union si_shader_part_key *key);
static void si_build_tcs_epilog_function(struct si_shader_context *ctx,
union si_shader_part_key *key);
-static void si_build_ps_prolog_function(struct si_shader_context *ctx,
- union si_shader_part_key *key);
-static void si_build_ps_epilog_function(struct si_shader_context *ctx,
- union si_shader_part_key *key);
static void si_fix_resource_usage(struct si_screen *sscreen,
struct si_shader *shader);
-/* Ideally pass the sample mask input to the PS epilog as v14, which
- * is its usual location, so that the shader doesn't have to add v_mov.
- */
-#define PS_EPILOG_SAMPLEMASK_MIN_LOC 14
-
static bool llvm_type_is_64bit(struct si_shader_context *ctx,
LLVMTypeRef type)
{
}
/** Whether the shader runs on a merged HW stage (LSHS or ESGS) */
-static bool is_merged_shader(struct si_shader_context *ctx)
+bool si_is_merged_shader(struct si_shader_context *ctx)
{
return ctx->shader->key.as_ngg || is_multi_part_shader(ctx);
}
return ac_build_varying_gather_values(&ctx->ac, value, num_components, component);
}
-static LLVMValueRef si_build_fs_interp(struct si_shader_context *ctx,
- unsigned attr_index, unsigned chan,
- LLVMValueRef prim_mask,
- LLVMValueRef i, LLVMValueRef j)
-{
- if (i || j) {
- return ac_build_fs_interp(&ctx->ac,
- LLVMConstInt(ctx->i32, chan, 0),
- LLVMConstInt(ctx->i32, attr_index, 0),
- prim_mask, i, j);
- }
- return ac_build_fs_interp_mov(&ctx->ac,
- LLVMConstInt(ctx->i32, 2, 0), /* P0 */
- LLVMConstInt(ctx->i32, chan, 0),
- LLVMConstInt(ctx->i32, attr_index, 0),
- prim_mask);
-}
-
-/**
- * Interpolate a fragment shader input.
- *
- * @param ctx context
- * @param input_index index of the input in hardware
- * @param semantic_name TGSI_SEMANTIC_*
- * @param semantic_index semantic index
- * @param num_interp_inputs number of all interpolated inputs (= BCOLOR offset)
- * @param colors_read_mask color components read (4 bits for each color, 8 bits in total)
- * @param interp_param interpolation weights (i,j)
- * @param prim_mask SI_PARAM_PRIM_MASK
- * @param face SI_PARAM_FRONT_FACE
- * @param result the return value (4 components)
- */
-static void interp_fs_color(struct si_shader_context *ctx,
- unsigned input_index,
- unsigned semantic_index,
- unsigned num_interp_inputs,
- unsigned colors_read_mask,
- LLVMValueRef interp_param,
- LLVMValueRef prim_mask,
- LLVMValueRef face,
- LLVMValueRef result[4])
-{
- LLVMValueRef i = NULL, j = NULL;
- unsigned chan;
-
- /* fs.constant returns the param from the middle vertex, so it's not
- * really useful for flat shading. It's meant to be used for custom
- * interpolation (but the intrinsic can't fetch from the other two
- * vertices).
- *
- * Luckily, it doesn't matter, because we rely on the FLAT_SHADE state
- * to do the right thing. The only reason we use fs.constant is that
- * fs.interp cannot be used on integers, because they can be equal
- * to NaN.
- *
- * When interp is false we will use fs.constant or for newer llvm,
- * amdgcn.interp.mov.
- */
- bool interp = interp_param != NULL;
-
- if (interp) {
- interp_param = LLVMBuildBitCast(ctx->ac.builder, interp_param,
- LLVMVectorType(ctx->f32, 2), "");
-
- i = LLVMBuildExtractElement(ctx->ac.builder, interp_param,
- ctx->i32_0, "");
- j = LLVMBuildExtractElement(ctx->ac.builder, interp_param,
- ctx->i32_1, "");
- }
-
- if (ctx->shader->key.part.ps.prolog.color_two_side) {
- LLVMValueRef is_face_positive;
-
- /* If BCOLOR0 is used, BCOLOR1 is at offset "num_inputs + 1",
- * otherwise it's at offset "num_inputs".
- */
- unsigned back_attr_offset = num_interp_inputs;
- if (semantic_index == 1 && colors_read_mask & 0xf)
- back_attr_offset += 1;
-
- is_face_positive = LLVMBuildICmp(ctx->ac.builder, LLVMIntNE,
- face, ctx->i32_0, "");
-
- for (chan = 0; chan < 4; chan++) {
- LLVMValueRef front, back;
-
- front = si_build_fs_interp(ctx,
- input_index, chan,
- prim_mask, i, j);
- back = si_build_fs_interp(ctx,
- back_attr_offset, chan,
- prim_mask, i, j);
-
- result[chan] = LLVMBuildSelect(ctx->ac.builder,
- is_face_positive,
- front,
- back,
- "");
- }
- } else {
- for (chan = 0; chan < 4; chan++) {
- result[chan] = si_build_fs_interp(ctx,
- input_index, chan,
- prim_mask, i, j);
- }
- }
-}
-
-LLVMValueRef si_get_sample_id(struct si_shader_context *ctx)
-{
- return si_unpack_param(ctx, ctx->args.ancillary, 8, 4);
-}
-
static LLVMValueRef get_base_vertex(struct ac_shader_abi *abi)
{
struct si_shader_context *ctx = si_shader_context_from_abi(abi);
return result;
}
-/**
- * Load a dword from a constant buffer.
- */
-static LLVMValueRef buffer_load_const(struct si_shader_context *ctx,
- LLVMValueRef resource,
- LLVMValueRef offset)
-{
- return ac_build_buffer_load(&ctx->ac, resource, 1, NULL, offset, NULL,
- 0, 0, true, true);
-}
-
-static LLVMValueRef load_sample_position(struct ac_shader_abi *abi, LLVMValueRef sample_id)
-{
- struct si_shader_context *ctx = si_shader_context_from_abi(abi);
- LLVMValueRef desc = ac_get_arg(&ctx->ac, ctx->rw_buffers);
- LLVMValueRef buf_index = LLVMConstInt(ctx->i32, SI_PS_CONST_SAMPLE_POSITIONS, 0);
- LLVMValueRef resource = ac_build_load_to_sgpr(&ctx->ac, desc, buf_index);
-
- /* offset = sample_id * 8 (8 = 2 floats containing samplepos.xy) */
- LLVMValueRef offset0 = LLVMBuildMul(ctx->ac.builder, sample_id, LLVMConstInt(ctx->i32, 8, 0), "");
- LLVMValueRef offset1 = LLVMBuildAdd(ctx->ac.builder, offset0, LLVMConstInt(ctx->i32, 4, 0), "");
-
- LLVMValueRef pos[4] = {
- buffer_load_const(ctx, resource, offset0),
- buffer_load_const(ctx, resource, offset1),
- LLVMConstReal(ctx->f32, 0),
- LLVMConstReal(ctx->f32, 0)
- };
-
- return ac_build_gather_values(&ctx->ac, pos, 4);
-}
-
-static LLVMValueRef load_sample_mask_in(struct ac_shader_abi *abi)
-{
- struct si_shader_context *ctx = si_shader_context_from_abi(abi);
- return ac_to_integer(&ctx->ac, ac_get_arg(&ctx->ac, ctx->args.sample_coverage));
-}
-
static LLVMValueRef si_load_tess_coord(struct ac_shader_abi *abi)
{
struct si_shader_context *ctx = si_shader_context_from_abi(abi);
offset = semantic_name == TGSI_SEMANTIC_TESS_DEFAULT_INNER_LEVEL ? 4 : 0;
for (i = 0; i < 4; i++)
- val[i] = buffer_load_const(ctx, buf,
- LLVMConstInt(ctx->i32, (offset + i) * 4, 0));
+ val[i] = si_buffer_load_const(ctx, buf,
+ LLVMConstInt(ctx->i32, (offset + i) * 4, 0));
return ac_build_gather_values(&ctx->ac, val, 4);
}
}
/* Initialize arguments for the shader export intrinsic */
-static void si_llvm_init_export_args(struct si_shader_context *ctx,
- LLVMValueRef *values,
- unsigned target,
- struct ac_export_args *args)
-{
- LLVMValueRef f32undef = LLVMGetUndef(ctx->ac.f32);
- unsigned spi_shader_col_format = V_028714_SPI_SHADER_32_ABGR;
- unsigned chan;
- bool is_int8, is_int10;
-
- /* Default is 0xf. Adjusted below depending on the format. */
- args->enabled_channels = 0xf; /* writemask */
-
- /* Specify whether the EXEC mask represents the valid mask */
- args->valid_mask = 0;
-
- /* Specify whether this is the last export */
- args->done = 0;
-
- /* Specify the target we are exporting */
- args->target = target;
-
- if (ctx->type == PIPE_SHADER_FRAGMENT) {
- const struct si_shader_key *key = &ctx->shader->key;
- unsigned col_formats = key->part.ps.epilog.spi_shader_col_format;
- int cbuf = target - V_008DFC_SQ_EXP_MRT;
-
- assert(cbuf >= 0 && cbuf < 8);
- spi_shader_col_format = (col_formats >> (cbuf * 4)) & 0xf;
- is_int8 = (key->part.ps.epilog.color_is_int8 >> cbuf) & 0x1;
- is_int10 = (key->part.ps.epilog.color_is_int10 >> cbuf) & 0x1;
- }
-
+static void si_llvm_init_vs_export_args(struct si_shader_context *ctx,
+ LLVMValueRef *values,
+ unsigned target,
+ struct ac_export_args *args)
+{
+ args->enabled_channels = 0xf; /* writemask - default is 0xf */
+ args->valid_mask = 0; /* Specify whether the EXEC mask represents the valid mask */
+ args->done = 0; /* Specify whether this is the last export */
+ args->target = target; /* Specify the target we are exporting */
args->compr = false;
- args->out[0] = f32undef;
- args->out[1] = f32undef;
- args->out[2] = f32undef;
- args->out[3] = f32undef;
-
- LLVMValueRef (*packf)(struct ac_llvm_context *ctx, LLVMValueRef args[2]) = NULL;
- LLVMValueRef (*packi)(struct ac_llvm_context *ctx, LLVMValueRef args[2],
- unsigned bits, bool hi) = NULL;
-
- switch (spi_shader_col_format) {
- case V_028714_SPI_SHADER_ZERO:
- args->enabled_channels = 0; /* writemask */
- args->target = V_008DFC_SQ_EXP_NULL;
- break;
-
- case V_028714_SPI_SHADER_32_R:
- args->enabled_channels = 1; /* writemask */
- args->out[0] = values[0];
- break;
-
- case V_028714_SPI_SHADER_32_GR:
- args->enabled_channels = 0x3; /* writemask */
- args->out[0] = values[0];
- args->out[1] = values[1];
- break;
-
- case V_028714_SPI_SHADER_32_AR:
- if (ctx->screen->info.chip_class >= GFX10) {
- args->enabled_channels = 0x3; /* writemask */
- args->out[0] = values[0];
- args->out[1] = values[3];
- } else {
- args->enabled_channels = 0x9; /* writemask */
- args->out[0] = values[0];
- args->out[3] = values[3];
- }
- break;
-
- case V_028714_SPI_SHADER_FP16_ABGR:
- packf = ac_build_cvt_pkrtz_f16;
- break;
-
- case V_028714_SPI_SHADER_UNORM16_ABGR:
- packf = ac_build_cvt_pknorm_u16;
- break;
-
- case V_028714_SPI_SHADER_SNORM16_ABGR:
- packf = ac_build_cvt_pknorm_i16;
- break;
-
- case V_028714_SPI_SHADER_UINT16_ABGR:
- packi = ac_build_cvt_pk_u16;
- break;
-
- case V_028714_SPI_SHADER_SINT16_ABGR:
- packi = ac_build_cvt_pk_i16;
- break;
-
- case V_028714_SPI_SHADER_32_ABGR:
- memcpy(&args->out[0], values, sizeof(values[0]) * 4);
- break;
- }
-
- /* Pack f16 or norm_i16/u16. */
- if (packf) {
- for (chan = 0; chan < 2; chan++) {
- LLVMValueRef pack_args[2] = {
- values[2 * chan],
- values[2 * chan + 1]
- };
- LLVMValueRef packed;
-
- packed = packf(&ctx->ac, pack_args);
- args->out[chan] = ac_to_float(&ctx->ac, packed);
- }
- args->compr = 1; /* COMPR flag */
- }
- /* Pack i16/u16. */
- if (packi) {
- for (chan = 0; chan < 2; chan++) {
- LLVMValueRef pack_args[2] = {
- ac_to_integer(&ctx->ac, values[2 * chan]),
- ac_to_integer(&ctx->ac, values[2 * chan + 1])
- };
- LLVMValueRef packed;
-
- packed = packi(&ctx->ac, pack_args,
- is_int8 ? 8 : is_int10 ? 10 : 16,
- chan == 1);
- args->out[chan] = ac_to_float(&ctx->ac, packed);
- }
- args->compr = 1; /* COMPR flag */
- }
-}
-
-static void si_alpha_test(struct si_shader_context *ctx, LLVMValueRef alpha)
-{
- if (ctx->shader->key.part.ps.epilog.alpha_func != PIPE_FUNC_NEVER) {
- static LLVMRealPredicate cond_map[PIPE_FUNC_ALWAYS + 1] = {
- [PIPE_FUNC_LESS] = LLVMRealOLT,
- [PIPE_FUNC_EQUAL] = LLVMRealOEQ,
- [PIPE_FUNC_LEQUAL] = LLVMRealOLE,
- [PIPE_FUNC_GREATER] = LLVMRealOGT,
- [PIPE_FUNC_NOTEQUAL] = LLVMRealONE,
- [PIPE_FUNC_GEQUAL] = LLVMRealOGE,
- };
- LLVMRealPredicate cond = cond_map[ctx->shader->key.part.ps.epilog.alpha_func];
- assert(cond);
-
- LLVMValueRef alpha_ref = LLVMGetParam(ctx->main_fn,
- SI_PARAM_ALPHA_REF);
- LLVMValueRef alpha_pass =
- LLVMBuildFCmp(ctx->ac.builder, cond, alpha, alpha_ref, "");
- ac_build_kill_if_false(&ctx->ac, alpha_pass);
- } else {
- ac_build_kill_if_false(&ctx->ac, ctx->i1false);
- }
-}
-
-static LLVMValueRef si_scale_alpha_by_sample_mask(struct si_shader_context *ctx,
- LLVMValueRef alpha,
- unsigned samplemask_param)
-{
- LLVMValueRef coverage;
-
- /* alpha = alpha * popcount(coverage) / SI_NUM_SMOOTH_AA_SAMPLES */
- coverage = LLVMGetParam(ctx->main_fn,
- samplemask_param);
- coverage = ac_to_integer(&ctx->ac, coverage);
-
- coverage = ac_build_intrinsic(&ctx->ac, "llvm.ctpop.i32",
- ctx->i32,
- &coverage, 1, AC_FUNC_ATTR_READNONE);
- coverage = LLVMBuildUIToFP(ctx->ac.builder, coverage,
- ctx->f32, "");
-
- coverage = LLVMBuildFMul(ctx->ac.builder, coverage,
- LLVMConstReal(ctx->f32,
- 1.0 / SI_NUM_SMOOTH_AA_SAMPLES), "");
-
- return LLVMBuildFMul(ctx->ac.builder, alpha, coverage, "");
+ memcpy(&args->out[0], values, sizeof(values[0]) * 4);
}
static void si_llvm_emit_clipvertex(struct si_shader_context *ctx,
LLVMValueRef addr =
LLVMConstInt(ctx->i32, ((reg_index * 4 + chan) * 4 +
const_chan) * 4, 0);
- base_elt = buffer_load_const(ctx, const_resource,
- addr);
+ base_elt = si_buffer_load_const(ctx, const_resource,
+ addr);
args->out[chan] = ac_build_fmad(&ctx->ac, base_elt,
out_elts[const_chan], args->out[chan]);
}
{
struct ac_export_args args;
- si_llvm_init_export_args(ctx, values,
- V_008DFC_SQ_EXP_PARAM + index, &args);
+ si_llvm_init_vs_export_args(ctx, values,
+ V_008DFC_SQ_EXP_PARAM + index, &args);
ac_build_export(&ctx->ac, &args);
}
for (i = 0; i < noutput; i++) {
switch (outputs[i].semantic_name) {
case TGSI_SEMANTIC_POSITION:
- si_llvm_init_export_args(ctx, outputs[i].values,
- V_008DFC_SQ_EXP_POS, &pos_args[0]);
+ si_llvm_init_vs_export_args(ctx, outputs[i].values,
+ V_008DFC_SQ_EXP_POS, &pos_args[0]);
break;
case TGSI_SEMANTIC_PSIZE:
psize_value = outputs[i].values[0];
case TGSI_SEMANTIC_CLIPDIST:
if (!shader->key.opt.clip_disable) {
unsigned index = 2 + outputs[i].semantic_index;
- si_llvm_init_export_args(ctx, outputs[i].values,
- V_008DFC_SQ_EXP_POS + index,
- &pos_args[index]);
+ si_llvm_init_vs_export_args(ctx, outputs[i].values,
+ V_008DFC_SQ_EXP_POS + index,
+ &pos_args[index]);
}
break;
case TGSI_SEMANTIC_CLIPVERTEX:
ctx->return_value = ret;
}
-struct si_ps_exports {
- unsigned num;
- struct ac_export_args args[10];
-};
-
-static void si_export_mrt_z(struct si_shader_context *ctx,
- LLVMValueRef depth, LLVMValueRef stencil,
- LLVMValueRef samplemask, struct si_ps_exports *exp)
-{
- struct ac_export_args args;
-
- ac_export_mrt_z(&ctx->ac, depth, stencil, samplemask, &args);
-
- memcpy(&exp->args[exp->num++], &args, sizeof(args));
-}
-
-static void si_export_mrt_color(struct si_shader_context *ctx,
- LLVMValueRef *color, unsigned index,
- unsigned samplemask_param,
- bool is_last, struct si_ps_exports *exp)
-{
- int i;
-
- /* Clamp color */
- if (ctx->shader->key.part.ps.epilog.clamp_color)
- for (i = 0; i < 4; i++)
- color[i] = ac_build_clamp(&ctx->ac, color[i]);
-
- /* Alpha to one */
- if (ctx->shader->key.part.ps.epilog.alpha_to_one)
- color[3] = ctx->ac.f32_1;
-
- /* Alpha test */
- if (index == 0 &&
- ctx->shader->key.part.ps.epilog.alpha_func != PIPE_FUNC_ALWAYS)
- si_alpha_test(ctx, color[3]);
-
- /* Line & polygon smoothing */
- if (ctx->shader->key.part.ps.epilog.poly_line_smoothing)
- color[3] = si_scale_alpha_by_sample_mask(ctx, color[3],
- samplemask_param);
-
- /* If last_cbuf > 0, FS_COLOR0_WRITES_ALL_CBUFS is true. */
- if (ctx->shader->key.part.ps.epilog.last_cbuf > 0) {
- struct ac_export_args args[8];
- int c, last = -1;
-
- /* Get the export arguments, also find out what the last one is. */
- for (c = 0; c <= ctx->shader->key.part.ps.epilog.last_cbuf; c++) {
- si_llvm_init_export_args(ctx, color,
- V_008DFC_SQ_EXP_MRT + c, &args[c]);
- if (args[c].enabled_channels)
- last = c;
- }
-
- /* Emit all exports. */
- for (c = 0; c <= ctx->shader->key.part.ps.epilog.last_cbuf; c++) {
- if (is_last && last == c) {
- args[c].valid_mask = 1; /* whether the EXEC mask is valid */
- args[c].done = 1; /* DONE bit */
- } else if (!args[c].enabled_channels)
- continue; /* unnecessary NULL export */
-
- memcpy(&exp->args[exp->num++], &args[c], sizeof(args[c]));
- }
- } else {
- struct ac_export_args args;
-
- /* Export */
- si_llvm_init_export_args(ctx, color, V_008DFC_SQ_EXP_MRT + index,
- &args);
- if (is_last) {
- args.valid_mask = 1; /* whether the EXEC mask is valid */
- args.done = 1; /* DONE bit */
- } else if (!args.enabled_channels)
- return; /* unnecessary NULL export */
-
- memcpy(&exp->args[exp->num++], &args, sizeof(args));
- }
-}
-
-static void si_emit_ps_exports(struct si_shader_context *ctx,
- struct si_ps_exports *exp)
-{
- for (unsigned i = 0; i < exp->num; i++)
- ac_build_export(&ctx->ac, &exp->args[i]);
-}
-
-/**
- * Return PS outputs in this order:
- *
- * v[0:3] = color0.xyzw
- * v[4:7] = color1.xyzw
- * ...
- * vN+0 = Depth
- * vN+1 = Stencil
- * vN+2 = SampleMask
- * vN+3 = SampleMaskIn (used for OpenGL smoothing)
- *
- * The alpha-ref SGPR is returned via its original location.
- */
-static void si_llvm_return_fs_outputs(struct ac_shader_abi *abi,
- unsigned max_outputs,
- LLVMValueRef *addrs)
-{
- struct si_shader_context *ctx = si_shader_context_from_abi(abi);
- struct si_shader *shader = ctx->shader;
- struct si_shader_info *info = &shader->selector->info;
- LLVMBuilderRef builder = ctx->ac.builder;
- unsigned i, j, first_vgpr, vgpr;
-
- LLVMValueRef color[8][4] = {};
- LLVMValueRef depth = NULL, stencil = NULL, samplemask = NULL;
- LLVMValueRef ret;
-
- if (ctx->postponed_kill)
- ac_build_kill_if_false(&ctx->ac, LLVMBuildLoad(builder, ctx->postponed_kill, ""));
-
- /* Read the output values. */
- for (i = 0; i < info->num_outputs; i++) {
- unsigned semantic_name = info->output_semantic_name[i];
- unsigned semantic_index = info->output_semantic_index[i];
-
- switch (semantic_name) {
- case TGSI_SEMANTIC_COLOR:
- assert(semantic_index < 8);
- for (j = 0; j < 4; j++) {
- LLVMValueRef ptr = addrs[4 * i + j];
- LLVMValueRef result = LLVMBuildLoad(builder, ptr, "");
- color[semantic_index][j] = result;
- }
- break;
- case TGSI_SEMANTIC_POSITION:
- depth = LLVMBuildLoad(builder,
- addrs[4 * i + 0], "");
- break;
- case TGSI_SEMANTIC_STENCIL:
- stencil = LLVMBuildLoad(builder,
- addrs[4 * i + 0], "");
- break;
- case TGSI_SEMANTIC_SAMPLEMASK:
- samplemask = LLVMBuildLoad(builder,
- addrs[4 * i + 0], "");
- break;
- default:
- fprintf(stderr, "Warning: GFX6 unhandled fs output type:%d\n",
- semantic_name);
- }
- }
-
- /* Fill the return structure. */
- ret = ctx->return_value;
-
- /* Set SGPRs. */
- ret = LLVMBuildInsertValue(builder, ret,
- ac_to_integer(&ctx->ac,
- LLVMGetParam(ctx->main_fn,
- SI_PARAM_ALPHA_REF)),
- SI_SGPR_ALPHA_REF, "");
-
- /* Set VGPRs */
- first_vgpr = vgpr = SI_SGPR_ALPHA_REF + 1;
- for (i = 0; i < ARRAY_SIZE(color); i++) {
- if (!color[i][0])
- continue;
-
- for (j = 0; j < 4; j++)
- ret = LLVMBuildInsertValue(builder, ret, color[i][j], vgpr++, "");
- }
- if (depth)
- ret = LLVMBuildInsertValue(builder, ret, depth, vgpr++, "");
- if (stencil)
- ret = LLVMBuildInsertValue(builder, ret, stencil, vgpr++, "");
- if (samplemask)
- ret = LLVMBuildInsertValue(builder, ret, samplemask, vgpr++, "");
-
- /* Add the input sample mask for smoothing at the end. */
- if (vgpr < first_vgpr + PS_EPILOG_SAMPLEMASK_MIN_LOC)
- vgpr = first_vgpr + PS_EPILOG_SAMPLEMASK_MIN_LOC;
- ret = LLVMBuildInsertValue(builder, ret,
- LLVMGetParam(ctx->main_fn,
- SI_PARAM_SAMPLE_COVERAGE), vgpr++, "");
-
- ctx->return_value = ret;
-}
-
/* Emit one vertex from the geometry shader */
static void si_llvm_emit_vertex(struct ac_shader_abi *abi,
unsigned stream,
if (num_vbos_in_user_sgprs) {
unsigned user_sgprs = ctx->args.num_sgprs_used;
- if (is_merged_shader(ctx))
+ if (si_is_merged_shader(ctx))
user_sgprs -= 8;
assert(user_sgprs <= SI_SGPR_VS_VB_DESCRIPTOR_FIRST);
SI_SHADER_MERGED_VERTEX_OR_TESSEVAL_GEOMETRY,
};
-static void add_arg_checked(struct ac_shader_args *args,
- enum ac_arg_regfile file,
- unsigned registers, enum ac_arg_type type,
- struct ac_arg *arg,
- unsigned idx)
+void si_add_arg_checked(struct ac_shader_args *args,
+ enum ac_arg_regfile file,
+ unsigned registers, enum ac_arg_type type,
+ struct ac_arg *arg,
+ unsigned idx)
{
assert(args->arg_count == idx);
ac_add_arg(args, file, registers, type, arg);
case PIPE_SHADER_FRAGMENT:
declare_global_desc_pointers(ctx);
declare_per_stage_desc_pointers(ctx, true);
- add_arg_checked(&ctx->args, AC_ARG_SGPR, 1, AC_ARG_INT, NULL,
+ si_add_arg_checked(&ctx->args, AC_ARG_SGPR, 1, AC_ARG_INT, NULL,
SI_PARAM_ALPHA_REF);
- add_arg_checked(&ctx->args, AC_ARG_SGPR, 1, AC_ARG_INT,
+ si_add_arg_checked(&ctx->args, AC_ARG_SGPR, 1, AC_ARG_INT,
&ctx->args.prim_mask, SI_PARAM_PRIM_MASK);
- add_arg_checked(&ctx->args, AC_ARG_VGPR, 2, AC_ARG_INT, &ctx->args.persp_sample,
+ si_add_arg_checked(&ctx->args, AC_ARG_VGPR, 2, AC_ARG_INT, &ctx->args.persp_sample,
SI_PARAM_PERSP_SAMPLE);
- add_arg_checked(&ctx->args, AC_ARG_VGPR, 2, AC_ARG_INT,
+ si_add_arg_checked(&ctx->args, AC_ARG_VGPR, 2, AC_ARG_INT,
&ctx->args.persp_center, SI_PARAM_PERSP_CENTER);
- add_arg_checked(&ctx->args, AC_ARG_VGPR, 2, AC_ARG_INT,
+ si_add_arg_checked(&ctx->args, AC_ARG_VGPR, 2, AC_ARG_INT,
&ctx->args.persp_centroid, SI_PARAM_PERSP_CENTROID);
- add_arg_checked(&ctx->args, AC_ARG_VGPR, 3, AC_ARG_INT,
+ si_add_arg_checked(&ctx->args, AC_ARG_VGPR, 3, AC_ARG_INT,
NULL, SI_PARAM_PERSP_PULL_MODEL);
- add_arg_checked(&ctx->args, AC_ARG_VGPR, 2, AC_ARG_INT,
+ si_add_arg_checked(&ctx->args, AC_ARG_VGPR, 2, AC_ARG_INT,
&ctx->args.linear_sample, SI_PARAM_LINEAR_SAMPLE);
- add_arg_checked(&ctx->args, AC_ARG_VGPR, 2, AC_ARG_INT,
+ si_add_arg_checked(&ctx->args, AC_ARG_VGPR, 2, AC_ARG_INT,
&ctx->args.linear_center, SI_PARAM_LINEAR_CENTER);
- add_arg_checked(&ctx->args, AC_ARG_VGPR, 2, AC_ARG_INT,
+ si_add_arg_checked(&ctx->args, AC_ARG_VGPR, 2, AC_ARG_INT,
&ctx->args.linear_centroid, SI_PARAM_LINEAR_CENTROID);
- add_arg_checked(&ctx->args, AC_ARG_VGPR, 3, AC_ARG_FLOAT,
+ si_add_arg_checked(&ctx->args, AC_ARG_VGPR, 3, AC_ARG_FLOAT,
NULL, SI_PARAM_LINE_STIPPLE_TEX);
- add_arg_checked(&ctx->args, AC_ARG_VGPR, 1, AC_ARG_FLOAT,
+ si_add_arg_checked(&ctx->args, AC_ARG_VGPR, 1, AC_ARG_FLOAT,
&ctx->args.frag_pos[0], SI_PARAM_POS_X_FLOAT);
- add_arg_checked(&ctx->args, AC_ARG_VGPR, 1, AC_ARG_FLOAT,
+ si_add_arg_checked(&ctx->args, AC_ARG_VGPR, 1, AC_ARG_FLOAT,
&ctx->args.frag_pos[1], SI_PARAM_POS_Y_FLOAT);
- add_arg_checked(&ctx->args, AC_ARG_VGPR, 1, AC_ARG_FLOAT,
+ si_add_arg_checked(&ctx->args, AC_ARG_VGPR, 1, AC_ARG_FLOAT,
&ctx->args.frag_pos[2], SI_PARAM_POS_Z_FLOAT);
- add_arg_checked(&ctx->args, AC_ARG_VGPR, 1, AC_ARG_FLOAT,
+ si_add_arg_checked(&ctx->args, AC_ARG_VGPR, 1, AC_ARG_FLOAT,
&ctx->args.frag_pos[3], SI_PARAM_POS_W_FLOAT);
shader->info.face_vgpr_index = ctx->args.num_vgprs_used;
- add_arg_checked(&ctx->args, AC_ARG_VGPR, 1, AC_ARG_INT,
+ si_add_arg_checked(&ctx->args, AC_ARG_VGPR, 1, AC_ARG_INT,
&ctx->args.front_face, SI_PARAM_FRONT_FACE);
shader->info.ancillary_vgpr_index = ctx->args.num_vgprs_used;
- add_arg_checked(&ctx->args, AC_ARG_VGPR, 1, AC_ARG_INT,
+ si_add_arg_checked(&ctx->args, AC_ARG_VGPR, 1, AC_ARG_INT,
&ctx->args.ancillary, SI_PARAM_ANCILLARY);
- add_arg_checked(&ctx->args, AC_ARG_VGPR, 1, AC_ARG_FLOAT,
+ si_add_arg_checked(&ctx->args, AC_ARG_VGPR, 1, AC_ARG_FLOAT,
&ctx->args.sample_coverage, SI_PARAM_SAMPLE_COVERAGE);
- add_arg_checked(&ctx->args, AC_ARG_VGPR, 1, AC_ARG_INT,
+ si_add_arg_checked(&ctx->args, AC_ARG_VGPR, 1, AC_ARG_INT,
&ctx->pos_fixed_pt, SI_PARAM_POS_FIXED_PT);
/* Color inputs from the prolog. */
}
}
-static void si_llvm_emit_polygon_stipple(struct si_shader_context *ctx,
- LLVMValueRef param_rw_buffers,
- struct ac_arg param_pos_fixed_pt)
-{
- LLVMBuilderRef builder = ctx->ac.builder;
- LLVMValueRef slot, desc, offset, row, bit, address[2];
-
- /* Use the fixed-point gl_FragCoord input.
- * Since the stipple pattern is 32x32 and it repeats, just get 5 bits
- * per coordinate to get the repeating effect.
- */
- address[0] = si_unpack_param(ctx, param_pos_fixed_pt, 0, 5);
- address[1] = si_unpack_param(ctx, param_pos_fixed_pt, 16, 5);
-
- /* Load the buffer descriptor. */
- slot = LLVMConstInt(ctx->i32, SI_PS_CONST_POLY_STIPPLE, 0);
- desc = ac_build_load_to_sgpr(&ctx->ac, param_rw_buffers, slot);
-
- /* The stipple pattern is 32x32, each row has 32 bits. */
- offset = LLVMBuildMul(builder, address[1],
- LLVMConstInt(ctx->i32, 4, 0), "");
- row = buffer_load_const(ctx, desc, offset);
- row = ac_to_integer(&ctx->ac, row);
- bit = LLVMBuildLShr(builder, row, address[0], "");
- bit = LLVMBuildTrunc(builder, bit, ctx->i1, "");
- ac_build_kill_if_false(&ctx->ac, bit);
-}
-
/* For the UMR disassembler. */
#define DEBUGGER_END_OF_CODE_MARKER 0xbf9f0000 /* invalid instruction */
#define DEBUGGER_NUM_MARKERS 5
return 0;
}
-static void si_llvm_build_ret(struct si_shader_context *ctx, LLVMValueRef ret)
-{
- if (LLVMGetTypeKind(LLVMTypeOf(ret)) == LLVMVoidTypeKind)
- LLVMBuildRetVoid(ctx->ac.builder);
- else
- LLVMBuildRet(ctx->ac.builder, ret);
-}
-
/* Generate code for the hardware VS shader stage to go with a geometry shader */
struct si_shader *
si_generate_gs_copy_shader(struct si_screen *sscreen,
si_unpack_param(ctx, ctx->merged_wave_info, 8, 8), "");
}
-static void si_llvm_emit_kill(struct ac_shader_abi *abi, LLVMValueRef visible)
-{
- struct si_shader_context *ctx = si_shader_context_from_abi(abi);
- LLVMBuilderRef builder = ctx->ac.builder;
-
- if (ctx->shader->selector->force_correct_derivs_after_kill) {
- /* Kill immediately while maintaining WQM. */
- ac_build_kill_if_false(&ctx->ac,
- ac_build_wqm_vote(&ctx->ac, visible));
-
- LLVMValueRef mask = LLVMBuildLoad(builder, ctx->postponed_kill, "");
- mask = LLVMBuildAnd(builder, mask, visible, "");
- LLVMBuildStore(builder, mask, ctx->postponed_kill);
- return;
- }
-
- ac_build_kill_if_false(&ctx->ac, visible);
-}
-
static bool si_build_main_function(struct si_shader_context *ctx,
struct nir_shader *nir, bool free_nir)
{
struct si_shader *shader = ctx->shader;
struct si_shader_selector *sel = shader->selector;
- // TODO clean all this up!
switch (ctx->type) {
case PIPE_SHADER_VERTEX:
if (shader->key.as_ls)
ctx->abi.emit_outputs = si_llvm_emit_gs_epilogue;
break;
case PIPE_SHADER_FRAGMENT:
- ctx->abi.emit_outputs = si_llvm_return_fs_outputs;
- ctx->abi.load_sample_position = load_sample_position;
- ctx->abi.load_sample_mask_in = load_sample_mask_in;
- ctx->abi.emit_fbfetch = si_nir_emit_fbfetch;
- ctx->abi.emit_kill = si_llvm_emit_kill;
+ si_llvm_init_ps_callbacks(ctx);
break;
case PIPE_SHADER_COMPUTE:
ctx->abi.load_local_group_size = get_block_size;
}
/**
- * Compute the PS prolog key, which contains all the information needed to
- * build the PS prolog function, and set related bits in shader->config.
+ * Build the GS prolog function. Rotate the input vertices for triangle strips
+ * with adjacency.
*/
-static void si_get_ps_prolog_key(struct si_shader *shader,
- union si_shader_part_key *key,
- bool separate_prolog)
+static void si_build_gs_prolog_function(struct si_shader_context *ctx,
+ union si_shader_part_key *key)
{
- struct si_shader_info *info = &shader->selector->info;
-
- memset(key, 0, sizeof(*key));
- key->ps_prolog.states = shader->key.part.ps.prolog;
- key->ps_prolog.colors_read = info->colors_read;
- key->ps_prolog.num_input_sgprs = shader->info.num_input_sgprs;
- key->ps_prolog.num_input_vgprs = shader->info.num_input_vgprs;
- key->ps_prolog.wqm = info->uses_derivatives &&
- (key->ps_prolog.colors_read ||
- key->ps_prolog.states.force_persp_sample_interp ||
- key->ps_prolog.states.force_linear_sample_interp ||
- key->ps_prolog.states.force_persp_center_interp ||
- key->ps_prolog.states.force_linear_center_interp ||
- key->ps_prolog.states.bc_optimize_for_persp ||
- key->ps_prolog.states.bc_optimize_for_linear);
- key->ps_prolog.ancillary_vgpr_index = shader->info.ancillary_vgpr_index;
+ unsigned num_sgprs, num_vgprs;
+ LLVMBuilderRef builder = ctx->ac.builder;
+ LLVMTypeRef returns[AC_MAX_ARGS];
+ LLVMValueRef func, ret;
- if (info->colors_read) {
- unsigned *color = shader->selector->color_attr_index;
+ memset(&ctx->args, 0, sizeof(ctx->args));
- if (shader->key.part.ps.prolog.color_two_side) {
- /* BCOLORs are stored after the last input. */
- key->ps_prolog.num_interp_inputs = info->num_inputs;
- key->ps_prolog.face_vgpr_index = shader->info.face_vgpr_index;
- if (separate_prolog)
- shader->config.spi_ps_input_ena |= S_0286CC_FRONT_FACE_ENA(1);
- }
+ if (ctx->screen->info.chip_class >= GFX9) {
+ if (key->gs_prolog.states.gfx9_prev_is_vs)
+ num_sgprs = 8 + GFX9_VSGS_NUM_USER_SGPR;
+ else
+ num_sgprs = 8 + GFX9_TESGS_NUM_USER_SGPR;
+ num_vgprs = 5; /* ES inputs are not needed by GS */
+ } else {
+ num_sgprs = GFX6_GS_NUM_USER_SGPR + 2;
+ num_vgprs = 8;
+ }
- for (unsigned i = 0; i < 2; i++) {
- unsigned interp = info->input_interpolate[color[i]];
- unsigned location = info->input_interpolate_loc[color[i]];
+ for (unsigned i = 0; i < num_sgprs; ++i) {
+ ac_add_arg(&ctx->args, AC_ARG_SGPR, 1, AC_ARG_INT, NULL);
+ returns[i] = ctx->i32;
+ }
- if (!(info->colors_read & (0xf << i*4)))
- continue;
+ for (unsigned i = 0; i < num_vgprs; ++i) {
+ ac_add_arg(&ctx->args, AC_ARG_VGPR, 1, AC_ARG_INT, NULL);
+ returns[num_sgprs + i] = ctx->f32;
+ }
- key->ps_prolog.color_attr_index[i] = color[i];
-
- if (shader->key.part.ps.prolog.flatshade_colors &&
- interp == TGSI_INTERPOLATE_COLOR)
- interp = TGSI_INTERPOLATE_CONSTANT;
-
- switch (interp) {
- case TGSI_INTERPOLATE_CONSTANT:
- key->ps_prolog.color_interp_vgpr_index[i] = -1;
- break;
- case TGSI_INTERPOLATE_PERSPECTIVE:
- case TGSI_INTERPOLATE_COLOR:
- /* Force the interpolation location for colors here. */
- if (shader->key.part.ps.prolog.force_persp_sample_interp)
- location = TGSI_INTERPOLATE_LOC_SAMPLE;
- if (shader->key.part.ps.prolog.force_persp_center_interp)
- location = TGSI_INTERPOLATE_LOC_CENTER;
-
- switch (location) {
- case TGSI_INTERPOLATE_LOC_SAMPLE:
- key->ps_prolog.color_interp_vgpr_index[i] = 0;
- if (separate_prolog) {
- shader->config.spi_ps_input_ena |=
- S_0286CC_PERSP_SAMPLE_ENA(1);
- }
- break;
- case TGSI_INTERPOLATE_LOC_CENTER:
- key->ps_prolog.color_interp_vgpr_index[i] = 2;
- if (separate_prolog) {
- shader->config.spi_ps_input_ena |=
- S_0286CC_PERSP_CENTER_ENA(1);
- }
- break;
- case TGSI_INTERPOLATE_LOC_CENTROID:
- key->ps_prolog.color_interp_vgpr_index[i] = 4;
- if (separate_prolog) {
- shader->config.spi_ps_input_ena |=
- S_0286CC_PERSP_CENTROID_ENA(1);
- }
- break;
- default:
- assert(0);
- }
- break;
- case TGSI_INTERPOLATE_LINEAR:
- /* Force the interpolation location for colors here. */
- if (shader->key.part.ps.prolog.force_linear_sample_interp)
- location = TGSI_INTERPOLATE_LOC_SAMPLE;
- if (shader->key.part.ps.prolog.force_linear_center_interp)
- location = TGSI_INTERPOLATE_LOC_CENTER;
-
- /* The VGPR assignment for non-monolithic shaders
- * works because InitialPSInputAddr is set on the
- * main shader and PERSP_PULL_MODEL is never used.
- */
- switch (location) {
- case TGSI_INTERPOLATE_LOC_SAMPLE:
- key->ps_prolog.color_interp_vgpr_index[i] =
- separate_prolog ? 6 : 9;
- if (separate_prolog) {
- shader->config.spi_ps_input_ena |=
- S_0286CC_LINEAR_SAMPLE_ENA(1);
- }
- break;
- case TGSI_INTERPOLATE_LOC_CENTER:
- key->ps_prolog.color_interp_vgpr_index[i] =
- separate_prolog ? 8 : 11;
- if (separate_prolog) {
- shader->config.spi_ps_input_ena |=
- S_0286CC_LINEAR_CENTER_ENA(1);
- }
- break;
- case TGSI_INTERPOLATE_LOC_CENTROID:
- key->ps_prolog.color_interp_vgpr_index[i] =
- separate_prolog ? 10 : 13;
- if (separate_prolog) {
- shader->config.spi_ps_input_ena |=
- S_0286CC_LINEAR_CENTROID_ENA(1);
- }
- break;
- default:
- assert(0);
- }
- break;
- default:
- assert(0);
- }
- }
- }
-}
-
-/**
- * Check whether a PS prolog is required based on the key.
- */
-static bool si_need_ps_prolog(const union si_shader_part_key *key)
-{
- return key->ps_prolog.colors_read ||
- key->ps_prolog.states.force_persp_sample_interp ||
- key->ps_prolog.states.force_linear_sample_interp ||
- key->ps_prolog.states.force_persp_center_interp ||
- key->ps_prolog.states.force_linear_center_interp ||
- key->ps_prolog.states.bc_optimize_for_persp ||
- key->ps_prolog.states.bc_optimize_for_linear ||
- key->ps_prolog.states.poly_stipple ||
- key->ps_prolog.states.samplemask_log_ps_iter;
-}
-
-/**
- * Compute the PS epilog key, which contains all the information needed to
- * build the PS epilog function.
- */
-static void si_get_ps_epilog_key(struct si_shader *shader,
- union si_shader_part_key *key)
-{
- struct si_shader_info *info = &shader->selector->info;
- memset(key, 0, sizeof(*key));
- key->ps_epilog.colors_written = info->colors_written;
- key->ps_epilog.writes_z = info->writes_z;
- key->ps_epilog.writes_stencil = info->writes_stencil;
- key->ps_epilog.writes_samplemask = info->writes_samplemask;
- key->ps_epilog.states = shader->key.part.ps.epilog;
-}
-
-/**
- * Build the GS prolog function. Rotate the input vertices for triangle strips
- * with adjacency.
- */
-static void si_build_gs_prolog_function(struct si_shader_context *ctx,
- union si_shader_part_key *key)
-{
- unsigned num_sgprs, num_vgprs;
- LLVMBuilderRef builder = ctx->ac.builder;
- LLVMTypeRef returns[AC_MAX_ARGS];
- LLVMValueRef func, ret;
-
- memset(&ctx->args, 0, sizeof(ctx->args));
-
- if (ctx->screen->info.chip_class >= GFX9) {
- if (key->gs_prolog.states.gfx9_prev_is_vs)
- num_sgprs = 8 + GFX9_VSGS_NUM_USER_SGPR;
- else
- num_sgprs = 8 + GFX9_TESGS_NUM_USER_SGPR;
- num_vgprs = 5; /* ES inputs are not needed by GS */
- } else {
- num_sgprs = GFX6_GS_NUM_USER_SGPR + 2;
- num_vgprs = 8;
- }
-
- for (unsigned i = 0; i < num_sgprs; ++i) {
- ac_add_arg(&ctx->args, AC_ARG_SGPR, 1, AC_ARG_INT, NULL);
- returns[i] = ctx->i32;
- }
-
- for (unsigned i = 0; i < num_vgprs; ++i) {
- ac_add_arg(&ctx->args, AC_ARG_VGPR, 1, AC_ARG_INT, NULL);
- returns[num_sgprs + i] = ctx->f32;
- }
-
- /* Create the function. */
- si_llvm_create_func(ctx, "gs_prolog", returns, num_sgprs + num_vgprs, 0);
- func = ctx->main_fn;
+ /* Create the function. */
+ si_llvm_create_func(ctx, "gs_prolog", returns, num_sgprs + num_vgprs, 0);
+ func = ctx->main_fn;
/* Set the full EXEC mask for the prolog, because we are only fiddling
* with registers here. The main shader part will set the correct EXEC
* Given a list of shader part functions, build a wrapper function that
* runs them in sequence to form a monolithic shader.
*/
-static void si_build_wrapper_function(struct si_shader_context *ctx,
- LLVMValueRef *parts,
- unsigned num_parts,
- unsigned main_part,
- unsigned next_shader_first_part)
+void si_build_wrapper_function(struct si_shader_context *ctx, LLVMValueRef *parts,
+ unsigned num_parts, unsigned main_part,
+ unsigned next_shader_first_part)
{
LLVMBuilderRef builder = ctx->ac.builder;
/* PS epilog has one arg per color component; gfx9 merged shader
si_llvm_create_func(ctx, "wrapper", returns, num_returns,
si_get_max_workgroup_size(ctx->shader));
- if (is_merged_shader(ctx))
+ if (si_is_merged_shader(ctx))
ac_init_exec_full_mask(&ctx->ac);
/* Record the arguments of the function as if they were an output of
si_build_wrapper_function(&ctx, parts, 2, 1, 0);
}
} else if (shader->is_monolithic && ctx.type == PIPE_SHADER_FRAGMENT) {
- LLVMValueRef parts[3];
- union si_shader_part_key prolog_key;
- union si_shader_part_key epilog_key;
- bool need_prolog;
-
- si_get_ps_prolog_key(shader, &prolog_key, false);
- need_prolog = si_need_ps_prolog(&prolog_key);
-
- parts[need_prolog ? 1 : 0] = ctx.main_fn;
-
- if (need_prolog) {
- si_build_ps_prolog_function(&ctx, &prolog_key);
- parts[0] = ctx.main_fn;
- }
-
- si_get_ps_epilog_key(shader, &epilog_key);
- si_build_ps_epilog_function(&ctx, &epilog_key);
- parts[need_prolog ? 2 : 1] = ctx.main_fn;
-
- si_build_wrapper_function(&ctx, parts, need_prolog ? 3 : 2,
- need_prolog ? 1 : 0, 0);
+ si_llvm_build_monolithic_ps(&ctx, shader);
}
si_llvm_optimize_module(&ctx);
}
/* Add the scratch offset to input SGPRs. */
- if (shader->config.scratch_bytes_per_wave && !is_merged_shader(&ctx))
+ if (shader->config.scratch_bytes_per_wave && !si_is_merged_shader(&ctx))
shader->info.num_input_sgprs += 1; /* scratch byte offset */
/* Calculate the number of fragment input VGPRs. */
return result;
}
-static LLVMValueRef si_prolog_get_rw_buffers(struct si_shader_context *ctx)
-{
- LLVMValueRef ptr[2], list;
- bool merged_shader = is_merged_shader(ctx);
-
- ptr[0] = LLVMGetParam(ctx->main_fn, (merged_shader ? 8 : 0) + SI_SGPR_RW_BUFFERS);
- list = LLVMBuildIntToPtr(ctx->ac.builder, ptr[0],
- ac_array_in_const32_addr_space(ctx->v4i32), "");
- return list;
-}
-
/**
* Build the vertex shader prolog function.
*
for (unsigned j = 0; j < 4; j++) {
udiv_factors[j] =
- buffer_load_const(ctx, instance_divisor_constbuf,
- LLVMConstInt(ctx->i32, i*16 + j*4, 0));
+ si_buffer_load_const(ctx, instance_divisor_constbuf,
+ LLVMConstInt(ctx->i32, i*16 + j*4, 0));
udiv_factors[j] = ac_to_integer(&ctx->ac, udiv_factors[j]);
}
/* The faster NUW version doesn't work when InstanceID == UINT_MAX.
}
/**
- * Build the pixel shader prolog function. This handles:
- * - two-side color selection and interpolation
- * - overriding interpolation parameters for the API PS
- * - polygon stippling
- *
- * All preloaded SGPRs and VGPRs are passed through unmodified unless they are
- * overriden by other states. (e.g. per-sample interpolation)
- * Interpolated colors are stored after the preloaded VGPRs.
+ * Compute the PS prolog key, which contains all the information needed to
+ * build the PS prolog function, and set related bits in shader->config.
*/
-static void si_build_ps_prolog_function(struct si_shader_context *ctx,
- union si_shader_part_key *key)
+void si_get_ps_prolog_key(struct si_shader *shader,
+ union si_shader_part_key *key,
+ bool separate_prolog)
{
- LLVMValueRef ret, func;
- int num_returns, i, num_color_channels;
+ struct si_shader_info *info = &shader->selector->info;
- assert(si_need_ps_prolog(key));
+ memset(key, 0, sizeof(*key));
+ key->ps_prolog.states = shader->key.part.ps.prolog;
+ key->ps_prolog.colors_read = info->colors_read;
+ key->ps_prolog.num_input_sgprs = shader->info.num_input_sgprs;
+ key->ps_prolog.num_input_vgprs = shader->info.num_input_vgprs;
+ key->ps_prolog.wqm = info->uses_derivatives &&
+ (key->ps_prolog.colors_read ||
+ key->ps_prolog.states.force_persp_sample_interp ||
+ key->ps_prolog.states.force_linear_sample_interp ||
+ key->ps_prolog.states.force_persp_center_interp ||
+ key->ps_prolog.states.force_linear_center_interp ||
+ key->ps_prolog.states.bc_optimize_for_persp ||
+ key->ps_prolog.states.bc_optimize_for_linear);
+ key->ps_prolog.ancillary_vgpr_index = shader->info.ancillary_vgpr_index;
- memset(&ctx->args, 0, sizeof(ctx->args));
+ if (info->colors_read) {
+ unsigned *color = shader->selector->color_attr_index;
- /* Declare inputs. */
- LLVMTypeRef return_types[AC_MAX_ARGS];
- num_returns = 0;
- num_color_channels = util_bitcount(key->ps_prolog.colors_read);
- assert(key->ps_prolog.num_input_sgprs +
- key->ps_prolog.num_input_vgprs +
- num_color_channels <= AC_MAX_ARGS);
- for (i = 0; i < key->ps_prolog.num_input_sgprs; i++) {
- ac_add_arg(&ctx->args, AC_ARG_SGPR, 1, AC_ARG_INT, NULL);
- return_types[num_returns++] = ctx->i32;
-
- }
-
- struct ac_arg pos_fixed_pt;
- struct ac_arg ancillary;
- struct ac_arg param_sample_mask;
- for (i = 0; i < key->ps_prolog.num_input_vgprs; i++) {
- struct ac_arg *arg = NULL;
- if (i == key->ps_prolog.ancillary_vgpr_index) {
- arg = &ancillary;
- } else if (i == key->ps_prolog.ancillary_vgpr_index + 1) {
- arg = ¶m_sample_mask;
- } else if (i == key->ps_prolog.num_input_vgprs - 1) {
- /* POS_FIXED_PT is always last. */
- arg = &pos_fixed_pt;
+ if (shader->key.part.ps.prolog.color_two_side) {
+ /* BCOLORs are stored after the last input. */
+ key->ps_prolog.num_interp_inputs = info->num_inputs;
+ key->ps_prolog.face_vgpr_index = shader->info.face_vgpr_index;
+ if (separate_prolog)
+ shader->config.spi_ps_input_ena |= S_0286CC_FRONT_FACE_ENA(1);
}
- ac_add_arg(&ctx->args, AC_ARG_VGPR, 1, AC_ARG_FLOAT, arg);
- return_types[num_returns++] = ctx->f32;
- }
- /* Declare outputs (same as inputs + add colors if needed) */
- for (i = 0; i < num_color_channels; i++)
- return_types[num_returns++] = ctx->f32;
+ for (unsigned i = 0; i < 2; i++) {
+ unsigned interp = info->input_interpolate[color[i]];
+ unsigned location = info->input_interpolate_loc[color[i]];
- /* Create the function. */
- si_llvm_create_func(ctx, "ps_prolog", return_types, num_returns, 0);
- func = ctx->main_fn;
+ if (!(info->colors_read & (0xf << i*4)))
+ continue;
- /* Copy inputs to outputs. This should be no-op, as the registers match,
- * but it will prevent the compiler from overwriting them unintentionally.
- */
- ret = ctx->return_value;
- for (i = 0; i < ctx->args.arg_count; i++) {
- LLVMValueRef p = LLVMGetParam(func, i);
- ret = LLVMBuildInsertValue(ctx->ac.builder, ret, p, i, "");
- }
+ key->ps_prolog.color_attr_index[i] = color[i];
- /* Polygon stippling. */
- if (key->ps_prolog.states.poly_stipple) {
- LLVMValueRef list = si_prolog_get_rw_buffers(ctx);
+ if (shader->key.part.ps.prolog.flatshade_colors &&
+ interp == TGSI_INTERPOLATE_COLOR)
+ interp = TGSI_INTERPOLATE_CONSTANT;
- si_llvm_emit_polygon_stipple(ctx, list, pos_fixed_pt);
- }
+ switch (interp) {
+ case TGSI_INTERPOLATE_CONSTANT:
+ key->ps_prolog.color_interp_vgpr_index[i] = -1;
+ break;
+ case TGSI_INTERPOLATE_PERSPECTIVE:
+ case TGSI_INTERPOLATE_COLOR:
+ /* Force the interpolation location for colors here. */
+ if (shader->key.part.ps.prolog.force_persp_sample_interp)
+ location = TGSI_INTERPOLATE_LOC_SAMPLE;
+ if (shader->key.part.ps.prolog.force_persp_center_interp)
+ location = TGSI_INTERPOLATE_LOC_CENTER;
- if (key->ps_prolog.states.bc_optimize_for_persp ||
- key->ps_prolog.states.bc_optimize_for_linear) {
- unsigned i, base = key->ps_prolog.num_input_sgprs;
- LLVMValueRef center[2], centroid[2], tmp, bc_optimize;
+ switch (location) {
+ case TGSI_INTERPOLATE_LOC_SAMPLE:
+ key->ps_prolog.color_interp_vgpr_index[i] = 0;
+ if (separate_prolog) {
+ shader->config.spi_ps_input_ena |=
+ S_0286CC_PERSP_SAMPLE_ENA(1);
+ }
+ break;
+ case TGSI_INTERPOLATE_LOC_CENTER:
+ key->ps_prolog.color_interp_vgpr_index[i] = 2;
+ if (separate_prolog) {
+ shader->config.spi_ps_input_ena |=
+ S_0286CC_PERSP_CENTER_ENA(1);
+ }
+ break;
+ case TGSI_INTERPOLATE_LOC_CENTROID:
+ key->ps_prolog.color_interp_vgpr_index[i] = 4;
+ if (separate_prolog) {
+ shader->config.spi_ps_input_ena |=
+ S_0286CC_PERSP_CENTROID_ENA(1);
+ }
+ break;
+ default:
+ assert(0);
+ }
+ break;
+ case TGSI_INTERPOLATE_LINEAR:
+ /* Force the interpolation location for colors here. */
+ if (shader->key.part.ps.prolog.force_linear_sample_interp)
+ location = TGSI_INTERPOLATE_LOC_SAMPLE;
+ if (shader->key.part.ps.prolog.force_linear_center_interp)
+ location = TGSI_INTERPOLATE_LOC_CENTER;
- /* The shader should do: if (PRIM_MASK[31]) CENTROID = CENTER;
- * The hw doesn't compute CENTROID if the whole wave only
- * contains fully-covered quads.
- *
- * PRIM_MASK is after user SGPRs.
- */
- bc_optimize = LLVMGetParam(func, SI_PS_NUM_USER_SGPR);
- bc_optimize = LLVMBuildLShr(ctx->ac.builder, bc_optimize,
- LLVMConstInt(ctx->i32, 31, 0), "");
- bc_optimize = LLVMBuildTrunc(ctx->ac.builder, bc_optimize,
- ctx->i1, "");
-
- if (key->ps_prolog.states.bc_optimize_for_persp) {
- /* Read PERSP_CENTER. */
- for (i = 0; i < 2; i++)
- center[i] = LLVMGetParam(func, base + 2 + i);
- /* Read PERSP_CENTROID. */
- for (i = 0; i < 2; i++)
- centroid[i] = LLVMGetParam(func, base + 4 + i);
- /* Select PERSP_CENTROID. */
- for (i = 0; i < 2; i++) {
- tmp = LLVMBuildSelect(ctx->ac.builder, bc_optimize,
- center[i], centroid[i], "");
- ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
- tmp, base + 4 + i, "");
- }
- }
- if (key->ps_prolog.states.bc_optimize_for_linear) {
- /* Read LINEAR_CENTER. */
- for (i = 0; i < 2; i++)
- center[i] = LLVMGetParam(func, base + 8 + i);
- /* Read LINEAR_CENTROID. */
- for (i = 0; i < 2; i++)
- centroid[i] = LLVMGetParam(func, base + 10 + i);
- /* Select LINEAR_CENTROID. */
- for (i = 0; i < 2; i++) {
- tmp = LLVMBuildSelect(ctx->ac.builder, bc_optimize,
- center[i], centroid[i], "");
- ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
- tmp, base + 10 + i, "");
+ /* The VGPR assignment for non-monolithic shaders
+ * works because InitialPSInputAddr is set on the
+ * main shader and PERSP_PULL_MODEL is never used.
+ */
+ switch (location) {
+ case TGSI_INTERPOLATE_LOC_SAMPLE:
+ key->ps_prolog.color_interp_vgpr_index[i] =
+ separate_prolog ? 6 : 9;
+ if (separate_prolog) {
+ shader->config.spi_ps_input_ena |=
+ S_0286CC_LINEAR_SAMPLE_ENA(1);
+ }
+ break;
+ case TGSI_INTERPOLATE_LOC_CENTER:
+ key->ps_prolog.color_interp_vgpr_index[i] =
+ separate_prolog ? 8 : 11;
+ if (separate_prolog) {
+ shader->config.spi_ps_input_ena |=
+ S_0286CC_LINEAR_CENTER_ENA(1);
+ }
+ break;
+ case TGSI_INTERPOLATE_LOC_CENTROID:
+ key->ps_prolog.color_interp_vgpr_index[i] =
+ separate_prolog ? 10 : 13;
+ if (separate_prolog) {
+ shader->config.spi_ps_input_ena |=
+ S_0286CC_LINEAR_CENTROID_ENA(1);
+ }
+ break;
+ default:
+ assert(0);
+ }
+ break;
+ default:
+ assert(0);
}
}
}
-
- /* Force per-sample interpolation. */
- if (key->ps_prolog.states.force_persp_sample_interp) {
- unsigned i, base = key->ps_prolog.num_input_sgprs;
- LLVMValueRef persp_sample[2];
-
- /* Read PERSP_SAMPLE. */
- for (i = 0; i < 2; i++)
- persp_sample[i] = LLVMGetParam(func, base + i);
- /* Overwrite PERSP_CENTER. */
- for (i = 0; i < 2; i++)
- ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
- persp_sample[i], base + 2 + i, "");
- /* Overwrite PERSP_CENTROID. */
- for (i = 0; i < 2; i++)
- ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
- persp_sample[i], base + 4 + i, "");
- }
- if (key->ps_prolog.states.force_linear_sample_interp) {
- unsigned i, base = key->ps_prolog.num_input_sgprs;
- LLVMValueRef linear_sample[2];
-
- /* Read LINEAR_SAMPLE. */
- for (i = 0; i < 2; i++)
- linear_sample[i] = LLVMGetParam(func, base + 6 + i);
- /* Overwrite LINEAR_CENTER. */
- for (i = 0; i < 2; i++)
- ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
- linear_sample[i], base + 8 + i, "");
- /* Overwrite LINEAR_CENTROID. */
- for (i = 0; i < 2; i++)
- ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
- linear_sample[i], base + 10 + i, "");
- }
-
- /* Force center interpolation. */
- if (key->ps_prolog.states.force_persp_center_interp) {
- unsigned i, base = key->ps_prolog.num_input_sgprs;
- LLVMValueRef persp_center[2];
-
- /* Read PERSP_CENTER. */
- for (i = 0; i < 2; i++)
- persp_center[i] = LLVMGetParam(func, base + 2 + i);
- /* Overwrite PERSP_SAMPLE. */
- for (i = 0; i < 2; i++)
- ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
- persp_center[i], base + i, "");
- /* Overwrite PERSP_CENTROID. */
- for (i = 0; i < 2; i++)
- ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
- persp_center[i], base + 4 + i, "");
- }
- if (key->ps_prolog.states.force_linear_center_interp) {
- unsigned i, base = key->ps_prolog.num_input_sgprs;
- LLVMValueRef linear_center[2];
-
- /* Read LINEAR_CENTER. */
- for (i = 0; i < 2; i++)
- linear_center[i] = LLVMGetParam(func, base + 8 + i);
- /* Overwrite LINEAR_SAMPLE. */
- for (i = 0; i < 2; i++)
- ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
- linear_center[i], base + 6 + i, "");
- /* Overwrite LINEAR_CENTROID. */
- for (i = 0; i < 2; i++)
- ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
- linear_center[i], base + 10 + i, "");
- }
-
- /* Interpolate colors. */
- unsigned color_out_idx = 0;
- for (i = 0; i < 2; i++) {
- unsigned writemask = (key->ps_prolog.colors_read >> (i * 4)) & 0xf;
- unsigned face_vgpr = key->ps_prolog.num_input_sgprs +
- key->ps_prolog.face_vgpr_index;
- LLVMValueRef interp[2], color[4];
- LLVMValueRef interp_ij = NULL, prim_mask = NULL, face = NULL;
-
- if (!writemask)
- continue;
-
- /* If the interpolation qualifier is not CONSTANT (-1). */
- if (key->ps_prolog.color_interp_vgpr_index[i] != -1) {
- unsigned interp_vgpr = key->ps_prolog.num_input_sgprs +
- key->ps_prolog.color_interp_vgpr_index[i];
-
- /* Get the (i,j) updated by bc_optimize handling. */
- interp[0] = LLVMBuildExtractValue(ctx->ac.builder, ret,
- interp_vgpr, "");
- interp[1] = LLVMBuildExtractValue(ctx->ac.builder, ret,
- interp_vgpr + 1, "");
- interp_ij = ac_build_gather_values(&ctx->ac, interp, 2);
- }
-
- /* Use the absolute location of the input. */
- prim_mask = LLVMGetParam(func, SI_PS_NUM_USER_SGPR);
-
- if (key->ps_prolog.states.color_two_side) {
- face = LLVMGetParam(func, face_vgpr);
- face = ac_to_integer(&ctx->ac, face);
- }
-
- interp_fs_color(ctx,
- key->ps_prolog.color_attr_index[i], i,
- key->ps_prolog.num_interp_inputs,
- key->ps_prolog.colors_read, interp_ij,
- prim_mask, face, color);
-
- while (writemask) {
- unsigned chan = u_bit_scan(&writemask);
- ret = LLVMBuildInsertValue(ctx->ac.builder, ret, color[chan],
- ctx->args.arg_count + color_out_idx++, "");
- }
- }
-
- /* Section 15.2.2 (Shader Inputs) of the OpenGL 4.5 (Core Profile) spec
- * says:
- *
- * "When per-sample shading is active due to the use of a fragment
- * input qualified by sample or due to the use of the gl_SampleID
- * or gl_SamplePosition variables, only the bit for the current
- * sample is set in gl_SampleMaskIn. When state specifies multiple
- * fragment shader invocations for a given fragment, the sample
- * mask for any single fragment shader invocation may specify a
- * subset of the covered samples for the fragment. In this case,
- * the bit corresponding to each covered sample will be set in
- * exactly one fragment shader invocation."
- *
- * The samplemask loaded by hardware is always the coverage of the
- * entire pixel/fragment, so mask bits out based on the sample ID.
- */
- if (key->ps_prolog.states.samplemask_log_ps_iter) {
- /* The bit pattern matches that used by fixed function fragment
- * processing. */
- static const uint16_t ps_iter_masks[] = {
- 0xffff, /* not used */
- 0x5555,
- 0x1111,
- 0x0101,
- 0x0001,
- };
- assert(key->ps_prolog.states.samplemask_log_ps_iter < ARRAY_SIZE(ps_iter_masks));
-
- uint32_t ps_iter_mask = ps_iter_masks[key->ps_prolog.states.samplemask_log_ps_iter];
- LLVMValueRef sampleid = si_unpack_param(ctx, ancillary, 8, 4);
- LLVMValueRef samplemask = ac_get_arg(&ctx->ac, param_sample_mask);
-
- samplemask = ac_to_integer(&ctx->ac, samplemask);
- samplemask = LLVMBuildAnd(
- ctx->ac.builder,
- samplemask,
- LLVMBuildShl(ctx->ac.builder,
- LLVMConstInt(ctx->i32, ps_iter_mask, false),
- sampleid, ""),
- "");
- samplemask = ac_to_float(&ctx->ac, samplemask);
-
- ret = LLVMBuildInsertValue(ctx->ac.builder, ret, samplemask,
- param_sample_mask.arg_index, "");
- }
-
- /* Tell LLVM to insert WQM instruction sequence when needed. */
- if (key->ps_prolog.wqm) {
- LLVMAddTargetDependentFunctionAttr(func,
- "amdgpu-ps-wqm-outputs", "");
- }
-
- si_llvm_build_ret(ctx, ret);
}
/**
- * Build the pixel shader epilog function. This handles everything that must be
- * emulated for pixel shader exports. (alpha-test, format conversions, etc)
+ * Check whether a PS prolog is required based on the key.
*/
-static void si_build_ps_epilog_function(struct si_shader_context *ctx,
- union si_shader_part_key *key)
+bool si_need_ps_prolog(const union si_shader_part_key *key)
{
- LLVMValueRef depth = NULL, stencil = NULL, samplemask = NULL;
- int i;
- struct si_ps_exports exp = {};
-
- memset(&ctx->args, 0, sizeof(ctx->args));
-
- /* Declare input SGPRs. */
- ac_add_arg(&ctx->args, AC_ARG_SGPR, 1, AC_ARG_INT, &ctx->rw_buffers);
- ac_add_arg(&ctx->args, AC_ARG_SGPR, 1, AC_ARG_INT,
- &ctx->bindless_samplers_and_images);
- ac_add_arg(&ctx->args, AC_ARG_SGPR, 1, AC_ARG_INT,
- &ctx->const_and_shader_buffers);
- ac_add_arg(&ctx->args, AC_ARG_SGPR, 1, AC_ARG_INT,
- &ctx->samplers_and_images);
- add_arg_checked(&ctx->args, AC_ARG_SGPR, 1, AC_ARG_FLOAT,
- NULL, SI_PARAM_ALPHA_REF);
-
- /* Declare input VGPRs. */
- unsigned required_num_params =
- ctx->args.num_sgprs_used +
- util_bitcount(key->ps_epilog.colors_written) * 4 +
- key->ps_epilog.writes_z +
- key->ps_epilog.writes_stencil +
- key->ps_epilog.writes_samplemask;
-
- required_num_params = MAX2(required_num_params,
- ctx->args.num_sgprs_used + PS_EPILOG_SAMPLEMASK_MIN_LOC + 1);
-
- while (ctx->args.arg_count < required_num_params)
- ac_add_arg(&ctx->args, AC_ARG_VGPR, 1, AC_ARG_FLOAT, NULL);
-
- /* Create the function. */
- si_llvm_create_func(ctx, "ps_epilog", NULL, 0, 0);
- /* Disable elimination of unused inputs. */
- ac_llvm_add_target_dep_function_attr(ctx->main_fn,
- "InitialPSInputAddr", 0xffffff);
-
- /* Process colors. */
- unsigned vgpr = ctx->args.num_sgprs_used;
- unsigned colors_written = key->ps_epilog.colors_written;
- int last_color_export = -1;
-
- /* Find the last color export. */
- if (!key->ps_epilog.writes_z &&
- !key->ps_epilog.writes_stencil &&
- !key->ps_epilog.writes_samplemask) {
- unsigned spi_format = key->ps_epilog.states.spi_shader_col_format;
-
- /* If last_cbuf > 0, FS_COLOR0_WRITES_ALL_CBUFS is true. */
- if (colors_written == 0x1 && key->ps_epilog.states.last_cbuf > 0) {
- /* Just set this if any of the colorbuffers are enabled. */
- if (spi_format &
- ((1ull << (4 * (key->ps_epilog.states.last_cbuf + 1))) - 1))
- last_color_export = 0;
- } else {
- for (i = 0; i < 8; i++)
- if (colors_written & (1 << i) &&
- (spi_format >> (i * 4)) & 0xf)
- last_color_export = i;
- }
- }
-
- while (colors_written) {
- LLVMValueRef color[4];
- int mrt = u_bit_scan(&colors_written);
-
- for (i = 0; i < 4; i++)
- color[i] = LLVMGetParam(ctx->main_fn, vgpr++);
-
- si_export_mrt_color(ctx, color, mrt,
- ctx->args.arg_count - 1,
- mrt == last_color_export, &exp);
- }
-
- /* Process depth, stencil, samplemask. */
- if (key->ps_epilog.writes_z)
- depth = LLVMGetParam(ctx->main_fn, vgpr++);
- if (key->ps_epilog.writes_stencil)
- stencil = LLVMGetParam(ctx->main_fn, vgpr++);
- if (key->ps_epilog.writes_samplemask)
- samplemask = LLVMGetParam(ctx->main_fn, vgpr++);
-
- if (depth || stencil || samplemask)
- si_export_mrt_z(ctx, depth, stencil, samplemask, &exp);
- else if (last_color_export == -1)
- ac_build_export_null(&ctx->ac);
-
- if (exp.num)
- si_emit_ps_exports(ctx, &exp);
+ return key->ps_prolog.colors_read ||
+ key->ps_prolog.states.force_persp_sample_interp ||
+ key->ps_prolog.states.force_linear_sample_interp ||
+ key->ps_prolog.states.force_persp_center_interp ||
+ key->ps_prolog.states.force_linear_center_interp ||
+ key->ps_prolog.states.bc_optimize_for_persp ||
+ key->ps_prolog.states.bc_optimize_for_linear ||
+ key->ps_prolog.states.poly_stipple ||
+ key->ps_prolog.states.samplemask_log_ps_iter;
+}
- /* Compile. */
- LLVMBuildRetVoid(ctx->ac.builder);
+/**
+ * Compute the PS epilog key, which contains all the information needed to
+ * build the PS epilog function.
+ */
+void si_get_ps_epilog_key(struct si_shader *shader,
+ union si_shader_part_key *key)
+{
+ struct si_shader_info *info = &shader->selector->info;
+ memset(key, 0, sizeof(*key));
+ key->ps_epilog.colors_written = info->colors_written;
+ key->ps_epilog.writes_z = info->writes_z;
+ key->ps_epilog.writes_stencil = info->writes_stencil;
+ key->ps_epilog.writes_samplemask = info->writes_samplemask;
+ key->ps_epilog.states = shader->key.part.ps.epilog;
}
/**
si_get_shader_part(sscreen, &sscreen->ps_prologs,
PIPE_SHADER_FRAGMENT, true,
&prolog_key, compiler, debug,
- si_build_ps_prolog_function,
+ si_llvm_build_ps_prolog,
"Fragment Shader Prolog");
if (!shader->prolog)
return false;
si_get_shader_part(sscreen, &sscreen->ps_epilogs,
PIPE_SHADER_FRAGMENT, false,
&epilog_key, compiler, debug,
- si_build_ps_epilog_function,
+ si_llvm_build_ps_epilog,
"Fragment Shader Epilog");
if (!shader->epilog)
return false;
--- /dev/null
+/*
+ * Copyright 2020 Advanced Micro Devices, Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * on the rights to use, copy, modify, merge, publish, distribute, sub
+ * license, and/or sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "si_shader_internal.h"
+#include "si_pipe.h"
+#include "sid.h"
+
+LLVMValueRef si_get_sample_id(struct si_shader_context *ctx)
+{
+ return si_unpack_param(ctx, ctx->args.ancillary, 8, 4);
+}
+
+static LLVMValueRef load_sample_mask_in(struct ac_shader_abi *abi)
+{
+ struct si_shader_context *ctx = si_shader_context_from_abi(abi);
+ return ac_to_integer(&ctx->ac, ac_get_arg(&ctx->ac, ctx->args.sample_coverage));
+}
+
+static LLVMValueRef load_sample_position(struct ac_shader_abi *abi, LLVMValueRef sample_id)
+{
+ struct si_shader_context *ctx = si_shader_context_from_abi(abi);
+ LLVMValueRef desc = ac_get_arg(&ctx->ac, ctx->rw_buffers);
+ LLVMValueRef buf_index = LLVMConstInt(ctx->i32, SI_PS_CONST_SAMPLE_POSITIONS, 0);
+ LLVMValueRef resource = ac_build_load_to_sgpr(&ctx->ac, desc, buf_index);
+
+ /* offset = sample_id * 8 (8 = 2 floats containing samplepos.xy) */
+ LLVMValueRef offset0 = LLVMBuildMul(ctx->ac.builder, sample_id, LLVMConstInt(ctx->i32, 8, 0), "");
+ LLVMValueRef offset1 = LLVMBuildAdd(ctx->ac.builder, offset0, LLVMConstInt(ctx->i32, 4, 0), "");
+
+ LLVMValueRef pos[4] = {
+ si_buffer_load_const(ctx, resource, offset0),
+ si_buffer_load_const(ctx, resource, offset1),
+ LLVMConstReal(ctx->f32, 0),
+ LLVMConstReal(ctx->f32, 0)
+ };
+
+ return ac_build_gather_values(&ctx->ac, pos, 4);
+}
+
+static LLVMValueRef si_nir_emit_fbfetch(struct ac_shader_abi *abi)
+{
+ struct si_shader_context *ctx = si_shader_context_from_abi(abi);
+ struct ac_image_args args = {};
+ LLVMValueRef ptr, image, fmask;
+
+ /* Ignore src0, because KHR_blend_func_extended disallows multiple render
+ * targets.
+ */
+
+ /* Load the image descriptor. */
+ STATIC_ASSERT(SI_PS_IMAGE_COLORBUF0 % 2 == 0);
+ ptr = ac_get_arg(&ctx->ac, ctx->rw_buffers);
+ ptr = LLVMBuildPointerCast(ctx->ac.builder, ptr,
+ ac_array_in_const32_addr_space(ctx->v8i32), "");
+ image = ac_build_load_to_sgpr(&ctx->ac, ptr,
+ LLVMConstInt(ctx->i32, SI_PS_IMAGE_COLORBUF0 / 2, 0));
+
+ unsigned chan = 0;
+
+ args.coords[chan++] = si_unpack_param(ctx, ctx->pos_fixed_pt, 0, 16);
+
+ if (!ctx->shader->key.mono.u.ps.fbfetch_is_1D)
+ args.coords[chan++] = si_unpack_param(ctx, ctx->pos_fixed_pt, 16, 16);
+
+ /* Get the current render target layer index. */
+ if (ctx->shader->key.mono.u.ps.fbfetch_layered)
+ args.coords[chan++] = si_unpack_param(ctx, ctx->args.ancillary, 16, 11);
+
+ if (ctx->shader->key.mono.u.ps.fbfetch_msaa)
+ args.coords[chan++] = si_get_sample_id(ctx);
+
+ if (ctx->shader->key.mono.u.ps.fbfetch_msaa &&
+ !(ctx->screen->debug_flags & DBG(NO_FMASK))) {
+ fmask = ac_build_load_to_sgpr(&ctx->ac, ptr,
+ LLVMConstInt(ctx->i32, SI_PS_IMAGE_COLORBUF0_FMASK / 2, 0));
+
+ ac_apply_fmask_to_sample(&ctx->ac, fmask, args.coords,
+ ctx->shader->key.mono.u.ps.fbfetch_layered);
+ }
+
+ args.opcode = ac_image_load;
+ args.resource = image;
+ args.dmask = 0xf;
+ args.attributes = AC_FUNC_ATTR_READNONE;
+
+ if (ctx->shader->key.mono.u.ps.fbfetch_msaa)
+ args.dim = ctx->shader->key.mono.u.ps.fbfetch_layered ?
+ ac_image_2darraymsaa : ac_image_2dmsaa;
+ else if (ctx->shader->key.mono.u.ps.fbfetch_is_1D)
+ args.dim = ctx->shader->key.mono.u.ps.fbfetch_layered ?
+ ac_image_1darray : ac_image_1d;
+ else
+ args.dim = ctx->shader->key.mono.u.ps.fbfetch_layered ?
+ ac_image_2darray : ac_image_2d;
+
+ return ac_build_image_opcode(&ctx->ac, &args);
+}
+
+static LLVMValueRef si_build_fs_interp(struct si_shader_context *ctx,
+ unsigned attr_index, unsigned chan,
+ LLVMValueRef prim_mask,
+ LLVMValueRef i, LLVMValueRef j)
+{
+ if (i || j) {
+ return ac_build_fs_interp(&ctx->ac,
+ LLVMConstInt(ctx->i32, chan, 0),
+ LLVMConstInt(ctx->i32, attr_index, 0),
+ prim_mask, i, j);
+ }
+ return ac_build_fs_interp_mov(&ctx->ac,
+ LLVMConstInt(ctx->i32, 2, 0), /* P0 */
+ LLVMConstInt(ctx->i32, chan, 0),
+ LLVMConstInt(ctx->i32, attr_index, 0),
+ prim_mask);
+}
+
+/**
+ * Interpolate a fragment shader input.
+ *
+ * @param ctx context
+ * @param input_index index of the input in hardware
+ * @param semantic_name TGSI_SEMANTIC_*
+ * @param semantic_index semantic index
+ * @param num_interp_inputs number of all interpolated inputs (= BCOLOR offset)
+ * @param colors_read_mask color components read (4 bits for each color, 8 bits in total)
+ * @param interp_param interpolation weights (i,j)
+ * @param prim_mask SI_PARAM_PRIM_MASK
+ * @param face SI_PARAM_FRONT_FACE
+ * @param result the return value (4 components)
+ */
+static void interp_fs_color(struct si_shader_context *ctx,
+ unsigned input_index,
+ unsigned semantic_index,
+ unsigned num_interp_inputs,
+ unsigned colors_read_mask,
+ LLVMValueRef interp_param,
+ LLVMValueRef prim_mask,
+ LLVMValueRef face,
+ LLVMValueRef result[4])
+{
+ LLVMValueRef i = NULL, j = NULL;
+ unsigned chan;
+
+ /* fs.constant returns the param from the middle vertex, so it's not
+ * really useful for flat shading. It's meant to be used for custom
+ * interpolation (but the intrinsic can't fetch from the other two
+ * vertices).
+ *
+ * Luckily, it doesn't matter, because we rely on the FLAT_SHADE state
+ * to do the right thing. The only reason we use fs.constant is that
+ * fs.interp cannot be used on integers, because they can be equal
+ * to NaN.
+ *
+ * When interp is false we will use fs.constant or for newer llvm,
+ * amdgcn.interp.mov.
+ */
+ bool interp = interp_param != NULL;
+
+ if (interp) {
+ interp_param = LLVMBuildBitCast(ctx->ac.builder, interp_param,
+ LLVMVectorType(ctx->f32, 2), "");
+
+ i = LLVMBuildExtractElement(ctx->ac.builder, interp_param,
+ ctx->i32_0, "");
+ j = LLVMBuildExtractElement(ctx->ac.builder, interp_param,
+ ctx->i32_1, "");
+ }
+
+ if (ctx->shader->key.part.ps.prolog.color_two_side) {
+ LLVMValueRef is_face_positive;
+
+ /* If BCOLOR0 is used, BCOLOR1 is at offset "num_inputs + 1",
+ * otherwise it's at offset "num_inputs".
+ */
+ unsigned back_attr_offset = num_interp_inputs;
+ if (semantic_index == 1 && colors_read_mask & 0xf)
+ back_attr_offset += 1;
+
+ is_face_positive = LLVMBuildICmp(ctx->ac.builder, LLVMIntNE,
+ face, ctx->i32_0, "");
+
+ for (chan = 0; chan < 4; chan++) {
+ LLVMValueRef front, back;
+
+ front = si_build_fs_interp(ctx,
+ input_index, chan,
+ prim_mask, i, j);
+ back = si_build_fs_interp(ctx,
+ back_attr_offset, chan,
+ prim_mask, i, j);
+
+ result[chan] = LLVMBuildSelect(ctx->ac.builder,
+ is_face_positive,
+ front,
+ back,
+ "");
+ }
+ } else {
+ for (chan = 0; chan < 4; chan++) {
+ result[chan] = si_build_fs_interp(ctx,
+ input_index, chan,
+ prim_mask, i, j);
+ }
+ }
+}
+
+static void si_alpha_test(struct si_shader_context *ctx, LLVMValueRef alpha)
+{
+ if (ctx->shader->key.part.ps.epilog.alpha_func != PIPE_FUNC_NEVER) {
+ static LLVMRealPredicate cond_map[PIPE_FUNC_ALWAYS + 1] = {
+ [PIPE_FUNC_LESS] = LLVMRealOLT,
+ [PIPE_FUNC_EQUAL] = LLVMRealOEQ,
+ [PIPE_FUNC_LEQUAL] = LLVMRealOLE,
+ [PIPE_FUNC_GREATER] = LLVMRealOGT,
+ [PIPE_FUNC_NOTEQUAL] = LLVMRealONE,
+ [PIPE_FUNC_GEQUAL] = LLVMRealOGE,
+ };
+ LLVMRealPredicate cond = cond_map[ctx->shader->key.part.ps.epilog.alpha_func];
+ assert(cond);
+
+ LLVMValueRef alpha_ref = LLVMGetParam(ctx->main_fn,
+ SI_PARAM_ALPHA_REF);
+ LLVMValueRef alpha_pass =
+ LLVMBuildFCmp(ctx->ac.builder, cond, alpha, alpha_ref, "");
+ ac_build_kill_if_false(&ctx->ac, alpha_pass);
+ } else {
+ ac_build_kill_if_false(&ctx->ac, ctx->i1false);
+ }
+}
+
+static LLVMValueRef si_scale_alpha_by_sample_mask(struct si_shader_context *ctx,
+ LLVMValueRef alpha,
+ unsigned samplemask_param)
+{
+ LLVMValueRef coverage;
+
+ /* alpha = alpha * popcount(coverage) / SI_NUM_SMOOTH_AA_SAMPLES */
+ coverage = LLVMGetParam(ctx->main_fn,
+ samplemask_param);
+ coverage = ac_to_integer(&ctx->ac, coverage);
+
+ coverage = ac_build_intrinsic(&ctx->ac, "llvm.ctpop.i32",
+ ctx->i32,
+ &coverage, 1, AC_FUNC_ATTR_READNONE);
+
+ coverage = LLVMBuildUIToFP(ctx->ac.builder, coverage,
+ ctx->f32, "");
+
+ coverage = LLVMBuildFMul(ctx->ac.builder, coverage,
+ LLVMConstReal(ctx->f32,
+ 1.0 / SI_NUM_SMOOTH_AA_SAMPLES), "");
+
+ return LLVMBuildFMul(ctx->ac.builder, alpha, coverage, "");
+}
+
+struct si_ps_exports {
+ unsigned num;
+ struct ac_export_args args[10];
+};
+
+static void si_export_mrt_z(struct si_shader_context *ctx,
+ LLVMValueRef depth, LLVMValueRef stencil,
+ LLVMValueRef samplemask, struct si_ps_exports *exp)
+{
+ struct ac_export_args args;
+
+ ac_export_mrt_z(&ctx->ac, depth, stencil, samplemask, &args);
+
+ memcpy(&exp->args[exp->num++], &args, sizeof(args));
+}
+
+/* Initialize arguments for the shader export intrinsic */
+static void si_llvm_init_ps_export_args(struct si_shader_context *ctx,
+ LLVMValueRef *values,
+ unsigned target,
+ struct ac_export_args *args)
+{
+ const struct si_shader_key *key = &ctx->shader->key;
+ unsigned col_formats = key->part.ps.epilog.spi_shader_col_format;
+ LLVMValueRef f32undef = LLVMGetUndef(ctx->ac.f32);
+ unsigned spi_shader_col_format;
+ unsigned chan;
+ bool is_int8, is_int10;
+ int cbuf = target - V_008DFC_SQ_EXP_MRT;
+
+ assert(cbuf >= 0 && cbuf < 8);
+
+ spi_shader_col_format = (col_formats >> (cbuf * 4)) & 0xf;
+ is_int8 = (key->part.ps.epilog.color_is_int8 >> cbuf) & 0x1;
+ is_int10 = (key->part.ps.epilog.color_is_int10 >> cbuf) & 0x1;
+
+ /* Default is 0xf. Adjusted below depending on the format. */
+ args->enabled_channels = 0xf; /* writemask */
+
+ /* Specify whether the EXEC mask represents the valid mask */
+ args->valid_mask = 0;
+
+ /* Specify whether this is the last export */
+ args->done = 0;
+
+ /* Specify the target we are exporting */
+ args->target = target;
+
+ args->compr = false;
+ args->out[0] = f32undef;
+ args->out[1] = f32undef;
+ args->out[2] = f32undef;
+ args->out[3] = f32undef;
+
+ LLVMValueRef (*packf)(struct ac_llvm_context *ctx, LLVMValueRef args[2]) = NULL;
+ LLVMValueRef (*packi)(struct ac_llvm_context *ctx, LLVMValueRef args[2],
+ unsigned bits, bool hi) = NULL;
+
+ switch (spi_shader_col_format) {
+ case V_028714_SPI_SHADER_ZERO:
+ args->enabled_channels = 0; /* writemask */
+ args->target = V_008DFC_SQ_EXP_NULL;
+ break;
+
+ case V_028714_SPI_SHADER_32_R:
+ args->enabled_channels = 1; /* writemask */
+ args->out[0] = values[0];
+ break;
+
+ case V_028714_SPI_SHADER_32_GR:
+ args->enabled_channels = 0x3; /* writemask */
+ args->out[0] = values[0];
+ args->out[1] = values[1];
+ break;
+
+ case V_028714_SPI_SHADER_32_AR:
+ if (ctx->screen->info.chip_class >= GFX10) {
+ args->enabled_channels = 0x3; /* writemask */
+ args->out[0] = values[0];
+ args->out[1] = values[3];
+ } else {
+ args->enabled_channels = 0x9; /* writemask */
+ args->out[0] = values[0];
+ args->out[3] = values[3];
+ }
+ break;
+
+ case V_028714_SPI_SHADER_FP16_ABGR:
+ packf = ac_build_cvt_pkrtz_f16;
+ break;
+
+ case V_028714_SPI_SHADER_UNORM16_ABGR:
+ packf = ac_build_cvt_pknorm_u16;
+ break;
+
+ case V_028714_SPI_SHADER_SNORM16_ABGR:
+ packf = ac_build_cvt_pknorm_i16;
+ break;
+
+ case V_028714_SPI_SHADER_UINT16_ABGR:
+ packi = ac_build_cvt_pk_u16;
+ break;
+
+ case V_028714_SPI_SHADER_SINT16_ABGR:
+ packi = ac_build_cvt_pk_i16;
+ break;
+
+ case V_028714_SPI_SHADER_32_ABGR:
+ memcpy(&args->out[0], values, sizeof(values[0]) * 4);
+ break;
+ }
+
+ /* Pack f16 or norm_i16/u16. */
+ if (packf) {
+ for (chan = 0; chan < 2; chan++) {
+ LLVMValueRef pack_args[2] = {
+ values[2 * chan],
+ values[2 * chan + 1]
+ };
+ LLVMValueRef packed;
+
+ packed = packf(&ctx->ac, pack_args);
+ args->out[chan] = ac_to_float(&ctx->ac, packed);
+ }
+ args->compr = 1; /* COMPR flag */
+ }
+ /* Pack i16/u16. */
+ if (packi) {
+ for (chan = 0; chan < 2; chan++) {
+ LLVMValueRef pack_args[2] = {
+ ac_to_integer(&ctx->ac, values[2 * chan]),
+ ac_to_integer(&ctx->ac, values[2 * chan + 1])
+ };
+ LLVMValueRef packed;
+
+ packed = packi(&ctx->ac, pack_args,
+ is_int8 ? 8 : is_int10 ? 10 : 16,
+ chan == 1);
+ args->out[chan] = ac_to_float(&ctx->ac, packed);
+ }
+ args->compr = 1; /* COMPR flag */
+ }
+}
+
+static void si_export_mrt_color(struct si_shader_context *ctx,
+ LLVMValueRef *color, unsigned index,
+ unsigned samplemask_param,
+ bool is_last, struct si_ps_exports *exp)
+{
+ int i;
+
+ /* Clamp color */
+ if (ctx->shader->key.part.ps.epilog.clamp_color)
+ for (i = 0; i < 4; i++)
+ color[i] = ac_build_clamp(&ctx->ac, color[i]);
+
+ /* Alpha to one */
+ if (ctx->shader->key.part.ps.epilog.alpha_to_one)
+ color[3] = ctx->ac.f32_1;
+
+ /* Alpha test */
+ if (index == 0 &&
+ ctx->shader->key.part.ps.epilog.alpha_func != PIPE_FUNC_ALWAYS)
+ si_alpha_test(ctx, color[3]);
+
+ /* Line & polygon smoothing */
+ if (ctx->shader->key.part.ps.epilog.poly_line_smoothing)
+ color[3] = si_scale_alpha_by_sample_mask(ctx, color[3],
+ samplemask_param);
+
+ /* If last_cbuf > 0, FS_COLOR0_WRITES_ALL_CBUFS is true. */
+ if (ctx->shader->key.part.ps.epilog.last_cbuf > 0) {
+ struct ac_export_args args[8];
+ int c, last = -1;
+
+ /* Get the export arguments, also find out what the last one is. */
+ for (c = 0; c <= ctx->shader->key.part.ps.epilog.last_cbuf; c++) {
+ si_llvm_init_ps_export_args(ctx, color,
+ V_008DFC_SQ_EXP_MRT + c, &args[c]);
+ if (args[c].enabled_channels)
+ last = c;
+ }
+
+ /* Emit all exports. */
+ for (c = 0; c <= ctx->shader->key.part.ps.epilog.last_cbuf; c++) {
+ if (is_last && last == c) {
+ args[c].valid_mask = 1; /* whether the EXEC mask is valid */
+ args[c].done = 1; /* DONE bit */
+ } else if (!args[c].enabled_channels)
+ continue; /* unnecessary NULL export */
+
+ memcpy(&exp->args[exp->num++], &args[c], sizeof(args[c]));
+ }
+ } else {
+ struct ac_export_args args;
+
+ /* Export */
+ si_llvm_init_ps_export_args(ctx, color, V_008DFC_SQ_EXP_MRT + index,
+ &args);
+ if (is_last) {
+ args.valid_mask = 1; /* whether the EXEC mask is valid */
+ args.done = 1; /* DONE bit */
+ } else if (!args.enabled_channels)
+ return; /* unnecessary NULL export */
+
+ memcpy(&exp->args[exp->num++], &args, sizeof(args));
+ }
+}
+
+static void si_emit_ps_exports(struct si_shader_context *ctx,
+ struct si_ps_exports *exp)
+{
+ for (unsigned i = 0; i < exp->num; i++)
+ ac_build_export(&ctx->ac, &exp->args[i]);
+}
+
+/**
+ * Return PS outputs in this order:
+ *
+ * v[0:3] = color0.xyzw
+ * v[4:7] = color1.xyzw
+ * ...
+ * vN+0 = Depth
+ * vN+1 = Stencil
+ * vN+2 = SampleMask
+ * vN+3 = SampleMaskIn (used for OpenGL smoothing)
+ *
+ * The alpha-ref SGPR is returned via its original location.
+ */
+static void si_llvm_return_fs_outputs(struct ac_shader_abi *abi,
+ unsigned max_outputs,
+ LLVMValueRef *addrs)
+{
+ struct si_shader_context *ctx = si_shader_context_from_abi(abi);
+ struct si_shader *shader = ctx->shader;
+ struct si_shader_info *info = &shader->selector->info;
+ LLVMBuilderRef builder = ctx->ac.builder;
+ unsigned i, j, first_vgpr, vgpr;
+
+ LLVMValueRef color[8][4] = {};
+ LLVMValueRef depth = NULL, stencil = NULL, samplemask = NULL;
+ LLVMValueRef ret;
+
+ if (ctx->postponed_kill)
+ ac_build_kill_if_false(&ctx->ac, LLVMBuildLoad(builder, ctx->postponed_kill, ""));
+
+ /* Read the output values. */
+ for (i = 0; i < info->num_outputs; i++) {
+ unsigned semantic_name = info->output_semantic_name[i];
+ unsigned semantic_index = info->output_semantic_index[i];
+
+ switch (semantic_name) {
+ case TGSI_SEMANTIC_COLOR:
+ assert(semantic_index < 8);
+ for (j = 0; j < 4; j++) {
+ LLVMValueRef ptr = addrs[4 * i + j];
+ LLVMValueRef result = LLVMBuildLoad(builder, ptr, "");
+ color[semantic_index][j] = result;
+ }
+ break;
+ case TGSI_SEMANTIC_POSITION:
+ depth = LLVMBuildLoad(builder,
+ addrs[4 * i + 0], "");
+ break;
+ case TGSI_SEMANTIC_STENCIL:
+ stencil = LLVMBuildLoad(builder,
+ addrs[4 * i + 0], "");
+ break;
+ case TGSI_SEMANTIC_SAMPLEMASK:
+ samplemask = LLVMBuildLoad(builder,
+ addrs[4 * i + 0], "");
+ break;
+ default:
+ fprintf(stderr, "Warning: GFX6 unhandled fs output type:%d\n",
+ semantic_name);
+ }
+ }
+
+ /* Fill the return structure. */
+ ret = ctx->return_value;
+
+ /* Set SGPRs. */
+ ret = LLVMBuildInsertValue(builder, ret,
+ ac_to_integer(&ctx->ac,
+ LLVMGetParam(ctx->main_fn,
+ SI_PARAM_ALPHA_REF)),
+ SI_SGPR_ALPHA_REF, "");
+
+ /* Set VGPRs */
+ first_vgpr = vgpr = SI_SGPR_ALPHA_REF + 1;
+ for (i = 0; i < ARRAY_SIZE(color); i++) {
+ if (!color[i][0])
+ continue;
+
+ for (j = 0; j < 4; j++)
+ ret = LLVMBuildInsertValue(builder, ret, color[i][j], vgpr++, "");
+ }
+ if (depth)
+ ret = LLVMBuildInsertValue(builder, ret, depth, vgpr++, "");
+ if (stencil)
+ ret = LLVMBuildInsertValue(builder, ret, stencil, vgpr++, "");
+ if (samplemask)
+ ret = LLVMBuildInsertValue(builder, ret, samplemask, vgpr++, "");
+
+ /* Add the input sample mask for smoothing at the end. */
+ if (vgpr < first_vgpr + PS_EPILOG_SAMPLEMASK_MIN_LOC)
+ vgpr = first_vgpr + PS_EPILOG_SAMPLEMASK_MIN_LOC;
+ ret = LLVMBuildInsertValue(builder, ret,
+ LLVMGetParam(ctx->main_fn,
+ SI_PARAM_SAMPLE_COVERAGE), vgpr++, "");
+
+ ctx->return_value = ret;
+}
+
+static void si_llvm_emit_polygon_stipple(struct si_shader_context *ctx,
+ LLVMValueRef param_rw_buffers,
+ struct ac_arg param_pos_fixed_pt)
+{
+ LLVMBuilderRef builder = ctx->ac.builder;
+ LLVMValueRef slot, desc, offset, row, bit, address[2];
+
+ /* Use the fixed-point gl_FragCoord input.
+ * Since the stipple pattern is 32x32 and it repeats, just get 5 bits
+ * per coordinate to get the repeating effect.
+ */
+ address[0] = si_unpack_param(ctx, param_pos_fixed_pt, 0, 5);
+ address[1] = si_unpack_param(ctx, param_pos_fixed_pt, 16, 5);
+
+ /* Load the buffer descriptor. */
+ slot = LLVMConstInt(ctx->i32, SI_PS_CONST_POLY_STIPPLE, 0);
+ desc = ac_build_load_to_sgpr(&ctx->ac, param_rw_buffers, slot);
+
+ /* The stipple pattern is 32x32, each row has 32 bits. */
+ offset = LLVMBuildMul(builder, address[1],
+ LLVMConstInt(ctx->i32, 4, 0), "");
+ row = si_buffer_load_const(ctx, desc, offset);
+ row = ac_to_integer(&ctx->ac, row);
+ bit = LLVMBuildLShr(builder, row, address[0], "");
+ bit = LLVMBuildTrunc(builder, bit, ctx->i1, "");
+ ac_build_kill_if_false(&ctx->ac, bit);
+}
+
+static void si_llvm_emit_kill(struct ac_shader_abi *abi, LLVMValueRef visible)
+{
+ struct si_shader_context *ctx = si_shader_context_from_abi(abi);
+ LLVMBuilderRef builder = ctx->ac.builder;
+
+ if (ctx->shader->selector->force_correct_derivs_after_kill) {
+ /* Kill immediately while maintaining WQM. */
+ ac_build_kill_if_false(&ctx->ac,
+ ac_build_wqm_vote(&ctx->ac, visible));
+
+ LLVMValueRef mask = LLVMBuildLoad(builder, ctx->postponed_kill, "");
+ mask = LLVMBuildAnd(builder, mask, visible, "");
+ LLVMBuildStore(builder, mask, ctx->postponed_kill);
+ return;
+ }
+
+ ac_build_kill_if_false(&ctx->ac, visible);
+}
+
+/**
+ * Build the pixel shader prolog function. This handles:
+ * - two-side color selection and interpolation
+ * - overriding interpolation parameters for the API PS
+ * - polygon stippling
+ *
+ * All preloaded SGPRs and VGPRs are passed through unmodified unless they are
+ * overriden by other states. (e.g. per-sample interpolation)
+ * Interpolated colors are stored after the preloaded VGPRs.
+ */
+void si_llvm_build_ps_prolog(struct si_shader_context *ctx,
+ union si_shader_part_key *key)
+{
+ LLVMValueRef ret, func;
+ int num_returns, i, num_color_channels;
+
+ memset(&ctx->args, 0, sizeof(ctx->args));
+
+ /* Declare inputs. */
+ LLVMTypeRef return_types[AC_MAX_ARGS];
+ num_returns = 0;
+ num_color_channels = util_bitcount(key->ps_prolog.colors_read);
+ assert(key->ps_prolog.num_input_sgprs +
+ key->ps_prolog.num_input_vgprs +
+ num_color_channels <= AC_MAX_ARGS);
+ for (i = 0; i < key->ps_prolog.num_input_sgprs; i++) {
+ ac_add_arg(&ctx->args, AC_ARG_SGPR, 1, AC_ARG_INT, NULL);
+ return_types[num_returns++] = ctx->i32;
+
+ }
+
+ struct ac_arg pos_fixed_pt;
+ struct ac_arg ancillary;
+ struct ac_arg param_sample_mask;
+ for (i = 0; i < key->ps_prolog.num_input_vgprs; i++) {
+ struct ac_arg *arg = NULL;
+ if (i == key->ps_prolog.ancillary_vgpr_index) {
+ arg = &ancillary;
+ } else if (i == key->ps_prolog.ancillary_vgpr_index + 1) {
+ arg = ¶m_sample_mask;
+ } else if (i == key->ps_prolog.num_input_vgprs - 1) {
+ /* POS_FIXED_PT is always last. */
+ arg = &pos_fixed_pt;
+ }
+ ac_add_arg(&ctx->args, AC_ARG_VGPR, 1, AC_ARG_FLOAT, arg);
+ return_types[num_returns++] = ctx->f32;
+ }
+
+ /* Declare outputs (same as inputs + add colors if needed) */
+ for (i = 0; i < num_color_channels; i++)
+ return_types[num_returns++] = ctx->f32;
+
+ /* Create the function. */
+ si_llvm_create_func(ctx, "ps_prolog", return_types, num_returns, 0);
+ func = ctx->main_fn;
+
+ /* Copy inputs to outputs. This should be no-op, as the registers match,
+ * but it will prevent the compiler from overwriting them unintentionally.
+ */
+ ret = ctx->return_value;
+ for (i = 0; i < ctx->args.arg_count; i++) {
+ LLVMValueRef p = LLVMGetParam(func, i);
+ ret = LLVMBuildInsertValue(ctx->ac.builder, ret, p, i, "");
+ }
+
+ /* Polygon stippling. */
+ if (key->ps_prolog.states.poly_stipple) {
+ LLVMValueRef list = si_prolog_get_rw_buffers(ctx);
+
+ si_llvm_emit_polygon_stipple(ctx, list, pos_fixed_pt);
+ }
+
+ if (key->ps_prolog.states.bc_optimize_for_persp ||
+ key->ps_prolog.states.bc_optimize_for_linear) {
+ unsigned i, base = key->ps_prolog.num_input_sgprs;
+ LLVMValueRef center[2], centroid[2], tmp, bc_optimize;
+
+ /* The shader should do: if (PRIM_MASK[31]) CENTROID = CENTER;
+ * The hw doesn't compute CENTROID if the whole wave only
+ * contains fully-covered quads.
+ *
+ * PRIM_MASK is after user SGPRs.
+ */
+ bc_optimize = LLVMGetParam(func, SI_PS_NUM_USER_SGPR);
+ bc_optimize = LLVMBuildLShr(ctx->ac.builder, bc_optimize,
+ LLVMConstInt(ctx->i32, 31, 0), "");
+ bc_optimize = LLVMBuildTrunc(ctx->ac.builder, bc_optimize,
+ ctx->i1, "");
+
+ if (key->ps_prolog.states.bc_optimize_for_persp) {
+ /* Read PERSP_CENTER. */
+ for (i = 0; i < 2; i++)
+ center[i] = LLVMGetParam(func, base + 2 + i);
+ /* Read PERSP_CENTROID. */
+ for (i = 0; i < 2; i++)
+ centroid[i] = LLVMGetParam(func, base + 4 + i);
+ /* Select PERSP_CENTROID. */
+ for (i = 0; i < 2; i++) {
+ tmp = LLVMBuildSelect(ctx->ac.builder, bc_optimize,
+ center[i], centroid[i], "");
+ ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
+ tmp, base + 4 + i, "");
+ }
+ }
+ if (key->ps_prolog.states.bc_optimize_for_linear) {
+ /* Read LINEAR_CENTER. */
+ for (i = 0; i < 2; i++)
+ center[i] = LLVMGetParam(func, base + 8 + i);
+ /* Read LINEAR_CENTROID. */
+ for (i = 0; i < 2; i++)
+ centroid[i] = LLVMGetParam(func, base + 10 + i);
+ /* Select LINEAR_CENTROID. */
+ for (i = 0; i < 2; i++) {
+ tmp = LLVMBuildSelect(ctx->ac.builder, bc_optimize,
+ center[i], centroid[i], "");
+ ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
+ tmp, base + 10 + i, "");
+ }
+ }
+ }
+
+ /* Force per-sample interpolation. */
+ if (key->ps_prolog.states.force_persp_sample_interp) {
+ unsigned i, base = key->ps_prolog.num_input_sgprs;
+ LLVMValueRef persp_sample[2];
+
+ /* Read PERSP_SAMPLE. */
+ for (i = 0; i < 2; i++)
+ persp_sample[i] = LLVMGetParam(func, base + i);
+ /* Overwrite PERSP_CENTER. */
+ for (i = 0; i < 2; i++)
+ ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
+ persp_sample[i], base + 2 + i, "");
+ /* Overwrite PERSP_CENTROID. */
+ for (i = 0; i < 2; i++)
+ ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
+ persp_sample[i], base + 4 + i, "");
+ }
+ if (key->ps_prolog.states.force_linear_sample_interp) {
+ unsigned i, base = key->ps_prolog.num_input_sgprs;
+ LLVMValueRef linear_sample[2];
+
+ /* Read LINEAR_SAMPLE. */
+ for (i = 0; i < 2; i++)
+ linear_sample[i] = LLVMGetParam(func, base + 6 + i);
+ /* Overwrite LINEAR_CENTER. */
+ for (i = 0; i < 2; i++)
+ ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
+ linear_sample[i], base + 8 + i, "");
+ /* Overwrite LINEAR_CENTROID. */
+ for (i = 0; i < 2; i++)
+ ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
+ linear_sample[i], base + 10 + i, "");
+ }
+
+ /* Force center interpolation. */
+ if (key->ps_prolog.states.force_persp_center_interp) {
+ unsigned i, base = key->ps_prolog.num_input_sgprs;
+ LLVMValueRef persp_center[2];
+
+ /* Read PERSP_CENTER. */
+ for (i = 0; i < 2; i++)
+ persp_center[i] = LLVMGetParam(func, base + 2 + i);
+ /* Overwrite PERSP_SAMPLE. */
+ for (i = 0; i < 2; i++)
+ ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
+ persp_center[i], base + i, "");
+ /* Overwrite PERSP_CENTROID. */
+ for (i = 0; i < 2; i++)
+ ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
+ persp_center[i], base + 4 + i, "");
+ }
+ if (key->ps_prolog.states.force_linear_center_interp) {
+ unsigned i, base = key->ps_prolog.num_input_sgprs;
+ LLVMValueRef linear_center[2];
+
+ /* Read LINEAR_CENTER. */
+ for (i = 0; i < 2; i++)
+ linear_center[i] = LLVMGetParam(func, base + 8 + i);
+ /* Overwrite LINEAR_SAMPLE. */
+ for (i = 0; i < 2; i++)
+ ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
+ linear_center[i], base + 6 + i, "");
+ /* Overwrite LINEAR_CENTROID. */
+ for (i = 0; i < 2; i++)
+ ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
+ linear_center[i], base + 10 + i, "");
+ }
+
+ /* Interpolate colors. */
+ unsigned color_out_idx = 0;
+ for (i = 0; i < 2; i++) {
+ unsigned writemask = (key->ps_prolog.colors_read >> (i * 4)) & 0xf;
+ unsigned face_vgpr = key->ps_prolog.num_input_sgprs +
+ key->ps_prolog.face_vgpr_index;
+ LLVMValueRef interp[2], color[4];
+ LLVMValueRef interp_ij = NULL, prim_mask = NULL, face = NULL;
+
+ if (!writemask)
+ continue;
+
+ /* If the interpolation qualifier is not CONSTANT (-1). */
+ if (key->ps_prolog.color_interp_vgpr_index[i] != -1) {
+ unsigned interp_vgpr = key->ps_prolog.num_input_sgprs +
+ key->ps_prolog.color_interp_vgpr_index[i];
+
+ /* Get the (i,j) updated by bc_optimize handling. */
+ interp[0] = LLVMBuildExtractValue(ctx->ac.builder, ret,
+ interp_vgpr, "");
+ interp[1] = LLVMBuildExtractValue(ctx->ac.builder, ret,
+ interp_vgpr + 1, "");
+ interp_ij = ac_build_gather_values(&ctx->ac, interp, 2);
+ }
+
+ /* Use the absolute location of the input. */
+ prim_mask = LLVMGetParam(func, SI_PS_NUM_USER_SGPR);
+
+ if (key->ps_prolog.states.color_two_side) {
+ face = LLVMGetParam(func, face_vgpr);
+ face = ac_to_integer(&ctx->ac, face);
+ }
+
+ interp_fs_color(ctx,
+ key->ps_prolog.color_attr_index[i], i,
+ key->ps_prolog.num_interp_inputs,
+ key->ps_prolog.colors_read, interp_ij,
+ prim_mask, face, color);
+
+ while (writemask) {
+ unsigned chan = u_bit_scan(&writemask);
+ ret = LLVMBuildInsertValue(ctx->ac.builder, ret, color[chan],
+ ctx->args.arg_count + color_out_idx++, "");
+ }
+ }
+
+ /* Section 15.2.2 (Shader Inputs) of the OpenGL 4.5 (Core Profile) spec
+ * says:
+ *
+ * "When per-sample shading is active due to the use of a fragment
+ * input qualified by sample or due to the use of the gl_SampleID
+ * or gl_SamplePosition variables, only the bit for the current
+ * sample is set in gl_SampleMaskIn. When state specifies multiple
+ * fragment shader invocations for a given fragment, the sample
+ * mask for any single fragment shader invocation may specify a
+ * subset of the covered samples for the fragment. In this case,
+ * the bit corresponding to each covered sample will be set in
+ * exactly one fragment shader invocation."
+ *
+ * The samplemask loaded by hardware is always the coverage of the
+ * entire pixel/fragment, so mask bits out based on the sample ID.
+ */
+ if (key->ps_prolog.states.samplemask_log_ps_iter) {
+ /* The bit pattern matches that used by fixed function fragment
+ * processing. */
+ static const uint16_t ps_iter_masks[] = {
+ 0xffff, /* not used */
+ 0x5555,
+ 0x1111,
+ 0x0101,
+ 0x0001,
+ };
+ assert(key->ps_prolog.states.samplemask_log_ps_iter < ARRAY_SIZE(ps_iter_masks));
+
+ uint32_t ps_iter_mask = ps_iter_masks[key->ps_prolog.states.samplemask_log_ps_iter];
+ LLVMValueRef sampleid = si_unpack_param(ctx, ancillary, 8, 4);
+ LLVMValueRef samplemask = ac_get_arg(&ctx->ac, param_sample_mask);
+
+ samplemask = ac_to_integer(&ctx->ac, samplemask);
+ samplemask = LLVMBuildAnd(
+ ctx->ac.builder,
+ samplemask,
+ LLVMBuildShl(ctx->ac.builder,
+ LLVMConstInt(ctx->i32, ps_iter_mask, false),
+ sampleid, ""),
+ "");
+ samplemask = ac_to_float(&ctx->ac, samplemask);
+
+ ret = LLVMBuildInsertValue(ctx->ac.builder, ret, samplemask,
+ param_sample_mask.arg_index, "");
+ }
+
+ /* Tell LLVM to insert WQM instruction sequence when needed. */
+ if (key->ps_prolog.wqm) {
+ LLVMAddTargetDependentFunctionAttr(func,
+ "amdgpu-ps-wqm-outputs", "");
+ }
+
+ si_llvm_build_ret(ctx, ret);
+}
+
+/**
+ * Build the pixel shader epilog function. This handles everything that must be
+ * emulated for pixel shader exports. (alpha-test, format conversions, etc)
+ */
+void si_llvm_build_ps_epilog(struct si_shader_context *ctx,
+ union si_shader_part_key *key)
+{
+ LLVMValueRef depth = NULL, stencil = NULL, samplemask = NULL;
+ int i;
+ struct si_ps_exports exp = {};
+
+ memset(&ctx->args, 0, sizeof(ctx->args));
+
+ /* Declare input SGPRs. */
+ ac_add_arg(&ctx->args, AC_ARG_SGPR, 1, AC_ARG_INT, &ctx->rw_buffers);
+ ac_add_arg(&ctx->args, AC_ARG_SGPR, 1, AC_ARG_INT,
+ &ctx->bindless_samplers_and_images);
+ ac_add_arg(&ctx->args, AC_ARG_SGPR, 1, AC_ARG_INT,
+ &ctx->const_and_shader_buffers);
+ ac_add_arg(&ctx->args, AC_ARG_SGPR, 1, AC_ARG_INT,
+ &ctx->samplers_and_images);
+ si_add_arg_checked(&ctx->args, AC_ARG_SGPR, 1, AC_ARG_FLOAT,
+ NULL, SI_PARAM_ALPHA_REF);
+
+ /* Declare input VGPRs. */
+ unsigned required_num_params =
+ ctx->args.num_sgprs_used +
+ util_bitcount(key->ps_epilog.colors_written) * 4 +
+ key->ps_epilog.writes_z +
+ key->ps_epilog.writes_stencil +
+ key->ps_epilog.writes_samplemask;
+
+ required_num_params = MAX2(required_num_params,
+ ctx->args.num_sgprs_used + PS_EPILOG_SAMPLEMASK_MIN_LOC + 1);
+
+ while (ctx->args.arg_count < required_num_params)
+ ac_add_arg(&ctx->args, AC_ARG_VGPR, 1, AC_ARG_FLOAT, NULL);
+
+ /* Create the function. */
+ si_llvm_create_func(ctx, "ps_epilog", NULL, 0, 0);
+ /* Disable elimination of unused inputs. */
+ ac_llvm_add_target_dep_function_attr(ctx->main_fn,
+ "InitialPSInputAddr", 0xffffff);
+
+ /* Process colors. */
+ unsigned vgpr = ctx->args.num_sgprs_used;
+ unsigned colors_written = key->ps_epilog.colors_written;
+ int last_color_export = -1;
+
+ /* Find the last color export. */
+ if (!key->ps_epilog.writes_z &&
+ !key->ps_epilog.writes_stencil &&
+ !key->ps_epilog.writes_samplemask) {
+ unsigned spi_format = key->ps_epilog.states.spi_shader_col_format;
+
+ /* If last_cbuf > 0, FS_COLOR0_WRITES_ALL_CBUFS is true. */
+ if (colors_written == 0x1 && key->ps_epilog.states.last_cbuf > 0) {
+ /* Just set this if any of the colorbuffers are enabled. */
+ if (spi_format &
+ ((1ull << (4 * (key->ps_epilog.states.last_cbuf + 1))) - 1))
+ last_color_export = 0;
+ } else {
+ for (i = 0; i < 8; i++)
+ if (colors_written & (1 << i) &&
+ (spi_format >> (i * 4)) & 0xf)
+ last_color_export = i;
+ }
+ }
+
+ while (colors_written) {
+ LLVMValueRef color[4];
+ int mrt = u_bit_scan(&colors_written);
+
+ for (i = 0; i < 4; i++)
+ color[i] = LLVMGetParam(ctx->main_fn, vgpr++);
+
+ si_export_mrt_color(ctx, color, mrt,
+ ctx->args.arg_count - 1,
+ mrt == last_color_export, &exp);
+ }
+
+ /* Process depth, stencil, samplemask. */
+ if (key->ps_epilog.writes_z)
+ depth = LLVMGetParam(ctx->main_fn, vgpr++);
+ if (key->ps_epilog.writes_stencil)
+ stencil = LLVMGetParam(ctx->main_fn, vgpr++);
+ if (key->ps_epilog.writes_samplemask)
+ samplemask = LLVMGetParam(ctx->main_fn, vgpr++);
+
+ if (depth || stencil || samplemask)
+ si_export_mrt_z(ctx, depth, stencil, samplemask, &exp);
+ else if (last_color_export == -1)
+ ac_build_export_null(&ctx->ac);
+
+ if (exp.num)
+ si_emit_ps_exports(ctx, &exp);
+
+ /* Compile. */
+ LLVMBuildRetVoid(ctx->ac.builder);
+}
+
+void si_llvm_build_monolithic_ps(struct si_shader_context *ctx,
+ struct si_shader *shader)
+{
+ LLVMValueRef parts[3];
+ unsigned num_parts = 0, main_index;
+
+ union si_shader_part_key prolog_key;
+ si_get_ps_prolog_key(shader, &prolog_key, false);
+
+ if (si_need_ps_prolog(&prolog_key)) {
+ si_llvm_build_ps_prolog(ctx, &prolog_key);
+ parts[num_parts++] = ctx->main_fn;
+ }
+
+ main_index = num_parts;
+ parts[num_parts++] = ctx->main_fn;
+
+ union si_shader_part_key epilog_key;
+ si_get_ps_epilog_key(shader, &epilog_key);
+ si_llvm_build_ps_epilog(ctx, &epilog_key);
+ parts[num_parts++] = ctx->main_fn;
+
+ si_build_wrapper_function(ctx, parts, num_parts, main_index, 0);
+}
+
+void si_llvm_init_ps_callbacks(struct si_shader_context *ctx)
+{
+ ctx->abi.emit_outputs = si_llvm_return_fs_outputs;
+ ctx->abi.load_sample_position = load_sample_position;
+ ctx->abi.load_sample_mask_in = load_sample_mask_in;
+ ctx->abi.emit_fbfetch = si_nir_emit_fbfetch;
+ ctx->abi.emit_kill = si_llvm_emit_kill;
+}
projects / mesa.git / commitdiff