105 lines
2.2 KiB
C++
105 lines
2.2 KiB
C++
#include <catch/catch.hpp>
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#include <array>
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#include <biscuit/assembler.hpp>
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#include "assembler_test_utils.hpp"
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using namespace biscuit;
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TEST_CASE("Branch to Self", "[branch]") {
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uint32_t data;
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auto as = MakeAssembler32(data);
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// Simple branch to self with a jump instruction.
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{
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Label label;
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as.Bind(&label);
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as.J(&label);
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REQUIRE(data == 0x0000006F);
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}
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as.RewindBuffer();
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// Simple branch to self with a compressed jump instruction.
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{
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Label label;
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as.Bind(&label);
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as.C_J(&label);
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REQUIRE((data & 0xFFFF) == 0xA001);
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}
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as.RewindBuffer();
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// Simple branch to self with a conditional branch instruction.
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{
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Label label;
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as.Bind(&label);
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as.BNE(x3, x4, &label);
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REQUIRE(data == 0x00419063);
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}
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as.RewindBuffer();
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// Simple branch to self with a compressed branch instruction.
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{
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Label label;
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as.Bind(&label);
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as.C_BNEZ(x15, &label);
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REQUIRE((data & 0xFFFF) == 0xE381);
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}
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}
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TEST_CASE("Branch with Instructions Between", "[branch]") {
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std::array<uint32_t, 20> data{};
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auto as = MakeAssembler32(data);
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// Simple branch backward
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{
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Label label;
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as.Bind(&label);
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as.ADD(x1, x2, x3);
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as.SUB(x2, x4, x3);
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as.J(&label);
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REQUIRE(data[2] == 0xFF9FF06F);
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}
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as.RewindBuffer();
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data.fill(0);
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// Simple branch forward
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{
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Label label;
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as.J(&label);
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as.ADD(x1, x2, x3);
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as.SUB(x2, x4, x3);
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as.Bind(&label);
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REQUIRE(data[0] == 0x00C0006F);
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}
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as.RewindBuffer();
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data.fill(0);
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// Simple branch backward (compressed)
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{
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Label label;
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as.Bind(&label);
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as.ADD(x1, x2, x3);
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as.SUB(x2, x4, x3);
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as.C_J(&label);
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REQUIRE((data[2] & 0xFFFF) == 0xBFC5);
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}
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as.RewindBuffer();
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data.fill(0);
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// Simple branch forward (compressed)
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{
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Label label;
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as.C_J(&label);
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as.ADD(x1, x2, x3);
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as.SUB(x2, x4, x3);
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as.Bind(&label);
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REQUIRE((data[0] & 0xFFFF) == 0xA0A1);
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}
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}
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