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125 lines
4 KiB
C
125 lines
4 KiB
C
/* Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.
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Copyright (c) 2020, MariaDB Corporation.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
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/*
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Optimized function-like macros for the x86 architecture (_WIN32 included).
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*/
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#define sint2korr(A) (int16) (*((int16 *) (A)))
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#define sint3korr(A) ((int32) ((((uchar) (A)[2]) & 128) ? \
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(((uint32) 255L << 24) | \
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(((uint32) (uchar) (A)[2]) << 16) |\
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(((uint32) (uchar) (A)[1]) << 8) | \
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((uint32) (uchar) (A)[0])) : \
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(((uint32) (uchar) (A)[2]) << 16) |\
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(((uint32) (uchar) (A)[1]) << 8) | \
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((uint32) (uchar) (A)[0])))
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#define sint4korr(A) (int32) (*((int32 *) (A)))
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#define uint2korr(A) (uint16) (*((uint16 *) (A)))
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#define uint3korr(A) (uint32) (((uint32) ((uchar) (A)[0])) |\
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(((uint32) ((uchar) (A)[1])) << 8) |\
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(((uint32) ((uchar) (A)[2])) << 16))
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#define uint4korr(A) (uint32) (*((uint32 *) (A)))
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static inline ulonglong uint5korr(const void *p)
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{
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ulonglong a= *(uint32 *) p;
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ulonglong b= *(4 + (uchar *) p);
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return a | (b << 32);
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}
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static inline ulonglong uint6korr(const void *p)
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{
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ulonglong a= *(uint32 *) p;
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ulonglong b= *(uint16 *) (4 + (char *) p);
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return a | (b << 32);
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}
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#define uint8korr(A) (ulonglong) (*((ulonglong *) (A)))
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#define sint8korr(A) (longlong) (*((longlong *) (A)))
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#define int2store(T,A) do { uchar *pT= (uchar*)(T);\
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*((uint16*)(pT))= (uint16) (A);\
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} while (0)
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#define int3store(T,A) do { *(T)= (uchar) ((A));\
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*(T+1)=(uchar) (((uint) (A) >> 8));\
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*(T+2)=(uchar) (((A) >> 16));\
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} while (0)
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#define int4store(T,A) do { uchar *pT= (uchar*)(T);\
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*((uint32 *) (pT))= (uint32) (A); \
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} while (0)
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#define int5store(T,A) do { uchar *pT= (uchar*)(T);\
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*((uint32 *) (pT))= (uint32) (A); \
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*((pT)+4)=(uchar) (((A) >> 32));\
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} while (0)
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#define int6store(T,A) do { uchar *pT= (uchar*)(T);\
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*((uint32 *) (pT))= (uint32) (A); \
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*((uint16*)(pT+4))= (uint16) (A >> 32);\
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} while (0)
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#define int8store(T,A) do { uchar *pT= (uchar*)(T);\
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*((ulonglong *) (pT))= (ulonglong) (A);\
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} while(0)
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#if defined(__GNUC__)
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#define HAVE_mi_uint5korr
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#define HAVE_mi_uint6korr
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#define HAVE_mi_uint7korr
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#define HAVE_mi_uint8korr
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/* Read numbers stored in high-bytes-first order */
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static inline ulonglong mi_uint5korr(const void *p)
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{
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ulonglong a= *(uint32 *) p;
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ulonglong b= *(4 + (uchar *) p);
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ulonglong v= (a | (b << 32)) << 24;
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asm ("bswapq %0" : "=r" (v) : "0" (v));
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return v;
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}
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static inline ulonglong mi_uint6korr(const void *p)
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{
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ulonglong a= *(uint32 *) p;
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ulonglong b= *(uint16 *) (4 + (char *) p);
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ulonglong v= (a | (b << 32)) << 16;
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asm ("bswapq %0" : "=r" (v) : "0" (v));
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return v;
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}
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static inline ulonglong mi_uint7korr(const void *p)
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{
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ulonglong a= *(uint32 *) p;
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ulonglong b= *(uint16 *) (4 + (char *) p);
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ulonglong c= *(6 + (uchar *) p);
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ulonglong v= (a | (b << 32) | (c << 48)) << 8;
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asm ("bswapq %0" : "=r" (v) : "0" (v));
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return v;
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}
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static inline ulonglong mi_uint8korr(const void *p)
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{
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ulonglong v= *(ulonglong *) p;
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asm ("bswapq %0" : "=r" (v) : "0" (v));
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return v;
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}
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#endif
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