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Another bitops fallback fix 

I'm confident that all bugs are hashed out now.
This commit is contained in:
Behdad Esfahbod 2018-02-16 18:28:58 -08:00
parent 4e517ecb6b
commit cd11107bb4
1 changed files with 2 additions and 2 deletions
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4
src/hb-private.hh
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@ -474,7 +474,7 @@ _hb_ctz (T v)
{ {
/* "bithacks" */ /* "bithacks" */
unsigned int c = 32; unsigned int c = 32;
v &= -signed(v); v &= - (int32_t) v;
if (v) c--; if (v) c--;
if (v & 0x0000FFFF) c -= 16; if (v & 0x0000FFFF) c -= 16;
if (v & 0x00FF00FF) c -= 8; if (v & 0x00FF00FF) c -= 8;
@ -487,7 +487,7 @@ _hb_ctz (T v)
{ {
/* "bithacks" */ /* "bithacks" */
unsigned int c = 64; unsigned int c = 64;
v &= -signed(v); v &= - (int64_t) (v);
if (v) c--; if (v) c--;
if (v & 0x00000000FFFFFFFF) c -= 32; if (v & 0x00000000FFFFFFFF) c -= 32;
if (v & 0x0000FFFF0000FFFF) c -= 16; if (v & 0x0000FFFF0000FFFF) c -= 16;