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Merged
pixclk merged 1 commit into from
Jan 12, 2025
Merged

feat dword: prioritize using the compiler for computation #650

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32 changes: 32 additions & 0 deletions arch/generic/include/bfdev/asm/dword.h
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Original file line number Diff line number Diff line change
@@ -0,0 +1,32 @@
/* SPDX-License-Identifier: LGPL-3.0-or-later */
/*
* Copyright(c) 2024 John Sanpe <sanpeqf@gmail.com>
*/

#ifndef _BFDEV_ASM_DWORD_H_
#define _BFDEV_ASM_DWORD_H_

#include <bfdev/config.h>
#include <bfdev/asm/bitsperlong.h>

BFDEV_BEGIN_DECLS

#if BFDEV_BITS_PER_LONG == 32
# define __BFDEV_ASM_HAVE_DWORD 1
#else /* BFDEV_BITS_PER_LONG == 64 */
# define __BFDEV_ASM_HAVE_DWORD __SIZEOF_INT128__
#endif

#ifndef BFDEV_ASM_HAVE_DWORD
# define BFDEV_ASM_HAVE_DWORD __BFDEV_ASM_HAVE_DWORD
#endif

BFDEV_END_DECLS

#ifdef BFDEV_ASM_HAVE_DWORD
# include <bfdev/asm-generic/dword-compiler.h>
#endif

#include <bfdev/asm-generic/dword.h>

#endif /* _BFDEV_ASM_DWORD_H_ */
86 changes: 86 additions & 0 deletions include/bfdev/asm-generic/dword-compiler.h
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/* SPDX-License-Identifier: LGPL-3.0-or-later */
/*
* Copyright(c) 2025 John Sanpe <sanpeqf@gmail.com>
*/

#ifndef _BFDEV_ASM_GENERIC_DWORD_H_
#define _BFDEV_ASM_GENERIC_DWORD_H_

#include <bfdev/config.h>
#include <bfdev/types.h>
#include <bfdev/stddef.h>
#include <bfdev/bits.h>

BFDEV_BEGIN_DECLS

#if BFDEV_BITS_PER_LONG == 32
typedef uint64_t bfdev_dword_t;
#else
typedef unsigned __int128 bfdev_dword_t;
#endif

#ifndef bfdev_dword_addd
# define bfdev_dword_addd bfdev_dword_addd
static __bfdev_always_inline void
bfdev_dword_addd(bfdev_uw_t *sh, bfdev_uw_t *sl, bfdev_uw_t ah,
bfdev_uw_t al, bfdev_uw_t bh, bfdev_uw_t bl)
{
bfdev_dword_t ac, bc, sc;

ac = (bfdev_dword_t)ah << BFDEV_BITS_PER_LONG | al;
bc = (bfdev_dword_t)bh << BFDEV_BITS_PER_LONG | bl;

sc = ac + bc;
*sh = (bfdev_uw_t)(sc >> BFDEV_BITS_PER_LONG);
*sl = (bfdev_uw_t)sc;
}
#endif

#ifndef bfdev_dword_sub_ddmmss
# define bfdev_dword_sub_ddmmss bfdev_dword_sub_ddmmss
static __bfdev_always_inline void
bfdev_dword_sub_ddmmss(bfdev_uw_t *sh, bfdev_uw_t *sl, bfdev_uw_t ah,
bfdev_uw_t al, bfdev_uw_t bh, bfdev_uw_t bl)
{
bfdev_dword_t ac, bc, sc;

ac = (bfdev_dword_t)ah << BFDEV_BITS_PER_LONG | al;
bc = (bfdev_dword_t)bh << BFDEV_BITS_PER_LONG | bl;

sc = ac - bc;
*sh = (bfdev_uw_t)(sc >> BFDEV_BITS_PER_LONG);
*sl = (bfdev_uw_t)sc;
}
#endif

#ifndef bfdev_dword_umul_ppmm
# define bfdev_dword_umul_ppmm bfdev_dword_umul_ppmm
static __bfdev_always_inline void
bfdev_dword_umul_ppmm(bfdev_uw_t *dh, bfdev_uw_t *dl,
bfdev_uw_t va, bfdev_uw_t vb)
{
bfdev_dword_t sc;

sc = (bfdev_dword_t)va * vb;
*dh = (bfdev_uw_t)(sc >> BFDEV_BITS_PER_LONG);
*dl = (bfdev_uw_t)sc;
}
#endif

#ifndef bfdev_dword_udiv_qrnnd
# define bfdev_dword_udiv_qrnnd bfdev_dword_udiv_qrnnd
static __bfdev_always_inline void
bfdev_dword_udiv_qrnnd(bfdev_uw_t *quot, bfdev_uw_t *rem, bfdev_uw_t vh,
bfdev_uw_t vl, bfdev_uw_t div)
{
bfdev_dword_t vc;

vc = (bfdev_dword_t)vh << BFDEV_BITS_PER_LONG | vl;
*quot = (bfdev_uw_t)(vc / div);
*rem = (bfdev_uw_t)(vc % div);
}
#endif

BFDEV_END_DECLS

#endif /* _BFDEV_ASM_GENERIC_DWORD_H_ */
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