diff options
author | Christoph Bumiller <e0425955@student.tuwien.ac.at> | 2010-09-02 18:31:49 +0200 |
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committer | Christoph Bumiller <e0425955@student.tuwien.ac.at> | 2010-09-02 18:31:49 +0200 |
commit | 222d2f2ac2c7d93cbc0643082c78278ad2c8cfce (patch) | |
tree | b79152c238022b2a901201c22e5809ac520732bf /src/gallium/auxiliary/gallivm/lp_bld_sample.c | |
parent | 443abc80db9e1a288ce770e76cccd43664348098 (diff) | |
parent | e73c5501b2fe20290d1b691c85a5d82ac3a0431c (diff) |
Merge remote branch 'origin/master' into nv50-compiler
Conflicts:
src/gallium/drivers/nv50/nv50_program.c
Diffstat (limited to 'src/gallium/auxiliary/gallivm/lp_bld_sample.c')
-rw-r--r-- | src/gallium/auxiliary/gallivm/lp_bld_sample.c | 103 |
1 files changed, 68 insertions, 35 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_sample.c b/src/gallium/auxiliary/gallivm/lp_bld_sample.c index 0fd014ab9b..259b1142e3 100644 --- a/src/gallium/auxiliary/gallivm/lp_bld_sample.c +++ b/src/gallium/auxiliary/gallivm/lp_bld_sample.c @@ -82,9 +82,9 @@ lp_sampler_static_state(struct lp_sampler_static_state *state, state->swizzle_a = view->swizzle_a; state->target = texture->target; - state->pot_width = util_is_pot(texture->width0); - state->pot_height = util_is_pot(texture->height0); - state->pot_depth = util_is_pot(texture->depth0); + state->pot_width = util_is_power_of_two(texture->width0); + state->pot_height = util_is_power_of_two(texture->height0); + state->pot_depth = util_is_power_of_two(texture->depth0); state->wrap_s = sampler->wrap_s; state->wrap_t = sampler->wrap_t; @@ -124,6 +124,52 @@ lp_sampler_static_state(struct lp_sampler_static_state *state, /** + * Compute the partial offset of a pixel block along an arbitrary axis. + * + * @param coord coordinate in pixels + * @param stride number of bytes between rows of successive pixel blocks + * @param block_length number of pixels in a pixels block along the coordinate + * axis + * @param out_offset resulting relative offset of the pixel block in bytes + * @param out_subcoord resulting sub-block pixel coordinate + */ +void +lp_build_sample_partial_offset(struct lp_build_context *bld, + unsigned block_length, + LLVMValueRef coord, + LLVMValueRef stride, + LLVMValueRef *out_offset, + LLVMValueRef *out_subcoord) +{ + LLVMValueRef offset; + LLVMValueRef subcoord; + + if (block_length == 1) { + subcoord = bld->zero; + } + else { + /* + * Pixel blocks have power of two dimensions. LLVM should convert the + * rem/div to bit arithmetic. + * TODO: Verify this. + */ + + LLVMValueRef block_width = lp_build_const_int_vec(bld->type, block_length); + subcoord = LLVMBuildURem(bld->builder, coord, block_width, ""); + coord = LLVMBuildUDiv(bld->builder, coord, block_width, ""); + } + + offset = lp_build_mul(bld, coord, stride); + + assert(out_offset); + assert(out_subcoord); + + *out_offset = offset; + *out_subcoord = subcoord; +} + + +/** * Compute the offset of a pixel block. * * x, y, z, y_stride, z_stride are vectors, and they refer to pixels. @@ -144,48 +190,35 @@ lp_build_sample_offset(struct lp_build_context *bld, { LLVMValueRef x_stride; LLVMValueRef offset; - LLVMValueRef i; - LLVMValueRef j; - - /* - * Describe the coordinates in terms of pixel blocks. - * - * TODO: pixel blocks are power of two. LLVM should convert rem/div to - * bit arithmetic. Verify this. - */ - - if (format_desc->block.width == 1) { - i = bld->zero; - } - else { - LLVMValueRef block_width = lp_build_const_int_vec(bld->type, format_desc->block.width); - i = LLVMBuildURem(bld->builder, x, block_width, ""); - x = LLVMBuildUDiv(bld->builder, x, block_width, ""); - } - - if (format_desc->block.height == 1) { - j = bld->zero; - } - else { - LLVMValueRef block_height = lp_build_const_int_vec(bld->type, format_desc->block.height); - j = LLVMBuildURem(bld->builder, y, block_height, ""); - y = LLVMBuildUDiv(bld->builder, y, block_height, ""); - } x_stride = lp_build_const_vec(bld->type, format_desc->block.bits/8); - offset = lp_build_mul(bld, x, x_stride); + + lp_build_sample_partial_offset(bld, + format_desc->block.width, + x, x_stride, + &offset, out_i); if (y && y_stride) { - LLVMValueRef y_offset = lp_build_mul(bld, y, y_stride); + LLVMValueRef y_offset; + lp_build_sample_partial_offset(bld, + format_desc->block.height, + y, y_stride, + &y_offset, out_j); offset = lp_build_add(bld, offset, y_offset); } + else { + *out_j = bld->zero; + } if (z && z_stride) { - LLVMValueRef z_offset = lp_build_mul(bld, z, z_stride); + LLVMValueRef z_offset; + LLVMValueRef k; + lp_build_sample_partial_offset(bld, + 1, /* pixel blocks are always 2D */ + z, z_stride, + &z_offset, &k); offset = lp_build_add(bld, offset, z_offset); } *out_offset = offset; - *out_i = i; - *out_j = j; } |