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-/* Definitions for condition code handling in final.c and output routines.
- Copyright (C) 1987 Free Software Foundation, Inc.
-
-This file is part of GNU CC.
-
-GNU CC 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 2, or (at your option)
-any later version.
-
-GNU CC 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 GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
-
-/* None of the things in the files exist if we don't use CC0. */
-
-#ifdef HAVE_cc0
-
-/* The variable cc_status says how to interpret the condition code.
- It is set by output routines for an instruction that sets the cc's
- and examined by output routines for jump instructions.
-
- cc_status contains two components named `value1' and `value2'
- that record two equivalent expressions for the values that the
- condition codes were set from. (Either or both may be null if
- there is no useful expression to record.) These fields are
- used for eliminating redundant test and compare instructions
- in the cases where the condition codes were already set by the
- previous instruction.
-
- cc_status.flags contains flags which say that the condition codes
- were set in a nonstandard manner. The output of jump instructions
- uses these flags to compensate and produce the standard result
- with the nonstandard condition codes. Standard flags are defined here.
- The tm.h file can also define other machine-dependent flags.
-
- cc_status also contains a machine-dependent component `mdep'
- whose type, `CC_STATUS_MDEP', may be defined as a macro in the
- tm.h file. */
-
-#ifndef CC_STATUS_MDEP
-#define CC_STATUS_MDEP int
-#endif
-
-#ifndef CC_STATUS_MDEP_INIT
-#define CC_STATUS_MDEP_INIT 0
-#endif
-
-typedef struct {int flags; rtx value1, value2; CC_STATUS_MDEP mdep;} CC_STATUS;
-
-/* While outputting an insn as assembler code,
- this is the status BEFORE that insn. */
-extern CC_STATUS cc_prev_status;
-
-/* While outputting an insn as assembler code,
- this is being altered to the status AFTER that insn. */
-extern CC_STATUS cc_status;
-
-/* These are the machine-independent flags: */
-
-/* Set if the sign of the cc value is inverted:
- output a following jump-if-less as a jump-if-greater, etc. */
-#define CC_REVERSED 1
-
-/* This bit means that the current setting of the N bit is bogus
- and conditional jumps should use the Z bit in its place.
- This state obtains when an extraction of a signed single-bit field
- or an arithmetic shift right of a byte by 7 bits
- is turned into a btst, because btst does not set the N bit. */
-#define CC_NOT_POSITIVE 2
-
-/* This bit means that the current setting of the N bit is bogus
- and conditional jumps should pretend that the N bit is clear.
- Used after extraction of an unsigned bit
- or logical shift right of a byte by 7 bits is turned into a btst.
- The btst does not alter the N bit, but the result of that shift
- or extract is never negative. */
-#define CC_NOT_NEGATIVE 4
-
-/* This bit means that the current setting of the overflow flag
- is bogus and conditional jumps should pretend there is no overflow. */
-/* ??? Note that for most targets this macro is misnamed as it applies
- to the carry flag, not the overflow flag. */
-#define CC_NO_OVERFLOW 010
-
-/* This bit means that what ought to be in the Z bit
- should be tested as the complement of the N bit. */
-#define CC_Z_IN_NOT_N 020
-
-/* This bit means that what ought to be in the Z bit
- should be tested as the N bit. */
-#define CC_Z_IN_N 040
-
-/* Nonzero if we must invert the sense of the following branch, i.e.
- change EQ to NE. This is not safe for IEEE floating point operations!
- It is intended for use only when a combination of arithmetic
- or logical insns can leave the condition codes set in a fortuitous
- (though inverted) state. */
-#define CC_INVERTED 0100
-
-/* Nonzero if we must convert signed condition operators to unsigned.
- This is only used by machine description files. */
-#define CC_NOT_SIGNED 0200
-
-/* This is how to initialize the variable cc_status.
- final does this at appropriate moments. */
-
-#define CC_STATUS_INIT \
- (cc_status.flags = 0, cc_status.value1 = 0, cc_status.value2 = 0, \
- CC_STATUS_MDEP_INIT)
-
-#endif