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>
git-svn-id: https://llvm.org/svn/llvm-project/libclc/trunk@330207 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/generic/lib/math/clc_powr.cl b/generic/lib/math/clc_powr.cl
index 9074a8b..ef97d3c 100644
--- a/generic/lib/math/clc_powr.cl
+++ b/generic/lib/math/clc_powr.cl
@@ -165,17 +165,7 @@
tv = USE_TABLE(exp_tbl_ep, j);
float expylogx = mad(tv.s0, poly, mad(tv.s1, poly, tv.s1)) + tv.s0;
- float sexpylogx;
- if (!__clc_fp32_subnormals_supported()) {
- int explg = ((as_uint(expylogx) & EXPBITS_SP32 >> 23) - 127);
- m = (23-(m + 149)) == 0 ? 1: m;
- uint mantissa = ((as_uint(expylogx) & MANTBITS_SP32)|IMPBIT_SP32) >> (23-(m + 149));
- sexpylogx = as_float(mantissa);
- } else {
- sexpylogx = expylogx * as_float(0x1 << (m + 149));
- }
-
-
+ float sexpylogx = expylogx * as_float(0x1 << (m + 149));
float texpylogx = as_float(as_int(expylogx) + m2);
expylogx = m < -125 ? sexpylogx : texpylogx;
