[libclc] 134/291: Implementations for exp(float) and exp(double) v2

[Andreas Beckmann]

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commit 68692023736148c2cca855c21ce37238e81436e7
Author: Jeroen Ketema <j.ketema at imperial.ac.uk>
Date:   Fri Jun 13 09:40:09 2014 +0000

    Implementations for exp(float) and exp(double) v2
    
    Use separate implementations instead of a macro
    to ensure the constant multiplied with is of
    higher precision.
    
    v2: Use the correct formula, spotted by Dan Liew <daniel.liew at imperial.ac.uk>
    
    Reviewed-by: Aaron Warty <awatry at gmail.com>
    Reviewed-by: Tom Stellard <tom at stellard.net>
    
    
    git-svn-id: https://llvm.org/svn/llvm-project/libclc/trunk@210891 91177308-0d34-0410-b5e6-96231b3b80d8
---
 generic/include/clc/math/exp.h       | 9 +++++++--
 generic/include/clc/math/gentype.inc | 4 ++++
 generic/lib/SOURCES                  | 1 +
 3 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/generic/include/clc/math/exp.h b/generic/include/clc/math/exp.h
index dbc4b84..9866524 100644
--- a/generic/include/clc/math/exp.h
+++ b/generic/include/clc/math/exp.h
@@ -1,4 +1,9 @@
 #undef exp
 
-// exp(x) = exp2(x * log2(e)
-#define exp(val) (__clc_exp2((val) * 1.44269504f))
+#define __CLC_BODY <clc/math/unary_decl.inc>
+#define __CLC_FUNCTION exp
+
+#include <clc/math/gentype.inc>
+
+#undef __CLC_BODY
+#undef __CLC_FUNCTION
diff --git a/generic/include/clc/math/gentype.inc b/generic/include/clc/math/gentype.inc
index bff4f56..9f79f6e 100644
--- a/generic/include/clc/math/gentype.inc
+++ b/generic/include/clc/math/gentype.inc
@@ -1,4 +1,5 @@
 #define __CLC_SCALAR_GENTYPE float
+#define __CLC_FPSIZE 32
 
 #define __CLC_GENTYPE float
 #define __CLC_SCALAR
@@ -26,10 +27,12 @@
 #include __CLC_BODY
 #undef __CLC_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
@@ -57,6 +60,7 @@
 #include __CLC_BODY
 #undef __CLC_GENTYPE
 
+#undef __CLC_FPSIZE
 #undef __CLC_SCALAR_GENTYPE
 #endif
 
diff --git a/generic/lib/SOURCES b/generic/lib/SOURCES
index 6ccdf48..a35542c 100644
--- a/generic/lib/SOURCES
+++ b/generic/lib/SOURCES
@@ -27,6 +27,7 @@ integer/sub_sat.cl
 integer/sub_sat_if.ll
 integer/sub_sat_impl.ll
 integer/upsample.cl
+math/exp.cl
 math/fmax.cl
 math/fmin.cl
 math/hypot.cl

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