1169689Skan;; Constraint definitions for IA-32 and x86-64. 2169689Skan;; Copyright (C) 2006 Free Software Foundation, Inc. 3169689Skan;; 4169689Skan;; This file is part of GCC. 5169689Skan;; 6169689Skan;; GCC is free software; you can redistribute it and/or modify 7169689Skan;; it under the terms of the GNU General Public License as published by 8169689Skan;; the Free Software Foundation; either version 2, or (at your option) 9169689Skan;; any later version. 10169689Skan;; 11169689Skan;; GCC is distributed in the hope that it will be useful, 12169689Skan;; but WITHOUT ANY WARRANTY; without even the implied warranty of 13169689Skan;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14169689Skan;; GNU General Public License for more details. 15169689Skan;; 16169689Skan;; You should have received a copy of the GNU General Public License 17169689Skan;; along with GCC; see the file COPYING. If not, write to 18169689Skan;; the Free Software Foundation, 51 Franklin Street, Fifth Floor, 19169689Skan;; Boston, MA 02110-1301, USA. 20169689Skan 21169689Skan;;; Unused letters: 22169689Skan;;; B H TU W 23169689Skan;;; h jk vw z 24169689Skan 25169689Skan;; Integer register constraints. 26169689Skan;; It is not necessary to define 'r' here. 27169689Skan(define_register_constraint "R" "LEGACY_REGS" 28169689Skan "Legacy register---the eight integer registers available on all 29169689Skan i386 processors (@code{a}, @code{b}, @code{c}, @code{d}, 30169689Skan @code{si}, @code{di}, @code{bp}, @code{sp}).") 31169689Skan 32169689Skan(define_register_constraint "q" "TARGET_64BIT ? GENERAL_REGS : Q_REGS" 33169689Skan "Any register accessible as @code{@var{r}l}. In 32-bit mode, @code{a}, 34169689Skan @code{b}, @code{c}, and @code{d}; in 64-bit mode, any integer register.") 35169689Skan 36169689Skan(define_register_constraint "Q" "Q_REGS" 37169689Skan "Any register accessible as @code{@var{r}h}: @code{a}, @code{b}, 38169689Skan @code{c}, and @code{d}.") 39169689Skan 40169689Skan(define_register_constraint "l" "INDEX_REGS" 41169689Skan "@internal Any register that can be used as the index in a base+index 42169689Skan memory access: that is, any general register except the stack pointer.") 43169689Skan 44169689Skan(define_register_constraint "a" "AREG" 45169689Skan "The @code{a} register.") 46169689Skan 47169689Skan(define_register_constraint "b" "BREG" 48169689Skan "The @code{b} register.") 49169689Skan 50169689Skan(define_register_constraint "c" "CREG" 51169689Skan "The @code{c} register.") 52169689Skan 53169689Skan(define_register_constraint "d" "DREG" 54169689Skan "The @code{d} register.") 55169689Skan 56169689Skan(define_register_constraint "S" "SIREG" 57169689Skan "The @code{si} register.") 58169689Skan 59169689Skan(define_register_constraint "D" "DIREG" 60169689Skan "The @code{di} register.") 61169689Skan 62169689Skan(define_register_constraint "A" "AD_REGS" 63169689Skan "The @code{a} and @code{d} registers, as a pair (for instructions 64169689Skan that return half the result in one and half in the other).") 65169689Skan 66169689Skan;; Floating-point register constraints. 67169689Skan(define_register_constraint "f" 68169689Skan "TARGET_80387 || TARGET_FLOAT_RETURNS_IN_80387 ? FLOAT_REGS : NO_REGS" 69169689Skan "Any 80387 floating-point (stack) register.") 70169689Skan 71169689Skan(define_register_constraint "t" 72169689Skan "TARGET_80387 || TARGET_FLOAT_RETURNS_IN_80387 ? FP_TOP_REG : NO_REGS" 73169689Skan "Top of 80387 floating-point stack (@code{%st(0)}).") 74169689Skan 75169689Skan(define_register_constraint "u" 76169689Skan "TARGET_80387 || TARGET_FLOAT_RETURNS_IN_80387 ? FP_SECOND_REG : NO_REGS" 77169689Skan "Second from top of 80387 floating-point stack (@code{%st(1)}).") 78169689Skan 79169689Skan;; Vector registers (also used for plain floating point nowadays). 80169689Skan(define_register_constraint "y" "TARGET_MMX ? MMX_REGS : NO_REGS" 81169689Skan "Any MMX register.") 82169689Skan 83169689Skan(define_register_constraint "x" "TARGET_SSE ? SSE_REGS : NO_REGS" 84169689Skan "Any SSE register.") 85169689Skan 86169689Skan(define_register_constraint "Y" "TARGET_SSE2? SSE_REGS : NO_REGS" 87169689Skan "@internal Any SSE2 register.") 88169689Skan 89169689Skan;; Integer constant constraints. 90169689Skan(define_constraint "I" 91169689Skan "Integer constant in the range 0 @dots{} 31, for 32-bit shifts." 92169689Skan (and (match_code "const_int") 93169689Skan (match_test "ival >= 0 && ival <= 31"))) 94169689Skan 95169689Skan(define_constraint "J" 96169689Skan "Integer constant in the range 0 @dots{} 63, for 64-bit shifts." 97169689Skan (and (match_code "const_int") 98169689Skan (match_test "ival >= 0 && ival <= 63"))) 99169689Skan 100169689Skan(define_constraint "K" 101169689Skan "Signed 8-bit integer constant." 102169689Skan (and (match_code "const_int") 103169689Skan (match_test "ival >= -128 && ival <= 127"))) 104169689Skan 105169689Skan(define_constraint "L" 106169689Skan "@code{0xFF} or @code{0xFFFF}, for andsi as a zero-extending move." 107169689Skan (and (match_code "const_int") 108169689Skan (match_test "ival == 0xFF || ival == 0xFFFF"))) 109169689Skan 110169689Skan(define_constraint "M" 111169689Skan "0, 1, 2, or 3 (shifts for the @code{lea} instruction)." 112169689Skan (and (match_code "const_int") 113169689Skan (match_test "ival >= 0 && ival <= 3"))) 114169689Skan 115169689Skan(define_constraint "N" 116169689Skan "Unsigned 8-bit integer constant (for @code{in} and @code{out} 117169689Skan instructions)." 118169689Skan (and (match_code "const_int") 119169689Skan (match_test "ival >= 0 && ival <= 255"))) 120169689Skan 121169689Skan(define_constraint "O" 122169689Skan "@internal Integer constant in the range 0 @dots{} 127, for 128-bit shifts." 123169689Skan (and (match_code "const_int") 124169689Skan (match_test "ival >= 0 && ival <= 127"))) 125169689Skan 126169689Skan;; Floating-point constant constraints. 127169689Skan;; We allow constants even if TARGET_80387 isn't set, because the 128169689Skan;; stack register converter may need to load 0.0 into the function 129169689Skan;; value register (top of stack). 130169689Skan(define_constraint "G" 131169689Skan "Standard 80387 floating point constant." 132169689Skan (and (match_code "const_double") 133169689Skan (match_test "standard_80387_constant_p (op)"))) 134169689Skan 135169689Skan;; This can theoretically be any mode's CONST0_RTX. 136169689Skan(define_constraint "C" 137169689Skan "Standard SSE floating point constant." 138169689Skan (match_test "standard_sse_constant_p (op)")) 139169689Skan 140169689Skan;; Constant-or-symbol-reference constraints. 141169689Skan 142169689Skan(define_constraint "e" 143169689Skan "32-bit signed integer constant, or a symbolic reference known 144169689Skan to fit that range (for immediate operands in sign-extending x86-64 145169689Skan instructions)." 146169689Skan (match_operand 0 "x86_64_immediate_operand")) 147169689Skan 148169689Skan(define_constraint "Z" 149169689Skan "32-bit unsigned integer constant, or a symbolic reference known 150169689Skan to fit that range (for immediate operands in zero-extending x86-64 151169689Skan instructions)." 152169689Skan (match_operand 0 "x86_64_zext_immediate_operand")) 153