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glsl: Implement Load/WriteGlobal

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along with some other misc changes and fixes
This commit is contained in:
ameerj 2021-06-03 19:15:36 -04:00
parent af9696059c
commit 8d8ce24f20
9 changed files with 185 additions and 98 deletions
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86
src/shader_recompiler/backend/glsl/emit_context.cpp
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@ -9,6 +9,14 @@
namespace Shader::Backend::GLSL {
namespace {
u32 CbufIndex(u32 offset) {
return (offset / 4) % 4;
}
char OffsetSwizzle(u32 offset) {
return "xyzw"[CbufIndex(offset)];
}
std::string_view InterpDecorator(Interpolation interp) {
switch (interp) {
case Interpolation::Smooth:
@ -382,6 +390,8 @@ void EmitContext::DefineGenericOutput(size_t index, u32 invocations) {
}
void EmitContext::DefineHelperFunctions() {
header += "\n#define ftoi floatBitsToInt\n#define ftou floatBitsToUint\n"
"#define itof intBitsToFloat\n#define utof uintBitsToFloat\n";
if (info.uses_global_increment || info.uses_shared_increment) {
header += "uint CasIncrement(uint op_a,uint op_b){return(op_a>=op_b)?0u:(op_a+1u);}\n";
}
@ -391,7 +401,7 @@ void EmitContext::DefineHelperFunctions() {
}
if (info.uses_atomic_f32_add) {
header += "uint CasFloatAdd(uint op_a,float op_b){return "
"floatBitsToUint(uintBitsToFloat(op_a)+op_b);}\n";
"ftou(utof(op_a)+op_b);}\n";
}
if (info.uses_atomic_f32x2_add) {
header += "uint CasFloatAdd32x2(uint op_a,vec2 op_b){return "
@ -423,6 +433,80 @@ void EmitContext::DefineHelperFunctions() {
if (info.uses_atomic_s32_max) {
header += "uint CasMaxS32(uint op_a,uint op_b){return uint(max(int(op_a),int(op_b)));}";
}
if (info.uses_global_memory) {
std::string write_func{"void WriteGlobal32(uint64_t addr,uint data){\n"};
std::string write_func_64{"void WriteGlobal64(uint64_t addr,uvec2 data){\n"};
std::string write_func_128{"void WriteGlobal128(uint64_t addr,uvec4 data){\n"};
std::string load_func{"uint LoadGlobal32(uint64_t addr){\n"};
std::string load_func_64{"uvec2 LoadGlobal64(uint64_t addr){\n"};
std::string load_func_128{"uvec4 LoadGlobal128(uint64_t addr){\n"};
const size_t num_buffers{info.storage_buffers_descriptors.size()};
for (size_t index = 0; index < num_buffers; ++index) {
if (!info.nvn_buffer_used[index]) {
continue;
}
const auto& ssbo{info.storage_buffers_descriptors[index]};
const u32 size_cbuf_offset{ssbo.cbuf_offset + 8};
const auto ssbo_addr{fmt::format("ssbo_addr{}", index)};
const auto cbuf{fmt::format("{}_cbuf{}", stage_name, ssbo.cbuf_index)};
const auto cbuf_value{fmt::format(
"uint64_t {}=packUint2x32(uvec2(ftou({}[{}].{}),ftou({}[{}].{})));", ssbo_addr,
cbuf, ssbo.cbuf_offset / 16, OffsetSwizzle(ssbo.cbuf_offset), cbuf,
(ssbo.cbuf_offset + 4) / 16, OffsetSwizzle(ssbo.cbuf_offset + 4))};
write_func += cbuf_value;
write_func_64 += cbuf_value;
write_func_128 += cbuf_value;
load_func += cbuf_value;
load_func_64 += cbuf_value;
load_func_128 += cbuf_value;
const auto ssbo_size{fmt::format("ftou({}[{}].{}),ftou({}[{}].{})", cbuf,
size_cbuf_offset / 16, OffsetSwizzle(size_cbuf_offset),
cbuf, (size_cbuf_offset + 4) / 16,
OffsetSwizzle(size_cbuf_offset + 4))};
const auto comparison{fmt::format("if((addr>={})&&(addr<({}+\nuint64_t(uvec2({}))))){{",
ssbo_addr, ssbo_addr, ssbo_size)};
write_func += comparison;
write_func_64 += comparison;
write_func_128 += comparison;
load_func += comparison;
load_func_64 += comparison;
load_func_128 += comparison;
const auto ssbo_name{fmt::format("{}_ssbo{}", stage_name, index)};
write_func += fmt::format("{}[uint(addr-{})>>2]=data;return;}}", ssbo_name, ssbo_addr);
write_func_64 +=
fmt::format("{}[uint(addr-{})>>2]=data.x;{}[uint(addr-{}+4)>>2]=data.y;return;}}",
ssbo_name, ssbo_addr, ssbo_name, ssbo_addr);
write_func_128 +=
fmt::format("{}[uint(addr-{})>>2]=data.x;{}[uint(addr-{}+4)>>2]=data.y;{}[uint("
"addr-{}+8)>>2]=data.z;{}[uint(addr-{}+12)>>2]=data.w;return;}}",
ssbo_name, ssbo_addr, ssbo_name, ssbo_addr, ssbo_name, ssbo_addr,
ssbo_name, ssbo_addr);
load_func += fmt::format("return {}[uint(addr-{})>>2];}}", ssbo_name, ssbo_addr);
load_func_64 +=
fmt::format("return uvec2({}[uint(addr-{})>>2],{}[uint(addr-{}+4)>>2]);}}",
ssbo_name, ssbo_addr, ssbo_name, ssbo_addr);
load_func_128 += fmt::format("return "
"uvec4({}[uint(addr-{})>>2],{}[uint(addr-{}+4)>>2],{}["
"uint(addr-{}+8)>>2],{}[uint(addr-{}+12)>>2]);}}",
ssbo_name, ssbo_addr, ssbo_name, ssbo_addr, ssbo_name,
ssbo_addr, ssbo_name, ssbo_addr);
}
write_func += "}\n";
write_func_64 += "}\n";
write_func_128 += "}\n";
load_func += "return 0u;}\n";
load_func_64 += "return uvec2(0);}\n";
load_func_128 += "return uvec4(0);}\n";
header += write_func;
header += write_func_64;
header += write_func_128;
header += load_func;
header += load_func_64;
header += load_func_128;
}
}
void EmitContext::SetupImages(Bindings& bindings) {