commit aca9d09dac107f8405061e01610cd90d1a0d9356
author Jan Vesely <jan.vesely@rutgers.edu> Tue Apr 17 19:35:28 2018 +0000
committer Copybara-Service <copybara-worker@google.com> Sun Aug 30 16:12:27 2020 -0700
tree 7015738f0c2e082a7f075a408d27af764cb59d7e
parent 68835a20f887c1400f8311ad3435c1f18ac88346

pow: 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: 330205
GitOrigin-RevId: 0d92f3047f2bafc60f0d48fcb6e2e5197c97318d

generic/lib/math/clc_pow.cl

diff --git a/generic/lib/math/clc_pow.cl b/generic/lib/math/clc_pow.cl
index fc82df3..02063a2 100644
--- a/generic/lib/math/clc_pow.cl
+++ b/generic/lib/math/clc_pow.cl
@@ -169,17 +169,7 @@
     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;