/* * Copyright (C) 2012 Michael Brown . * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of the * License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA * 02110-1301, USA. * * You can also choose to distribute this program under the terms of * the Unmodified Binary Distribution Licence (as given in the file * COPYING.UBDL), provided that you have satisfied its requirements. */ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); /** @file * * memcpy() self-tests * */ /* Forcibly enable assertions */ #undef NDEBUG #include #include #include #include #include /** Number of sample iterations for profiling */ #define PROFILE_COUNT 16 /* Provide global functions to allow inspection of generated code */ void memcpy_0 ( void *dest, void *src ) { memcpy ( dest, src, 0 ); } void memcpy_1 ( void *dest, void *src ) { memcpy ( dest, src, 1 ); } void memcpy_2 ( void *dest, void *src ) { memcpy ( dest, src, 2 ); } void memcpy_3 ( void *dest, void *src ) { memcpy ( dest, src, 3 ); } void memcpy_4 ( void *dest, void *src ) { memcpy ( dest, src, 4 ); } void memcpy_5 ( void *dest, void *src ) { memcpy ( dest, src, 5 ); } void memcpy_6 ( void *dest, void *src ) { memcpy ( dest, src, 6 ); } void memcpy_7 ( void *dest, void *src ) { memcpy ( dest, src, 7 ); } void memcpy_8 ( void *dest, void *src ) { memcpy ( dest, src, 8 ); } void memcpy_9 ( void *dest, void *src ) { memcpy ( dest, src, 9 ); } void memcpy_10 ( void *dest, void *src ) { memcpy ( dest, src, 10 ); } void memcpy_11 ( void *dest, void *src ) { memcpy ( dest, src, 11 ); } void memcpy_12 ( void *dest, void *src ) { memcpy ( dest, src, 12 ); } void memcpy_13 ( void *dest, void *src ) { memcpy ( dest, src, 13 ); } void memcpy_14 ( void *dest, void *src ) { memcpy ( dest, src, 14 ); } void memcpy_15 ( void *dest, void *src ) { memcpy ( dest, src, 15 ); } void memcpy_16 ( void *dest, void *src ) { memcpy ( dest, src, 16 ); } void memcpy_17 ( void *dest, void *src ) { memcpy ( dest, src, 17 ); } void memcpy_18 ( void *dest, void *src ) { memcpy ( dest, src, 18 ); } void memcpy_19 ( void *dest, void *src ) { memcpy ( dest, src, 19 ); } void memcpy_20 ( void *dest, void *src ) { memcpy ( dest, src, 20 ); } void memcpy_21 ( void *dest, void *src ) { memcpy ( dest, src, 21 ); } void memcpy_22 ( void *dest, void *src ) { memcpy ( dest, src, 22 ); } void memcpy_23 ( void *dest, void *src ) { memcpy ( dest, src, 23 ); } void memcpy_24 ( void *dest, void *src ) { memcpy ( dest, src, 24 ); } void memcpy_25 ( void *dest, void *src ) { memcpy ( dest, src, 25 ); } void memcpy_26 ( void *dest, void *src ) { memcpy ( dest, src, 26 ); } void memcpy_27 ( void *dest, void *src ) { memcpy ( dest, src, 27 ); } void memcpy_28 ( void *dest, void *src ) { memcpy ( dest, src, 28 ); } void memcpy_29 ( void *dest, void *src ) { memcpy ( dest, src, 29 ); } void memcpy_30 ( void *dest, void *src ) { memcpy ( dest, src, 30 ); } void memcpy_31 ( void *dest, void *src ) { memcpy ( dest, src, 31 ); } /** * Force a call to the variable-length implementation of memcpy() * * @v dest Destination address * @v src Source address * @v len Length of data * @ret dest Destination address */ __attribute__ (( noinline )) void * memcpy_var ( void *dest, const void *src, size_t len ) { return memcpy ( dest, src, len ); } /** * Perform a constant-length memcpy() test * * ... Data to copy */ #define MEMCPY_TEST_CONSTANT( ... ) do { \ static const uint8_t src[] = { __VA_ARGS__ }; \ uint8_t dest_const[ 1 + sizeof ( src ) + 1 ]; \ uint8_t dest_var[ 1 + sizeof ( src ) + 1 ]; \ \ dest_const[0] = 0x33; \ dest_const[ sizeof ( dest_const ) - 1 ] = 0x44; \ memcpy ( ( dest_const + 1 ), src, \ ( sizeof ( dest_const ) - 2 ) ); \ ok ( dest_const[0] == 0x33 ); \ ok ( dest_const[ sizeof ( dest_const ) - 1 ] == 0x44 ); \ ok ( memcmp ( ( dest_const + 1 ), src, \ ( sizeof ( dest_const ) - 2 ) ) == 0 ); \ \ dest_var[0] = 0x55; \ dest_var[ sizeof ( dest_var ) - 1 ] = 0x66; \ memcpy_var ( ( dest_var + 1 ), src, \ ( sizeof ( dest_var ) - 2 ) ); \ ok ( dest_var[0] == 0x55 ); \ ok ( dest_var[ sizeof ( dest_var ) - 1 ] == 0x66 ); \ ok ( memcmp ( ( dest_var + 1 ), src, \ ( sizeof ( dest_var ) - 2 ) ) == 0 ); \ } while ( 0 ) /** * Test memcpy() speed * * @v dest_offset Destination alignment offset * @v src_offset Source alignment offset * @v len Length of data to copy */ static void memcpy_test_speed ( unsigned int dest_offset, unsigned int src_offset, size_t len ) { struct profiler profiler; uint8_t *dest; uint8_t *src; unsigned int i; /* Allocate blocks */ dest = malloc ( len + dest_offset ); assert ( dest != NULL ); src = malloc ( len + src_offset ); assert ( src != NULL ); /* Generate random source data */ for ( i = 0 ; i < len ; i++ ) src[ src_offset + i ] = random(); /* Check correctness of copied data */ memcpy ( ( dest + dest_offset ), ( src + src_offset ), len ); ok ( memcmp ( ( dest + dest_offset ), ( src + src_offset ), len ) == 0 ); /* Profile memcpy() */ memset ( &profiler, 0, sizeof ( profiler ) ); for ( i = 0 ; i < PROFILE_COUNT ; i++ ) { profile_start ( &profiler ); memcpy ( ( dest + dest_offset ), ( src + src_offset ), len ); profile_stop ( &profiler ); } /* Free blocks */ free ( dest ); free ( src ); DBG ( "MEMCPY copied %zd bytes (+%d => +%d) in %ld +/- %ld ticks\n", len, src_offset, dest_offset, profile_mean ( &profiler ), profile_stddev ( &profiler ) ); } /** * Perform memcpy() self-tests * */ static void memcpy_test_exec ( void ) { unsigned int dest_offset; unsigned int src_offset; /* Constant-length tests */ MEMCPY_TEST_CONSTANT ( ); MEMCPY_TEST_CONSTANT ( 0x86 ); MEMCPY_TEST_CONSTANT ( 0x8c, 0xd3 ); MEMCPY_TEST_CONSTANT ( 0x4e, 0x08, 0xed ); MEMCPY_TEST_CONSTANT ( 0xcc, 0x61, 0x8f, 0x70 ); MEMCPY_TEST_CONSTANT ( 0x6d, 0x28, 0xe0, 0x9e, 0x6d ); MEMCPY_TEST_CONSTANT ( 0x7d, 0x13, 0x4f, 0xef, 0x17, 0xb3 ); MEMCPY_TEST_CONSTANT ( 0x38, 0xa7, 0xd4, 0x8d, 0x44, 0x01, 0xfd ); MEMCPY_TEST_CONSTANT ( 0x45, 0x9f, 0xf4, 0xf9, 0xf3, 0x0f, 0x99, 0x43 ); MEMCPY_TEST_CONSTANT ( 0x69, 0x8c, 0xf6, 0x12, 0x79, 0x70, 0xd8, 0x1e, 0x9d ); MEMCPY_TEST_CONSTANT ( 0xbe, 0x53, 0xb4, 0xb7, 0xdd, 0xe6, 0x35, 0x10, 0x3c, 0xe7 ); MEMCPY_TEST_CONSTANT ( 0xaf, 0x41, 0x8a, 0x88, 0xb1, 0x4e, 0x52, 0xd4, 0xe6, 0xc3, 0x76 ); MEMCPY_TEST_CONSTANT ( 0xdf, 0x43, 0xe4, 0x5d, 0xad, 0x17, 0x35, 0x38, 0x1a, 0x1d, 0x57, 0x58 ); MEMCPY_TEST_CONSTANT ( 0x20, 0x52, 0x83, 0x92, 0xb9, 0x85, 0xa4, 0x06, 0x94, 0xe0, 0x3d, 0x57, 0xd4 ); MEMCPY_TEST_CONSTANT ( 0xf1, 0x67, 0x31, 0x9e, 0x32, 0x98, 0x27, 0xe9, 0x8e, 0x62, 0xb4, 0x82, 0x7e, 0x02 ); MEMCPY_TEST_CONSTANT ( 0x93, 0xc1, 0x55, 0xe3, 0x60, 0xce, 0xac, 0x1e, 0xae, 0x9d, 0xca, 0xec, 0x92, 0xb3, 0x38 ); MEMCPY_TEST_CONSTANT ( 0xb3, 0xc1, 0xfa, 0xe7, 0x8a, 0x1c, 0xe4, 0xce, 0x85, 0xe6, 0x3c, 0xab, 0x1c, 0xa2, 0xaf, 0x7a ); MEMCPY_TEST_CONSTANT ( 0x9b, 0x6e, 0x1c, 0x48, 0x82, 0xd3, 0x6e, 0x58, 0xa7, 0xb0, 0xe6, 0xea, 0x6d, 0xee, 0xc8, 0xf8, 0xaf ); MEMCPY_TEST_CONSTANT ( 0x86, 0x6d, 0xb0, 0xf5, 0xf2, 0xc9, 0xcd, 0xfe, 0xfb, 0x38, 0x67, 0xbc, 0x51, 0x9d, 0x25, 0xbc, 0x09, 0x88 ); MEMCPY_TEST_CONSTANT ( 0x58, 0xa4, 0x96, 0x9e, 0x98, 0x36, 0xdb, 0xae, 0x8a, 0x08, 0x7c, 0x64, 0xf9, 0xfb, 0x25, 0xb4, 0x8e, 0xf3, 0xed ); MEMCPY_TEST_CONSTANT ( 0xc6, 0x3b, 0x84, 0x3c, 0x76, 0x24, 0x8e, 0x42, 0x11, 0x1f, 0x09, 0x2e, 0x24, 0xbb, 0x67, 0x71, 0x3a, 0xca, 0x60, 0xdd ); MEMCPY_TEST_CONSTANT ( 0x8e, 0x2d, 0xa9, 0x58, 0x87, 0xe2, 0xac, 0x4b, 0xc8, 0xbf, 0xa2, 0x4e, 0xee, 0x3a, 0xa6, 0x71, 0x76, 0xee, 0x42, 0x05, 0x6e ); MEMCPY_TEST_CONSTANT ( 0x8a, 0xda, 0xdf, 0x7b, 0x55, 0x41, 0x8c, 0xcd, 0x42, 0x40, 0x18, 0xe2, 0x60, 0xc4, 0x7d, 0x64, 0x00, 0xd5, 0xef, 0xa1, 0x7b, 0x31 ); MEMCPY_TEST_CONSTANT ( 0xd9, 0x25, 0xcb, 0xbb, 0x9c, 0x1d, 0xdd, 0xcd, 0xde, 0x96, 0xd9, 0x74, 0x13, 0x95, 0xfe, 0x68, 0x0b, 0x3d, 0x30, 0x8d, 0x0c, 0x1e, 0x6d ); MEMCPY_TEST_CONSTANT ( 0x2d, 0x0d, 0x02, 0x33, 0xd6, 0xbe, 0x6c, 0xa6, 0x0a, 0xab, 0xe5, 0xda, 0xe2, 0xab, 0x78, 0x3c, 0xd3, 0xdd, 0xea, 0xfa, 0x1a, 0xe4, 0xf4, 0xb3 ); MEMCPY_TEST_CONSTANT ( 0x6a, 0x34, 0x39, 0xea, 0x29, 0x5f, 0xa6, 0x18, 0xc1, 0x53, 0x39, 0x78, 0xdb, 0x40, 0xf2, 0x98, 0x78, 0xcf, 0xee, 0xfd, 0xcd, 0xf8, 0x56, 0xf8, 0x30 ); MEMCPY_TEST_CONSTANT ( 0xe4, 0xe5, 0x5a, 0x8d, 0xcf, 0x04, 0x29, 0x7c, 0xa7, 0xd8, 0x43, 0xbf, 0x0b, 0xbf, 0xe7, 0x68, 0xf7, 0x8c, 0x81, 0xf9, 0x3f, 0xad, 0xa4, 0x40, 0x38, 0x82 ); MEMCPY_TEST_CONSTANT ( 0x71, 0xcd, 0x3d, 0x26, 0xde, 0x11, 0x23, 0xd5, 0x42, 0x6e, 0x63, 0x72, 0x53, 0xfc, 0x28, 0x06, 0x4b, 0xe0, 0x2c, 0x07, 0x6b, 0xe8, 0xd9, 0x5f, 0xf8, 0x74, 0xed ); MEMCPY_TEST_CONSTANT ( 0x05, 0xb2, 0xae, 0x81, 0x91, 0xc9, 0xa2, 0x5f, 0xa9, 0x1b, 0x25, 0x7f, 0x32, 0x0c, 0x04, 0x00, 0xf1, 0x46, 0xab, 0x77, 0x1e, 0x12, 0x27, 0xe7, 0xf6, 0x1e, 0x0c, 0x29 ); MEMCPY_TEST_CONSTANT ( 0x0e, 0xca, 0xa5, 0x56, 0x3d, 0x99, 0x99, 0xf9, 0x6e, 0xdd, 0x93, 0x98, 0xec, 0x8b, 0x5c, 0x71, 0x0c, 0xb0, 0xe6, 0x12, 0xf2, 0x10, 0x1a, 0xbe, 0x4a, 0xe0, 0xe3, 0x00, 0xf8 ); MEMCPY_TEST_CONSTANT ( 0x40, 0xa8, 0x28, 0x5b, 0x12, 0x0d, 0x80, 0x8e, 0x8a, 0xd9, 0x92, 0x7a, 0x6e, 0x48, 0x8d, 0x14, 0x4b, 0xc6, 0xce, 0x21, 0x2f, 0x0e, 0x47, 0xbd, 0xf1, 0xca, 0x0e, 0x1f, 0x65, 0xc4 ); MEMCPY_TEST_CONSTANT ( 0x84, 0x83, 0x44, 0xe8, 0x1c, 0xbf, 0x23, 0x05, 0xdf, 0xed, 0x3b, 0xb7, 0x0b, 0x4a, 0x05, 0xec, 0xb7, 0x6f, 0x1c, 0xfe, 0x05, 0x05, 0x4e, 0xd1, 0x50, 0x88, 0x81, 0x87, 0x68, 0xf6, 0x66 ); MEMCPY_TEST_CONSTANT ( 0x0d, 0x1d, 0xcf, 0x3e, 0x7c, 0xf8, 0x12, 0x1b, 0x96, 0x7f, 0xff, 0x27, 0xca, 0xfe, 0xd3, 0x8b, 0x10, 0xb9, 0x5d, 0x05, 0xad, 0x50, 0xed, 0x35, 0x32, 0x9c, 0xe6, 0x3b, 0x73, 0xe0, 0x7d ); /* Speed tests */ memcpy_test_speed ( 0, 0, 64 ); memcpy_test_speed ( 0, 0, 128 ); memcpy_test_speed ( 0, 0, 256 ); for ( dest_offset = 0 ; dest_offset < 4 ; dest_offset++ ) { for ( src_offset = 0 ; src_offset < 4 ; src_offset++ ) { memcpy_test_speed ( dest_offset, src_offset, 4096 ); } } } /** memcpy() self-test */ struct self_test memcpy_test __self_test = { .name = "memcpy", .exec = memcpy_test_exec, };