diff options
Diffstat (limited to 'src/gallium/drivers/llvmpipe/lp_bld_depth.c')
| -rw-r--r-- | src/gallium/drivers/llvmpipe/lp_bld_depth.c | 412 |
1 files changed, 243 insertions, 169 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_depth.c b/src/gallium/drivers/llvmpipe/lp_bld_depth.c index 7561899a74..7eb76d4fb3 100644 --- a/src/gallium/drivers/llvmpipe/lp_bld_depth.c +++ b/src/gallium/drivers/llvmpipe/lp_bld_depth.c @@ -1,6 +1,6 @@ /************************************************************************** * - * Copyright 2009 VMware, Inc. + * Copyright 2009-2010 VMware, Inc. * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a @@ -53,15 +53,8 @@ * ... ... ... ... ... ... ... ... ... * * - * Stencil test: - * Two-sided stencil test is supported but probably not as efficient as - * it could be. Currently, we use if/then/else constructs to do the - * operations for front vs. back-facing polygons. We could probably do - * both the front and back arithmetic then use a Select() instruction to - * choose the result depending on polyon orientation. We'd have to - * measure performance both ways and see which is better. - * * @author Jose Fonseca <jfonseca@vmware.com> + * @author Brian Paul <jfonseca@vmware.com> */ #include "pipe/p_state.h" @@ -71,6 +64,7 @@ #include "gallivm/lp_bld_arit.h" #include "gallivm/lp_bld_bitarit.h" #include "gallivm/lp_bld_const.h" +#include "gallivm/lp_bld_conv.h" #include "gallivm/lp_bld_logic.h" #include "gallivm/lp_bld_flow.h" #include "gallivm/lp_bld_intr.h" @@ -128,57 +122,32 @@ lp_build_stencil_test_single(struct lp_build_context *bld, /** * Do the one or two-sided stencil test comparison. * \sa lp_build_stencil_test_single - * \param face an integer indicating front (+) or back (-) facing polygon. - * If NULL, assume front-facing. + * \param front_facing an integer vector mask, indicating front (~0) or back + * (0) facing polygon. If NULL, assume front-facing. */ static LLVMValueRef lp_build_stencil_test(struct lp_build_context *bld, const struct pipe_stencil_state stencil[2], LLVMValueRef stencilRefs[2], LLVMValueRef stencilVals, - LLVMValueRef face) + LLVMValueRef front_facing) { LLVMValueRef res; assert(stencil[0].enabled); - if (stencil[1].enabled && face) { - /* do two-sided test */ - struct lp_build_flow_context *flow_ctx; - struct lp_build_if_state if_ctx; - LLVMValueRef front_facing; - LLVMValueRef zero = LLVMConstReal(LLVMFloatType(), 0.0); - LLVMValueRef result = bld->undef; - - flow_ctx = lp_build_flow_create(bld->builder); - lp_build_flow_scope_begin(flow_ctx); + /* do front face test */ + res = lp_build_stencil_test_single(bld, &stencil[0], + stencilRefs[0], stencilVals); - lp_build_flow_scope_declare(flow_ctx, &result); + if (stencil[1].enabled && front_facing) { + /* do back face test */ + LLVMValueRef back_res; - /* front_facing = face > 0.0 */ - front_facing = LLVMBuildFCmp(bld->builder, LLVMRealUGT, face, zero, ""); - - lp_build_if(&if_ctx, flow_ctx, bld->builder, front_facing); - { - result = lp_build_stencil_test_single(bld, &stencil[0], - stencilRefs[0], stencilVals); - } - lp_build_else(&if_ctx); - { - result = lp_build_stencil_test_single(bld, &stencil[1], - stencilRefs[1], stencilVals); - } - lp_build_endif(&if_ctx); + back_res = lp_build_stencil_test_single(bld, &stencil[1], + stencilRefs[1], stencilVals); - lp_build_flow_scope_end(flow_ctx); - lp_build_flow_destroy(flow_ctx); - - res = result; - } - else { - /* do single-side test */ - res = lp_build_stencil_test_single(bld, &stencil[0], - stencilRefs[0], stencilVals); + res = lp_build_select(bld, front_facing, res, back_res); } return res; @@ -195,14 +164,12 @@ lp_build_stencil_op_single(struct lp_build_context *bld, const struct pipe_stencil_state *stencil, enum stencil_op op, LLVMValueRef stencilRef, - LLVMValueRef stencilVals, - LLVMValueRef mask) + LLVMValueRef stencilVals) { - const unsigned stencilMax = 255; /* XXX fix */ struct lp_type type = bld->type; LLVMValueRef res; - LLVMValueRef max = lp_build_const_int_vec(type, stencilMax); + LLVMValueRef max = lp_build_const_int_vec(type, 0xff); unsigned stencil_op; assert(type.sign); @@ -255,19 +222,7 @@ lp_build_stencil_op_single(struct lp_build_context *bld, break; default: assert(0 && "bad stencil op mode"); - res = NULL; - } - - if (stencil->writemask != stencilMax) { - /* mask &= stencil->writemask */ - LLVMValueRef writemask = lp_build_const_int_vec(type, stencil->writemask); - mask = LLVMBuildAnd(bld->builder, mask, writemask, ""); - /* res = (res & mask) | (stencilVals & ~mask) */ - res = lp_build_select_bitwise(bld, writemask, res, stencilVals); - } - else { - /* res = mask ? res : stencilVals */ - res = lp_build_select(bld, mask, res, stencilVals); + res = bld->undef; } return res; @@ -284,49 +239,40 @@ lp_build_stencil_op(struct lp_build_context *bld, LLVMValueRef stencilRefs[2], LLVMValueRef stencilVals, LLVMValueRef mask, - LLVMValueRef face) + LLVMValueRef front_facing) { - assert(stencil[0].enabled); - - if (stencil[1].enabled && face) { - /* do two-sided op */ - struct lp_build_flow_context *flow_ctx; - struct lp_build_if_state if_ctx; - LLVMValueRef front_facing; - LLVMValueRef zero = LLVMConstReal(LLVMFloatType(), 0.0); - LLVMValueRef result = bld->undef; + LLVMValueRef res; - flow_ctx = lp_build_flow_create(bld->builder); - lp_build_flow_scope_begin(flow_ctx); + assert(stencil[0].enabled); - lp_build_flow_scope_declare(flow_ctx, &result); + /* do front face op */ + res = lp_build_stencil_op_single(bld, &stencil[0], op, + stencilRefs[0], stencilVals); - /* front_facing = face > 0.0 */ - front_facing = LLVMBuildFCmp(bld->builder, LLVMRealUGT, face, zero, ""); + if (stencil[1].enabled && front_facing) { + /* do back face op */ + LLVMValueRef back_res; - lp_build_if(&if_ctx, flow_ctx, bld->builder, front_facing); - { - result = lp_build_stencil_op_single(bld, &stencil[0], op, - stencilRefs[0], stencilVals, mask); - } - lp_build_else(&if_ctx); - { - result = lp_build_stencil_op_single(bld, &stencil[1], op, - stencilRefs[1], stencilVals, mask); - } - lp_build_endif(&if_ctx); + back_res = lp_build_stencil_op_single(bld, &stencil[1], op, + stencilRefs[1], stencilVals); - lp_build_flow_scope_end(flow_ctx); - lp_build_flow_destroy(flow_ctx); + res = lp_build_select(bld, front_facing, res, back_res); + } - return result; + if (stencil->writemask != 0xff) { + /* mask &= stencil->writemask */ + LLVMValueRef writemask = lp_build_const_int_vec(bld->type, stencil->writemask); + mask = LLVMBuildAnd(bld->builder, mask, writemask, ""); + /* res = (res & mask) | (stencilVals & ~mask) */ + res = lp_build_select_bitwise(bld, writemask, res, stencilVals); } else { - /* do single-sided op */ - return lp_build_stencil_op_single(bld, &stencil[0], op, - stencilRefs[0], stencilVals, mask); + /* res = mask ? res : stencilVals */ + res = lp_build_select(bld, mask, res, stencilVals); } + + return res; } @@ -358,8 +304,13 @@ lp_depth_type(const struct util_format_description *format_desc, } else if(format_desc->channel[swizzle].type == UTIL_FORMAT_TYPE_UNSIGNED) { assert(format_desc->block.bits <= 32); - if(format_desc->channel[swizzle].normalized) - type.norm = TRUE; + assert(format_desc->channel[swizzle].normalized); + if (format_desc->channel[swizzle].size < format_desc->block.bits) { + /* Prefer signed integers when possible, as SSE has less support + * for unsigned comparison; + */ + type.sign = TRUE; + } } else assert(0); @@ -381,7 +332,7 @@ lp_depth_type(const struct util_format_description *format_desc, */ static boolean get_z_shift_and_mask(const struct util_format_description *format_desc, - unsigned *shift, unsigned *mask) + unsigned *shift, unsigned *width, unsigned *mask) { const unsigned total_bits = format_desc->block.bits; unsigned z_swizzle; @@ -397,12 +348,14 @@ get_z_shift_and_mask(const struct util_format_description *format_desc, if (z_swizzle == UTIL_FORMAT_SWIZZLE_NONE) return FALSE; + *width = format_desc->channel[z_swizzle].size; + padding_right = 0; for (chan = 0; chan < z_swizzle; ++chan) padding_right += format_desc->channel[chan].size; padding_left = - total_bits - (padding_right + format_desc->channel[z_swizzle].size); + total_bits - (padding_right + *width); if (padding_left || padding_right) { unsigned long long mask_left = (1ULL << (total_bits - padding_left)) - 1; @@ -413,7 +366,7 @@ get_z_shift_and_mask(const struct util_format_description *format_desc, *mask = 0xffffffff; } - *shift = padding_left; + *shift = padding_right; return TRUE; } @@ -457,7 +410,7 @@ get_s_shift_and_mask(const struct util_format_description *format_desc, * \param maskvalue is the depth test mask. * \param counter is a pointer of the uint32 counter. */ -static void +void lp_build_occlusion_count(LLVMBuilderRef builder, struct lp_type type, LLVMValueRef maskvalue, @@ -494,31 +447,57 @@ lp_build_occlusion_count(LLVMBuilderRef builder, * \param format_desc description of the depth/stencil surface * \param mask the alive/dead pixel mask for the quad (vector) * \param stencil_refs the front/back stencil ref values (scalar) - * \param z_src the incoming depth/stencil values (a 2x2 quad) + * \param z_src the incoming depth/stencil values (a 2x2 quad, float32) * \param zs_dst_ptr pointer to depth/stencil values in framebuffer - * \param facing contains float value indicating front/back facing polygon + * \param facing contains boolean value indicating front/back facing polygon */ void lp_build_depth_stencil_test(LLVMBuilderRef builder, const struct pipe_depth_state *depth, const struct pipe_stencil_state stencil[2], - struct lp_type type, + struct lp_type z_src_type, const struct util_format_description *format_desc, struct lp_build_mask_context *mask, LLVMValueRef stencil_refs[2], LLVMValueRef z_src, LLVMValueRef zs_dst_ptr, LLVMValueRef face, - LLVMValueRef counter) + LLVMValueRef *zs_value, + boolean do_branch) { - struct lp_build_context bld; - struct lp_build_context sbld; + struct lp_type z_type; + struct lp_build_context z_bld; + struct lp_build_context s_bld; struct lp_type s_type; + unsigned z_shift = 0, z_width = 0, z_mask = 0; LLVMValueRef zs_dst, z_dst = NULL; LLVMValueRef stencil_vals = NULL; LLVMValueRef z_bitmask = NULL, stencil_shift = NULL; LLVMValueRef z_pass = NULL, s_pass_mask = NULL; - LLVMValueRef orig_mask = mask->value; + LLVMValueRef orig_mask = lp_build_mask_value(mask); + LLVMValueRef front_facing = NULL; + + + /* + * Depths are expected to be between 0 and 1, even if they are stored in + * floats. Setting these bits here will ensure that the lp_build_conv() call + * below won't try to unnecessarily clamp the incoming values. + */ + if(z_src_type.floating) { + z_src_type.sign = FALSE; + z_src_type.norm = TRUE; + } + else { + assert(!z_src_type.sign); + assert(z_src_type.norm); + } + + /* Pick the depth type. */ + z_type = lp_depth_type(format_desc, z_src_type.width*z_src_type.length); + + /* FIXME: Cope with a depth test type with a different bit width. */ + assert(z_type.width == z_src_type.width); + assert(z_type.length == z_src_type.length); /* Sanity checking */ { @@ -540,8 +519,8 @@ lp_build_depth_stencil_test(LLVMBuilderRef builder, } assert(z_swizzle < 4); - assert(format_desc->block.bits == type.width); - if (type.floating) { + assert(format_desc->block.bits == z_type.width); + if (z_type.floating) { assert(z_swizzle == 0); assert(format_desc->channel[z_swizzle].type == UTIL_FORMAT_TYPE_FLOAT); @@ -552,54 +531,56 @@ lp_build_depth_stencil_test(LLVMBuilderRef builder, assert(format_desc->channel[z_swizzle].type == UTIL_FORMAT_TYPE_UNSIGNED); assert(format_desc->channel[z_swizzle].normalized); - assert(!type.fixed); - assert(!type.sign); - assert(type.norm); + assert(!z_type.fixed); } } /* Setup build context for Z vals */ - lp_build_context_init(&bld, builder, type); + lp_build_context_init(&z_bld, builder, z_type); /* Setup build context for stencil vals */ - s_type = lp_type_int_vec(type.width); - lp_build_context_init(&sbld, builder, s_type); + s_type = lp_type_int_vec(z_type.width); + lp_build_context_init(&s_bld, builder, s_type); /* Load current z/stencil value from z/stencil buffer */ + zs_dst_ptr = LLVMBuildBitCast(builder, + zs_dst_ptr, + LLVMPointerType(z_bld.vec_type, 0), ""); zs_dst = LLVMBuildLoad(builder, zs_dst_ptr, ""); - lp_build_name(zs_dst, "zsbufval"); + lp_build_name(zs_dst, "zs_dst"); /* Compute and apply the Z/stencil bitmasks and shifts. */ { - unsigned z_shift, z_mask; unsigned s_shift, s_mask; - if (get_z_shift_and_mask(format_desc, &z_shift, &z_mask)) { - if (z_shift) { - LLVMValueRef shift = lp_build_const_int_vec(type, z_shift); - z_src = LLVMBuildLShr(builder, z_src, shift, ""); - } - + if (get_z_shift_and_mask(format_desc, &z_shift, &z_width, &z_mask)) { if (z_mask != 0xffffffff) { - LLVMValueRef mask = lp_build_const_int_vec(type, z_mask); - z_src = LLVMBuildAnd(builder, z_src, mask, ""); - z_dst = LLVMBuildAnd(builder, zs_dst, mask, ""); - z_bitmask = mask; /* used below */ + z_bitmask = lp_build_const_int_vec(z_type, z_mask); } - else { + + /* + * Align the framebuffer Z 's LSB to the right. + */ + if (z_shift) { + LLVMValueRef shift = lp_build_const_int_vec(z_type, z_shift); + z_dst = LLVMBuildLShr(builder, zs_dst, shift, "z_dst"); + } else if (z_bitmask) { + /* TODO: Instead of loading a mask from memory and ANDing, it's + * probably faster to just shake the bits with two shifts. */ + z_dst = LLVMBuildAnd(builder, zs_dst, z_bitmask, "z_dst"); + } else { z_dst = zs_dst; + lp_build_name(z_dst, "z_dst"); } - - lp_build_name(z_dst, "zsbuf.z"); } if (get_s_shift_and_mask(format_desc, &s_shift, &s_mask)) { if (s_shift) { - LLVMValueRef shift = lp_build_const_int_vec(type, s_shift); + LLVMValueRef shift = lp_build_const_int_vec(s_type, s_shift); stencil_vals = LLVMBuildLShr(builder, zs_dst, shift, ""); stencil_shift = shift; /* used below */ } @@ -608,35 +589,85 @@ lp_build_depth_stencil_test(LLVMBuilderRef builder, } if (s_mask != 0xffffffff) { - LLVMValueRef mask = lp_build_const_int_vec(type, s_mask); + LLVMValueRef mask = lp_build_const_int_vec(s_type, s_mask); stencil_vals = LLVMBuildAnd(builder, stencil_vals, mask, ""); } - lp_build_name(stencil_vals, "stencil"); + lp_build_name(stencil_vals, "s_dst"); } } - if (stencil[0].enabled) { + + if (face) { + LLVMValueRef zero = LLVMConstInt(LLVMInt32Type(), 0, 0); + + /* front_facing = face != 0 ? ~0 : 0 */ + front_facing = LLVMBuildICmp(builder, LLVMIntNE, face, zero, ""); + front_facing = LLVMBuildSExt(builder, front_facing, + LLVMIntType(s_bld.type.length*s_bld.type.width), + ""); + front_facing = LLVMBuildBitCast(builder, front_facing, + s_bld.int_vec_type, ""); + } + /* convert scalar stencil refs into vectors */ - stencil_refs[0] = lp_build_broadcast_scalar(&bld, stencil_refs[0]); - stencil_refs[1] = lp_build_broadcast_scalar(&bld, stencil_refs[1]); + stencil_refs[0] = lp_build_broadcast_scalar(&s_bld, stencil_refs[0]); + stencil_refs[1] = lp_build_broadcast_scalar(&s_bld, stencil_refs[1]); - s_pass_mask = lp_build_stencil_test(&sbld, stencil, - stencil_refs, stencil_vals, face); + s_pass_mask = lp_build_stencil_test(&s_bld, stencil, + stencil_refs, stencil_vals, + front_facing); /* apply stencil-fail operator */ { - LLVMValueRef s_fail_mask = lp_build_andnot(&bld, orig_mask, s_pass_mask); - stencil_vals = lp_build_stencil_op(&sbld, stencil, S_FAIL_OP, + LLVMValueRef s_fail_mask = lp_build_andnot(&s_bld, orig_mask, s_pass_mask); + stencil_vals = lp_build_stencil_op(&s_bld, stencil, S_FAIL_OP, stencil_refs, stencil_vals, - s_fail_mask, face); + s_fail_mask, front_facing); } } if (depth->enabled) { + /* + * Convert fragment Z to the desired type, aligning the LSB to the right. + */ + + assert(z_type.width == z_src_type.width); + assert(z_type.length == z_src_type.length); + assert(lp_check_value(z_src_type, z_src)); + if (z_src_type.floating) { + /* + * Convert from floating point values + */ + + if (!z_type.floating) { + z_src = lp_build_clamped_float_to_unsigned_norm(builder, + z_src_type, + z_width, + z_src); + } + } else { + /* + * Convert from unsigned normalized values. + */ + + assert(!z_src_type.sign); + assert(!z_src_type.fixed); + assert(z_src_type.norm); + assert(!z_type.floating); + if (z_src_type.width > z_width) { + LLVMValueRef shift = lp_build_const_int_vec(z_src_type, + z_src_type.width - z_width); + z_src = LLVMBuildLShr(builder, z_src, shift, ""); + } + } + assert(lp_check_value(z_type, z_src)); + + lp_build_name(z_src, "z_src"); + /* compare src Z to dst Z, returning 'pass' mask */ - z_pass = lp_build_cmp(&bld, depth->func, z_src, z_dst); + z_pass = lp_build_cmp(&z_bld, depth->func, z_src, z_dst); if (!stencil[0].enabled) { /* We can potentially skip all remaining operations here, but only @@ -644,28 +675,28 @@ lp_build_depth_stencil_test(LLVMBuilderRef builder, * buffer values. Don't need to update Z buffer values. */ lp_build_mask_update(mask, z_pass); + + if (do_branch) { + lp_build_mask_check(mask); + do_branch = FALSE; + } } if (depth->writemask) { - LLVMValueRef zselectmask = mask->value; + LLVMValueRef zselectmask; /* mask off bits that failed Z test */ - zselectmask = LLVMBuildAnd(builder, zselectmask, z_pass, ""); + zselectmask = LLVMBuildAnd(builder, orig_mask, z_pass, ""); /* mask off bits that failed stencil test */ if (s_pass_mask) { zselectmask = LLVMBuildAnd(builder, zselectmask, s_pass_mask, ""); } - /* if combined Z/stencil format, mask off the stencil bits */ - if (z_bitmask) { - zselectmask = LLVMBuildAnd(builder, zselectmask, z_bitmask, ""); - } - /* Mix the old and new Z buffer values. - * z_dst[i] = (zselectmask[i] & z_src[i]) | (~zselectmask[i] & z_dst[i]) + * z_dst[i] = zselectmask[i] ? z_src[i] : z_dst[i] */ - z_dst = lp_build_select_bitwise(&bld, zselectmask, z_src, z_dst); + z_dst = lp_build_select(&z_bld, zselectmask, z_src, z_dst); } if (stencil[0].enabled) { @@ -673,33 +704,35 @@ lp_build_depth_stencil_test(LLVMBuilderRef builder, LLVMValueRef z_fail_mask, z_pass_mask; /* apply Z-fail operator */ - z_fail_mask = lp_build_andnot(&bld, orig_mask, z_pass); - stencil_vals = lp_build_stencil_op(&sbld, stencil, Z_FAIL_OP, + z_fail_mask = lp_build_andnot(&z_bld, orig_mask, z_pass); + stencil_vals = lp_build_stencil_op(&s_bld, stencil, Z_FAIL_OP, stencil_refs, stencil_vals, - z_fail_mask, face); + z_fail_mask, front_facing); /* apply Z-pass operator */ - z_pass_mask = LLVMBuildAnd(bld.builder, orig_mask, z_pass, ""); - stencil_vals = lp_build_stencil_op(&sbld, stencil, Z_PASS_OP, + z_pass_mask = LLVMBuildAnd(z_bld.builder, orig_mask, z_pass, ""); + stencil_vals = lp_build_stencil_op(&s_bld, stencil, Z_PASS_OP, stencil_refs, stencil_vals, - z_pass_mask, face); + z_pass_mask, front_facing); } } else { /* No depth test: apply Z-pass operator to stencil buffer values which * passed the stencil test. */ - s_pass_mask = LLVMBuildAnd(bld.builder, orig_mask, s_pass_mask, ""); - stencil_vals = lp_build_stencil_op(&sbld, stencil, Z_PASS_OP, + s_pass_mask = LLVMBuildAnd(s_bld.builder, orig_mask, s_pass_mask, ""); + stencil_vals = lp_build_stencil_op(&s_bld, stencil, Z_PASS_OP, stencil_refs, stencil_vals, - s_pass_mask, face); + s_pass_mask, front_facing); } - /* The Z bits are already in the right place but we may need to shift the - * stencil bits before ORing Z with Stencil to make the final pixel value. - */ + /* Put Z and ztencil bits in the right place */ + if (z_dst && z_shift) { + LLVMValueRef shift = lp_build_const_int_vec(z_type, z_shift); + z_dst = LLVMBuildShl(builder, z_dst, shift, ""); + } if (stencil_vals && stencil_shift) - stencil_vals = LLVMBuildShl(bld.builder, stencil_vals, + stencil_vals = LLVMBuildShl(s_bld.builder, stencil_vals, stencil_shift, ""); /* Finally, merge/store the z/stencil values */ @@ -707,13 +740,13 @@ lp_build_depth_stencil_test(LLVMBuilderRef builder, (stencil[0].enabled && stencil[0].writemask)) { if (z_dst && stencil_vals) - zs_dst = LLVMBuildOr(bld.builder, z_dst, stencil_vals, ""); + zs_dst = LLVMBuildOr(z_bld.builder, z_dst, stencil_vals, ""); else if (z_dst) zs_dst = z_dst; else zs_dst = stencil_vals; - LLVMBuildStore(builder, zs_dst, zs_dst_ptr); + *zs_value = zs_dst; } if (s_pass_mask) @@ -722,6 +755,47 @@ lp_build_depth_stencil_test(LLVMBuilderRef builder, if (depth->enabled && stencil[0].enabled) lp_build_mask_update(mask, z_pass); - if (counter) - lp_build_occlusion_count(builder, type, mask->value, counter); + if (do_branch) + lp_build_mask_check(mask); + +} + + +void +lp_build_depth_write(LLVMBuilderRef builder, + const struct util_format_description *format_desc, + LLVMValueRef zs_dst_ptr, + LLVMValueRef zs_value) +{ + zs_dst_ptr = LLVMBuildBitCast(builder, zs_dst_ptr, + LLVMPointerType(LLVMTypeOf(zs_value), 0), ""); + + LLVMBuildStore(builder, zs_value, zs_dst_ptr); +} + + +void +lp_build_deferred_depth_write(LLVMBuilderRef builder, + struct lp_type z_src_type, + const struct util_format_description *format_desc, + struct lp_build_mask_context *mask, + LLVMValueRef zs_dst_ptr, + LLVMValueRef zs_value) +{ + struct lp_type z_type; + struct lp_build_context z_bld; + LLVMValueRef z_dst; + + /* XXX: pointlessly redo type logic: + */ + z_type = lp_depth_type(format_desc, z_src_type.width*z_src_type.length); + lp_build_context_init(&z_bld, builder, z_type); + + zs_dst_ptr = LLVMBuildBitCast(builder, zs_dst_ptr, + LLVMPointerType(z_bld.vec_type, 0), ""); + + z_dst = LLVMBuildLoad(builder, zs_dst_ptr, "zsbufval"); + z_dst = lp_build_select(&z_bld, lp_build_mask_value(mask), zs_value, z_dst); + + LLVMBuildStore(builder, z_dst, zs_dst_ptr); } |