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Add more tests, fix division and modulus
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This commit is contained in:
shylie 2025-07-08 15:54:54 -04:00
parent 060ca1d3cd
commit f3773fc82b
8 changed files with 326 additions and 2 deletions
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6
emulator/src/foot-emulator.cpp
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@ -27,6 +27,7 @@ uint16_t& Device::memory(uint16_t index)
Emulator::Emulator() :
memory{},
registers{},
configuration(0),
mapped_base(0)
{}
@ -349,7 +350,8 @@ void Emulator::DIVI()
uint16_t b = decode_operand((instruction & 0x0000FF00) >> 8);
uint16_t& d = decode_operand((instruction & 0x00FF0000) >> 16);
d = uint32_t((int32_t(a) >> shift()) / int32_t(b));
// convert from unsigned to signed, then widen
d = uint32_t((int32_t(int16_t(a)) << shift()) / int32_t(int16_t(b)));
}
void Emulator::MODU()
@ -358,7 +360,7 @@ void Emulator::MODU()
uint16_t b = decode_operand((instruction & 0x0000FF00) >> 8);
uint16_t& d = decode_operand((instruction & 0x00FF0000) >> 16);
d = uint32_t((int32_t(a) >> shift()) / int32_t(b));
d = int16_t(a) % int16_t(b);
}
bool Emulator::repeats()

6
emulator/tests/CMakeLists.txt
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@ -17,3 +17,9 @@ test(band-instruction)
test(bxor-instruction)
test(srsh-instruction)
test(zlsh-instruction)
test(clsh-instruction)
test(addi-instruction)
test(subt-instruction)
test(mult-instruction)
test(divi-instruction)
test(modu-instruction)

36
emulator/tests/addi-instruction.cpp Normal file
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@ -0,0 +1,36 @@
#include "test-common.h"
int main(int argc, char** argv)
{
// CNST
// dst - 0, Direct
// imm - 0x4567
//
// ADDI
// dst - 0, Direct
// a - 0, Direct
// b - 2, Immediate
{
foot::Emulator emu = run_instructions({ 0x00204567, 0x09200220 });
if (!check(0x4569, emu.register_at(0))) { return 1; }
}
// CNST
// dst - 0, Direct
// imm - 0x4567
//
// CNST
// dst - 1, Direct
// imm = 0xFFFE (-2)
//
// ADDI
// dst - 0, Direct
// a - 0, Direct
// b - 1, Direct
{
foot::Emulator emu = run_instructions({ 0x00204567, 0x0021FFFE, 0x09202120 });
if (!check(0x4565, emu.register_at(0))) { return 1; }
}
return 0;
}

19
emulator/tests/clsh-instruction.cpp Normal file
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@ -0,0 +1,19 @@
#include "test-common.h"
int main(int argc, char** argv)
{
// CNST
// dst - 0, Direct
// imm - 0x4567
//
// CLSH
// dst - 0, Direct
// a - 0, Direct
// b - 2, Immediate
{
foot::Emulator emu = run_instructions({ 0x00204567, 0x08200220 });
if (!check(0x159D, emu.register_at(0))) { return 1; }
}
return 0;
}

75
emulator/tests/divi-instruction.cpp Normal file
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@ -0,0 +1,75 @@
#include "test-common.h"
int main(int argc, char** argv)
{
// CNST
// dst - 0, Direct
// imm - 0x0005
//
// DIVI
// dst - 0, Direct
// a - 0, Direct
// b - 2, Immediate
{
foot::Emulator emu = run_instructions({ 0x00200005, 0x0E200220 });
if (!check(0x0002, emu.register_at(0))) { return 1; }
}
// CNST
// dst - 0, Direct
// imm - 0x0007
//
// CNST
// dst - 1, Direct
// imm = 0xFFF9 (-7)
//
// DIVI
// dst - 0, Direct
// a - 0, Direct
// b - 1, Direct
{
foot::Emulator emu = run_instructions({ 0x00200007, 0x0021FFF9, 0x0E202120 });
if (!check(0xFFFF, emu.register_at(0))) { return 1; }
}
// CNST
// dst - 0, Direct
// imm - 0xFFF9 (-7)
//
// CNST
// dst - 1, Direct
// imm = 0xFFF9 (-7)
//
// DIVI
// dst - 0, Direct
// a - 0, Direct
// b - 1, Direct
{
foot::Emulator emu = run_instructions({ 0x0020FFF9, 0x0021FFF9, 0x0E202120 });
if (!check(0x1, emu.register_at(0))) { return 1; }
}
// CNST
// dst - 0, Direct
// imm - 0x0002 (1)
//
// CNST
// dst - 1, Direct
// imm = 0x0001 (0.5)
//
// CONF
// dst - X, Immediate
// a - 1, Immediate
//
// MULT
// dst - 0, Direct
// a - 0, Direct
// b - 1, Direct
{
foot::Emulator emu = run_instructions({ 0x00200002, 0x00210001, 0x01000401, 0x0E202120 });
// 0x4 (2)
if (!check(0x4, emu.register_at(0))) { return 1; }
}
return 0;
}

75
emulator/tests/modu-instruction.cpp Normal file
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@ -0,0 +1,75 @@
#include "test-common.h"
int main(int argc, char** argv)
{
// CNST
// dst - 0, Direct
// imm - 0x0005
//
// DIVI
// dst - 0, Direct
// a - 0, Direct
// b - 2, Immediate
{
foot::Emulator emu = run_instructions({ 0x00200005, 0x0F200220 });
if (!check(0x1, emu.register_at(0))) { return 1; }
}
// CNST
// dst - 0, Direct
// imm - 0x0005
//
// CNST
// dst - 1, Direct
// imm = 0xFFFE (-2)
//
// DIVI
// dst - 0, Direct
// a - 0, Direct
// b - 1, Direct
{
foot::Emulator emu = run_instructions({ 0x00200005, 0x0021FFFE, 0x0F202120 });
if (!check(0x1, emu.register_at(0))) { return 1; }
}
// CNST
// dst - 0, Direct
// imm - 0xFFFE (-2)
//
// CNST
// dst - 1, Direct
// imm = 0x0005
//
// DIVI
// dst - 0, Direct
// a - 0, Direct
// b - 1, Direct
{
foot::Emulator emu = run_instructions({ 0x0020FFFE, 0x00210005, 0x0F202120 });
if (!check(0xFFFE, emu.register_at(0))) { return 1; }
}
// CNST
// dst - 0, Direct
// imm - 0x0005 (2.5)
//
// CNST
// dst - 1, Direct
// imm = 0x0003 (1.5)
//
// CONF
// dst - X, Immediate
// a - 1, Immediate
//
// MULT
// dst - 0, Direct
// a - 0, Direct
// b - 1, Direct
{
foot::Emulator emu = run_instructions({ 0x00200005, 0x00210003, 0x01000401, 0x0F202120 });
if (!check(0x2, emu.register_at(0))) { return 1; }
}
return 0;
}

75
emulator/tests/mult-instruction.cpp Normal file
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@ -0,0 +1,75 @@
#include "test-common.h"
int main(int argc, char** argv)
{
// CNST
// dst - 0, Direct
// imm - 0x0003
//
// MULT
// dst - 0, Direct
// a - 0, Direct
// b - 2, Immediate
{
foot::Emulator emu = run_instructions({ 0x00200003, 0x0B200220 });
if (!check(0x0006, emu.register_at(0))) { return 1; }
}
// CNST
// dst - 0, Direct
// imm - 0x0007
//
// CNST
// dst - 1, Direct
// imm = 0xFFF9 (-7)
//
// MULT
// dst - 0, Direct
// a - 0, Direct
// b - 1, Direct
{
foot::Emulator emu = run_instructions({ 0x00200007, 0x0021FFF9, 0x0B202120 });
if (!check(0xFFCF, emu.register_at(0))) { return 1; }
}
// CNST
// dst - 0, Direct
// imm - 0xFFF9 (-7)
//
// CNST
// dst - 1, Direct
// imm = 0xFFF9 (-7)
//
// MULT
// dst - 0, Direct
// a - 0, Direct
// b - 1, Direct
{
foot::Emulator emu = run_instructions({ 0x0020FFF9, 0x0021FFF9, 0x0B202120 });
if (!check(0x31, emu.register_at(0))) { return 1; }
}
// CNST
// dst - 0, Direct
// imm - 0x0007 (3.5)
//
// CNST
// dst - 1, Direct
// imm = 0x0007 (3.5)
//
// CONF
// dst - X, Immediate
// a - 1, Immediate
//
// MULT
// dst - 0, Direct
// a - 0, Direct
// b - 1, Direct
{
foot::Emulator emu = run_instructions({ 0x00200007, 0x00210007, 0x01000401, 0x0B202120 });
// 0x18 (12)
if (!check(0x18, emu.register_at(0))) { return 1; }
}
return 0;
}

36
emulator/tests/subt-instruction.cpp Normal file
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@ -0,0 +1,36 @@
#include "test-common.h"
int main(int argc, char** argv)
{
// CNST
// dst - 0, Direct
// imm - 0x4567
//
// SUBT
// dst - 0, Direct
// a - 0, Direct
// b - 2, Immediate
{
foot::Emulator emu = run_instructions({ 0x00204567, 0x0A200220 });
if (!check(0x4565, emu.register_at(0))) { return 1; }
}
// CNST
// dst - 0, Direct
// imm - 0x4567
//
// CNST
// dst - 1, Direct
// imm = 0xFFFE (-2)
//
// SUBT
// dst - 0, Direct
// a - 0, Direct
// b - 1, Direct
{
foot::Emulator emu = run_instructions({ 0x00204567, 0x0021FFFE, 0x0A202120 });
if (!check(0x4569, emu.register_at(0))) { return 1; }
}
return 0;
}