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https://github.com/netwide-assembler/nasm.git
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903ea54857
Make the RAA infrastructure a bit cleaner, make it support 64-bit indicies, and reduce the memory overhead of a sparse or small RAA -- the old code would allocate a *minimum* of 256K for each RAA. The new code reduces that to 16K, and will not mandatorily allocate an entry in the zero position. The new shift, 11, was chosen so that a 32-bit RAA value will need 3 layers and a 64-bit value 6 layers, without excessive waste. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
50 lines
2.1 KiB
C
50 lines
2.1 KiB
C
/* ----------------------------------------------------------------------- *
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*
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* Copyright 1996-2009 The NASM Authors - All Rights Reserved
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* See the file AUTHORS included with the NASM distribution for
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* the specific copyright holders.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following
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* conditions are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* ----------------------------------------------------------------------- */
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#ifndef NASM_RAA_H
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#define NASM_RAA_H 1
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#include "compiler.h"
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struct RAA;
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typedef uint64_t raaindex;
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#define raa_init() NULL
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void raa_free(struct RAA *);
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int64_t raa_read(struct RAA *, raaindex);
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void *raa_read_ptr(struct RAA *, raaindex);
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struct RAA * never_null raa_write(struct RAA *r, raaindex posn, int64_t value);
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struct RAA * never_null raa_write_ptr(struct RAA *r, raaindex posn, void *value);
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#endif /* NASM_RAA_H */
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