Author: awatry Date: Thu Aug 15 14:21:10 2013 New Revision: 188477 URL: http://llvm.org/viewvc/llvm-project?rev=188477&view=rev Log: Add rhadd builtin
rhadd = (x+y+1)>>1 Implemented as: (x>>1) + (y>>1) + ((x&1)|(y&1)) This prevents us having to do assembly addition and overflow detection Reviewed-by: Tom Stellard <[email protected]> Added: libclc/trunk/generic/include/clc/integer/rhadd.h libclc/trunk/generic/include/clc/integer/rhadd.inc libclc/trunk/generic/lib/integer/rhadd.cl libclc/trunk/generic/lib/integer/rhadd.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=188477&r1=188476&r2=188477&view=diff ============================================================================== --- libclc/trunk/generic/include/clc/clc.h (original) +++ libclc/trunk/generic/include/clc/clc.h Thu Aug 15 14:21:10 2013 @@ -68,6 +68,7 @@ #include <clc/integer/hadd.h> #include <clc/integer/mad24.h> #include <clc/integer/mul24.h> +#include <clc/integer/rhadd.h> #include <clc/integer/rotate.h> #include <clc/integer/sub_sat.h> #include <clc/integer/upsample.h> Added: libclc/trunk/generic/include/clc/integer/rhadd.h URL: http://llvm.org/viewvc/llvm-project/libclc/trunk/generic/include/clc/integer/rhadd.h?rev=188477&view=auto ============================================================================== --- libclc/trunk/generic/include/clc/integer/rhadd.h (added) +++ libclc/trunk/generic/include/clc/integer/rhadd.h Thu Aug 15 14:21:10 2013 @@ -0,0 +1,2 @@ +#define __CLC_BODY <clc/integer/rhadd.inc> +#include <clc/integer/gentype.inc> Added: libclc/trunk/generic/include/clc/integer/rhadd.inc URL: http://llvm.org/viewvc/llvm-project/libclc/trunk/generic/include/clc/integer/rhadd.inc?rev=188477&view=auto ============================================================================== --- libclc/trunk/generic/include/clc/integer/rhadd.inc (added) +++ libclc/trunk/generic/include/clc/integer/rhadd.inc Thu Aug 15 14:21:10 2013 @@ -0,0 +1 @@ +_CLC_OVERLOAD _CLC_DECL __CLC_GENTYPE rhadd(__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=188477&r1=188476&r2=188477&view=diff ============================================================================== --- libclc/trunk/generic/lib/SOURCES (original) +++ libclc/trunk/generic/lib/SOURCES Thu Aug 15 14:21:10 2013 @@ -14,6 +14,7 @@ integer/clz_impl.ll integer/hadd.cl integer/mad24.cl integer/mul24.cl +integer/rhadd.cl integer/rotate.cl integer/sub_sat.cl integer/sub_sat_if.ll Added: libclc/trunk/generic/lib/integer/rhadd.cl URL: http://llvm.org/viewvc/llvm-project/libclc/trunk/generic/lib/integer/rhadd.cl?rev=188477&view=auto ============================================================================== --- libclc/trunk/generic/lib/integer/rhadd.cl (added) +++ libclc/trunk/generic/lib/integer/rhadd.cl Thu Aug 15 14:21:10 2013 @@ -0,0 +1,4 @@ +#include <clc/clc.h> + +#define __CLC_BODY <rhadd.inc> +#include <clc/integer/gentype.inc> Added: libclc/trunk/generic/lib/integer/rhadd.inc URL: http://llvm.org/viewvc/llvm-project/libclc/trunk/generic/lib/integer/rhadd.inc?rev=188477&view=auto ============================================================================== --- libclc/trunk/generic/lib/integer/rhadd.inc (added) +++ libclc/trunk/generic/lib/integer/rhadd.inc Thu Aug 15 14:21:10 2013 @@ -0,0 +1,6 @@ +//rhadd = (x+y+1)>>1 +//This can be simplified to x>>1 + y>>1 + (1 if either x or y have the 1s bit set) +//This saves us having to do any checks for overflow in the addition sums +_CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE rhadd(__CLC_GENTYPE x, __CLC_GENTYPE y) { + return (x>>(__CLC_GENTYPE)1)+(y>>(__CLC_GENTYPE)1)+((x&(__CLC_GENTYPE)1)|(y&(__CLC_GENTYPE)1)); +} _______________________________________________ cfe-commits mailing list [email protected] http://lists.cs.uiuc.edu/mailman/listinfo/cfe-commits
