diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/gallium/drivers/llvmpipe/lp_bld_depth.c | 193 |
1 files changed, 82 insertions, 111 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_depth.c b/src/gallium/drivers/llvmpipe/lp_bld_depth.c index 3162f3e1c2e..e4cfa97aa3f 100644 --- a/src/gallium/drivers/llvmpipe/lp_bld_depth.c +++ b/src/gallium/drivers/llvmpipe/lp_bld_depth.c @@ -304,8 +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); @@ -325,9 +330,9 @@ lp_depth_type(const struct util_format_description *format_desc, * in the Z buffer (typically 0xffffff00 or 0x00ffffff). That lets us * get by with fewer bit twiddling steps. */ -static boolean +static void 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; @@ -340,15 +345,16 @@ get_z_shift_and_mask(const struct util_format_description *format_desc, z_swizzle = format_desc->swizzle[0]; - if (z_swizzle == UTIL_FORMAT_SWIZZLE_NONE) - return FALSE; + assert(z_swizzle != UTIL_FORMAT_SWIZZLE_NONE); + + *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; @@ -359,9 +365,7 @@ get_z_shift_and_mask(const struct util_format_description *format_desc, *mask = 0xffffffff; } - *shift = padding_left; - - return TRUE; + *shift = padding_right; } @@ -462,6 +466,7 @@ lp_build_depth_stencil_test(LLVMBuilderRef builder, struct lp_build_context z_bld; struct lp_build_context s_bld; struct lp_type s_type; + unsigned z_shift, z_width, z_mask; LLVMValueRef zs_dst, z_dst = NULL; LLVMValueRef stencil_vals = NULL; LLVMValueRef z_bitmask = NULL, stencil_shift = NULL; @@ -469,67 +474,6 @@ lp_build_depth_stencil_test(LLVMBuilderRef builder, LLVMValueRef orig_mask = lp_build_mask_value(mask); LLVMValueRef front_facing = NULL; - /* Prototype a simpler path: - */ - if (z_src_type.floating && - format_desc->format == PIPE_FORMAT_X8Z24_UNORM && - depth->enabled) - { - LLVMValueRef zscaled; - LLVMValueRef const_ffffff_float; - LLVMValueRef const_8_int; - LLVMTypeRef int32_vec_type; - - /* We know the values in z_dst are all >= 0, so allow - * lp_build_compare to use signed compare intrinsics: - */ - z_type.floating = 0; - z_type.fixed = 0; - z_type.sign = 1; - z_type.norm = 1; - z_type.width = 32; - z_type.length = z_src_type.length; - - int32_vec_type = LLVMVectorType(LLVMInt32Type(), z_src_type.length); - - const_8_int = lp_build_const_int_vec(z_type, 8); - const_ffffff_float = lp_build_const_vec(z_src_type, (float)0xffffff); - - zscaled = LLVMBuildFMul(builder, z_src, const_ffffff_float, "zscaled"); - z_src = LLVMBuildFPToSI(builder, zscaled, int32_vec_type, "z_src"); - - /* Load current z/stencil value from z/stencil buffer */ - zs_dst_ptr = LLVMBuildBitCast(builder, - zs_dst_ptr, - LLVMPointerType(int32_vec_type, 0), ""); - z_dst = LLVMBuildLoad(builder, zs_dst_ptr, "zsbufval"); - z_dst = LLVMBuildLShr(builder, z_dst, const_8_int, "z_dst"); - - /* compare src Z to dst Z, returning 'pass' mask */ - z_pass = lp_build_compare(builder, - z_type, - depth->func, z_src, z_dst); - - lp_build_mask_update(mask, z_pass); - - if (do_branch) - lp_build_mask_check(mask); - - /* No need to worry about old stencil contents, just blend the - * old and new values and shift into the correct position for - * storage. - */ - if (depth->writemask) { - z_type.sign = 1; - lp_build_context_init(&z_bld, builder, z_type); - - z_dst = lp_build_select(&z_bld, lp_build_mask_value(mask), z_src, z_dst); - z_dst = LLVMBuildShl(builder, z_dst, const_8_int, "z_dst"); - *zs_value = z_dst; - } - - return; - } /* * Depths are expected to be between 0 and 1, even if they are stored in @@ -552,10 +496,6 @@ lp_build_depth_stencil_test(LLVMBuilderRef builder, assert(z_type.width == z_src_type.width); assert(z_type.length == z_src_type.length); - /* Convert fragment Z from float to integer */ - lp_build_conv(builder, z_src_type, z_type, &z_src, 1, &z_src, 1); - - /* Sanity checking */ { const unsigned z_swizzle = format_desc->swizzle[0]; @@ -589,8 +529,6 @@ lp_build_depth_stencil_test(LLVMBuilderRef builder, UTIL_FORMAT_TYPE_UNSIGNED); assert(format_desc->channel[z_swizzle].normalized); assert(!z_type.fixed); - assert(!z_type.sign); - assert(z_type.norm); } } @@ -608,34 +546,14 @@ lp_build_depth_stencil_test(LLVMBuilderRef builder, 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(z_type, z_shift); - z_src = LLVMBuildLShr(builder, z_src, shift, ""); - } - - if (z_mask != 0xffffffff) { - LLVMValueRef mask = lp_build_const_int_vec(z_type, z_mask); - z_src = LLVMBuildAnd(builder, z_src, mask, ""); - z_dst = LLVMBuildAnd(builder, zs_dst, mask, ""); - z_bitmask = mask; /* used below */ - } - else { - z_dst = zs_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(s_type, s_shift); @@ -651,7 +569,7 @@ lp_build_depth_stencil_test(LLVMBuilderRef builder, stencil_vals = LLVMBuildAnd(builder, stencil_vals, mask, ""); } - lp_build_name(stencil_vals, "stencil"); + lp_build_name(stencil_vals, "s_dst"); } } @@ -687,6 +605,62 @@ lp_build_depth_stencil_test(LLVMBuilderRef builder, } if (depth->enabled) { + get_z_shift_and_mask(format_desc, &z_shift, &z_width, &z_mask); + + /* + * 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"); + + if (z_mask != 0xffffffff) { + z_bitmask = lp_build_const_int_vec(z_type, z_mask); + } + + /* + * 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) { + z_dst = LLVMBuildAnd(builder, zs_dst, z_bitmask, "z_dst"); + } else { + z_dst = zs_dst; + lp_build_name(z_dst, "z_dst"); + } + /* compare src Z to dst Z, returning 'pass' mask */ z_pass = lp_build_cmp(&z_bld, depth->func, z_src, z_dst); @@ -704,25 +678,20 @@ lp_build_depth_stencil_test(LLVMBuilderRef builder, } if (depth->writemask) { - LLVMValueRef zselectmask = lp_build_mask_value(mask); + 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(&z_bld, zselectmask, z_src, z_dst); + z_dst = lp_build_select(&z_bld, zselectmask, z_src, z_dst); } if (stencil[0].enabled) { @@ -752,9 +721,11 @@ lp_build_depth_stencil_test(LLVMBuilderRef builder, 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(s_bld.builder, stencil_vals, stencil_shift, ""); 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