diff options
Diffstat (limited to 'src/gallium/auxiliary/gallivm/lp_bld_sample_aos.c')
| -rw-r--r-- | src/gallium/auxiliary/gallivm/lp_bld_sample_aos.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_sample_aos.c b/src/gallium/auxiliary/gallivm/lp_bld_sample_aos.c index 9a1c693d5e..49a6eed615 100644 --- a/src/gallium/auxiliary/gallivm/lp_bld_sample_aos.c +++ b/src/gallium/auxiliary/gallivm/lp_bld_sample_aos.c @@ -90,10 +90,12 @@ lp_build_sample_wrap_nearest_int(struct lp_build_sample_context *bld, case PIPE_TEX_WRAP_REPEAT: if(is_pot) coord = LLVMBuildAnd(bld->builder, coord, length_minus_one, ""); - else - /* Signed remainder won't give the right results for negative - * dividends but unsigned remainder does.*/ + else { + /* Add a bias to the texcoord to handle negative coords */ + LLVMValueRef bias = lp_build_mul_imm(uint_coord_bld, length, 1024); + coord = LLVMBuildAdd(bld->builder, coord, bias, ""); coord = LLVMBuildURem(bld->builder, coord, length, ""); + } break; case PIPE_TEX_WRAP_CLAMP_TO_EDGE: @@ -197,8 +199,9 @@ lp_build_sample_wrap_linear_int(struct lp_build_sample_context *bld, coord0 = LLVMBuildAnd(bld->builder, coord0, length_minus_one, ""); } else { - /* Signed remainder won't give the right results for negative - * dividends but unsigned remainder does.*/ + /* Add a bias to the texcoord to handle negative coords */ + LLVMValueRef bias = lp_build_mul_imm(uint_coord_bld, length, 1024); + coord0 = LLVMBuildAdd(bld->builder, coord0, bias, ""); coord0 = LLVMBuildURem(bld->builder, coord0, length, ""); } |