[Libclc-dev] [PATCH 2/2] math: Add ldexp implementation
Aaron Watry
awatry at gmail.com
Thu Mar 12 18:48:13 PDT 2015
Signed-off-by: Aaron Watry <awatry at gmail.com>
---
generic/include/clc/clc.h | 1 +
generic/include/clc/math/binary_decl.inc | 18 ++++-
generic/include/clc/math/gentype_tss.inc | 108 +++++++++++++++++++++++++++++
generic/include/clc/math/ldexp.h | 9 +++
generic/lib/SOURCES | 1 +
generic/lib/clcmacro.h | 26 +++++++
generic/lib/math/ldexp.cl | 114 +++++++++++++++++++++++++++++++
7 files changed, 274 insertions(+), 3 deletions(-)
create mode 100644 generic/include/clc/math/gentype_tss.inc
create mode 100644 generic/include/clc/math/ldexp.h
create mode 100644 generic/lib/math/ldexp.cl
diff --git a/generic/include/clc/clc.h b/generic/include/clc/clc.h
index 1c12cf3..ecabcf1 100644
--- a/generic/include/clc/clc.h
+++ b/generic/include/clc/clc.h
@@ -51,6 +51,7 @@
#include <clc/math/fmin.h>
#include <clc/math/fmod.h>
#include <clc/math/hypot.h>
+#include <clc/math/ldexp.h>
#include <clc/math/log.h>
#include <clc/math/log10.h>
#include <clc/math/log1p.h>
diff --git a/generic/include/clc/math/binary_decl.inc b/generic/include/clc/math/binary_decl.inc
index 70a7114..1805527 100644
--- a/generic/include/clc/math/binary_decl.inc
+++ b/generic/include/clc/math/binary_decl.inc
@@ -1,6 +1,18 @@
-_CLC_OVERLOAD _CLC_DECL __CLC_GENTYPE __CLC_FUNCTION(__CLC_GENTYPE a, __CLC_GENTYPE b);
-_CLC_OVERLOAD _CLC_DECL __CLC_GENTYPE __CLC_FUNCTION(__CLC_GENTYPE a, float b);
+#ifdef __CLC_INT_GENTYPE
+ #if !defined(__CLC_SCALAR)
+ _CLC_OVERLOAD _CLC_DECL __CLC_GENTYPE __CLC_FUNCTION(__CLC_GENTYPE a, __CLC_INT_GENTYPE b);
+ #endif
+ _CLC_OVERLOAD _CLC_DECL __CLC_GENTYPE __CLC_FUNCTION(__CLC_GENTYPE a, __CLC_SCALAR_INT_TYPE b);
+
+#else
+
+#if !defined(__CLC_SCALAR)
+ _CLC_OVERLOAD _CLC_DECL __CLC_GENTYPE __CLC_FUNCTION(__CLC_GENTYPE a, __CLC_GENTYPE b);
+#endif
+ _CLC_OVERLOAD _CLC_DECL __CLC_GENTYPE __CLC_FUNCTION(__CLC_GENTYPE a, float b);
#ifdef cl_khr_fp64
-_CLC_OVERLOAD _CLC_DECL __CLC_GENTYPE __CLC_FUNCTION(__CLC_GENTYPE a, double b);
+ _CLC_OVERLOAD _CLC_DECL __CLC_GENTYPE __CLC_FUNCTION(__CLC_GENTYPE a, double b);
+#endif
+
#endif
diff --git a/generic/include/clc/math/gentype_tss.inc b/generic/include/clc/math/gentype_tss.inc
new file mode 100644
index 0000000..11ec9ff
--- /dev/null
+++ b/generic/include/clc/math/gentype_tss.inc
@@ -0,0 +1,108 @@
+/* Used to provide support for multi-arg functions where the argument types and/or sizes do NOT match
+ *
+ * e.g. ldexp(float16,int), ldexp(float16,int16), ldexp(double8, int)
+ *
+ * In general, consumers of this include will probably have versions with a vector first argument, and then
+ * vector/scalar 2nd argument which may have an entirely different base type.
+ */
+
+#define __CLC_SCALAR_GENTYPE float
+#ifndef __CLC_SCALAR_INT_TYPE
+ #define __CLC_UNDEF_SCALAR_INT_TYPE
+ #define __CLC_SCALAR_INT_TYPE int
+#endif
+#define __CLC_FPSIZE 32
+
+#define __CLC_GENTYPE float
+#define __CLC_INT_GENTYPE int
+#define __CLC_SCALAR
+#include __CLC_BODY
+#undef __CLC_GENTYPE
+#undef __CLC_INT_GENTYPE
+#undef __CLC_SCALAR
+
+#define __CLC_GENTYPE float2
+#define __CLC_INT_GENTYPE int2
+#include __CLC_BODY
+#undef __CLC_GENTYPE
+#undef __CLC_INT_GENTYPE
+
+#define __CLC_GENTYPE float3
+#define __CLC_INT_GENTYPE int3
+#include __CLC_BODY
+#undef __CLC_GENTYPE
+#undef __CLC_INT_GENTYPE
+
+#define __CLC_GENTYPE float4
+#define __CLC_INT_GENTYPE int4
+#include __CLC_BODY
+#undef __CLC_GENTYPE
+#undef __CLC_INT_GENTYPE
+
+#define __CLC_GENTYPE float8
+#define __CLC_INT_GENTYPE int8
+#include __CLC_BODY
+#undef __CLC_GENTYPE
+#undef __CLC_INT_GENTYPE
+
+#define __CLC_GENTYPE float16
+#define __CLC_INT_GENTYPE int16
+#include __CLC_BODY
+#undef __CLC_GENTYPE
+#undef __CLC_INT_GENTYPE
+
+#undef __CLC_FPSIZE
+#undef __CLC_SCALAR_GENTYPE
+
+#ifdef cl_khr_fp64
+#define __CLC_SCALAR_GENTYPE double
+#define __CLC_FPSIZE 64
+
+#define __CLC_SCALAR
+#define __CLC_GENTYPE double
+#define __CLC_INT_GENTYPE int
+#include __CLC_BODY
+#undef __CLC_GENTYPE
+#undef __CLC_SCALAR
+#undef __CLC_INT_GENTYPE
+
+#define __CLC_GENTYPE double2
+#define __CLC_INT_GENTYPE int2
+#include __CLC_BODY
+#undef __CLC_GENTYPE
+#undef __CLC_INT_GENTYPE
+
+#define __CLC_GENTYPE double3
+#define __CLC_INT_GENTYPE int3
+#include __CLC_BODY
+#undef __CLC_GENTYPE
+#undef __CLC_INT_GENTYPE
+
+#define __CLC_GENTYPE double4
+#define __CLC_INT_GENTYPE int4
+#include __CLC_BODY
+#undef __CLC_GENTYPE
+#undef __CLC_INT_GENTYPE
+
+#define __CLC_GENTYPE double8
+#define __CLC_INT_GENTYPE int8
+#include __CLC_BODY
+#undef __CLC_GENTYPE
+#undef __CLC_INT_GENTYPE
+
+#define __CLC_GENTYPE double16
+#define __CLC_INT_GENTYPE int16
+#include __CLC_BODY
+#undef __CLC_GENTYPE
+#undef __CLC_INT_GENTYPE
+
+#undef __CLC_FPSIZE
+#undef __CLC_SCALAR_GENTYPE
+#endif
+
+#ifdef __CLC_UNDEF_SCALAR_INT_TYPE
+ #undef __CLC_SCALAR_INT_TYPE
+ #undef __CLC_UNDEF_SCALAR_INT_TYPE
+#endif
+
+#undef __CLC_BODY
diff --git a/generic/include/clc/math/ldexp.h b/generic/include/clc/math/ldexp.h
new file mode 100644
index 0000000..2e3b502
--- /dev/null
+++ b/generic/include/clc/math/ldexp.h
@@ -0,0 +1,9 @@
+#define __CLC_BODY <clc/math/binary_decl.inc>
+#define __CLC_FUNCTION ldexp
+
+#include <clc/math/gentype_tss.inc>
+
+#undef __CLC_BODY
+#undef __CLC_FUNCTION
+
+#undef __CLC_ARG2_BASE_TYPE
\ No newline at end of file
diff --git a/generic/lib/SOURCES b/generic/lib/SOURCES
index 0110e15..be6865e 100644
--- a/generic/lib/SOURCES
+++ b/generic/lib/SOURCES
@@ -70,6 +70,7 @@ math/fmax.cl
math/fmin.cl
math/fmod.cl
math/hypot.cl
+math/ldexp.cl
math/log10.cl
math/log1p.cl
math/mad.cl
diff --git a/generic/lib/clcmacro.h b/generic/lib/clcmacro.h
index 346adf2..3f389e5 100644
--- a/generic/lib/clcmacro.h
+++ b/generic/lib/clcmacro.h
@@ -41,6 +41,28 @@
return (RET_TYPE##16)(FUNCTION(x.lo, y.lo), FUNCTION(x.hi, y.hi)); \
}
+#define _CLC_BINARY_VECTORIZE_SCALAR_SECOND_ARG(DECLSPEC, RET_TYPE, FUNCTION, ARG1_TYPE, ARG2_TYPE) \
+ DECLSPEC RET_TYPE##2 FUNCTION(ARG1_TYPE##2 x, ARG2_TYPE y) { \
+ return (RET_TYPE##2)(FUNCTION(x.x, y), FUNCTION(x.y, y)); \
+ } \
+\
+ DECLSPEC RET_TYPE##3 FUNCTION(ARG1_TYPE##3 x, ARG2_TYPE y) { \
+ return (RET_TYPE##3)(FUNCTION(x.x, y), FUNCTION(x.y, y), \
+ FUNCTION(x.z, y)); \
+ } \
+\
+ DECLSPEC RET_TYPE##4 FUNCTION(ARG1_TYPE##4 x, ARG2_TYPE y) { \
+ return (RET_TYPE##4)(FUNCTION(x.lo, y), FUNCTION(x.hi, y)); \
+ } \
+\
+ DECLSPEC RET_TYPE##8 FUNCTION(ARG1_TYPE##8 x, ARG2_TYPE y) { \
+ return (RET_TYPE##8)(FUNCTION(x.lo, y), FUNCTION(x.hi, y)); \
+ } \
+\
+ DECLSPEC RET_TYPE##16 FUNCTION(ARG1_TYPE##16 x, ARG2_TYPE y) { \
+ return (RET_TYPE##16)(FUNCTION(x.lo, y), FUNCTION(x.hi, y)); \
+ }
+
#define _CLC_V_S_V_VECTORIZE(DECLSPEC, RET_TYPE, FUNCTION, ARG1_TYPE, ARG2_TYPE) \
DECLSPEC RET_TYPE##2 FUNCTION(ARG1_TYPE x, ARG2_TYPE##2 y) { \
return (RET_TYPE##2)(FUNCTION(x, y.lo), FUNCTION(x, y.hi)); \
@@ -115,6 +137,10 @@ _CLC_DEF _CLC_OVERLOAD RET_TYPE FUNCTION(ARG1_TYPE x, ARG2_TYPE y) { \
} \
_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); \
diff --git a/generic/lib/math/ldexp.cl b/generic/lib/math/ldexp.cl
new file mode 100644
index 0000000..b7c5a92
--- /dev/null
+++ b/generic/lib/math/ldexp.cl
@@ -0,0 +1,114 @@
+/*
+ * 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 "../clcmacro.h"
+#include "math.h"
+
+_CLC_DEF _CLC_OVERLOAD float ldexp(float x, int n) {
+ /* 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;
+}
+_CLC_BINARY_VECTORIZE(_CLC_OVERLOAD _CLC_DEF, float, ldexp, float, int)
+_CLC_BINARY_VECTORIZE_SCALAR_SECOND_ARG(_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;
+}
+
+_CLC_BINARY_VECTORIZE(_CLC_OVERLOAD _CLC_DEF, double, ldexp, double, int)
+_CLC_BINARY_VECTORIZE_SCALAR_SECOND_ARG(_CLC_OVERLOAD _CLC_DEF, double, ldexp, double, int)
+
+#endif
--
2.2.0
More information about the Libclc-dev
mailing list