system/glibc
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Use a shorter sequence.

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This commit is contained in:
Ulrich Drepper 2000-12-08 17:16:05 +00:00
parent f26c98f0d4
commit 4ba8e511ff
1 changed files with 8 additions and 10 deletions
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18
sysdeps/alpha/htonl.S
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@ -1,4 +1,4 @@
/* Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
/* Copyright (C) 1996, 1997, 1998, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -30,15 +30,13 @@ ENTRY(htonl)
.prologue 0
#endif
extlh a0, 5, t1 # t1 = dd000000
zap a0, 0xfd, t2 # t2 = 0000cc00
sll t2, 5, t2 # t2 = 00198000
s8addl t2, t1, t1 # t1 = ddcc0000
zap a0, 0xfb, t2 # t2 = 00bb0000
srl t2, 8, t2 # t2 = 0000bb00
extbl a0, 3, v0 # v0 = 000000aa
or t1, v0, v0 # v0 = ddcc00aa
or t2, v0, v0 # v0 = ddccbbaa
inslh a0, 7, t0 # t0 = 0000000000AABBCC
inswl a0, 3, t1 # t1 = 000000CCDD000000
or t1, t0, t1 # t1 = 000000CCDDAABBCC
sll t1, 16, t2 # t2 = 0000000000CCDDAA
zapnot t1, 0x0A, t0 # t0 = 00000000DD00BB00
zapnot t2, 0x05, t3 # t3 = 0000000000CC00AA
addl t0, t3, v0 # v0 = ssssssssDDCCBBAA
ret
END(htonl)