[test] Add memcpy() self-tests

Signed-off-by: Michael Brown <mcb30@ipxe.org>

1 files changed, 256 insertions, 34 deletions

diff --git a/src/tests/memcpy_test.c b/src/tests/memcpy_test.c
index 7626e639..b405a9f2 100644
--- a/src/tests/memcpy_test.c
+++ b/src/tests/memcpy_test.c
@@ -1,39 +1,261 @@
+/*
+ * Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * 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.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+/** @file
+ *
+ * memcpy() self-tests
+ *
+ */
+
+/* Forcibly enable assertions */
+#undef NDEBUG
+
+#include <stdint.h>
+#include <stdlib.h>
 #include <string.h>
+#include <ipxe/test.h>
+#include <ipxe/profile.h>
 
-/*
- * This file exists for testing the compilation of memcpy() with the
- * various constant-length optimisations.
+/* 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 ) {
+	uint8_t *dest;
+	uint8_t *src;
+	unsigned int i;
+	unsigned long elapsed;
+
+	/* 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();
+
+	/* Perform memcpy() */
+	simple_profile();
+	memcpy ( ( dest + dest_offset ), ( src + src_offset ), len );
+	elapsed = simple_profile();
+
+	/* Check copied data */
+	ok ( memcmp ( ( dest + dest_offset ), ( src + src_offset ),
+		      len ) == 0 );
+
+	/* Free blocks */
+	free ( dest );
+	free ( src );
+
+	DBG ( "MEMCPY copied %zd bytes (+%d => +%d) in %ld ticks\n",
+	      len, src_offset, dest_offset, elapsed );
+}
+
+/**
+ * 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 );
+		}
+	}
+}
 
-#define __regparm __attribute__ (( regparm(3) ))
-
-void __regparm memcpy_0 ( void *dest, void *src ) { memcpy ( dest, src, 0 ); }
-void __regparm memcpy_1 ( void *dest, void *src ) { memcpy ( dest, src, 1 ); }
-void __regparm memcpy_2 ( void *dest, void *src ) { memcpy ( dest, src, 2 ); }
-void __regparm memcpy_3 ( void *dest, void *src ) { memcpy ( dest, src, 3 ); }
-void __regparm memcpy_4 ( void *dest, void *src ) { memcpy ( dest, src, 4 ); }
-void __regparm memcpy_5 ( void *dest, void *src ) { memcpy ( dest, src, 5 ); }
-void __regparm memcpy_6 ( void *dest, void *src ) { memcpy ( dest, src, 6 ); }
-void __regparm memcpy_7 ( void *dest, void *src ) { memcpy ( dest, src, 7 ); }
-void __regparm memcpy_8 ( void *dest, void *src ) { memcpy ( dest, src, 8 ); }
-void __regparm memcpy_9 ( void *dest, void *src ) { memcpy ( dest, src, 9 ); }
-void __regparm memcpy_10 ( void *dest, void *src ) { memcpy ( dest, src, 10 ); }
-void __regparm memcpy_11 ( void *dest, void *src ) { memcpy ( dest, src, 11 ); }
-void __regparm memcpy_12 ( void *dest, void *src ) { memcpy ( dest, src, 12 ); }
-void __regparm memcpy_13 ( void *dest, void *src ) { memcpy ( dest, src, 13 ); }
-void __regparm memcpy_14 ( void *dest, void *src ) { memcpy ( dest, src, 14 ); }
-void __regparm memcpy_15 ( void *dest, void *src ) { memcpy ( dest, src, 15 ); }
-void __regparm memcpy_16 ( void *dest, void *src ) { memcpy ( dest, src, 16 ); }
-void __regparm memcpy_17 ( void *dest, void *src ) { memcpy ( dest, src, 17 ); }
-void __regparm memcpy_18 ( void *dest, void *src ) { memcpy ( dest, src, 18 ); }
-void __regparm memcpy_19 ( void *dest, void *src ) { memcpy ( dest, src, 19 ); }
-void __regparm memcpy_20 ( void *dest, void *src ) { memcpy ( dest, src, 20 ); }
-void __regparm memcpy_21 ( void *dest, void *src ) { memcpy ( dest, src, 21 ); }
-void __regparm memcpy_22 ( void *dest, void *src ) { memcpy ( dest, src, 22 ); }
-void __regparm memcpy_23 ( void *dest, void *src ) { memcpy ( dest, src, 23 ); }
-void __regparm memcpy_24 ( void *dest, void *src ) { memcpy ( dest, src, 24 ); }
-void __regparm memcpy_25 ( void *dest, void *src ) { memcpy ( dest, src, 25 ); }
-void __regparm memcpy_26 ( void *dest, void *src ) { memcpy ( dest, src, 26 ); }
-void __regparm memcpy_27 ( void *dest, void *src ) { memcpy ( dest, src, 27 ); }
-void __regparm memcpy_28 ( void *dest, void *src ) { memcpy ( dest, src, 28 ); }
+/** memcpy() self-test */
+struct self_test memcpy_test __self_test = {
+	.name = "memcpy",
+	.exec = memcpy_test_exec,
+};