12  *
  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 "finitel.s"
  30 
  31 #include "libm.h"
  32 LIBM_ANSI_PRAGMA_WEAK(finitel,function)
  33 #include "libm_synonyms.h"
  34 
  35         ENTRY(finitel)
  36         movl    12(%esp),%eax           / %ax <-- sign&bexp(x)
  37         testl   $0x80000000,8(%esp)     / ZF = 1 iff hi_32(sgnfcnd(x))'s msb = 0
  38         jz      .chk_denormal_or_0
  39         notl    %eax                    / not(bexp) = 0 iff bexp = all 1's
  40         andl    $0x00007fff,%eax        / ZF <-- 1      iff not(bexp) = 0
  41         jz      .done                   / no jump if arg. is finite
  42         movl    $1,%eax                 / ansi needs %eax = 1
  43 .done:
  44         ret
  45 
  46 .chk_denormal_or_0:
  47         andl    $0x00007fff,%eax        / ZF <-- 1 iff bexp = 0 iff denormal or 0
  48         jnz     .unsupported            / jump if arg has unsupported format
  49         movl    $1,%eax                 / ansi needs %eax = 1
  50         ret
  51 
  52 .unsupported:
  53         movl    $0,%eax                 / unsupported format does not represent

  12  *
  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 "finitel.s"
  30 
  31 #include "libm.h"


  32 
  33         ENTRY(finitel)
  34         movl    12(%esp),%eax           / %ax <-- sign&bexp(x)
  35         testl   $0x80000000,8(%esp)     / ZF = 1 iff hi_32(sgnfcnd(x))'s msb = 0
  36         jz      .chk_denormal_or_0
  37         notl    %eax                    / not(bexp) = 0 iff bexp = all 1's
  38         andl    $0x00007fff,%eax        / ZF <-- 1      iff not(bexp) = 0
  39         jz      .done                   / no jump if arg. is finite
  40         movl    $1,%eax                 / ansi needs %eax = 1
  41 .done:
  42         ret
  43 
  44 .chk_denormal_or_0:
  45         andl    $0x00007fff,%eax        / ZF <-- 1 iff bexp = 0 iff denormal or 0
  46         jnz     .unsupported            / jump if arg has unsupported format
  47         movl    $1,%eax                 / ansi needs %eax = 1
  48         ret
  49 
  50 .unsupported:
  51         movl    $0,%eax                 / unsupported format does not represent