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Add more sparcv8plus comments.

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This commit is contained in:
Bruce Momjian
2006-05-18 01:06:28 +00:00
parent d6a35c8125
commit 3c5665d088
1 changed files with 4 additions and 4 deletions
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8
src/backend/port/tas/solaris_sparc.s
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@ -22,13 +22,13 @@ pg_atomic_cas:
! by a sparcv8 CPU. gcc continues to use "ldstub" because
! there is no indication which sparc version it is targeting.
!
! There actually is a trick for embedding "cas" for a compiler
! that is targeting sparcv8:
! It is actually possible to use "cas" for sparcv8 binaries if
! -xarch=v8plus is used for compilation. There is actually a
! trick for embedding "cas" in a sparcv8-targeted compiler, but
! it can only be run on a sparcv8plus cpus:
!
! http://cvs.opensolaris.org/source/xref/on/usr/src/lib/libc/sparc/threads/sparc.il
!
! It is actually possible to use "cas" for sparcv8 binaries if
! -xarch=v8plus is used for compilation.
#ifdef __sparcv9
cas [%o0],%o2,%o1