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ac: add support for explicit component packing

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This is needed for RADV to support explicit component packing.

This is also required to use the new NIR component splitting /
packing passes.

V2:
 - add commponent packing support for interpolate_at* intrinsics
 - improve store packing support when not all varyings are scalar
   as spotted by Bas the store source was incorrectly offset.

Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
This commit is contained in:
Timothy Arceri 2017-10-05 11:44:39 +11:00
parent e0e0666584
commit 8ebaf8192a
1 changed files with 52 additions and 16 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

68
src/amd/common/ac_nir_to_llvm.c
View file

@ -1067,7 +1067,6 @@ static LLVMValueRef llvm_extract_elem(struct ac_llvm_context *ac,
{
int count = get_llvm_num_components(value);
assert(index < count);
if (count == 1)
return value;
@ -2817,6 +2816,28 @@ get_dw_address(struct nir_to_llvm_context *ctx,
return dw_addr;
}
static LLVMValueRef
build_varying_gather_values(struct ac_llvm_context *ctx, LLVMValueRef *values,
unsigned value_count, unsigned component)
{
LLVMValueRef vec = NULL;
if (value_count == 1) {
return values[component];
} else if (!value_count)
unreachable("value_count is 0");
for (unsigned i = component; i < value_count + component; i++) {
LLVMValueRef value = values[i];
if (!i)
vec = LLVMGetUndef( LLVMVectorType(LLVMTypeOf(value), value_count));
LLVMValueRef index = LLVMConstInt(ctx->i32, i - component, false);
vec = LLVMBuildInsertElement(ctx->builder, vec, value, index, "");
}
return vec;
}
static LLVMValueRef
load_tcs_input(struct nir_to_llvm_context *ctx,
nir_intrinsic_instr *instr)
@ -2839,12 +2860,13 @@ load_tcs_input(struct nir_to_llvm_context *ctx,
dw_addr = get_dw_address(ctx, dw_addr, param, const_index, is_compact, vertex_index, stride,
indir_index);
for (unsigned i = 0; i < instr->num_components; i++) {
unsigned comp = instr->variables[0]->var->data.location_frac;
for (unsigned i = 0; i < instr->num_components + comp; i++) {
value[i] = lds_load(ctx, dw_addr);
dw_addr = LLVMBuildAdd(ctx->builder, dw_addr,
ctx->i32one, "");
}
result = ac_build_gather_values(&ctx->ac, value, instr->num_components);
result = build_varying_gather_values(&ctx->ac, value, instr->num_components, comp);
result = LLVMBuildBitCast(ctx->builder, result, get_def_type(ctx->nir, &instr->dest.ssa), "");
return result;
}
@ -2877,12 +2899,13 @@ load_tcs_output(struct nir_to_llvm_context *ctx,
dw_addr = get_dw_address(ctx, dw_addr, param, const_index, is_compact, vertex_index, stride,
indir_index);
for (unsigned i = 0; i < instr->num_components; i++) {
unsigned comp = instr->variables[0]->var->data.location_frac;
for (unsigned i = comp; i < instr->num_components + comp; i++) {
value[i] = lds_load(ctx, dw_addr);
dw_addr = LLVMBuildAdd(ctx->builder, dw_addr,
ctx->i32one, "");
}
result = ac_build_gather_values(&ctx->ac, value, instr->num_components);
result = build_varying_gather_values(&ctx->ac, value, instr->num_components, comp);
result = LLVMBuildBitCast(ctx->builder, result, get_def_type(ctx->nir, &instr->dest.ssa), "");
return result;
}
@ -2900,6 +2923,7 @@ store_tcs_output(struct nir_to_llvm_context *ctx,
LLVMValueRef indir_index = NULL;
unsigned const_index = 0;
unsigned param;
const unsigned comp = instr->variables[0]->var->data.location_frac;
const bool per_vertex = nir_is_per_vertex_io(instr->variables[0]->var, ctx->stage);
const bool is_compact = instr->variables[0]->var->data.compact;
@ -2937,7 +2961,7 @@ store_tcs_output(struct nir_to_llvm_context *ctx,
for (unsigned chan = 0; chan < 8; chan++) {
if (!(writemask & (1 << chan)))
continue;
LLVMValueRef value = llvm_extract_elem(&ctx->ac, src, chan);
LLVMValueRef value = llvm_extract_elem(&ctx->ac, src, chan - comp);
lds_store(ctx, dw_addr, value);
@ -2979,9 +3003,14 @@ load_tes_input(struct nir_to_llvm_context *ctx,
const_index -= 3;
param++;
}
unsigned comp = instr->variables[0]->var->data.location_frac;
buf_addr = get_tcs_tes_buffer_address_params(ctx, param, const_index,
is_compact, vertex_index, indir_index);
LLVMValueRef comp_offset = LLVMConstInt(ctx->i32, comp * 4, false);
buf_addr = LLVMBuildAdd(ctx->builder, buf_addr, comp_offset, "");
result = ac_build_buffer_load(&ctx->ac, ctx->hs_ring_tess_offchip, instr->num_components, NULL,
buf_addr, ctx->oc_lds, is_compact ? (4 * const_index) : 0, 1, 0, true, false);
result = trim_vector(&ctx->ac, result, instr->num_components);
@ -3008,7 +3037,9 @@ load_gs_input(struct nir_to_llvm_context *ctx,
LLVMConstInt(ctx->i32, 4, false), "");
param = shader_io_get_unique_index(instr->variables[0]->var->data.location);
for (unsigned i = 0; i < instr->num_components; i++) {
unsigned comp = instr->variables[0]->var->data.location_frac;
for (unsigned i = comp; i < instr->num_components + comp; i++) {
if (ctx->ac.chip_class >= GFX9) {
LLVMValueRef dw_addr = ctx->gs_vtx_offset[vtx_offset_param];
dw_addr = LLVMBuildAdd(ctx->ac.builder, dw_addr,
@ -3031,7 +3062,7 @@ load_gs_input(struct nir_to_llvm_context *ctx,
AC_FUNC_ATTR_LEGACY);
}
}
result = ac_build_gather_values(&ctx->ac, value, instr->num_components);
result = build_varying_gather_values(&ctx->ac, value, instr->num_components, comp);
return result;
}
@ -3081,6 +3112,7 @@ static LLVMValueRef visit_load_var(struct ac_nir_context *ctx,
LLVMValueRef values[8];
int idx = instr->variables[0]->var->data.driver_location;
int ve = instr->dest.ssa.num_components;
unsigned comp = instr->variables[0]->var->data.location_frac;
LLVMValueRef indir_index;
LLVMValueRef ret;
unsigned const_index;
@ -3101,7 +3133,8 @@ static LLVMValueRef visit_load_var(struct ac_nir_context *ctx,
if (ctx->stage == MESA_SHADER_GEOMETRY) {
return load_gs_input(ctx->nctx, instr);
}
for (unsigned chan = 0; chan < ve; chan++) {
for (unsigned chan = comp; chan < ve + comp; chan++) {
if (indir_index) {
unsigned count = glsl_count_attribute_slots(
instr->variables[0]->var->type,
@ -3147,7 +3180,8 @@ static LLVMValueRef visit_load_var(struct ac_nir_context *ctx,
case nir_var_shader_out:
if (ctx->stage == MESA_SHADER_TESS_CTRL)
return load_tcs_output(ctx->nctx, instr);
for (unsigned chan = 0; chan < ve; chan++) {
for (unsigned chan = comp; chan < ve + comp; chan++) {
if (indir_index) {
unsigned count = glsl_count_attribute_slots(
instr->variables[0]->var->type, false);
@ -3169,7 +3203,7 @@ static LLVMValueRef visit_load_var(struct ac_nir_context *ctx,
default:
unreachable("unhandle variable mode");
}
ret = ac_build_gather_values(&ctx->ac, values, ve);
ret = build_varying_gather_values(&ctx->ac, values, ve, comp);
return LLVMBuildBitCast(ctx->ac.builder, ret, get_def_type(ctx, &instr->dest.ssa), "");
}
@ -3179,8 +3213,9 @@ visit_store_var(struct ac_nir_context *ctx,
{
LLVMValueRef temp_ptr, value;
int idx = instr->variables[0]->var->data.driver_location;
unsigned comp = instr->variables[0]->var->data.location_frac;
LLVMValueRef src = ac_to_float(&ctx->ac, get_src(ctx, instr->src[0]));
int writemask = instr->const_index[0];
int writemask = instr->const_index[0] << comp;
LLVMValueRef indir_index;
unsigned const_index;
get_deref_offset(ctx, instr->variables[0], false,
@ -3213,7 +3248,7 @@ visit_store_var(struct ac_nir_context *ctx,
if (!(writemask & (1 << chan)))
continue;
value = llvm_extract_elem(&ctx->ac, src, chan);
value = llvm_extract_elem(&ctx->ac, src, chan - comp);
if (instr->variables[0]->var->data.compact)
stride = 1;
@ -3910,7 +3945,7 @@ static LLVMValueRef load_sample_pos(struct ac_nir_context *ctx)
static LLVMValueRef visit_interp(struct nir_to_llvm_context *ctx,
const nir_intrinsic_instr *instr)
{
LLVMValueRef result[2];
LLVMValueRef result[4];
LLVMValueRef interp_param, attr_number;
unsigned location;
unsigned chan;
@ -3988,7 +4023,7 @@ static LLVMValueRef visit_interp(struct nir_to_llvm_context *ctx,
}
for (chan = 0; chan < 2; chan++) {
for (chan = 0; chan < 4; chan++) {
LLVMValueRef llvm_chan = LLVMConstInt(ctx->i32, chan, false);
if (interp_param) {
@ -4009,7 +4044,8 @@ static LLVMValueRef visit_interp(struct nir_to_llvm_context *ctx,
ctx->prim_mask);
}
}
return ac_build_gather_values(&ctx->ac, result, 2);
return build_varying_gather_values(&ctx->ac, result, instr->num_components,
instr->variables[0]->var->data.location_frac);
}
static void