From 0d92f3047f2bafc60f0d48fcb6e2e5197c97318d Mon Sep 17 00:00:00 2001 From: Jan Vesely Date: Tue, 17 Apr 2018 19:35:28 +0000 Subject: [PATCH] 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 Reviewer: Aaron Watry llvm-svn: 330205 --- libclc/generic/lib/math/clc_pow.cl | 12 +----------- 1 file changed, 1 insertion(+), 11 deletions(-) diff --git a/libclc/generic/lib/math/clc_pow.cl b/libclc/generic/lib/math/clc_pow.cl index fc82df3..02063a2 100644 --- a/libclc/generic/lib/math/clc_pow.cl +++ b/libclc/generic/lib/math/clc_pow.cl @@ -169,17 +169,7 @@ _CLC_DEF _CLC_OVERLOAD float __clc_pow(float x, float y) 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; -- 2.7.4