Mercurial > hg > truffle
changeset 1041:f875b4f472f7
6893554: SPECjvm2008 mpegaudio fails with SecurityException
Summary: The problem occurs with negative numbers, as the 32-bit input values are sign extended into the 64-bit registers.
Reviewed-by: kvn
author | twisti |
---|---|
date | Tue, 27 Oct 2009 03:00:27 -0700 |
parents | 873ec3787992 |
children | 4926bf2d292f |
files | src/cpu/sparc/vm/sparc.ad |
diffstat | 1 files changed, 6 insertions(+), 4 deletions(-) [+] |
line wrap: on
line diff
--- a/src/cpu/sparc/vm/sparc.ad Wed Oct 21 09:15:33 2009 -0700 +++ b/src/cpu/sparc/vm/sparc.ad Tue Oct 27 03:00:27 2009 -0700 @@ -9419,8 +9419,9 @@ // x |= (x >> 8); // x |= (x >> 16); // return (WORDBITS - popc(x)); - format %{ "SRL $src,1,$dst\t! count leading zeros (int)\n\t" - "OR $src,$tmp,$dst\n\t" + format %{ "SRL $src,1,$tmp\t! count leading zeros (int)\n\t" + "SRL $src,0,$dst\t! 32-bit zero extend\n\t" + "OR $dst,$tmp,$dst\n\t" "SRL $dst,2,$tmp\n\t" "OR $dst,$tmp,$dst\n\t" "SRL $dst,4,$tmp\n\t" @@ -9437,7 +9438,8 @@ Register Rsrc = $src$$Register; Register Rtmp = $tmp$$Register; __ srl(Rsrc, 1, Rtmp); - __ or3(Rsrc, Rtmp, Rdst); + __ srl(Rsrc, 0, Rdst); + __ or3(Rdst, Rtmp, Rdst); __ srl(Rdst, 2, Rtmp); __ or3(Rdst, Rtmp, Rdst); __ srl(Rdst, 4, Rtmp); @@ -9465,7 +9467,7 @@ // x |= (x >> 16); // x |= (x >> 32); // return (WORDBITS - popc(x)); - format %{ "SRLX $src,1,$dst\t! count leading zeros (long)\n\t" + format %{ "SRLX $src,1,$tmp\t! count leading zeros (long)\n\t" "OR $src,$tmp,$dst\n\t" "SRLX $dst,2,$tmp\n\t" "OR $dst,$tmp,$dst\n\t"