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Merge pull request #3788 from wwylele/shader-jit-breakc

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shader/jit: implement breakc
This commit is contained in:
James Rowe 2018-06-09 18:36:46 -06:00 • committed by GitHub
commit 2dac1a9590
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2 changed files with 81 additions and 64 deletions
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13
src/video_core/shader/shader_jit_x64_compiler.cpp
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@ -68,7 +68,7 @@ const JitFunction instr_table[64] = {
nullptr, // unknown
&JitShader::Compile_NOP, // nop
&JitShader::Compile_END, // end
nullptr, // break
&JitShader::Compile_BREAKC, // breakc
&JitShader::Compile_CALL, // call
&JitShader::Compile_CALLC, // callc
&JitShader::Compile_CALLU, // callu
@ -584,6 +584,14 @@ void JitShader::Compile_END(Instruction instr) {
ret();
}
void JitShader::Compile_BREAKC(Instruction instr) {
Compile_Assert(looping, "BREAKC must be inside a LOOP");
if (looping) {
Compile_EvaluateCondition(instr);
jnz(*loop_break_label);
}
}
void JitShader::Compile_CALL(Instruction instr) {
// Push offset of the return
push(qword, (instr.flow_control.dest_offset + instr.flow_control.num_instructions));
@ -727,11 +735,14 @@ void JitShader::Compile_LOOP(Instruction instr) {
Label l_loop_start;
L(l_loop_start);
loop_break_label = Xbyak::Label();
Compile_Block(instr.flow_control.dest_offset + 1);
add(LOOPCOUNT_REG, LOOPINC); // Increment LOOPCOUNT_REG by Z-component
sub(LOOPCOUNT, 1); // Increment loop count by 1
jnz(l_loop_start); // Loop if not equal
L(*loop_break_label);
loop_break_label = boost::none;
looping = false;
}

6
src/video_core/shader/shader_jit_x64_compiler.h
View file

@ -8,6 +8,7 @@
#include <cstddef>
#include <utility>
#include <vector>
#include <boost/optional.hpp>
#include <nihstro/shader_bytecode.h>
#include <xbyak.h>
#include "common/bit_set.h"
@ -58,6 +59,7 @@ public:
void Compile_MOV(Instruction instr);
void Compile_NOP(Instruction instr);
void Compile_END(Instruction instr);
void Compile_BREAKC(Instruction instr);
void Compile_CALL(Instruction instr);
void Compile_CALLC(Instruction instr);
void Compile_CALLU(Instruction instr);
@ -119,6 +121,10 @@ private:
/// Mapping of Pica VS instructions to pointers in the emitted code
std::array<Xbyak::Label, MAX_PROGRAM_CODE_LENGTH> instruction_labels;
/// Label pointing to the end of the current LOOP block. Used by the BREAKC instruction to break
/// out of the loop.
boost::optional<Xbyak::Label> loop_break_label;
/// Offsets in code where a return needs to be inserted
std::vector<unsigned> return_offsets;