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Implement V_MOVREL variants (#745)

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* shader_recompiler: Implement V_MOVRELS_B32, V_MOVRELD_B32,
V_MOVRELSD_B32

Generates a ton of OpSelects to hardcode reading or writing from each
possible vgpr depending on the value of m0

Future work is to do range analysis to put an upper bound on m0 and
check fewer registers.

* fix runtime info after rebase
This commit is contained in:
baggins183 2024-09-06 13:47:47 -07:00 • committed by GitHub
parent 416e23fe76
commit bb29224daf
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GPG key ID: B5690EEEBB952194
11 changed files with 110 additions and 6 deletions
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55
src/shader_recompiler/frontend/translate/vector_alu.cpp
View file

@ -1,6 +1,7 @@
// SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "shader_recompiler/frontend/opcodes.h"
#include "shader_recompiler/frontend/translate/translate.h"
namespace Shader::Gcn {
@ -309,6 +310,12 @@ void Translator::EmitVectorAlu(const GcnInst& inst) {
return V_MBCNT_U32_B32(true, inst);
case Opcode::V_MBCNT_HI_U32_B32:
return V_MBCNT_U32_B32(false, inst);
case Opcode::V_MOVRELS_B32:
return V_MOVRELS_B32(inst);
case Opcode::V_MOVRELD_B32:
return V_MOVRELD_B32(inst);
case Opcode::V_MOVRELSD_B32:
return V_MOVRELSD_B32(inst);
case Opcode::V_NOP:
return;
@ -990,4 +997,52 @@ void Translator::V_FFBH_U32(const GcnInst& inst) {
SetDst(inst.dst[0], IR::U32{ir.Select(cond, pos_from_left, ir.Imm32(~0U))});
}
// TODO: add range analysis pass to hopefully put an upper bound on m0, and only select one of
// [src_vgprno, src_vgprno + max_m0]. Same for dst regs we may write back to
IR::U32 Translator::VMovRelSHelper(u32 src_vgprno, const IR::U32 m0) {
// Read from VGPR0 by default when src_vgprno + m0 > num_allocated_vgprs
IR::U32 src_val = ir.GetVectorReg<IR::U32>(IR::VectorReg::V0);
for (u32 i = src_vgprno; i < runtime_info.num_allocated_vgprs; i++) {
const IR::U1 cond = ir.IEqual(m0, ir.Imm32(i - src_vgprno));
src_val =
IR::U32{ir.Select(cond, ir.GetVectorReg<IR::U32>(IR::VectorReg::V0 + i), src_val)};
}
return src_val;
}
void Translator::VMovRelDHelper(u32 dst_vgprno, const IR::U32 src_val, const IR::U32 m0) {
for (u32 i = dst_vgprno; i < runtime_info.num_allocated_vgprs; i++) {
const IR::U1 cond = ir.IEqual(m0, ir.Imm32(i - dst_vgprno));
const IR::U32 dst_val =
IR::U32{ir.Select(cond, src_val, ir.GetVectorReg<IR::U32>(IR::VectorReg::V0 + i))};
ir.SetVectorReg(IR::VectorReg::V0 + i, dst_val);
}
}
void Translator::V_MOVRELS_B32(const GcnInst& inst) {
u32 src_vgprno = inst.src[0].code - static_cast<u32>(IR::VectorReg::V0);
const IR::U32 m0 = ir.GetM0();
const IR::U32 src_val = VMovRelSHelper(src_vgprno, m0);
SetDst(inst.dst[0], src_val);
}
void Translator::V_MOVRELD_B32(const GcnInst& inst) {
const IR::U32 src_val{GetSrc(inst.src[0])};
u32 dst_vgprno = inst.dst[0].code - static_cast<u32>(IR::VectorReg::V0);
IR::U32 m0 = ir.GetM0();
VMovRelDHelper(dst_vgprno, src_val, m0);
}
void Translator::V_MOVRELSD_B32(const GcnInst& inst) {
u32 src_vgprno = inst.src[0].code - static_cast<u32>(IR::VectorReg::V0);
u32 dst_vgprno = inst.dst[0].code - static_cast<u32>(IR::VectorReg::V0);
IR::U32 m0 = ir.GetM0();
const IR::U32 src_val = VMovRelSHelper(src_vgprno, m0);
VMovRelDHelper(dst_vgprno, src_val, m0);
}
} // namespace Shader::Gcn