diff options
Diffstat (limited to 'src/gallium/auxiliary/draw/draw_llvm.c')
| -rw-r--r-- | src/gallium/auxiliary/draw/draw_llvm.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/src/gallium/auxiliary/draw/draw_llvm.c b/src/gallium/auxiliary/draw/draw_llvm.c index 79e7a9b6d12..a3174b404c1 100644 --- a/src/gallium/auxiliary/draw/draw_llvm.c +++ b/src/gallium/auxiliary/draw/draw_llvm.c @@ -707,15 +707,14 @@ generate_fetch(struct gallivm_state *gallivm, if (velem->instance_divisor) { /* Index is equal to the start instance plus the number of current * instance divided by the divisor. In this case we compute it as: - * index = start_instance + ((instance_id - start_instance) / divisor) + * index = start_instance + (instance_id / divisor) */ LLVMValueRef current_instance; index = lp_build_const_int32(gallivm, draw->start_instance); - current_instance = LLVMBuildSub(builder, instance_id, index, ""); - current_instance = LLVMBuildUDiv(builder, current_instance, + current_instance = LLVMBuildUDiv(builder, instance_id, lp_build_const_int32(gallivm, velem->instance_divisor), "instance_divisor"); - index = LLVMBuildAdd(builder, index, current_instance, "instance"); + index = lp_build_uadd_overflow(gallivm, index, current_instance, &ofbit); } stride = lp_build_umul_overflow(gallivm, vb_stride, index, &ofbit); |