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agc: new abi

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This commit is contained in:
nmzik
2026-08-09 01:32:32 +02:00
parent a4da2a9f00
commit e3890febaa
5 changed files with 100 additions and 1 deletions
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src/libs/agc.cpp
+91 -1
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@@ -26,6 +26,7 @@
#include <algorithm>
#include <atomic>
#include <cmath>
#include <cstddef>
#include <cstring>
#include <mutex>
@@ -1180,6 +1181,95 @@ int KYTY_SYSV_ABI GraphicsUpdatePrimState(ShaderRegister* cx_regs, ShaderRegiste
return OK;
}
struct GsOccupancyLimits {
uint32_t vertex;
uint32_t export_count;
};
static GsOccupancyLimits get_gs_occupancy_limits(const Shader* gs, uint32_t vertex_capacity,
uint32_t export_capacity) {
const auto* onchip =
find_shader_register(gs->cx_registers, gs->num_cx_registers, Pm4::VGT_GS_ONCHIP_CNTL);
const auto* subgroup =
find_shader_register(gs->cx_registers, gs->num_cx_registers, Pm4::GE_NGG_SUBGRP_CNTL);
const auto* vs_out =
find_shader_register(gs->cx_registers, gs->num_cx_registers, Pm4::SPI_VS_OUT_CONFIG);
const auto* cl_out =
find_shader_register(gs->cx_registers, gs->num_cx_registers, Pm4::PA_CL_VS_OUT_CNTL);
const auto* max_output = find_shader_register(gs->cx_registers, gs->num_cx_registers,
Pm4::GE_MAX_OUTPUT_PER_SUBGROUP);
const uint32_t output_words = ((max_output->value & 0x3ffu) + 31u) >> 5u;
const uint32_t subgroup_work =
((((onchip->value >> 11u) & 0x7ffu) * (subgroup->value & 0x1ffu)) + 31u) >> 5u;
uint32_t waves = std::max(subgroup_work, output_words);
if ((gs->specials->vgt_shader_stages_en.value & 0x00400000u) == 0) {
waves >>= 1u;
}
waves = std::max(waves, 1u);
const uint32_t exports = 1u + ((cl_out->value >> 21u) & 1u) + ((cl_out->value >> 22u) & 1u) +
((cl_out->value >> 23u) & 1u);
const uint32_t export_limit = (export_capacity / exports) * 4u;
const uint32_t vertex_limit = (vs_out->value & 0x80u) != 0
? 2048u
: vertex_capacity / (((vs_out->value >> 2u) & 0xfu) + 1u);
return {waves * (vertex_limit / output_words), waves * (export_limit / output_words)};
}
int KYTY_SYSV_ABI GraphicsGetGsOversubscription(ShaderRegister* regs, const Shader* gs,
uint32_t budget, float factor) {
PRINT_NAME();
constexpr uint32_t FULL_PC_OVERSUBSCRIPTION = 0x7ffu;
constexpr uint32_t FULL_SH_OVERSUBSCRIPTION = 0x007f0000u;
regs[0] = {Pm4::GE_PC_ALLOC, 0u};
regs[1] = {Pm4::SPI_SHADER_PGM_RSRC4_GS, 0u};
if (budget == 0u) {
return OK;
}
if (budget == UINT32_MAX) {
regs[0].value |= FULL_PC_OVERSUBSCRIPTION;
regs[1].value |= FULL_SH_OVERSUBSCRIPTION;
return OK;
}
const auto base = get_gs_occupancy_limits(gs, 1024u, 128u);
const auto expanded = get_gs_occupancy_limits(gs, 2048u, 382u);
const auto base_min = std::min(base.vertex, base.export_count);
const auto limit_shift =
(gs->specials->vgt_shader_stages_en.value & 0x00400000u) != 0 ? 5u : 6u;
const auto expanded_limit =
std::min({expanded.vertex, expanded.export_count, budget >> limit_shift, 1024u});
const auto headroom = expanded_limit > base_min ? expanded_limit - base_min : 0u;
const auto target = static_cast<uint32_t>(
std::fma(factor, static_cast<float>(headroom), static_cast<float>(base_min)));
if (target <= base_min) {
return OK;
}
if (target < base.export_count) {
const auto range = std::max(expanded.vertex - base.vertex, 1u);
auto value = static_cast<uint32_t>(
std::min((static_cast<uint64_t>(target - base.vertex) << 10u) / range, 1024ull));
value = std::max(value, 1u);
regs[0].value = (regs[0].value & ~FULL_PC_OVERSUBSCRIPTION) |
(((value << 1u) - 1u) & FULL_PC_OVERSUBSCRIPTION);
regs[1].value |= FULL_SH_OVERSUBSCRIPTION;
} else {
const auto range = std::max(expanded.export_count - base.export_count, 1u);
const auto value = static_cast<uint32_t>(
std::min((static_cast<uint64_t>(target - base.export_count) * 127u) / range, 127ull));
regs[0].value |= FULL_PC_OVERSUBSCRIPTION;
regs[1].value = (regs[1].value & ~FULL_SH_OVERSUBSCRIPTION) | (value << 16u);
}
return OK;
}
static uint32_t shader_semantic_word(const ShaderSemantic& semantic) {
return ((semantic.semantic & 0xffu) << 0u) | ((semantic.hardware_mapping & 0xffu) << 8u) |
((semantic.size_in_elements & 0xfu) << 16u) | ((semantic.is_f16 & 0x3u) << 20u) |
@@ -1466,7 +1556,7 @@ uint32_t* KYTY_SYSV_ABI GraphicsDcbContextStateOp(CommandBuffer* buf, uint32_t o
buf->DbgDump();
uint32_t* first = nullptr;
uint32_t* first = nullptr;
const auto append = [&](uint32_t segment_size_dw) {
auto* segment = buf->AllocateDW(segment_size_dw);
if (segment == nullptr) {