powr: Use denormal path only
It's OK to either flush to 0 or return denormal result if the device does not support denormals. See sec 7.2 and 7.5.3 of OCL specs Fixes CTS on carrizo and turks. Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu> Reviewer: Aaron Watry <awatry@gmail.com> llvm-svn: 330207
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@ -165,17 +165,7 @@ _CLC_DEF _CLC_OVERLOAD float __clc_powr(float x, float y)
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tv = USE_TABLE(exp_tbl_ep, j);
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float expylogx = mad(tv.s0, poly, mad(tv.s1, poly, tv.s1)) + tv.s0;
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float sexpylogx;
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if (!__clc_fp32_subnormals_supported()) {
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int explg = ((as_uint(expylogx) & EXPBITS_SP32 >> 23) - 127);
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m = (23-(m + 149)) == 0 ? 1: m;
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uint mantissa = ((as_uint(expylogx) & MANTBITS_SP32)|IMPBIT_SP32) >> (23-(m + 149));
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sexpylogx = as_float(mantissa);
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} else {
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sexpylogx = expylogx * as_float(0x1 << (m + 149));
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}
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float sexpylogx = expylogx * as_float(0x1 << (m + 149));
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float texpylogx = as_float(as_int(expylogx) + m2);
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expylogx = m < -125 ? sexpylogx : texpylogx;
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