13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
23 */
24 /*
25 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
26 * Use is subject to license terms.
27 */
28
29 .file "exp2f.s"
30
31 #include "libm.h"
32 LIBM_ANSI_PRAGMA_WEAK(exp2f,function)
33 #include "libm_synonyms.h"
34
35 ENTRY(exp2f)
36 movl 4(%esp),%ecx / ecx <-- x
37 andl $0x7fffffff,%ecx / ecx <-- |x|
38 cmpl $0x3f800000,%ecx / Is |x| <= 1?
39 jbe .shortcut / If so, take a shortcut.
40 cmpl $0x7f800000,%ecx / |x| >= INF?
41 jae .not_finite / if so, x is not finite
42 flds 4(%esp) / push arg
43 fld %st(0) / duplicate stack top
44 frndint / [x],x
45 fucom / x integral?
46 fstsw %ax
47 sahf
48 je .x_integral / branch if x integral
49 fxch / x, [x]
50 fsub %st(1),%st / x-[x], [x]
51 f2xm1 / 2**(x-[x])-1, [x]
52 fld1 / 1,2**(x-[x])-1, [x]
53 faddp %st,%st(1) / 2**(x-[x]), [x]
|
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
23 */
24 /*
25 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
26 * Use is subject to license terms.
27 */
28
29 .file "exp2f.s"
30
31 #include "libm.h"
32 LIBM_ANSI_PRAGMA_WEAK(exp2f,function)
33
34 ENTRY(exp2f)
35 movl 4(%esp),%ecx / ecx <-- x
36 andl $0x7fffffff,%ecx / ecx <-- |x|
37 cmpl $0x3f800000,%ecx / Is |x| <= 1?
38 jbe .shortcut / If so, take a shortcut.
39 cmpl $0x7f800000,%ecx / |x| >= INF?
40 jae .not_finite / if so, x is not finite
41 flds 4(%esp) / push arg
42 fld %st(0) / duplicate stack top
43 frndint / [x],x
44 fucom / x integral?
45 fstsw %ax
46 sahf
47 je .x_integral / branch if x integral
48 fxch / x, [x]
49 fsub %st(1),%st / x-[x], [x]
50 f2xm1 / 2**(x-[x])-1, [x]
51 fld1 / 1,2**(x-[x])-1, [x]
52 faddp %st,%st(1) / 2**(x-[x]), [x]
|