diff options
Diffstat (limited to 'src/gallium/auxiliary/gallivm/lp_bld_arit.c')
-rw-r--r-- | src/gallium/auxiliary/gallivm/lp_bld_arit.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_arit.c b/src/gallium/auxiliary/gallivm/lp_bld_arit.c index f55d2b6d15..90c84c6a4e 100644 --- a/src/gallium/auxiliary/gallivm/lp_bld_arit.c +++ b/src/gallium/auxiliary/gallivm/lp_bld_arit.c @@ -232,6 +232,37 @@ lp_build_add(struct lp_build_context *bld, } +/** Return the sum of the elements of a */ +LLVMValueRef +lp_build_sum_vector(struct lp_build_context *bld, + LLVMValueRef a) +{ + const struct lp_type type = bld->type; + LLVMValueRef index, res; + int i; + + if (a == bld->zero) + return bld->zero; + if (a == bld->undef) + return bld->undef; + assert(type.length > 1); + + assert(!bld->type.norm); + + index = LLVMConstInt(LLVMInt32Type(), 0, 0); + res = LLVMBuildExtractElement(bld->builder, a, index, ""); + + for (i = 1; i < type.length; i++) { + index = LLVMConstInt(LLVMInt32Type(), i, 0); + res = LLVMBuildAdd(bld->builder, res, + LLVMBuildExtractElement(bld->builder, a, index, ""), + ""); + } + + return res; +} + + /** * Generate a - b */ |