diff options
Diffstat (limited to 'src/gallium/auxiliary/gallivm/lp_bld_sample.c')
| -rw-r--r-- | src/gallium/auxiliary/gallivm/lp_bld_sample.c | 24 |
1 files changed, 17 insertions, 7 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_sample.c b/src/gallium/auxiliary/gallivm/lp_bld_sample.c index 311c9f1b9e4..543fd5fea3f 100644 --- a/src/gallium/auxiliary/gallivm/lp_bld_sample.c +++ b/src/gallium/auxiliary/gallivm/lp_bld_sample.c @@ -155,14 +155,16 @@ lp_build_gather(LLVMBuilderRef builder, /** * Compute the offset of a pixel. * - * x, y, y_stride are vectors + * x, y, z, y_stride, z_stride are vectors */ LLVMValueRef lp_build_sample_offset(struct lp_build_context *bld, const struct util_format_description *format_desc, LLVMValueRef x, LLVMValueRef y, - LLVMValueRef y_stride) + LLVMValueRef z, + LLVMValueRef y_stride, + LLVMValueRef z_stride) { LLVMValueRef x_stride; LLVMValueRef offset; @@ -178,6 +180,10 @@ lp_build_sample_offset(struct lp_build_context *bld, LLVMValueRef y_offset_lo, y_offset_hi; LLVMValueRef offset_lo, offset_hi; + /* XXX 1D & 3D addressing not done yet */ + assert(!z); + assert(!z_stride); + x_lo = LLVMBuildAnd(bld->builder, x, bld->one, ""); y_lo = LLVMBuildAnd(bld->builder, y, bld->one, ""); @@ -201,13 +207,17 @@ lp_build_sample_offset(struct lp_build_context *bld, offset = lp_build_add(bld, offset_hi, offset_lo); } else { - LLVMValueRef x_offset; - LLVMValueRef y_offset; + offset = lp_build_mul(bld, x, x_stride); - x_offset = lp_build_mul(bld, x, x_stride); - y_offset = lp_build_mul(bld, y, y_stride); + if (y && y_stride) { + LLVMValueRef y_offset = lp_build_mul(bld, y, y_stride); + offset = lp_build_add(bld, offset, y_offset); + } - offset = lp_build_add(bld, x_offset, y_offset); + if (z && z_stride) { + LLVMValueRef z_offset = lp_build_mul(bld, z, z_stride); + offset = lp_build_add(bld, offset, z_offset); + } } return offset; |