diff options
| author | rander <rander.wang@intel.com> | 2017-03-20 13:46:46 +0800 |
|---|---|---|
| committer | Yang Rong <rong.r.yang@intel.com> | 2017-04-17 16:08:48 +0800 |
| commit | f123b40c7888fa2f34971c0b61d51e75dcd44aa7 (patch) | |
| tree | c47a69cba757292649e4bddc6956dff42787e26f | |
| parent | aa4c02eac877cbd9bbaed2da42ffa215da0d4726 (diff) | |
backend: refine convert_float_rtn(double x)
deal with every corner case (-+inf, NAN...)when convert
Signed-off-by: rander <rander.wang@intel.com>
Tested-by: Yang Rong <rong.r.yang@intel.com>
| -rwxr-xr-x | backend/src/libocl/script/ocl_convert.sh | 35 |
1 files changed, 23 insertions, 12 deletions
diff --git a/backend/src/libocl/script/ocl_convert.sh b/backend/src/libocl/script/ocl_convert.sh index bc02de38..f063f095 100755 --- a/backend/src/libocl/script/ocl_convert.sh +++ b/backend/src/libocl/script/ocl_convert.sh @@ -657,23 +657,34 @@ OVERLOADABLE float convert_float_rtn(double x) long lval = as_long(x); int exp = ((lval & DF_EXP_MASK) >> DF_EXP_OFFSET) - DF_EXP_BIAS; int sign = (lval & DF_SIGN_MASK)?1:0; + long ma = (lval &DF_MAN_MASK); - ret = sign; - ret = (lval & DF_ABS_MASK) ? ret:0; - tmp = 0x1000000 >> (23 - (exp + 149)); + int fval = ((exp + 127) << 23) |convert_int(ma >> 29); + if((ma & 0x1FFFFFFF) && sign) fval += 1; + ret = fval; + + ma |= DF_IMPLICITE_ONE; + tmp = ma >> (-exp - 97); + long shift = (1UL << (-exp - 97)) -1UL; + if((ma & shift) && sign) tmp += 1; ret = (exp < -126) ? tmp:ret; - long ma = (lval &DF_MAN_MASK); - tmp = (lval & DF_MAN_MASK) ? SF_NAN:SF_POSITIVE_INF; - ret = (exp == 1024) ? tmp:ret; - tmp = SF_POSITIVE_INF; + + tmp = sign; + ret = (exp < -149) ? tmp:ret; + + tmp = sign ? 0x7F800000:0x7F7FFFFF; ret = (exp > 127) ? tmp:ret; - ret = (lval & DF_ABS_MASK) ? ret:0; - tmp = ((exp + 127) << 23) |convert_int(ma >> 29); - if((ma & 0x1FFFFFFF) && sign) tmp += 1; - ret = ((exp >= -126) && (exp <= 127)) ? tmp:ret; + + tmp = (lval & DF_MAN_MASK) ? 0x7FFFFFFF:0x7F800000; + ret = (exp == 1024) ? tmp:ret; + + tmp = sign ? (0xFF800000) : (0x7F7FFFFF); + ret = ((exp == 1023) && (ma == DF_MAN_MASK)) ? tmp:ret; + + ret = ((lval & DF_ABS_MASK) == 0) ? 0:ret; + ret |= (sign << 31); float ftemp = as_float(ret); - return ftemp; } |