;; the Free Software Foundation; either version 3, or (at your option) ;; any later version. ;; ;; GCC is distributed in the hope that it will be useful, ;; but WITHOUT ANY WARRANTY; without even the implied warranty of ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ;; GNU General Public License for more details. ;; ;; You should have received a copy of the GNU General Public License ;; along with GCC; see the file COPYING3. If not see ;; http://www.gnu.org/licenses/.

;; Register constraints

(define_register_constraint “d” “TARGET_MIPS16 ? M16_REGS : GR_REGS” “A general-purpose register. This is equivalent to @code{r} unless generating MIPS16 code, in which case the MIPS16 register set is used.”)

(define_register_constraint “t” “T_REG” “@internal”)

(define_register_constraint “f” “TARGET_HARD_FLOAT ? FP_REGS : NO_REGS” “A floating-point register (if available).”)

(define_register_constraint “h” “NO_REGS” “Formerly the @code{hi} register. This constraint is no longer supported.”)

(define_register_constraint “l” “TARGET_BIG_ENDIAN ? MD1_REG : MD0_REG” “The @code{lo} register. Use this register to store values that are no bigger than a word.”)

(define_register_constraint “x” “MD_REGS” “The concatenated @code{hi} and @code{lo} registers. Use this register to store doubleword values.”)

(define_register_constraint “b” “ALL_REGS” “@internal”)

(define_register_constraint “u” “M16_REGS” “@internal”)

;; MIPS16 code always calls through a MIPS16 register; see mips_emit_call_insn ;; for details. (define_register_constraint “c” “TARGET_MIPS16 ? M16_REGS : TARGET_USE_PIC_FN_ADDR_REG ? PIC_FN_ADDR_REG : GR_REGS” “A register suitable for use in an indirect jump. This will always be @code{$25} for @option{-mabicalls}.”)

(define_register_constraint “e” “LEA_REGS” “@internal”)

(define_register_constraint “j” “PIC_FN_ADDR_REG” “@internal”)

;; Don't use this constraint in gcc code! It runs the risk of ;; introducing a spill failure; see tls_get_tp_. (define_register_constraint “v” “V1_REG” “Register @code{$3}. Do not use this constraint in new code; it is retained only for compatibility with glibc.”)

(define_register_constraint “y” “GR_REGS” “Equivalent to @code{r}; retained for backwards compatibility.”)

(define_register_constraint “z” “ST_REGS” “A floating-point condition code register.”)

(define_register_constraint “A” “DSP_ACC_REGS” “@internal”)

(define_register_constraint “a” “ACC_REGS” “@internal”)

(define_register_constraint “B” “COP0_REGS” “@internal”)

(define_register_constraint “C” “COP2_REGS” “@internal”)

(define_register_constraint “D” “COP3_REGS” “@internal”)

;; Registers that can be used as the target of multiply-accumulate ;; instructions. The core MIPS32 ISA provides a hi/lo madd, ;; but the DSP version allows any accumulator target. (define_register_constraint “ka” “ISA_HAS_DSP_MULT ? ACC_REGS : MD_REGS”)

(define_register_constraint “kb” “M16_STORE_REGS” “@internal”)

(define_constraint “kf” “@internal” (match_operand 0 “force_to_mem_operand”))

;; This is a normal rather than a register constraint because we can ;; never use the stack pointer as a reload register. (define_constraint “ks” “@internal” (and (match_code “reg”) (match_test “REGNO (op) == STACK_POINTER_REGNUM”)))

;; Integer constraints

(define_constraint “I” “A signed 16-bit constant (for arithmetic instructions).” (and (match_code “const_int”) (match_test “SMALL_OPERAND (ival)”)))

(define_constraint “J” “Integer zero.” (and (match_code “const_int”) (match_test “ival == 0”)))

(define_constraint “K” “An unsigned 16-bit constant (for logic instructions).” (and (match_code “const_int”) (match_test “SMALL_OPERAND_UNSIGNED (ival)”)))

(define_constraint “L” “A signed 32-bit constant in which the lower 16 bits are zero. Such constants can be loaded using @code{lui}.” (and (match_code “const_int”) (match_test “LUI_OPERAND (ival)”)))

(define_constraint “M” “A constant that cannot be loaded using @code{lui}, @code{addiu} or @code{ori}.” (and (match_code “const_int”) (not (match_test “SMALL_OPERAND (ival)”)) (not (match_test “SMALL_OPERAND_UNSIGNED (ival)”)) (not (match_test “LUI_OPERAND (ival)”))))

(define_constraint “N” “A constant in the range -65535 to -1 (inclusive).” (and (match_code “const_int”) (match_test “ival >= -0xffff && ival < 0”)))

(define_constraint “O” “A signed 15-bit constant.” (and (match_code “const_int”) (match_test “ival >= -0x4000 && ival < 0x4000”)))

(define_constraint “P” “A constant in the range 1 to 65535 (inclusive).” (and (match_code “const_int”) (match_test “ival > 0 && ival < 0x10000”)))

;; Floating-point constraints

(define_constraint “G” “Floating-point zero.” (and (match_code “const_double”) (match_test “op == CONST0_RTX (mode)”)))

;; General constraints

(define_constraint “Q” “@internal” (match_operand 0 “const_arith_operand”))

(define_memory_constraint “R” “An address that can be used in a non-macro load or store.” (and (match_code “mem”) (match_test “mips_address_insns (XEXP (op, 0), mode, false) == 1”)))

(define_constraint “S” “@internal A constant call address.” (and (match_operand 0 “call_insn_operand”) (match_test “CONSTANT_P (op)”)))

(define_constraint “Udb7” “@internal A decremented unsigned constant of 7 bits.” (match_operand 0 “db7_operand”))

(define_constraint “Udb8” “@internal A decremented unsigned constant of 8 bits.” (match_operand 0 “db8_operand”))

(define_constraint “Uead” “@internal A microMIPS encoded ADDIUR2 immediate operand.” (match_operand 0 “addiur2_operand”))

(define_constraint “Uean” “@internal A microMIPS encoded ANDI operand.” (match_operand 0 “andi16_operand”))

(define_constraint “Uesp” “@internal A microMIPS encoded ADDIUSP operand.” (match_operand 0 “addiusp_operand”))

(define_constraint “Uib3” “@internal An unsigned, incremented constant of 3 bits.” (match_operand 0 “ib3_operand”))

(define_constraint “Usb4” “@internal A signed constant of 4 bits.” (match_operand 0 “sb4_operand”))

(define_constraint “Usb5” “@internal A signed constant of 5 bits.” (match_operand 0 “sb5_operand”))

(define_constraint “Usb8” “@internal A signed constant of 8 bits.” (match_operand 0 “sb8_operand”))

(define_constraint “Usd8” “@internal A signed constant of 8 bits, shifted left three places.” (match_operand 0 “sd8_operand”))

(define_constraint “Uub8” “@internal An unsigned constant of 8 bits.” (match_operand 0 “ub8_operand”))

(define_constraint “Uuw5” “@internal An unsigned constant of 5 bits, shifted left two places.” (match_operand 0 “uw5_operand”))

(define_constraint “Uuw6” “@internal An unsigned constant of 6 bits, shifted left two places.” (match_operand 0 “uw6_operand”))

(define_constraint “Uuw8” “@internal An unsigned constant of 8 bits, shifted left two places.” (match_operand 0 “uw8_operand”))

(define_memory_constraint “W” “@internal A memory address based on a member of @code{BASE_REG_CLASS}. This is true for all non-mips16 references (although it can sometimes be implicit if @samp{!TARGET_EXPLICIT_RELOCS}). For MIPS16, it excludes stack and constant-pool references.” (and (match_code “mem”) (match_operand 0 “memory_operand”) (ior (not (match_test “TARGET_MIPS16”)) (and (not (match_operand 0 “stack_operand”)) (not (match_test “CONSTANT_P (XEXP (op, 0))”))))))

(define_constraint “YG” “@internal A vector zero.” (and (match_code “const_vector”) (match_test “op == CONST0_RTX (mode)”)))

(define_constraint “YA” “@internal An unsigned 6-bit constant.” (and (match_code “const_int”) (match_test “UIMM6_OPERAND (ival)”)))

(define_constraint “YB” “@internal A signed 10-bit constant.” (and (match_code “const_int”) (match_test “IMM10_OPERAND (ival)”)))

(define_constraint “Yb” “@internal” (match_operand 0 “qi_mask_operand”))

(define_constraint “Yd” “@internal A constant @code{move_operand} that can be safely loaded into @code{$25} using @code{la}.” (and (match_operand 0 “move_operand”) (match_test “CONSTANT_P (op)”) (not (match_test “mips_dangerous_for_la25_p (op)”))))

(define_constraint “Yf” “@internal A constant @code{move_operand} that cannot be safely loaded into @code{$25} using @code{la}.” (and (match_operand 0 “move_operand”) (match_test “CONSTANT_P (op)”) (match_test “mips_dangerous_for_la25_p (op)”)))

(define_constraint “Yh” “@internal” (match_operand 0 “hi_mask_operand”))

(define_constraint “Yw” “@internal” (match_operand 0 “si_mask_operand”))

(define_constraint “Yx” “@internal” (match_operand 0 “low_bitmask_operand”))

(define_constraint “YI” “@internal A replicated vector const in which the replicated value is in the range [-512,511].” (and (match_code “const_vector”) (match_test “mips_const_vector_same_int_p (op, mode, -512, 511)”)))

(define_constraint “YC” “@internal A replicated vector const in which the replicated value has a single bit set.” (and (match_code “const_vector”) (match_test “mips_const_vector_bitimm_set_p (op, mode)”)))

(define_constraint “YZ” “@internal A replicated vector const in which the replicated value has a single bit clear.” (and (match_code “const_vector”) (match_test “mips_const_vector_bitimm_clr_p (op, mode)”)))

(define_constraint “Unv5” “@internal A replicated vector const in which the replicated value is in the range [-31,0].” (and (match_code “const_vector”) (match_test “mips_const_vector_same_int_p (op, mode, -31, 0)”)))

(define_constraint “Uuv5” “@internal A replicated vector const in which the replicated value is in the range [0,31].” (and (match_code “const_vector”) (match_test “mips_const_vector_same_int_p (op, mode, 0, 31)”)))

(define_constraint “Usv5” “@internal A replicated vector const in which the replicated value is in the range [-16,15].” (and (match_code “const_vector”) (match_test “mips_const_vector_same_int_p (op, mode, -16, 15)”)))

(define_constraint “Uuv6” “@internal A replicated vector const in which the replicated value is in the range [0,63].” (and (match_code “const_vector”) (match_test “mips_const_vector_same_int_p (op, mode, 0, 63)”)))

(define_constraint “Urv8” “@internal A replicated vector const with replicated byte values as well as elements” (and (match_code “const_vector”) (match_test “mips_const_vector_same_bytes_p (op, mode)”)))

(define_memory_constraint “ZC” “A memory operand whose address is formed by a base register and offset that is suitable for use in instructions with the same addressing mode as @code{ll} and @code{sc}.” (and (match_code “mem”) (if_then_else (match_test “TARGET_MICROMIPS”) (match_test “umips_12bit_offset_address_p (XEXP (op, 0), mode)”) (if_then_else (match_test “ISA_HAS_9BIT_DISPLACEMENT”) (match_test “mips_9bit_offset_address_p (XEXP (op, 0), mode)”) (match_test “mips_address_insns (XEXP (op, 0), mode, false)”)))))

(define_address_constraint “ZD” “An address suitable for a @code{prefetch} instruction, or for any other instruction with the same addressing mode as @code{prefetch}.” (if_then_else (match_test “TARGET_MICROMIPS”) (match_test “umips_12bit_offset_address_p (op, mode)”) (if_then_else (match_test “ISA_HAS_9BIT_DISPLACEMENT”) (match_test “mips_9bit_offset_address_p (op, mode)”) (match_test “mips_address_insns (op, mode, false)”))))

(define_memory_constraint “ZR” “@internal An address valid for loading/storing register exclusive” (match_operand 0 “mem_noofs_operand”))

(define_memory_constraint “ZS” “@internal A microMIPS memory operand for use with the LWSP/SWSP insns.” (and (match_code “mem”) (match_operand 0 “lwsp_swsp_operand”)))

(define_memory_constraint “ZT” “@internal A microMIPS memory operand for use with the LW16/SW16 insns.” (and (match_code “mem”) (match_operand 0 “lw16_sw16_operand”)))

(define_memory_constraint “ZU” “@internal A microMIPS memory operand for use with the LHU16/SH16 insns.” (and (match_code “mem”) (match_operand 0 “lhu16_sh16_operand”)))

(define_memory_constraint “ZV” “@internal A microMIPS memory operand for use with the SB16 insn.” (and (match_code “mem”) (match_operand 0 “sb16_operand”)))

(define_memory_constraint “ZW” “@internal A microMIPS memory operand for use with the LBU16 insn.” (and (match_code “mem”) (match_operand 0 “lbu16_operand”)))