[libclc] 16/92: integer: Add popcount implementation using ctpop intrinsic

[Andreas Boll]

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commit 3ab9165319082ab7b847615ddba8774f3861bd98
Author: Aaron Watry <awatry at gmail.com>
Date:   Sat Sep 9 02:23:54 2017 +0000

    integer: Add popcount implementation using ctpop intrinsic
    
    Also copy/modify the unary_intrin.inc from math/ to make the
    intrinsic declaration somewhat reusable.
    
    Passes CL CTS integer_ops/test_integer_ops popcount tests for CL 1.2
    
    Tested-by on GCN 1.0 (Pitcairn)
    
    Signed-off-by: Aaron Watry <awatry at gmail.com>
    Reviewed-by: Jan Vesely <jan.vesely at rutgers.edu>
    
    git-svn-id: https://llvm.org/svn/llvm-project/libclc/trunk@312854 91177308-0d34-0410-b5e6-96231b3b80d8
---
 generic/include/clc/clc.h                    |  1 +
 generic/include/clc/integer/popcount.h       |  6 ++++++
 generic/include/clc/integer/unary_intrin.inc | 20 ++++++++++++++++++++
 3 files changed, 27 insertions(+)

diff --git a/generic/include/clc/clc.h b/generic/include/clc/clc.h
index 1200511..a93c8ef 100644
--- a/generic/include/clc/clc.h
+++ b/generic/include/clc/clc.h
@@ -126,6 +126,7 @@
 #include <clc/integer/mad_sat.h>
 #include <clc/integer/mul24.h>
 #include <clc/integer/mul_hi.h>
+#include <clc/integer/popcount.h>
 #include <clc/integer/rhadd.h>
 #include <clc/integer/rotate.h>
 #include <clc/integer/sub_sat.h>
diff --git a/generic/include/clc/integer/popcount.h b/generic/include/clc/integer/popcount.h
new file mode 100644
index 0000000..99e4021
--- /dev/null
+++ b/generic/include/clc/integer/popcount.h
@@ -0,0 +1,6 @@
+#undef popcount
+#define popcount __clc_popcount
+
+#define __CLC_FUNCTION __clc_popcount
+#define __CLC_INTRINSIC "llvm.ctpop"
+#include <clc/integer/unary_intrin.inc>
diff --git a/generic/include/clc/integer/unary_intrin.inc b/generic/include/clc/integer/unary_intrin.inc
new file mode 100644
index 0000000..ee9862a
--- /dev/null
+++ b/generic/include/clc/integer/unary_intrin.inc
@@ -0,0 +1,20 @@
+#define __CLC_INTRINSIC_DEF(SCALAR_TYPE, BIT_SIZE) \
+_CLC_OVERLOAD SCALAR_TYPE __CLC_FUNCTION(SCALAR_TYPE x) __asm(__CLC_INTRINSIC ".i" BIT_SIZE); \
+_CLC_OVERLOAD SCALAR_TYPE##2 __CLC_FUNCTION(SCALAR_TYPE##2 x) __asm(__CLC_INTRINSIC ".v2i" BIT_SIZE); \
+_CLC_OVERLOAD SCALAR_TYPE##3 __CLC_FUNCTION(SCALAR_TYPE##3 x) __asm(__CLC_INTRINSIC ".v3i" BIT_SIZE); \
+_CLC_OVERLOAD SCALAR_TYPE##4 __CLC_FUNCTION(SCALAR_TYPE##4 x) __asm(__CLC_INTRINSIC ".v4i" BIT_SIZE); \
+_CLC_OVERLOAD SCALAR_TYPE##8 __CLC_FUNCTION(SCALAR_TYPE##8 x) __asm(__CLC_INTRINSIC ".v8i" BIT_SIZE); \
+_CLC_OVERLOAD SCALAR_TYPE##16 __CLC_FUNCTION(SCALAR_TYPE##16 x) __asm(__CLC_INTRINSIC ".v16i" BIT_SIZE);
+
+__CLC_INTRINSIC_DEF(char, "8")
+__CLC_INTRINSIC_DEF(uchar, "8")
+__CLC_INTRINSIC_DEF(short, "16")
+__CLC_INTRINSIC_DEF(ushort, "16")
+__CLC_INTRINSIC_DEF(int, "32")
+__CLC_INTRINSIC_DEF(uint, "32")
+__CLC_INTRINSIC_DEF(long, "64")
+__CLC_INTRINSIC_DEF(ulong, "64")
+
+#undef __CLC_FUNCTION
+#undef __CLC_INTRINSIC
+#undef __CLC_INTRINSIC_DEF

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