Subversion Repositories openrisc_2011-10-31

;; Constraint definitions for SPU

;; Copyright (C) 2006, 2007 Free Software Foundation, Inc.

;;

;; This file 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 of the License, or (at your option)

;; any later version.

;; This file 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

;; .

;;       ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz

;; GCC:      ffffiiiiiiii     x x        x x   xxxx xx

;; SPU:  xxxx    xxx xxxx xxxx x xxx xx x   xxx         xx

;; FREE:     ffff   i    a          a  a  a        a  aa  aaa

;; x - used

;; a - available

;; i - available for integer immediates

;; f - available for floating point immediates

;; For most immediate constraints we have 3 variations to deal with the

;; fact const_int has no mode.  One variation treats const_int as 32 bit,

;; another treats it as 64 bit, and the third sign extends it to 128 bit.

(define_constraint "A"

  "An immediate which can be loaded with the il/ila/ilh/ilhu instructions.  const_int is treated as a 32-bit value."

  (ior (and (match_code "const_int,const_double,const_vector")

            (match_test "immediate_load_p (op, SImode)"))

       (match_code "symbol_ref,label_ref,high,const")))

(define_constraint "B"

  "An immediate for arithmetic instructions (e.g., ai, ceqi).  const_int is treated as a 32-bit value."

  (and (match_code "const_int,const_double,const_vector")

       (match_test "arith_immediate_p (op, SImode, -0x200, 0x1ff)")))

(define_constraint "C"

  "An immediate for and/xor/or instructions.  const_int is treated as a 32-bit value."

  (and (match_code "const_int,const_double,const_vector")

       (match_test "logical_immediate_p (op, SImode)")))

(define_constraint "D"

  "An immediate for iohl instruction.  const_int is treated as a 32-bit value."

  (and (match_code "const_int,const_double,const_vector")

       (match_test "iohl_immediate_p (op, SImode)")))

(define_constraint "U"

  "An immediate which can be loaded with the il/ila/ilh/ilhu instructions.  const_int is sign extended to 128 bit."

  (and (match_code "const_int,const_double,const_vector")

       (match_test "immediate_load_p (op, TImode)")))

(define_constraint "W"

  "An immediate for shift and rotate instructions.  const_int is treated as a 32-bit value."

  (and (match_code "const_int,const_double,const_vector")

       (match_test "arith_immediate_p (op, SImode, -0x80000000ll, 0x7fffffffll)")))

(define_constraint "Y"

  "An immediate for and/xor/or instructions.  const_int is sign extended as a 128 bit."

  (and (match_code "const_int,const_double,const_vector")

       (match_test "logical_immediate_p (op, TImode)")))

(define_constraint "Z"

  "An immediate for iohl instruction.  const_int is sign extended to 128 bit."

  (and (match_code "const_int,const_double,const_vector")

       (match_test "iohl_immediate_p (op, TImode)")))

(define_constraint "a"

  "An immediate which can be loaded with the il/ila/ilh/ilhu instructions.  const_int is treated as a 64-bit value."

  (and (match_code "const_int")

       (match_test "immediate_load_p (op, DImode)")))

(define_constraint "c"

  "An immediate for and/xor/or instructions.  const_int is treated as a 64-bit value."

  (and (match_code "const_int")

       (match_test "logical_immediate_p (op, DImode)")))

(define_constraint "d"

  "An immediate for iohl instruction.  const_int is treated as a 64-bit value."

  (and (match_code "const_int")

       (match_test "iohl_immediate_p (op, DImode)")))

(define_constraint "f"

  "An immediate which can be loaded with fsmbi."

  (and (match_code "const_int,const_double,const_vector")

       (match_test "fsmbi_const_p (op)")))

(define_constraint "j"

  "An immediate which can be loaded with one of the cbd/chd/cwd/cdd instructions.  const_int is treated as a 32-bit value."

  (and (match_code "const_int,const_double,const_vector")

       (match_test "cpat_const_p (op, SImode)")))

(define_constraint "k"

  "An immediate which can be loaded with one of the cbd/chd/cwd/cdd instructions.  const_int is treated as a 64-bit value."

  (and (match_code "const_int,const_double,const_vector")

       (match_test "cpat_const_p (op, DImode)")))

(define_constraint "l"

  "An immediate which can be loaded with one of the cbd/chd/cwd/cdd instructions."

  (and (match_code "const_double,const_vector")

       (match_test "cpat_const_p (op, TImode)")))

;; Integer constraints

(define_constraint "I"

  "A constant in the range [-64, 63] for shift/rotate instructions."

  (and (match_code "const_int")

       (match_test "ival >= -0x40 && ival <= 0x3f")))

(define_constraint "J"

  "An unsigned 7-bit constant for conversion/nop/channel instructions."

  (and (match_code "const_int")

       (match_test "ival >= 0 && ival <= 0x7f")))

(define_constraint "K"

  "A signed 10-bit constant for most arithmetic instructions."

  (and (match_code "const_int")

       (match_test "ival >= -0x200 && ival <= 0x1ff")))

(define_constraint "M"

  "A signed 16-bit immediate for @code{stop}."

  (and (match_code "const_int")

       (match_test "ival >= -0x8000ll && ival <= 0x7fffll")))

(define_constraint "N"

  "An unsigned 16-bit constant for @code{iohl} and @code{fsmbi}."

  (and (match_code "const_int")

       (match_test "ival >= 0 && ival <= 0xffff")))

(define_constraint "O"

  "An unsigned 7-bit constant whose 3 least significant bits are 0."

  (and (match_code "const_int")

       (match_test "(ival & 7) == 0")))

(define_constraint "P"

  "An unsigned 3-bit constant for 16-byte rotates and shifts"

  (and (match_code "const_int")

       (match_test "ival >= 0 && ival <= 7")))

;; Memory constraints

(define_memory_constraint "R"

  "Call operand, reg, for indirect calls"

  (and (match_code "mem")

       (match_test "GET_CODE(XEXP(op, 0)) == REG")))

(define_memory_constraint "S"

  "Call operand, symbol, for relative calls."

  (and (match_code "mem")

       (match_test "!TARGET_LARGE_MEM

                    && ((GET_CODE (XEXP (op, 0)) == SYMBOL_REF

                         || GET_CODE (XEXP (op, 0)) == LABEL_REF))")))

(define_memory_constraint "T"

  "Call operand, const_int, for absolute calls."

  (and (match_code "mem")

       (match_test "GET_CODE (XEXP (op, 0)) == CONST_INT

                    && INTVAL (XEXP (op, 0)) >= 0

                    && INTVAL (XEXP (op, 0)) <= 0x3ffff")))

;; Floating-point constant constraints.

(define_constraint "v"

  "Floating point power of 2 with exponent in [0..127]"

  (and (match_code "const_double,const_vector")

       (match_test "exp2_immediate_p (op, VOIDmode, 0, 127)")))

(define_constraint "w"

  "Floating point power of 2 with exponent in [-126..0]"

  (and (match_code "const_double,const_vector")

       (match_test "exp2_immediate_p (op, VOIDmode, -126, 0)")))