mirror of https://github.com/janet-lang/janet
68 lines
2.6 KiB
C
68 lines
2.6 KiB
C
/*
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* Copyright (c) 2018 Calvin Rose
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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/* Implements a simple first fit register allocator for the compiler. */
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#ifndef JANET_REGALLOC_H
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#define JANET_REGALLOC_H
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#include <stdint.h>
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/* Placeholder for allocating temporary registers */
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typedef enum {
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JANETC_REGTEMP_0,
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JANETC_REGTEMP_1,
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JANETC_REGTEMP_2,
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JANETC_REGTEMP_3,
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JANETC_REGTEMP_4,
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JANETC_REGTEMP_5,
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JANETC_REGTEMP_6,
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JANETC_REGTEMP_7
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} JanetcRegisterTemp;
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typedef struct {
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uint32_t *chunks;
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int32_t count; /* number of chunks in chunks */
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int32_t capacity; /* amount allocated for chunks */
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int32_t max; /* The maximum allocated register so far */
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int32_t regtemps; /* Hold which tempregistered are alloced. */
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} JanetcRegisterAllocator;
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void janetc_regalloc_init(JanetcRegisterAllocator *ra);
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void janetc_regalloc_deinit(JanetcRegisterAllocator *ra);
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int32_t janetc_regalloc_1(JanetcRegisterAllocator *ra);
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void janetc_regalloc_free(JanetcRegisterAllocator *ra, int32_t reg);
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int32_t janetc_regalloc_temp(JanetcRegisterAllocator *ra, JanetcRegisterTemp nth);
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void janetc_regalloc_freetemp(JanetcRegisterAllocator *ra, int32_t reg, JanetcRegisterTemp nth);
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void janetc_regalloc_clone(JanetcRegisterAllocator *dest, JanetcRegisterAllocator *src);
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void janetc_regalloc_touch(JanetcRegisterAllocator *ra, int32_t reg);
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/* Mutli-slot allocation disabled */
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/*
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int32_t janetc_regalloc_n(JanetcRegisterAllocator *ra, int32_t n);
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int32_t janetc_regalloc_call(JanetcRegisterAllocator *ra, int32_t callee, int32_t nargs);
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void janetc_regalloc_freerange(JanetcRegisterAllocator *ra, int32_t regstart, int32_t n);
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*/
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#endif
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