[Mesa-dev] [PATCH v3 65/78] i965/ir/vec4: Refactor visit(ir_texture *ir)
Jason Ekstrand
jason at jlekstrand.net
Tue Jul 28 14:50:06 PDT 2015
Reviewed-by: Jason Ekstrand <jason.ekstrand at intel.com>
On Mon, Jul 27, 2015 at 3:26 PM, Alejandro Piñeiro <apinheiro at igalia.com> wrote:
> Splitted in two. The emission is moved to a new vec4_visitor
> method, vec4_visitor::emit_texture, ir order to be reused
> on the nir path.
> ---
>
> v3: removed shadow_compare and has_nonconstant_offset booleans, as
> pointed on the v2 review.
>
> src/mesa/drivers/dri/i965/brw_vec4.h | 14 +
> src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp | 368 +++++++++++++------------
> 2 files changed, 209 insertions(+), 173 deletions(-)
>
> diff --git a/src/mesa/drivers/dri/i965/brw_vec4.h b/src/mesa/drivers/dri/i965/brw_vec4.h
> index 56394af..0f9b3c7 100644
> --- a/src/mesa/drivers/dri/i965/brw_vec4.h
> +++ b/src/mesa/drivers/dri/i965/brw_vec4.h
> @@ -330,6 +330,20 @@ public:
> void emit_pack_unorm_4x8(const dst_reg &dst, const src_reg &src0);
> void emit_pack_snorm_4x8(const dst_reg &dst, const src_reg &src0);
>
> + void emit_texture(ir_texture_opcode op,
> + dst_reg dest,
> + const glsl_type *dest_type,
> + src_reg coordinate,
> + int coord_components,
> + src_reg shadow_comparitor,
> + src_reg lod, src_reg lod2,
> + src_reg sample_index,
> + uint32_t constant_offset,
> + src_reg offset_value,
> + src_reg mcs,
> + bool is_cube_array,
> + uint32_t sampler, src_reg sampler_reg);
> +
> uint32_t gather_channel(unsigned gather_component, uint32_t sampler);
> src_reg emit_mcs_fetch(const glsl_type *coordinate_type, src_reg coordinate,
> src_reg sampler);
> diff --git a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
> index 27bcdfe..0c74e79 100644
> --- a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
> +++ b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
> @@ -2516,6 +2516,183 @@ vec4_visitor::is_high_sampler(src_reg sampler)
> }
>
> void
> +vec4_visitor::emit_texture(ir_texture_opcode op,
> + dst_reg dest,
> + const glsl_type *dest_type,
> + src_reg coordinate,
> + int coord_components,
> + src_reg shadow_comparitor,
> + src_reg lod, src_reg lod2,
> + src_reg sample_index,
> + uint32_t constant_offset,
> + src_reg offset_value,
> + src_reg mcs,
> + bool is_cube_array,
> + uint32_t sampler,
> + src_reg sampler_reg)
> +{
> + enum opcode opcode;
> + switch (op) {
> + case ir_tex: opcode = SHADER_OPCODE_TXL; break;
> + case ir_txl: opcode = SHADER_OPCODE_TXL; break;
> + case ir_txd: opcode = SHADER_OPCODE_TXD; break;
> + case ir_txf: opcode = SHADER_OPCODE_TXF; break;
> + case ir_txf_ms: opcode = SHADER_OPCODE_TXF_CMS; break;
> + case ir_txs: opcode = SHADER_OPCODE_TXS; break;
> + case ir_tg4: opcode = offset_value.file != BAD_FILE
> + ? SHADER_OPCODE_TG4_OFFSET : SHADER_OPCODE_TG4; break;
> + case ir_query_levels: opcode = SHADER_OPCODE_TXS; break;
> + case ir_txb:
> + unreachable("TXB is not valid for vertex shaders.");
> + case ir_lod:
> + unreachable("LOD is not valid for vertex shaders.");
> + default:
> + unreachable("Unrecognized tex op");
> + }
> +
> + vec4_instruction *inst = new(mem_ctx) vec4_instruction(
> + opcode, dst_reg(this, dest_type));
> +
> + inst->offset = constant_offset;
> +
> + /* The message header is necessary for:
> + * - Gen4 (always)
> + * - Gen9+ for selecting SIMD4x2
> + * - Texel offsets
> + * - Gather channel selection
> + * - Sampler indices too large to fit in a 4-bit value.
> + */
> + inst->header_size =
> + (devinfo->gen < 5 || devinfo->gen >= 9 ||
> + inst->offset != 0 || op == ir_tg4 ||
> + is_high_sampler(sampler_reg)) ? 1 : 0;
> + inst->base_mrf = 2;
> + inst->mlen = inst->header_size + 1; /* always at least one */
> + inst->dst.writemask = WRITEMASK_XYZW;
> + inst->shadow_compare = shadow_comparitor.file != BAD_FILE;
> +
> + inst->src[1] = sampler_reg;
> +
> + /* MRF for the first parameter */
> + int param_base = inst->base_mrf + inst->header_size;
> +
> + if (op == ir_txs || op == ir_query_levels) {
> + int writemask = devinfo->gen == 4 ? WRITEMASK_W : WRITEMASK_X;
> + emit(MOV(dst_reg(MRF, param_base, lod.type, writemask), lod));
> + } else {
> + /* Load the coordinate */
> + /* FINISHME: gl_clamp_mask and saturate */
> + int coord_mask = (1 << coord_components) - 1;
> + int zero_mask = 0xf & ~coord_mask;
> +
> + emit(MOV(dst_reg(MRF, param_base, coordinate.type, coord_mask),
> + coordinate));
> +
> + if (zero_mask != 0) {
> + emit(MOV(dst_reg(MRF, param_base, coordinate.type, zero_mask),
> + src_reg(0)));
> + }
> + /* Load the shadow comparitor */
> + if (shadow_comparitor.file != BAD_FILE && op != ir_txd && (op != ir_tg4 || offset_value.file == BAD_FILE)) {
> + emit(MOV(dst_reg(MRF, param_base + 1, shadow_comparitor.type,
> + WRITEMASK_X),
> + shadow_comparitor));
> + inst->mlen++;
> + }
> +
> + /* Load the LOD info */
> + if (op == ir_tex || op == ir_txl) {
> + int mrf, writemask;
> + if (devinfo->gen >= 5) {
> + mrf = param_base + 1;
> + if (shadow_comparitor.file != BAD_FILE) {
> + writemask = WRITEMASK_Y;
> + /* mlen already incremented */
> + } else {
> + writemask = WRITEMASK_X;
> + inst->mlen++;
> + }
> + } else /* devinfo->gen == 4 */ {
> + mrf = param_base;
> + writemask = WRITEMASK_W;
> + }
> + lod.swizzle = BRW_SWIZZLE_XXXX;
> + emit(MOV(dst_reg(MRF, mrf, lod.type, writemask), lod));
> + } else if (op == ir_txf) {
> + emit(MOV(dst_reg(MRF, param_base, lod.type, WRITEMASK_W), lod));
> + } else if (op == ir_txf_ms) {
> + emit(MOV(dst_reg(MRF, param_base + 1, sample_index.type, WRITEMASK_X),
> + sample_index));
> + if (devinfo->gen >= 7) {
> + /* MCS data is in the first channel of `mcs`, but we need to get it into
> + * the .y channel of the second vec4 of params, so replicate .x across
> + * the whole vec4 and then mask off everything except .y
> + */
> + mcs.swizzle = BRW_SWIZZLE_XXXX;
> + emit(MOV(dst_reg(MRF, param_base + 1, glsl_type::uint_type, WRITEMASK_Y),
> + mcs));
> + }
> + inst->mlen++;
> + } else if (op == ir_txd) {
> + const brw_reg_type type = lod.type;
> +
> + if (devinfo->gen >= 5) {
> + lod.swizzle = BRW_SWIZZLE4(SWIZZLE_X,SWIZZLE_X,SWIZZLE_Y,SWIZZLE_Y);
> + lod2.swizzle = BRW_SWIZZLE4(SWIZZLE_X,SWIZZLE_X,SWIZZLE_Y,SWIZZLE_Y);
> + emit(MOV(dst_reg(MRF, param_base + 1, type, WRITEMASK_XZ), lod));
> + emit(MOV(dst_reg(MRF, param_base + 1, type, WRITEMASK_YW), lod2));
> + inst->mlen++;
> +
> + if (dest_type->vector_elements == 3 || shadow_comparitor.file != BAD_FILE) {
> + lod.swizzle = BRW_SWIZZLE_ZZZZ;
> + lod2.swizzle = BRW_SWIZZLE_ZZZZ;
> + emit(MOV(dst_reg(MRF, param_base + 2, type, WRITEMASK_X), lod));
> + emit(MOV(dst_reg(MRF, param_base + 2, type, WRITEMASK_Y), lod2));
> + inst->mlen++;
> +
> + if (shadow_comparitor.file != BAD_FILE) {
> + emit(MOV(dst_reg(MRF, param_base + 2,
> + shadow_comparitor.type, WRITEMASK_Z),
> + shadow_comparitor));
> + }
> + }
> + } else /* devinfo->gen == 4 */ {
> + emit(MOV(dst_reg(MRF, param_base + 1, type, WRITEMASK_XYZ), lod));
> + emit(MOV(dst_reg(MRF, param_base + 2, type, WRITEMASK_XYZ), lod2));
> + inst->mlen += 2;
> + }
> + } else if (op == ir_tg4 && offset_value.file != BAD_FILE) {
> + if (shadow_comparitor.file != BAD_FILE) {
> + emit(MOV(dst_reg(MRF, param_base, shadow_comparitor.type, WRITEMASK_W),
> + shadow_comparitor));
> + }
> +
> + emit(MOV(dst_reg(MRF, param_base + 1, glsl_type::ivec2_type, WRITEMASK_XY),
> + offset_value));
> + inst->mlen++;
> + }
> + }
> +
> + emit(inst);
> +
> + /* fixup num layers (z) for cube arrays: hardware returns faces * layers;
> + * spec requires layers.
> + */
> + if (op == ir_txs && is_cube_array) {
> + emit_math(SHADER_OPCODE_INT_QUOTIENT,
> + writemask(inst->dst, WRITEMASK_Z),
> + src_reg(inst->dst), src_reg(6));
> + }
> +
> + if (devinfo->gen == 6 && op == ir_tg4) {
> + emit_gen6_gather_wa(key->tex.gen6_gather_wa[sampler], inst->dst);
> + }
> +
> + swizzle_result(op, dest,
> + src_reg(inst->dst), sampler, dest_type);
> +}
> +
> +void
> vec4_visitor::visit(ir_texture *ir)
> {
> uint32_t sampler =
> @@ -2580,7 +2757,9 @@ vec4_visitor::visit(ir_texture *ir)
> * generating these values may involve SEND messages that need the MRFs.
> */
> src_reg coordinate;
> + int coord_components = 0;
> if (ir->coordinate) {
> + coord_components = ir->coordinate->type->vector_elements;
> ir->coordinate->accept(this);
> coordinate = this->result;
> }
> @@ -2598,28 +2777,23 @@ vec4_visitor::visit(ir_texture *ir)
> offset_value = src_reg(this->result);
> }
>
> - const glsl_type *lod_type = NULL, *sample_index_type = NULL;
> - src_reg lod, dPdx, dPdy, sample_index, mcs;
> + src_reg lod, lod2, sample_index, mcs;
> switch (ir->op) {
> case ir_tex:
> lod = src_reg(0.0f);
> - lod_type = glsl_type::float_type;
> break;
> case ir_txf:
> case ir_txl:
> case ir_txs:
> ir->lod_info.lod->accept(this);
> lod = this->result;
> - lod_type = ir->lod_info.lod->type;
> break;
> case ir_query_levels:
> lod = src_reg(0);
> - lod_type = glsl_type::int_type;
> break;
> case ir_txf_ms:
> ir->lod_info.sample_index->accept(this);
> sample_index = this->result;
> - sample_index_type = ir->lod_info.sample_index->type;
>
> if (devinfo->gen >= 7 && key->tex.compressed_multisample_layout_mask & (1<<sampler))
> mcs = emit_mcs_fetch(ir->coordinate->type, coordinate, sampler_reg);
> @@ -2628,12 +2802,10 @@ vec4_visitor::visit(ir_texture *ir)
> break;
> case ir_txd:
> ir->lod_info.grad.dPdx->accept(this);
> - dPdx = this->result;
> + lod = this->result;
>
> ir->lod_info.grad.dPdy->accept(this);
> - dPdy = this->result;
> -
> - lod_type = ir->lod_info.grad.dPdx->type;
> + lod2 = this->result;
> break;
> case ir_txb:
> case ir_lod:
> @@ -2641,181 +2813,31 @@ vec4_visitor::visit(ir_texture *ir)
> break;
> }
>
> - enum opcode opcode;
> - switch (ir->op) {
> - case ir_tex: opcode = SHADER_OPCODE_TXL; break;
> - case ir_txl: opcode = SHADER_OPCODE_TXL; break;
> - case ir_txd: opcode = SHADER_OPCODE_TXD; break;
> - case ir_txf: opcode = SHADER_OPCODE_TXF; break;
> - case ir_txf_ms: opcode = SHADER_OPCODE_TXF_CMS; break;
> - case ir_txs: opcode = SHADER_OPCODE_TXS; break;
> - case ir_tg4: opcode = has_nonconstant_offset
> - ? SHADER_OPCODE_TG4_OFFSET : SHADER_OPCODE_TG4; break;
> - case ir_query_levels: opcode = SHADER_OPCODE_TXS; break;
> - case ir_txb:
> - unreachable("TXB is not valid for vertex shaders.");
> - case ir_lod:
> - unreachable("LOD is not valid for vertex shaders.");
> - default:
> - unreachable("Unrecognized tex op");
> - }
> -
> - vec4_instruction *inst = new(mem_ctx) vec4_instruction(
> - opcode, dst_reg(this, ir->type));
> -
> + uint32_t constant_offset = 0;
> if (ir->offset != NULL && !has_nonconstant_offset) {
> - inst->offset =
> + constant_offset =
> brw_texture_offset(ir->offset->as_constant()->value.i,
> ir->offset->type->vector_elements);
> }
>
> /* Stuff the channel select bits in the top of the texture offset */
> if (ir->op == ir_tg4)
> - inst->offset |=
> - gather_channel( ir->lod_info.component->as_constant()->value.i[0],
> - sampler) << 16;
> -
> - /* The message header is necessary for:
> - * - Gen4 (always)
> - * - Gen9+ for selecting SIMD4x2
> - * - Texel offsets
> - * - Gather channel selection
> - * - Sampler indices too large to fit in a 4-bit value.
> - */
> - inst->header_size =
> - (devinfo->gen < 5 || devinfo->gen >= 9 ||
> - inst->offset != 0 || ir->op == ir_tg4 ||
> - is_high_sampler(sampler_reg)) ? 1 : 0;
> - inst->base_mrf = 2;
> - inst->mlen = inst->header_size + 1; /* always at least one */
> - inst->dst.writemask = WRITEMASK_XYZW;
> - inst->shadow_compare = ir->shadow_comparitor != NULL;
> -
> - inst->src[1] = sampler_reg;
> -
> - /* MRF for the first parameter */
> - int param_base = inst->base_mrf + inst->header_size;
> -
> - if (ir->op == ir_txs || ir->op == ir_query_levels) {
> - int writemask = devinfo->gen == 4 ? WRITEMASK_W : WRITEMASK_X;
> - emit(MOV(dst_reg(MRF, param_base, lod_type, writemask), lod));
> - } else {
> - /* Load the coordinate */
> - /* FINISHME: gl_clamp_mask and saturate */
> - int coord_mask = (1 << ir->coordinate->type->vector_elements) - 1;
> - int zero_mask = 0xf & ~coord_mask;
> -
> - emit(MOV(dst_reg(MRF, param_base, ir->coordinate->type, coord_mask),
> - coordinate));
> -
> - if (zero_mask != 0) {
> - emit(MOV(dst_reg(MRF, param_base, ir->coordinate->type, zero_mask),
> - src_reg(0)));
> - }
> - /* Load the shadow comparitor */
> - if (ir->shadow_comparitor && ir->op != ir_txd && (ir->op != ir_tg4 || !has_nonconstant_offset)) {
> - emit(MOV(dst_reg(MRF, param_base + 1, ir->shadow_comparitor->type,
> - WRITEMASK_X),
> - shadow_comparitor));
> - inst->mlen++;
> - }
> -
> - /* Load the LOD info */
> - if (ir->op == ir_tex || ir->op == ir_txl) {
> - int mrf, writemask;
> - if (devinfo->gen >= 5) {
> - mrf = param_base + 1;
> - if (ir->shadow_comparitor) {
> - writemask = WRITEMASK_Y;
> - /* mlen already incremented */
> - } else {
> - writemask = WRITEMASK_X;
> - inst->mlen++;
> - }
> - } else /* devinfo->gen == 4 */ {
> - mrf = param_base;
> - writemask = WRITEMASK_W;
> - }
> - emit(MOV(dst_reg(MRF, mrf, lod_type, writemask), lod));
> - } else if (ir->op == ir_txf) {
> - emit(MOV(dst_reg(MRF, param_base, lod_type, WRITEMASK_W), lod));
> - } else if (ir->op == ir_txf_ms) {
> - emit(MOV(dst_reg(MRF, param_base + 1, sample_index_type, WRITEMASK_X),
> - sample_index));
> - if (devinfo->gen >= 7) {
> - /* MCS data is in the first channel of `mcs`, but we need to get it into
> - * the .y channel of the second vec4 of params, so replicate .x across
> - * the whole vec4 and then mask off everything except .y
> - */
> - mcs.swizzle = BRW_SWIZZLE_XXXX;
> - emit(MOV(dst_reg(MRF, param_base + 1, glsl_type::uint_type, WRITEMASK_Y),
> - mcs));
> - }
> - inst->mlen++;
> - } else if (ir->op == ir_txd) {
> - const glsl_type *type = lod_type;
> -
> - if (devinfo->gen >= 5) {
> - dPdx.swizzle = BRW_SWIZZLE4(SWIZZLE_X,SWIZZLE_X,SWIZZLE_Y,SWIZZLE_Y);
> - dPdy.swizzle = BRW_SWIZZLE4(SWIZZLE_X,SWIZZLE_X,SWIZZLE_Y,SWIZZLE_Y);
> - emit(MOV(dst_reg(MRF, param_base + 1, type, WRITEMASK_XZ), dPdx));
> - emit(MOV(dst_reg(MRF, param_base + 1, type, WRITEMASK_YW), dPdy));
> - inst->mlen++;
> -
> - if (ir->type->vector_elements == 3 || ir->shadow_comparitor) {
> - dPdx.swizzle = BRW_SWIZZLE_ZZZZ;
> - dPdy.swizzle = BRW_SWIZZLE_ZZZZ;
> - emit(MOV(dst_reg(MRF, param_base + 2, type, WRITEMASK_X), dPdx));
> - emit(MOV(dst_reg(MRF, param_base + 2, type, WRITEMASK_Y), dPdy));
> - inst->mlen++;
> + constant_offset |=
> + gather_channel( ir->lod_info.component->as_constant()->value.i[0],
> + sampler) << 16;
>
> - if (ir->shadow_comparitor) {
> - emit(MOV(dst_reg(MRF, param_base + 2,
> - ir->shadow_comparitor->type, WRITEMASK_Z),
> - shadow_comparitor));
> - }
> - }
> - } else /* devinfo->gen == 4 */ {
> - emit(MOV(dst_reg(MRF, param_base + 1, type, WRITEMASK_XYZ), dPdx));
> - emit(MOV(dst_reg(MRF, param_base + 2, type, WRITEMASK_XYZ), dPdy));
> - inst->mlen += 2;
> - }
> - } else if (ir->op == ir_tg4 && has_nonconstant_offset) {
> - if (ir->shadow_comparitor) {
> - emit(MOV(dst_reg(MRF, param_base, ir->shadow_comparitor->type, WRITEMASK_W),
> - shadow_comparitor));
> - }
> -
> - emit(MOV(dst_reg(MRF, param_base + 1, glsl_type::ivec2_type, WRITEMASK_XY),
> - offset_value));
> - inst->mlen++;
> - }
> - }
> -
> - emit(inst);
> -
> - /* fixup num layers (z) for cube arrays: hardware returns faces * layers;
> - * spec requires layers.
> - */
> - if (ir->op == ir_txs) {
> - glsl_type const *type = ir->sampler->type;
> - if (type->sampler_dimensionality == GLSL_SAMPLER_DIM_CUBE &&
> - type->sampler_array) {
> - emit_math(SHADER_OPCODE_INT_QUOTIENT,
> - writemask(inst->dst, WRITEMASK_Z),
> - src_reg(inst->dst), src_reg(6));
> - }
> - }
> -
> - if (devinfo->gen == 6 && ir->op == ir_tg4) {
> - emit_gen6_gather_wa(key->tex.gen6_gather_wa[sampler], inst->dst);
> - }
> + glsl_type const *type = ir->sampler->type;
> + bool is_cube_array = type->sampler_dimensionality == GLSL_SAMPLER_DIM_CUBE &&
> + type->sampler_array;
>
> this->result = src_reg(this, ir->type);
> dst_reg dest = dst_reg(this->result);
>
> - swizzle_result(ir->op, dest, src_reg(inst->dst),
> - sampler, ir->type);
> + emit_texture(ir->op, dest, ir->type, coordinate, coord_components,
> + shadow_comparitor,
> + lod, lod2, sample_index,
> + constant_offset, offset_value,
> + mcs, is_cube_array, sampler, sampler_reg);
> }
>
> /**
> --
> 2.1.0
>
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