#include "tgsi/tgsi_util.h"
#include "ac_llvm_util.h"
-static void build_tex_intrinsic(const struct lp_build_tgsi_action *action,
- struct lp_build_tgsi_context *bld_base,
- struct lp_build_emit_data *emit_data);
-
-static const struct lp_build_tgsi_action tex_action;
-
/**
* Given a v8i32 resource descriptor for a buffer, extract the size of the
* buffer in number of elements and return it as an i32.
emit_data->output[emit_data->chan] = fix_resinfo(ctx, target, result);
}
-static void tex_fetch_args(
- struct lp_build_tgsi_context *bld_base,
- struct lp_build_emit_data *emit_data)
+/* Gather4 should follow the same rules as bilinear filtering, but the hardware
+ * incorrectly forces nearest filtering if the texture format is integer.
+ * The only effect it has on Gather4, which always returns 4 texels for
+ * bilinear filtering, is that the final coordinates are off by 0.5 of
+ * the texel size.
+ *
+ * The workaround is to subtract 0.5 from the unnormalized coordinates,
+ * or (0.5 / size) from the normalized coordinates.
+ *
+ * However, cube textures with 8_8_8_8 data formats require a different
+ * workaround of overriding the num format to USCALED/SSCALED. This would lose
+ * precision in 32-bit data formats, so it needs to be applied dynamically at
+ * runtime. In this case, return an i1 value that indicates whether the
+ * descriptor was overridden (and hence a fixup of the sampler result is needed).
+ */
+static LLVMValueRef
+si_lower_gather4_integer(struct si_shader_context *ctx,
+ struct ac_image_args *args,
+ unsigned target,
+ enum tgsi_return_type return_type)
+{
+ LLVMBuilderRef builder = ctx->ac.builder;
+ LLVMValueRef wa_8888 = NULL;
+ LLVMValueRef half_texel[2];
+
+ assert(return_type == TGSI_RETURN_TYPE_SINT ||
+ return_type == TGSI_RETURN_TYPE_UINT);
+
+ if (target == TGSI_TEXTURE_CUBE ||
+ target == TGSI_TEXTURE_CUBE_ARRAY) {
+ LLVMValueRef formats;
+ LLVMValueRef data_format;
+ LLVMValueRef wa_formats;
+
+ formats = LLVMBuildExtractElement(builder, args->resource, ctx->i32_1, "");
+
+ data_format = LLVMBuildLShr(builder, formats,
+ LLVMConstInt(ctx->i32, 20, false), "");
+ data_format = LLVMBuildAnd(builder, data_format,
+ LLVMConstInt(ctx->i32, (1u << 6) - 1, false), "");
+ wa_8888 = LLVMBuildICmp(
+ builder, LLVMIntEQ, data_format,
+ LLVMConstInt(ctx->i32, V_008F14_IMG_DATA_FORMAT_8_8_8_8, false),
+ "");
+
+ uint32_t wa_num_format =
+ return_type == TGSI_RETURN_TYPE_UINT ?
+ S_008F14_NUM_FORMAT_GFX6(V_008F14_IMG_NUM_FORMAT_USCALED) :
+ S_008F14_NUM_FORMAT_GFX6(V_008F14_IMG_NUM_FORMAT_SSCALED);
+ wa_formats = LLVMBuildAnd(builder, formats,
+ LLVMConstInt(ctx->i32, C_008F14_NUM_FORMAT_GFX6, false),
+ "");
+ wa_formats = LLVMBuildOr(builder, wa_formats,
+ LLVMConstInt(ctx->i32, wa_num_format, false), "");
+
+ formats = LLVMBuildSelect(builder, wa_8888, wa_formats, formats, "");
+ args->resource = LLVMBuildInsertElement(
+ builder, args->resource, formats, ctx->i32_1, "");
+ }
+
+ if (target == TGSI_TEXTURE_RECT ||
+ target == TGSI_TEXTURE_SHADOWRECT) {
+ assert(!wa_8888);
+ half_texel[0] = half_texel[1] = LLVMConstReal(ctx->f32, -0.5);
+ } else {
+ struct tgsi_full_instruction txq_inst = {};
+ struct ac_image_args txq_args = {};
+ struct lp_build_emit_data txq_emit_data = {};
+ struct lp_build_if_state if_ctx;
+
+ if (wa_8888) {
+ /* Skip the texture size query entirely if we don't need it. */
+ lp_build_if(&if_ctx, &ctx->gallivm, LLVMBuildNot(builder, wa_8888, ""));
+ }
+
+ /* Query the texture size. */
+ txq_inst.Texture.Texture = target;
+ txq_emit_data.inst = &txq_inst;
+ txq_emit_data.dst_type = ctx->v4i32;
+ txq_args.resource = args->resource;
+ txq_args.sampler = args->sampler;
+ txq_args.lod = ctx->ac.i32_0;
+ txq_args.dmask = 0xf;
+ set_tex_fetch_args(ctx, &txq_emit_data, &txq_args, target);
+ txq_emit(NULL, &ctx->bld_base, &txq_emit_data);
+
+ /* Compute -0.5 / size. */
+ for (unsigned c = 0; c < 2; c++) {
+ half_texel[c] =
+ LLVMBuildExtractElement(builder, txq_emit_data.output[0],
+ LLVMConstInt(ctx->i32, c, 0), "");
+ half_texel[c] = LLVMBuildUIToFP(builder, half_texel[c], ctx->f32, "");
+ half_texel[c] = ac_build_fdiv(&ctx->ac, ctx->ac.f32_1, half_texel[c]);
+ half_texel[c] = LLVMBuildFMul(builder, half_texel[c],
+ LLVMConstReal(ctx->f32, -0.5), "");
+ }
+
+ if (wa_8888) {
+ lp_build_endif(&if_ctx);
+
+ LLVMBasicBlockRef bb[2] = { if_ctx.true_block, if_ctx.entry_block };
+
+ for (unsigned c = 0; c < 2; c++) {
+ LLVMValueRef values[2] = { half_texel[c], ctx->ac.f32_0 };
+ half_texel[c] = ac_build_phi(&ctx->ac, ctx->f32, 2,
+ values, bb);
+ }
+ }
+ }
+
+ for (unsigned c = 0; c < 2; c++) {
+ LLVMValueRef tmp;
+ tmp = ac_to_float(&ctx->ac, args->coords[c]);
+ tmp = LLVMBuildFAdd(builder, tmp, half_texel[c], "");
+ args->coords[c] = ac_to_integer(&ctx->ac, tmp);
+ }
+
+ return wa_8888;
+}
+
+/* The second half of the cube texture 8_8_8_8 integer workaround: adjust the
+ * result after the gather operation.
+ */
+static LLVMValueRef
+si_fix_gather4_integer_result(struct si_shader_context *ctx,
+ LLVMValueRef result,
+ enum tgsi_return_type return_type,
+ LLVMValueRef wa)
+{
+ LLVMBuilderRef builder = ctx->ac.builder;
+
+ assert(return_type == TGSI_RETURN_TYPE_SINT ||
+ return_type == TGSI_RETURN_TYPE_UINT);
+
+ for (unsigned chan = 0; chan < 4; ++chan) {
+ LLVMValueRef chanv = LLVMConstInt(ctx->i32, chan, false);
+ LLVMValueRef value;
+ LLVMValueRef wa_value;
+
+ value = LLVMBuildExtractElement(builder, result, chanv, "");
+
+ if (return_type == TGSI_RETURN_TYPE_UINT)
+ wa_value = LLVMBuildFPToUI(builder, value, ctx->i32, "");
+ else
+ wa_value = LLVMBuildFPToSI(builder, value, ctx->i32, "");
+ wa_value = ac_to_float(&ctx->ac, wa_value);
+ value = LLVMBuildSelect(builder, wa, wa_value, value, "");
+
+ result = LLVMBuildInsertElement(builder, result, value, chanv, "");
+ }
+
+ return result;
+}
+
+static void build_tex_intrinsic(const struct lp_build_tgsi_action *action,
+ struct lp_build_tgsi_context *bld_base,
+ struct lp_build_emit_data *emit_data)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
const struct tgsi_full_instruction *inst = emit_data->inst;
tex_fetch_ptrs(bld_base, emit_data, &args.resource, &args.sampler, &fmask_ptr);
if (target == TGSI_TEXTURE_BUFFER) {
- emit_data->dst_type = ctx->v4f32;
- emit_data->args[0] = args.resource;
- emit_data->args[1] = ctx->i32_0;
- emit_data->args[2] = lp_build_emit_fetch(bld_base, emit_data->inst, 0, TGSI_CHAN_X);
- emit_data->arg_count = 3;
+ LLVMValueRef vindex = lp_build_emit_fetch(bld_base, inst, 0, TGSI_CHAN_X);
+ unsigned num_channels =
+ util_last_bit(inst->Dst[0].Register.WriteMask);
+ LLVMValueRef result =
+ ac_build_buffer_load_format(&ctx->ac,
+ args.resource,
+ vindex,
+ ctx->i32_0,
+ num_channels, false, true);
+ emit_data->output[emit_data->chan] =
+ ac_build_expand_to_vec4(&ctx->ac, result, num_channels);
return;
}
/* Fetch and project texture coordinates */
- args.coords[3] = lp_build_emit_fetch(bld_base, emit_data->inst, 0, TGSI_CHAN_W);
+ args.coords[3] = lp_build_emit_fetch(bld_base, inst, 0, TGSI_CHAN_W);
for (chan = 0; chan < 3; chan++) {
- args.coords[chan] = lp_build_emit_fetch(bld_base,
- emit_data->inst, 0,
- chan);
+ args.coords[chan] = lp_build_emit_fetch(bld_base, inst, 0, chan);
if (opcode == TGSI_OPCODE_TXP)
args.coords[chan] = ac_build_fdiv(&ctx->ac,
args.coords[chan], args.coords[3]);
assert(inst->Texture.NumOffsets == 1);
for (chan = 0; chan < 3; chan++) {
- offset[chan] = lp_build_emit_fetch_texoffset(bld_base,
- emit_data->inst, 0, chan);
+ offset[chan] = lp_build_emit_fetch_texoffset(bld_base, inst, 0, chan);
offset[chan] = LLVMBuildAnd(ctx->ac.builder, offset[chan],
LLVMConstInt(ctx->i32, 0x3f, 0), "");
if (chan)
}
}
- args.dmask = 0xf;
-
if (opcode == TGSI_OPCODE_TG4) {
unsigned gather_comp = 0;
}
args.dmask = 1 << gather_comp;
- }
-
- set_tex_fetch_args(ctx, emit_data, &args, target);
-}
-
-/* Gather4 should follow the same rules as bilinear filtering, but the hardware
- * incorrectly forces nearest filtering if the texture format is integer.
- * The only effect it has on Gather4, which always returns 4 texels for
- * bilinear filtering, is that the final coordinates are off by 0.5 of
- * the texel size.
- *
- * The workaround is to subtract 0.5 from the unnormalized coordinates,
- * or (0.5 / size) from the normalized coordinates.
- *
- * However, cube textures with 8_8_8_8 data formats require a different
- * workaround of overriding the num format to USCALED/SSCALED. This would lose
- * precision in 32-bit data formats, so it needs to be applied dynamically at
- * runtime. In this case, return an i1 value that indicates whether the
- * descriptor was overridden (and hence a fixup of the sampler result is needed).
- */
-static LLVMValueRef
-si_lower_gather4_integer(struct si_shader_context *ctx,
- struct ac_image_args *args,
- unsigned target,
- enum tgsi_return_type return_type)
-{
- LLVMBuilderRef builder = ctx->ac.builder;
- LLVMValueRef wa_8888 = NULL;
- LLVMValueRef half_texel[2];
-
- assert(return_type == TGSI_RETURN_TYPE_SINT ||
- return_type == TGSI_RETURN_TYPE_UINT);
-
- if (target == TGSI_TEXTURE_CUBE ||
- target == TGSI_TEXTURE_CUBE_ARRAY) {
- LLVMValueRef formats;
- LLVMValueRef data_format;
- LLVMValueRef wa_formats;
-
- formats = LLVMBuildExtractElement(builder, args->resource, ctx->i32_1, "");
-
- data_format = LLVMBuildLShr(builder, formats,
- LLVMConstInt(ctx->i32, 20, false), "");
- data_format = LLVMBuildAnd(builder, data_format,
- LLVMConstInt(ctx->i32, (1u << 6) - 1, false), "");
- wa_8888 = LLVMBuildICmp(
- builder, LLVMIntEQ, data_format,
- LLVMConstInt(ctx->i32, V_008F14_IMG_DATA_FORMAT_8_8_8_8, false),
- "");
-
- uint32_t wa_num_format =
- return_type == TGSI_RETURN_TYPE_UINT ?
- S_008F14_NUM_FORMAT_GFX6(V_008F14_IMG_NUM_FORMAT_USCALED) :
- S_008F14_NUM_FORMAT_GFX6(V_008F14_IMG_NUM_FORMAT_SSCALED);
- wa_formats = LLVMBuildAnd(builder, formats,
- LLVMConstInt(ctx->i32, C_008F14_NUM_FORMAT_GFX6, false),
- "");
- wa_formats = LLVMBuildOr(builder, wa_formats,
- LLVMConstInt(ctx->i32, wa_num_format, false), "");
-
- formats = LLVMBuildSelect(builder, wa_8888, wa_formats, formats, "");
- args->resource = LLVMBuildInsertElement(
- builder, args->resource, formats, ctx->i32_1, "");
- }
-
- if (target == TGSI_TEXTURE_RECT ||
- target == TGSI_TEXTURE_SHADOWRECT) {
- assert(!wa_8888);
- half_texel[0] = half_texel[1] = LLVMConstReal(ctx->f32, -0.5);
} else {
- struct tgsi_full_instruction txq_inst = {};
- struct ac_image_args txq_args = {};
- struct lp_build_emit_data txq_emit_data = {};
- struct lp_build_if_state if_ctx;
-
- if (wa_8888) {
- /* Skip the texture size query entirely if we don't need it. */
- lp_build_if(&if_ctx, &ctx->gallivm, LLVMBuildNot(builder, wa_8888, ""));
- }
-
- /* Query the texture size. */
- txq_inst.Texture.Texture = target;
- txq_emit_data.inst = &txq_inst;
- txq_emit_data.dst_type = ctx->v4i32;
- txq_args.resource = args->resource;
- txq_args.sampler = args->sampler;
- txq_args.lod = ctx->ac.i32_0;
- txq_args.dmask = 0xf;
- set_tex_fetch_args(ctx, &txq_emit_data, &txq_args, target);
- txq_emit(NULL, &ctx->bld_base, &txq_emit_data);
-
- /* Compute -0.5 / size. */
- for (unsigned c = 0; c < 2; c++) {
- half_texel[c] =
- LLVMBuildExtractElement(builder, txq_emit_data.output[0],
- LLVMConstInt(ctx->i32, c, 0), "");
- half_texel[c] = LLVMBuildUIToFP(builder, half_texel[c], ctx->f32, "");
- half_texel[c] = ac_build_fdiv(&ctx->ac, ctx->ac.f32_1, half_texel[c]);
- half_texel[c] = LLVMBuildFMul(builder, half_texel[c],
- LLVMConstReal(ctx->f32, -0.5), "");
- }
-
- if (wa_8888) {
- lp_build_endif(&if_ctx);
-
- LLVMBasicBlockRef bb[2] = { if_ctx.true_block, if_ctx.entry_block };
-
- for (unsigned c = 0; c < 2; c++) {
- LLVMValueRef values[2] = { half_texel[c], ctx->ac.f32_0 };
- half_texel[c] = ac_build_phi(&ctx->ac, ctx->f32, 2,
- values, bb);
- }
- }
- }
-
- for (unsigned c = 0; c < 2; c++) {
- LLVMValueRef tmp;
- tmp = ac_to_float(&ctx->ac, args->coords[c]);
- tmp = LLVMBuildFAdd(builder, tmp, half_texel[c], "");
- args->coords[c] = ac_to_integer(&ctx->ac, tmp);
- }
-
- return wa_8888;
-}
-
-/* The second half of the cube texture 8_8_8_8 integer workaround: adjust the
- * result after the gather operation.
- */
-static LLVMValueRef
-si_fix_gather4_integer_result(struct si_shader_context *ctx,
- LLVMValueRef result,
- enum tgsi_return_type return_type,
- LLVMValueRef wa)
-{
- LLVMBuilderRef builder = ctx->ac.builder;
-
- assert(return_type == TGSI_RETURN_TYPE_SINT ||
- return_type == TGSI_RETURN_TYPE_UINT);
-
- for (unsigned chan = 0; chan < 4; ++chan) {
- LLVMValueRef chanv = LLVMConstInt(ctx->i32, chan, false);
- LLVMValueRef value;
- LLVMValueRef wa_value;
-
- value = LLVMBuildExtractElement(builder, result, chanv, "");
-
- if (return_type == TGSI_RETURN_TYPE_UINT)
- wa_value = LLVMBuildFPToUI(builder, value, ctx->i32, "");
- else
- wa_value = LLVMBuildFPToSI(builder, value, ctx->i32, "");
- wa_value = ac_to_float(&ctx->ac, wa_value);
- value = LLVMBuildSelect(builder, wa, wa_value, value, "");
-
- result = LLVMBuildInsertElement(builder, result, value, chanv, "");
- }
-
- return result;
-}
-
-static void build_tex_intrinsic(const struct lp_build_tgsi_action *action,
- struct lp_build_tgsi_context *bld_base,
- struct lp_build_emit_data *emit_data)
-{
- struct si_shader_context *ctx = si_shader_context(bld_base);
- const struct tgsi_full_instruction *inst = emit_data->inst;
- struct ac_image_args args;
- unsigned opcode = inst->Instruction.Opcode;
- unsigned target = inst->Texture.Texture;
-
- if (target == TGSI_TEXTURE_BUFFER) {
- unsigned num_channels =
- util_last_bit(inst->Dst[0].Register.WriteMask);
- LLVMValueRef result =
- ac_build_buffer_load_format(&ctx->ac,
- emit_data->args[0],
- emit_data->args[2],
- emit_data->args[1],
- num_channels, false, true);
- emit_data->output[emit_data->chan] =
- ac_build_expand_to_vec4(&ctx->ac, result, num_channels);
- return;
+ args.dmask = 0xf;
}
- memcpy(&args, emit_data->args, sizeof(args)); /* ugly */
-
+ args.dim = ac_texture_dim_from_tgsi_target(ctx->screen, target);
+ args.unorm = target == TGSI_TEXTURE_RECT ||
+ target == TGSI_TEXTURE_SHADOWRECT;
args.opcode = ac_image_sample;
switch (opcode) {
ac_build_image_opcode(&ctx->ac, &args);
}
-static const struct lp_build_tgsi_action tex_action = {
- .fetch_args = tex_fetch_args,
- .emit = build_tex_intrinsic,
-};
-
/**
* Setup actions for TGSI memory opcode, including texture opcodes.
*/
bld_base = &ctx->bld_base;
- bld_base->op_actions[TGSI_OPCODE_TEX] = tex_action;
- bld_base->op_actions[TGSI_OPCODE_TEX_LZ] = tex_action;
- bld_base->op_actions[TGSI_OPCODE_TEX2] = tex_action;
- bld_base->op_actions[TGSI_OPCODE_TXB] = tex_action;
- bld_base->op_actions[TGSI_OPCODE_TXB2] = tex_action;
- bld_base->op_actions[TGSI_OPCODE_TXD] = tex_action;
- bld_base->op_actions[TGSI_OPCODE_TXF] = tex_action;
- bld_base->op_actions[TGSI_OPCODE_TXF_LZ] = tex_action;
- bld_base->op_actions[TGSI_OPCODE_TXL] = tex_action;
- bld_base->op_actions[TGSI_OPCODE_TXL2] = tex_action;
- bld_base->op_actions[TGSI_OPCODE_TXP] = tex_action;
+ bld_base->op_actions[TGSI_OPCODE_TEX].emit = build_tex_intrinsic;
+ bld_base->op_actions[TGSI_OPCODE_TEX_LZ].emit = build_tex_intrinsic;
+ bld_base->op_actions[TGSI_OPCODE_TEX2].emit = build_tex_intrinsic;
+ bld_base->op_actions[TGSI_OPCODE_TXB].emit = build_tex_intrinsic;
+ bld_base->op_actions[TGSI_OPCODE_TXB2].emit = build_tex_intrinsic;
+ bld_base->op_actions[TGSI_OPCODE_TXD].emit = build_tex_intrinsic;
+ bld_base->op_actions[TGSI_OPCODE_TXF].emit = build_tex_intrinsic;
+ bld_base->op_actions[TGSI_OPCODE_TXF_LZ].emit = build_tex_intrinsic;
+ bld_base->op_actions[TGSI_OPCODE_TXL].emit = build_tex_intrinsic;
+ bld_base->op_actions[TGSI_OPCODE_TXL2].emit = build_tex_intrinsic;
+ bld_base->op_actions[TGSI_OPCODE_TXP].emit = build_tex_intrinsic;
bld_base->op_actions[TGSI_OPCODE_TXQ].fetch_args = txq_fetch_args;
bld_base->op_actions[TGSI_OPCODE_TXQ].emit = txq_emit;
- bld_base->op_actions[TGSI_OPCODE_TG4] = tex_action;
- bld_base->op_actions[TGSI_OPCODE_LODQ] = tex_action;
+ bld_base->op_actions[TGSI_OPCODE_TG4].emit = build_tex_intrinsic;
+ bld_base->op_actions[TGSI_OPCODE_LODQ].emit = build_tex_intrinsic;
bld_base->op_actions[TGSI_OPCODE_TXQS].emit = si_llvm_emit_txqs;
bld_base->op_actions[TGSI_OPCODE_FBFETCH].emit = si_llvm_emit_fbfetch;
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