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fuzz_with_unicorn: Extract RandomFpcr function

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Deduplicate randomization of fpcr and make use of FP::FPCR
This commit is contained in:
MerryMage 2018-07-31 12:35:04 +01:00
parent 5e88d66470
commit 2b538b471f
1 changed files with 11 additions and 3 deletions
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14
tests/A64/fuzz_with_unicorn.cpp
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@ -11,6 +11,7 @@
#include <catch.hpp> #include <catch.hpp>
#include "common/fp/fpcr.h"
#include "common/fp/fpsr.h" #include "common/fp/fpsr.h"
#include "common/llvm_disassemble.h" #include "common/llvm_disassemble.h"
#include "common/scope_exit.h" #include "common/scope_exit.h"
@ -38,6 +39,13 @@ static Vector RandomVector() {
return {RandInt<u64>(0, ~u64(0)), RandInt<u64>(0, ~u64(0))}; return {RandInt<u64>(0, ~u64(0)), RandInt<u64>(0, ~u64(0))};
} }
static u32 RandomFpcr() {
FP::FPCR fpcr;
fpcr.DN(RandInt(0, 1) == 0);
fpcr.RMode(static_cast<FP::RoundingMode>(RandInt(0, 3)));
return fpcr.Value();
}
static bool ShouldTestInst(u32 instruction, u64 pc, bool is_last_inst) { static bool ShouldTestInst(u32 instruction, u64 pc, bool is_last_inst) {
const A64::LocationDescriptor location{pc, {}}; const A64::LocationDescriptor location{pc, {}};
IR::Block block{location}; IR::Block block{location};
@ -274,7 +282,7 @@ TEST_CASE("A64: Single random instruction", "[a64]") {
std::generate(vecs.begin(), vecs.end(), RandomVector); std::generate(vecs.begin(), vecs.end(), RandomVector);
instructions[0] = GenRandomInst(0, true); instructions[0] = GenRandomInst(0, true);
u32 pstate = RandInt<u32>(0, 0xF) << 28; u32 pstate = RandInt<u32>(0, 0xF) << 28;
u32 fpcr = (RandInt<u32>(0, 0x3) << 22) | (RandInt<u32>(0, 1) << 25); // randomize RMode and DN u32 fpcr = RandomFpcr();
INFO("Instruction: 0x" << std::hex << instructions[0]); INFO("Instruction: 0x" << std::hex << instructions[0]);
@ -387,7 +395,7 @@ TEST_CASE("A64: Floating point instructions", "[a64]") {
std::generate(vecs.begin(), vecs.end(), gen_vector); std::generate(vecs.begin(), vecs.end(), gen_vector);
instructions[0] = GenFloatInst(0, true); instructions[0] = GenFloatInst(0, true);
u32 pstate = RandInt<u32>(0, 0xF) << 28; u32 pstate = RandInt<u32>(0, 0xF) << 28;
u32 fpcr = (RandInt<u32>(0, 0x3) << 22) | (RandInt<u32>(0, 1) << 25); // randomize RMode and DN u32 fpcr = RandomFpcr();
INFO("Instruction: 0x" << std::hex << instructions[0]); INFO("Instruction: 0x" << std::hex << instructions[0]);
@ -411,7 +419,7 @@ TEST_CASE("A64: Small random block", "[a64]") {
instructions[4] = GenRandomInst(16, true); instructions[4] = GenRandomInst(16, true);
u32 pstate = RandInt<u32>(0, 0xF) << 28; u32 pstate = RandInt<u32>(0, 0xF) << 28;
u32 fpcr = (RandInt<u32>(0, 0x3) << 22) | (RandInt<u32>(0, 1) << 25); // randomize RMode and DN u32 fpcr = RandomFpcr();
INFO("Instruction 1: 0x" << std::hex << instructions[0]); INFO("Instruction 1: 0x" << std::hex << instructions[0]);
INFO("Instruction 2: 0x" << std::hex << instructions[1]); INFO("Instruction 2: 0x" << std::hex << instructions[1]);