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authorameerj <52414509+ameerj@users.noreply.github.com>2021-03-07 20:48:03 +0100
committerameerj <52414509+ameerj@users.noreply.github.com>2021-07-23 03:51:23 +0200
commit924f0a9149b6777782347be3d2c833a5f8e90058 (patch)
tree1bd15a053df1f337410b9a9c95809c4095afa459 /src/shader_recompiler/frontend/maxwell
parentshader: Implement LEA (diff)
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Diffstat (limited to 'src/shader_recompiler/frontend/maxwell')
-rw-r--r--src/shader_recompiler/frontend/maxwell/translate/impl/integer_funnel_shift.cpp77
-rw-r--r--src/shader_recompiler/frontend/maxwell/translate/impl/not_implemented.cpp16
2 files changed, 77 insertions, 16 deletions
diff --git a/src/shader_recompiler/frontend/maxwell/translate/impl/integer_funnel_shift.cpp b/src/shader_recompiler/frontend/maxwell/translate/impl/integer_funnel_shift.cpp
new file mode 100644
index 000000000..d8d6c939e
--- /dev/null
+++ b/src/shader_recompiler/frontend/maxwell/translate/impl/integer_funnel_shift.cpp
@@ -0,0 +1,77 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/bit_field.h"
+#include "common/common_types.h"
+#include "shader_recompiler/frontend/maxwell/translate/impl/impl.h"
+
+namespace Shader::Maxwell {
+namespace {
+enum class MaxShift : u64 {
+ U32,
+ Undefined,
+ U64,
+ S64,
+};
+
+IR::U64 PackedShift(IR::IREmitter& ir, const IR::U64& packed_int, const IR::U32& safe_shift,
+ bool right_shift, bool is_signed) {
+ if (!right_shift) {
+ return ir.ShiftLeftLogical(packed_int, safe_shift);
+ }
+ if (is_signed) {
+ return ir.ShiftRightArithmetic(packed_int, safe_shift);
+ }
+ return ir.ShiftRightLogical(packed_int, safe_shift);
+}
+
+void SHF(TranslatorVisitor& v, u64 insn, const IR::U32& shift, const IR::U32& high_bits,
+ bool right_shift) {
+ union {
+ u64 insn;
+ BitField<0, 8, IR::Reg> dest_reg;
+ BitField<0, 8, IR::Reg> lo_bits_reg;
+ BitField<37, 2, MaxShift> max_shift;
+ BitField<48, 2, u64> x_mode;
+ BitField<50, 1, u64> wrap;
+ } const shf{insn};
+ if (shf.x_mode != 0) {
+ throw NotImplementedException("SHF X Mode");
+ }
+ if (shf.max_shift == MaxShift::Undefined) {
+ throw NotImplementedException("SHF Use of undefined MaxShift value");
+ }
+ const IR::U32 low_bits{v.X(shf.lo_bits_reg)};
+ const IR::U64 packed_int{v.ir.PackUint2x32(v.ir.CompositeConstruct(low_bits, high_bits))};
+ const IR::U32 max_shift{shf.max_shift == MaxShift::U32 ? v.ir.Imm32(32) : v.ir.Imm32(63)};
+ const IR::U32 safe_shift{shf.wrap != 0
+ ? v.ir.BitwiseAnd(shift, v.ir.ISub(max_shift, v.ir.Imm32(1)))
+ : v.ir.UMin(shift, max_shift)};
+
+ const bool is_signed{shf.max_shift == MaxShift::S64};
+ const IR::U64 shifted_value{PackedShift(v.ir, packed_int, safe_shift, right_shift, is_signed)};
+ const IR::Value unpacked_value{v.ir.UnpackUint2x32(shifted_value)};
+
+ const IR::U32 result{v.ir.CompositeExtract(unpacked_value, right_shift ? 0 : 1)};
+ v.X(shf.dest_reg, result);
+}
+} // Anonymous namespace
+
+void TranslatorVisitor::SHF_l_reg(u64 insn) {
+ SHF(*this, insn, GetReg20(insn), GetReg39(insn), false);
+}
+
+void TranslatorVisitor::SHF_l_imm(u64 insn) {
+ SHF(*this, insn, GetImm20(insn), GetReg39(insn), false);
+}
+
+void TranslatorVisitor::SHF_r_reg(u64 insn) {
+ SHF(*this, insn, GetReg20(insn), GetReg39(insn), true);
+}
+
+void TranslatorVisitor::SHF_r_imm(u64 insn) {
+ SHF(*this, insn, GetImm20(insn), GetReg39(insn), true);
+}
+
+} // namespace Shader::Maxwell
diff --git a/src/shader_recompiler/frontend/maxwell/translate/impl/not_implemented.cpp b/src/shader_recompiler/frontend/maxwell/translate/impl/not_implemented.cpp
index 62863aff6..2ab90d1bf 100644
--- a/src/shader_recompiler/frontend/maxwell/translate/impl/not_implemented.cpp
+++ b/src/shader_recompiler/frontend/maxwell/translate/impl/not_implemented.cpp
@@ -553,22 +553,6 @@ void TranslatorVisitor::SETLMEMBASE(u64) {
ThrowNotImplemented(Opcode::SETLMEMBASE);
}
-void TranslatorVisitor::SHF_l_reg(u64) {
- ThrowNotImplemented(Opcode::SHF_l_reg);
-}
-
-void TranslatorVisitor::SHF_l_imm(u64) {
- ThrowNotImplemented(Opcode::SHF_l_imm);
-}
-
-void TranslatorVisitor::SHF_r_reg(u64) {
- ThrowNotImplemented(Opcode::SHF_r_reg);
-}
-
-void TranslatorVisitor::SHF_r_imm(u64) {
- ThrowNotImplemented(Opcode::SHF_r_imm);
-}
-
void TranslatorVisitor::SHFL(u64) {
ThrowNotImplemented(Opcode::SHFL);
}