Author: awatry Date: Thu Aug 15 14:21:07 2013 New Revision: 188476 URL: http://llvm.org/viewvc/llvm-project?rev=188476&view=rev Log: Add hadd builtin
(x + y) >> 1 gets changed to: (x>>1) + (y>>1) + (x&y&1) Saves us having to do any llvm assembly and overflow checking in the addition. Reviewed-by: Tom Stellard <[email protected]> Added: libclc/trunk/generic/include/clc/integer/hadd.h libclc/trunk/generic/include/clc/integer/hadd.inc libclc/trunk/generic/lib/integer/hadd.cl libclc/trunk/generic/lib/integer/hadd.inc Modified: libclc/trunk/generic/include/clc/clc.h libclc/trunk/generic/lib/SOURCES Modified: libclc/trunk/generic/include/clc/clc.h URL: http://llvm.org/viewvc/llvm-project/libclc/trunk/generic/include/clc/clc.h?rev=188476&r1=188475&r2=188476&view=diff ============================================================================== --- libclc/trunk/generic/include/clc/clc.h (original) +++ libclc/trunk/generic/include/clc/clc.h Thu Aug 15 14:21:07 2013 @@ -65,6 +65,7 @@ #include <clc/integer/abs_diff.h> #include <clc/integer/add_sat.h> #include <clc/integer/clz.h> +#include <clc/integer/hadd.h> #include <clc/integer/mad24.h> #include <clc/integer/mul24.h> #include <clc/integer/rotate.h> Added: libclc/trunk/generic/include/clc/integer/hadd.h URL: http://llvm.org/viewvc/llvm-project/libclc/trunk/generic/include/clc/integer/hadd.h?rev=188476&view=auto ============================================================================== --- libclc/trunk/generic/include/clc/integer/hadd.h (added) +++ libclc/trunk/generic/include/clc/integer/hadd.h Thu Aug 15 14:21:07 2013 @@ -0,0 +1,2 @@ +#define __CLC_BODY <clc/integer/hadd.inc> +#include <clc/integer/gentype.inc> Added: libclc/trunk/generic/include/clc/integer/hadd.inc URL: http://llvm.org/viewvc/llvm-project/libclc/trunk/generic/include/clc/integer/hadd.inc?rev=188476&view=auto ============================================================================== --- libclc/trunk/generic/include/clc/integer/hadd.inc (added) +++ libclc/trunk/generic/include/clc/integer/hadd.inc Thu Aug 15 14:21:07 2013 @@ -0,0 +1 @@ +_CLC_OVERLOAD _CLC_DECL __CLC_GENTYPE hadd(__CLC_GENTYPE x, __CLC_GENTYPE y); Modified: libclc/trunk/generic/lib/SOURCES URL: http://llvm.org/viewvc/llvm-project/libclc/trunk/generic/lib/SOURCES?rev=188476&r1=188475&r2=188476&view=diff ============================================================================== --- libclc/trunk/generic/lib/SOURCES (original) +++ libclc/trunk/generic/lib/SOURCES Thu Aug 15 14:21:07 2013 @@ -11,6 +11,7 @@ integer/add_sat_impl.ll integer/clz.cl integer/clz_if.ll integer/clz_impl.ll +integer/hadd.cl integer/mad24.cl integer/mul24.cl integer/rotate.cl Added: libclc/trunk/generic/lib/integer/hadd.cl URL: http://llvm.org/viewvc/llvm-project/libclc/trunk/generic/lib/integer/hadd.cl?rev=188476&view=auto ============================================================================== --- libclc/trunk/generic/lib/integer/hadd.cl (added) +++ libclc/trunk/generic/lib/integer/hadd.cl Thu Aug 15 14:21:07 2013 @@ -0,0 +1,4 @@ +#include <clc/clc.h> + +#define __CLC_BODY <hadd.inc> +#include <clc/integer/gentype.inc> Added: libclc/trunk/generic/lib/integer/hadd.inc URL: http://llvm.org/viewvc/llvm-project/libclc/trunk/generic/lib/integer/hadd.inc?rev=188476&view=auto ============================================================================== --- libclc/trunk/generic/lib/integer/hadd.inc (added) +++ libclc/trunk/generic/lib/integer/hadd.inc Thu Aug 15 14:21:07 2013 @@ -0,0 +1,6 @@ +//hadd = (x+y)>>1 +//This can be simplified to x>>1 + y>>1 + (1 if both x and y have the 1s bit set) +//This saves us having to do any checks for overflow in the addition sum +_CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE hadd(__CLC_GENTYPE x, __CLC_GENTYPE y) { + return (x>>(__CLC_GENTYPE)1)+(y>>(__CLC_GENTYPE)1)+(x&y&(__CLC_GENTYPE)1); +} _______________________________________________ cfe-commits mailing list [email protected] http://lists.cs.uiuc.edu/mailman/listinfo/cfe-commits
