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| author | Russ Cox <rsc@golang.org> | 2009-11-15 12:57:09 -0800 |
|---|---|---|
| committer | Russ Cox <rsc@golang.org> | 2009-11-15 12:57:09 -0800 |
| commit | a58fd66357f6b2b1cf1b50d0f93eb30fd28d7693 (patch) | |
| tree | 4df91b85cdb8c5bfe3bb1ac5be58df0e5ecd375d /src/cmd/gc/obj.c | |
| parent | 9c40101b22b381b3946e373a6d50000d348146f5 (diff) | |
| download | golang-a58fd66357f6b2b1cf1b50d0f93eb30fd28d7693.tar.gz | |
gc: five bug fixes, one better error.
* check for struct literal assignment to private fields.
* record, fix crash involving parallel map assignment.
* avoid infinite recursion in exportassignok.
* make floating point bounds check precise.
* avoid crash on invalid receiver.
* add context to error about implicit assignment.
Fixes issue 86.
Fixes issue 88.
Fixes issue 158.
Fixes issue 174.
Fixes issue 201.
Fixes issue 204.
R=ken2
http://codereview.appspot.com/154144
Diffstat (limited to 'src/cmd/gc/obj.c')
| -rw-r--r-- | src/cmd/gc/obj.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/src/cmd/gc/obj.c b/src/cmd/gc/obj.c index 49216b953..5b6bb1bf3 100644 --- a/src/cmd/gc/obj.c +++ b/src/cmd/gc/obj.c @@ -114,6 +114,7 @@ ieeedtod(uint64 *ieee, double native) double fr, ho, f; int exp; uint32 h, l; + uint64 bits; if(native < 0) { ieeedtod(ieee, -native); @@ -129,13 +130,20 @@ ieeedtod(uint64 *ieee, double native) fr = modf(fr*f, &ho); h = ho; h &= 0xfffffL; - h |= (exp+1022L) << 20; f = 65536L; fr = modf(fr*f, &ho); l = ho; l <<= 16; l |= (int32)(fr*f); - *ieee = ((uint64)h << 32) | l; + bits = ((uint64)h<<32) | l; + if(exp < -1021) { + // gradual underflow + bits |= 1LL<<52; + bits >>= -1021 - exp; + exp = -1022; + } + bits |= (uint64)(exp+1022L) << 52; + *ieee = bits; } int |