[Libclc-dev] [PATCH 1/2] Move ldexp soft implementation to a separate file
Jan Vesely
jan.vesely at rutgers.edu
Wed May 6 06:48:34 PDT 2015
Signed-off-by: Jan Vesely <jan.vesely at rutgers.edu>
---
These two patches need to be applied after Tom's series. Alternatively they can be squashed with patches 5/15 and 11/15
generic/include/math/clc_ldexp.h | 6 ++
generic/lib/SOURCES | 1 +
generic/lib/math/clc_ldexp.cl | 129 +++++++++++++++++++++++++++++++++++++++
generic/lib/math/ldexp.cl | 103 +------------------------------
4 files changed, 139 insertions(+), 100 deletions(-)
create mode 100644 generic/include/math/clc_ldexp.h
create mode 100644 generic/lib/math/clc_ldexp.cl
diff --git a/generic/include/math/clc_ldexp.h b/generic/include/math/clc_ldexp.h
new file mode 100644
index 0000000..477dbb2
--- /dev/null
+++ b/generic/include/math/clc_ldexp.h
@@ -0,0 +1,6 @@
+_CLC_DEF _CLC_OVERLOAD float __clc_ldexp(float, int);
+
+#ifdef cl_khr_fp64
+ #pragma OPENCL EXTENSION cl_khr_fp64 : enable
+ _CLC_DEF _CLC_OVERLOAD float __clc_ldexp(double, int);
+#endif
diff --git a/generic/lib/SOURCES b/generic/lib/SOURCES
index 16a8a5c..9a22af6 100644
--- a/generic/lib/SOURCES
+++ b/generic/lib/SOURCES
@@ -91,6 +91,7 @@ math/fract.cl
math/half_rsqrt.cl
math/half_sqrt.cl
math/hypot.cl
+math/clc_ldexp.cl
math/ldexp.cl
math/log10.cl
math/log1p.cl
diff --git a/generic/lib/math/clc_ldexp.cl b/generic/lib/math/clc_ldexp.cl
new file mode 100644
index 0000000..0e51307
--- /dev/null
+++ b/generic/lib/math/clc_ldexp.cl
@@ -0,0 +1,129 @@
+/*
+ * 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 __clc_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;
+}
+
+#ifdef cl_khr_fp64
+
+#pragma OPENCL EXTENSION cl_khr_fp64 : enable
+
+_CLC_DEF _CLC_OVERLOAD double __clc_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;
+}
+
+#endif
+
diff --git a/generic/lib/math/ldexp.cl b/generic/lib/math/ldexp.cl
index 1802bf3..f247003 100644
--- a/generic/lib/math/ldexp.cl
+++ b/generic/lib/math/ldexp.cl
@@ -24,112 +24,15 @@
#include "config.h"
#include "../clcmacro.h"
#include "math.h"
+#include "math/clc_ldexp.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)
+_CLC_DEFINE_BINARY_BUILTIN(float, ldexp, __clc_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)
+_CLC_DEFINE_BINARY_BUILTIN(float, ldexp, __clc_ldexp, float, int)
#endif
--
2.1.0
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