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/*
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* Copyright (c) 2014, Red Hat Inc. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef _IMMEDIATE_H
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#define _IMMEDIATE_H
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#include <sys/types.h>
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/*
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* functions to map backwards and forwards between logical or floating
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* point immediates and their corresponding encodings. the mapping
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* from encoding to immediate is required by the simulator. the reverse
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* mapping is required by the OpenJDK assembler.
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*
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* a logical immediate value supplied to or returned from a map lookup
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* is always 64 bits. this is sufficient for looking up 32 bit
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* immediates or their encodings since a 32 bit immediate has the same
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* encoding as the 64 bit immediate produced by concatenating the
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* immediate with itself.
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*
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* a logical immediate encoding is 13 bits N:immr:imms (3 fields of
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* widths 1:6:6 -- see the arm spec). they appear as bits [22:10] of a
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* logical immediate instruction. encodings are supplied and returned
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* as 32 bit values. if a given 13 bit immediate has no corresponding
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* encoding then a map lookup will return 0xffffffff.
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*/
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u_int64_t logical_immediate_for_encoding(u_int32_t encoding);
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u_int32_t encoding_for_logical_immediate(u_int64_t immediate);
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u_int64_t fp_immediate_for_encoding(u_int32_t imm8, int is_dp);
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u_int32_t encoding_for_fp_immediate(float immediate);
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#endif // _IMMEDIATE_H
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