diff options
Diffstat (limited to 'src/gallium/auxiliary/gallivm/lp_bld_quad.c')
| -rw-r--r-- | src/gallium/auxiliary/gallivm/lp_bld_quad.c | 87 |
1 files changed, 68 insertions, 19 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_quad.c b/src/gallium/auxiliary/gallivm/lp_bld_quad.c index b0a5bc0..b1ba7c7 100644 --- a/src/gallium/auxiliary/gallivm/lp_bld_quad.c +++ b/src/gallium/auxiliary/gallivm/lp_bld_quad.c @@ -26,6 +26,7 @@ **************************************************************************/ +#include "u_cpu_detect.h" #include "lp_bld_type.h" #include "lp_bld_arit.h" #include "lp_bld_const.h" @@ -77,34 +78,82 @@ lp_build_ddy(struct lp_build_context *bld, return lp_build_sub(bld, a_bottom, a_top); } - +/* + * To be able to handle multiple quads at once in texture sampling and + * do lod calculations per quad, it is necessary to get the per-quad + * derivatives into the lp_build_rho function. + * For 8-wide vectors the packed derivative values for 3 coords would + * look like this, this scales to a arbitrary (multiple of 4) vector size: + * ds1dx ds1dy dt1dx dt1dy ds2dx ds2dy dt2dx dt2dy + * dr1dx dr1dy _____ _____ dr2dx dr2dy _____ _____ + * The second vector will be unused for 1d and 2d textures. + */ LLVMValueRef -lp_build_scalar_ddx(struct lp_build_context *bld, - LLVMValueRef a) +lp_build_packed_ddx_ddy_onecoord(struct lp_build_context *bld, + LLVMValueRef a) { - LLVMBuilderRef builder = bld->gallivm->builder; - LLVMValueRef idx_left = lp_build_const_int32(bld->gallivm, LP_BLD_QUAD_TOP_LEFT); - LLVMValueRef idx_right = lp_build_const_int32(bld->gallivm, LP_BLD_QUAD_TOP_RIGHT); - LLVMValueRef a_left = LLVMBuildExtractElement(builder, a, idx_left, "left"); - LLVMValueRef a_right = LLVMBuildExtractElement(builder, a, idx_right, "right"); + struct gallivm_state *gallivm = bld->gallivm; + LLVMBuilderRef builder = gallivm->builder; + LLVMValueRef vec1, vec2; + + /* same packing as _twocoord, but can use aos swizzle helper */ + + /* + * XXX could make swizzle1 a noop swizzle by using right top/bottom + * pair for ddy + */ + static const unsigned char swizzle1[] = { + LP_BLD_QUAD_TOP_LEFT, LP_BLD_QUAD_TOP_LEFT, + LP_BLD_SWIZZLE_DONTCARE, LP_BLD_SWIZZLE_DONTCARE + }; + static const unsigned char swizzle2[] = { + LP_BLD_QUAD_TOP_RIGHT, LP_BLD_QUAD_BOTTOM_LEFT, + LP_BLD_SWIZZLE_DONTCARE, LP_BLD_SWIZZLE_DONTCARE + }; + + vec1 = lp_build_swizzle_aos(bld, a, swizzle1); + vec2 = lp_build_swizzle_aos(bld, a, swizzle2); + if (bld->type.floating) - return LLVMBuildFSub(builder, a_right, a_left, "ddx"); + return LLVMBuildFSub(builder, vec2, vec1, "ddxddy"); else - return LLVMBuildSub(builder, a_right, a_left, "ddx"); + return LLVMBuildSub(builder, vec2, vec1, "ddxddy"); } LLVMValueRef -lp_build_scalar_ddy(struct lp_build_context *bld, - LLVMValueRef a) +lp_build_packed_ddx_ddy_twocoord(struct lp_build_context *bld, + LLVMValueRef a, LLVMValueRef b) { - LLVMBuilderRef builder = bld->gallivm->builder; - LLVMValueRef idx_top = lp_build_const_int32(bld->gallivm, LP_BLD_QUAD_TOP_LEFT); - LLVMValueRef idx_bottom = lp_build_const_int32(bld->gallivm, LP_BLD_QUAD_BOTTOM_LEFT); - LLVMValueRef a_top = LLVMBuildExtractElement(builder, a, idx_top, "top"); - LLVMValueRef a_bottom = LLVMBuildExtractElement(builder, a, idx_bottom, "bottom"); + struct gallivm_state *gallivm = bld->gallivm; + LLVMBuilderRef builder = gallivm->builder; + LLVMValueRef shuffles1[LP_MAX_VECTOR_LENGTH/4]; + LLVMValueRef shuffles2[LP_MAX_VECTOR_LENGTH/4]; + LLVMValueRef vec1, vec2; + unsigned length, num_quads, i; + + /* XXX: do hsub version */ + length = bld->type.length; + num_quads = length / 4; + for (i = 0; i < num_quads; i++) { + unsigned s1 = 4 * i; + unsigned s2 = 4 * i + length; + shuffles1[4*i + 0] = lp_build_const_int32(gallivm, LP_BLD_QUAD_TOP_LEFT + s1); + shuffles1[4*i + 1] = lp_build_const_int32(gallivm, LP_BLD_QUAD_TOP_LEFT + s1); + shuffles1[4*i + 2] = lp_build_const_int32(gallivm, LP_BLD_QUAD_TOP_LEFT + s2); + shuffles1[4*i + 3] = lp_build_const_int32(gallivm, LP_BLD_QUAD_TOP_LEFT + s2); + shuffles2[4*i + 0] = lp_build_const_int32(gallivm, LP_BLD_QUAD_TOP_RIGHT + s1); + shuffles2[4*i + 1] = lp_build_const_int32(gallivm, LP_BLD_QUAD_BOTTOM_LEFT + s1); + shuffles2[4*i + 2] = lp_build_const_int32(gallivm, LP_BLD_QUAD_TOP_RIGHT + s2); + shuffles2[4*i + 3] = lp_build_const_int32(gallivm, LP_BLD_QUAD_BOTTOM_LEFT + s2); + } + vec1 = LLVMBuildShuffleVector(builder, a, b, + LLVMConstVector(shuffles1, length), ""); + vec2 = LLVMBuildShuffleVector(builder, a, b, + LLVMConstVector(shuffles2, length), ""); if (bld->type.floating) - return LLVMBuildFSub(builder, a_bottom, a_top, "ddy"); + return LLVMBuildFSub(builder, vec2, vec1, "ddxddyddxddy"); else - return LLVMBuildSub(builder, a_bottom, a_top, "ddy"); + return LLVMBuildSub(builder, vec2, vec1, "ddxddyddxddy"); } + |