Author: jvesely
Date: Mon Nov 13 10:28:45 2017
New Revision: 318063
URL: http://llvm.org/viewvc/llvm-project?rev=318063&view=rev
Log:
math: Use precomputed constant for log2(10.0)
exp10 CTS fails with or without this change
Reviewer: Jeroen Ketema
Signed-off-by: Jan Vesely <jan.ves...@rutgers.edu>
Modified:
libclc/trunk/generic/include/clc/float/definitions.h
libclc/trunk/generic/lib/math/exp10.inc
libclc/trunk/generic/lib/math/native_exp10.inc
Modified: libclc/trunk/generic/include/clc/float/definitions.h
URL:
http://llvm.org/viewvc/llvm-project/libclc/trunk/generic/include/clc/float/definitions.h?rev=318063&r1=318062&r2=318063&view=diff
==============================================================================
--- libclc/trunk/generic/include/clc/float/definitions.h (original)
+++ libclc/trunk/generic/include/clc/float/definitions.h Mon Nov 13 10:28:45
2017
@@ -31,6 +31,10 @@
#define M_SQRT2_F 0x1.6a09e6p+0f
#define M_SQRT1_2_F 0x1.6a09e6p-1f
+#ifdef __CLC_INTERNAL
+#define M_LOG210_F 0x1.a934f0p+1f
+#endif
+
#ifdef cl_khr_fp64
#define HUGE_VAL __builtin_huge_val()
@@ -59,6 +63,10 @@
#define M_SQRT2 0x1.6a09e667f3bcdp+0
#define M_SQRT1_2 0x1.6a09e667f3bcdp-1
+#ifdef __CLC_INTERNAL
+#define M_LOG210 0x1.a934f0979a371p+1
+#endif
+
#endif
#ifdef cl_khr_fp16
Modified: libclc/trunk/generic/lib/math/exp10.inc
URL:
http://llvm.org/viewvc/llvm-project/libclc/trunk/generic/lib/math/exp10.inc?rev=318063&r1=318062&r2=318063&view=diff
==============================================================================
--- libclc/trunk/generic/lib/math/exp10.inc (original)
+++ libclc/trunk/generic/lib/math/exp10.inc Mon Nov 13 10:28:45 2017
@@ -1,9 +1,9 @@
_CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE exp10(__CLC_GENTYPE val) {
// exp10(x) = exp2(x * log2(10))
#if __CLC_FPSIZE == 32
- return exp2(val * log2(10.0f));
+ return exp2(val * M_LOG210_F);
#elif __CLC_FPSIZE == 64
- return exp2(val * log2(10.0));
+ return exp2(val * M_LOG210);
#else
#error unknown _CLC_FPSIZE
#endif
Modified: libclc/trunk/generic/lib/math/native_exp10.inc
URL:
http://llvm.org/viewvc/llvm-project/libclc/trunk/generic/lib/math/native_exp10.inc?rev=318063&r1=318062&r2=318063&view=diff
==============================================================================
--- libclc/trunk/generic/lib/math/native_exp10.inc (original)
+++ libclc/trunk/generic/lib/math/native_exp10.inc Mon Nov 13 10:28:45 2017
@@ -1,3 +1,3 @@
_CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE native_exp10(__CLC_GENTYPE val) {
- return native_exp2(val * native_log2(10));
+ return native_exp2(val * M_LOG210_F);
}
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