diff options
| author | Roland McGrath <roland@gnu.org> | 1995-12-04 18:37:56 +0000 |
|---|---|---|
| committer | Roland McGrath <roland@gnu.org> | 1995-12-04 18:37:56 +0000 |
| commit | ba848785bb048e7700555ef97c9d1fd3911a3da3 (patch) | |
| tree | 646ee57c65b8d2231e235caa069d7fea634e8b64 /sysdeps/i386/i586/lshift.S | |
| parent | c13a4f3dbd44ff03d85ad1ac35cca38c3f35d33c (diff) | |
Updated from ../=mpn/gmp-1.910
Diffstat (limited to 'sysdeps/i386/i586/lshift.S')
| -rw-r--r-- | sysdeps/i386/i586/lshift.S | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/sysdeps/i386/i586/lshift.S b/sysdeps/i386/i586/lshift.S index b9f8131297..c41f74e17d 100644 --- a/sysdeps/i386/i586/lshift.S +++ b/sysdeps/i386/i586/lshift.S @@ -43,12 +43,15 @@ C_SYMBOL_NAME(__mpn_lshift:) movl 28(%esp),%ebp /* size */ movl 32(%esp),%ecx /* cnt */ +/* We can use faster code for shift-by-1 under certain conditions. */ cmp $1,%ecx jne Lnormal - movl %edi,%eax - subl %esi,%eax - cmpl %ebp,%eax - jnc Lspecial + leal 4(%esi),%eax + cmpl %edi,%eax + jnc Lspecial /* jump if s_ptr + 1 >= res_ptr */ + leal (%esi,%ebp,4),%eax + cmpl %eax,%edi + jnc Lspecial /* jump if res_ptr >= s_ptr + size */ Lnormal: leal -4(%edi,%ebp,4),%edi |