[libclc] r236639 - math: Add ldexp implementation
Tom Stellard
thomas.stellard at amd.com
Wed May 6 13:53:32 PDT 2015
Author: tstellar
Date: Wed May 6 15:53:32 2015
New Revision: 236639
URL: http://llvm.org/viewvc/llvm-project?rev=236639&view=rev
Log:
math: Add ldexp implementation
Signed-off-by: Aaron Watry <awatry at gmail.com>
Tom Stellard:
- Add denormal handling.
- Share vectorization code with r600 implementation.
Patch By: Aaron Watry
Added:
libclc/trunk/generic/lib/math/ldexp.cl
libclc/trunk/generic/lib/math/ldexp.inc
- copied, changed from r236638, libclc/trunk/r600/lib/math/ldexp.inc
Removed:
libclc/trunk/r600/lib/math/ldexp.inc
Modified:
libclc/trunk/generic/lib/SOURCES
libclc/trunk/generic/lib/clcmacro.h
libclc/trunk/r600/lib/math/ldexp.cl
Modified: libclc/trunk/generic/lib/SOURCES
URL: http://llvm.org/viewvc/llvm-project/libclc/trunk/generic/lib/SOURCES?rev=236639&r1=236638&r2=236639&view=diff
==============================================================================
--- libclc/trunk/generic/lib/SOURCES (original)
+++ libclc/trunk/generic/lib/SOURCES Wed May 6 15:53:32 2015
@@ -84,6 +84,7 @@ math/fmod.cl
math/fract.cl
math/half_sqrt.cl
math/hypot.cl
+math/ldexp.cl
math/log10.cl
math/log1p.cl
math/mad.cl
Modified: libclc/trunk/generic/lib/clcmacro.h
URL: http://llvm.org/viewvc/llvm-project/libclc/trunk/generic/lib/clcmacro.h?rev=236639&r1=236638&r2=236639&view=diff
==============================================================================
--- libclc/trunk/generic/lib/clcmacro.h (original)
+++ libclc/trunk/generic/lib/clcmacro.h Wed May 6 15:53:32 2015
@@ -115,6 +115,10 @@ _CLC_DEF _CLC_OVERLOAD RET_TYPE FUNCTION
} \
_CLC_BINARY_VECTORIZE(_CLC_OVERLOAD _CLC_DEF, RET_TYPE, FUNCTION, ARG1_TYPE, ARG2_TYPE)
+#define _CLC_DEFINE_BINARY_BUILTIN_WITH_SCALAR_SECOND_ARG(RET_TYPE, FUNCTION, BUILTIN, ARG1_TYPE, ARG2_TYPE) \
+_CLC_DEFINE_BINARY_BUILTIN(RET_TYPE, FUNCTION, BUILTIN, ARG1_TYPE, ARG2_TYPE) \
+_CLC_BINARY_VECTORIZE_SCALAR_SECOND_ARG(_CLC_OVERLOAD _CLC_DEF, RET_TYPE, FUNCTION, ARG1_TYPE, ARG2_TYPE)
+
#define _CLC_DEFINE_UNARY_BUILTIN(RET_TYPE, FUNCTION, BUILTIN, ARG1_TYPE) \
_CLC_DEF _CLC_OVERLOAD RET_TYPE FUNCTION(ARG1_TYPE x) { \
return BUILTIN(x); \
Added: libclc/trunk/generic/lib/math/ldexp.cl
URL: http://llvm.org/viewvc/llvm-project/libclc/trunk/generic/lib/math/ldexp.cl?rev=236639&view=auto
==============================================================================
--- libclc/trunk/generic/lib/math/ldexp.cl (added)
+++ libclc/trunk/generic/lib/math/ldexp.cl Wed May 6 15:53:32 2015
@@ -0,0 +1,138 @@
+/*
+ * Copyright (c) 2014 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <clc/clc.h>
+#include "config.h"
+#include "../clcmacro.h"
+#include "math.h"
+
+_CLC_DEF _CLC_OVERLOAD float ldexp(float x, int n) {
+
+ if (!__clc_fp32_subnormals_supported()) {
+
+ // This treats subnormals as zeros
+ int i = as_int(x);
+ int e = (i >> 23) & 0xff;
+ int m = i & 0x007fffff;
+ int s = i & 0x80000000;
+ int v = add_sat(e, n);
+ v = clamp(v, 0, 0xff);
+ int mr = e == 0 | v == 0 | v == 0xff ? 0 : m;
+ int c = e == 0xff;
+ mr = c ? m : mr;
+ int er = c ? e : v;
+ er = e ? er : e;
+ return as_float( s | (er << 23) | mr );
+ }
+
+ /* supports denormal values */
+ const int multiplier = 24;
+ float val_f;
+ uint val_ui;
+ uint sign;
+ int exponent;
+ val_ui = as_uint(x);
+ sign = val_ui & 0x80000000;
+ val_ui = val_ui & 0x7fffffff;/* remove the sign bit */
+ int val_x = val_ui;
+
+ exponent = val_ui >> 23; /* get the exponent */
+ int dexp = exponent;
+
+ /* denormal support */
+ int fbh = 127 - (as_uint((float)(as_float(val_ui | 0x3f800000) - 1.0f)) >> 23);
+ int dexponent = 25 - fbh;
+ uint dval_ui = (( (val_ui << fbh) & 0x007fffff) | (dexponent << 23));
+ int ex = dexponent + n - multiplier;
+ dexponent = ex;
+ uint val = sign | (ex << 23) | (dval_ui & 0x007fffff);
+ int ex1 = dexponent + multiplier;
+ ex1 = -ex1 +25;
+ dval_ui = (((dval_ui & 0x007fffff )| 0x800000) >> ex1);
+ dval_ui = dexponent > 0 ? val :dval_ui;
+ dval_ui = dexponent > 254 ? 0x7f800000 :dval_ui; /*overflow*/
+ dval_ui = dexponent < -multiplier ? 0 : dval_ui; /*underflow*/
+ dval_ui = dval_ui | sign;
+ val_f = as_float(dval_ui);
+
+ exponent += n;
+
+ val = sign | (exponent << 23) | (val_ui & 0x007fffff);
+ ex1 = exponent + multiplier;
+ ex1 = -ex1 +25;
+ val_ui = (((val_ui & 0x007fffff )| 0x800000) >> ex1);
+ val_ui = exponent > 0 ? val :val_ui;
+ val_ui = exponent > 254 ? 0x7f800000 :val_ui; /*overflow*/
+ val_ui = exponent < -multiplier ? 0 : val_ui; /*underflow*/
+ val_ui = val_ui | sign;
+
+ val_ui = dexp == 0? dval_ui : val_ui;
+ val_f = as_float(val_ui);
+
+ val_f = isnan(x) | isinf(x) | val_x == 0 ? x : val_f;
+ return val_f;
+}
+
+// This defines all the ldexp(floatN, intN) variants.
+_CLC_BINARY_VECTORIZE(_CLC_OVERLOAD _CLC_DEF, float, ldexp, float, int)
+
+#ifdef cl_khr_fp64
+
+#pragma OPENCL EXTENSION cl_khr_fp64 : enable
+
+_CLC_DEF _CLC_OVERLOAD double ldexp(double x, int n) {
+ long l = as_ulong(x);
+ int e = (l >> 52) & 0x7ff;
+ long s = l & 0x8000000000000000;
+
+ ulong ux = as_ulong(x * 0x1.0p+53);
+ int de = ((int)(ux >> 52) & 0x7ff) - 53;
+ int c = e == 0;
+ e = c ? de: e;
+
+ ux = c ? ux : l;
+
+ int v = e + n;
+ v = clamp(v, -0x7ff, 0x7ff);
+
+ ux &= ~EXPBITS_DP64;
+
+ double mr = as_double(ux | ((ulong)(v+53) << 52));
+ mr = mr * 0x1.0p-53;
+
+ mr = v > 0 ? as_double(ux | ((ulong)v << 52)) : mr;
+
+ mr = v == 0x7ff ? as_double(s | PINFBITPATT_DP64) : mr;
+ mr = v < -53 ? as_double(s) : mr;
+
+ mr = ((n == 0) | isinf(x) | (x == 0) ) ? x : mr;
+ return mr;
+}
+
+// This defines all the ldexp(doubleN, intN) variants.
+_CLC_BINARY_VECTORIZE(_CLC_OVERLOAD _CLC_DEF, double, ldexp, double, int)
+
+#endif
+
+// This defines all the ldexp(GENTYPE, int) variants
+#define __CLC_BODY <ldexp.inc>
+#include <clc/math/gentype.inc>
Copied: libclc/trunk/generic/lib/math/ldexp.inc (from r236638, libclc/trunk/r600/lib/math/ldexp.inc)
URL: http://llvm.org/viewvc/llvm-project/libclc/trunk/generic/lib/math/ldexp.inc?p2=libclc/trunk/generic/lib/math/ldexp.inc&p1=libclc/trunk/r600/lib/math/ldexp.inc&r1=236638&r2=236639&rev=236639&view=diff
==============================================================================
(empty)
Modified: libclc/trunk/r600/lib/math/ldexp.cl
URL: http://llvm.org/viewvc/llvm-project/libclc/trunk/r600/lib/math/ldexp.cl?rev=236639&r1=236638&r2=236639&view=diff
==============================================================================
--- libclc/trunk/r600/lib/math/ldexp.cl (original)
+++ libclc/trunk/r600/lib/math/ldexp.cl Wed May 6 15:53:32 2015
@@ -34,5 +34,5 @@ _CLC_DEFINE_BINARY_BUILTIN(float, ldexp,
#endif
// This defines all the ldexp(GENTYPE, int);
-#define __CLC_BODY <ldexp.inc>
+#define __CLC_BODY <../../../generic/lib/math/ldexp.inc>
#include <clc/math/gentype.inc>
Removed: libclc/trunk/r600/lib/math/ldexp.inc
URL: http://llvm.org/viewvc/llvm-project/libclc/trunk/r600/lib/math/ldexp.inc?rev=236638&view=auto
==============================================================================
--- libclc/trunk/r600/lib/math/ldexp.inc (original)
+++ libclc/trunk/r600/lib/math/ldexp.inc (removed)
@@ -1,29 +0,0 @@
-/*
- * Copyright (c) 2014 Advanced Micro Devices, Inc.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-#ifndef __CLC_SCALAR
-
-_CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE ldexp(__CLC_GENTYPE x, int n) {
- return ldexp(x, (__CLC_INTN)n);
-}
-
-#endif
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