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simX floating-point fixes and refactoring

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This commit is contained in:
Blaise Tine
2021-03-08 03:44:08 -08:00
parent e4cdefc3b0
commit 8eac091fb5
21 changed files with 2425 additions and 2348 deletions
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17
simX/mem.cpp
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@@ -90,11 +90,14 @@ void MemoryUnit::ADecoder::write(Addr a, Word w, bool /*sup*/, Size wordSize) {
throw BadAddress();
}
RAM *ram = (RAM *)ma.md;
if (wordSize == 8) {
switch (wordSize) {
case 1:
ram->writeByte(ma.addr, &w);
} else if (wordSize == 16) {
break;
case 2:
ram->writeHalf(ma.addr, &w);
} else {
break;
default:
ram->writeWord(ma.addr, &w);
}
}
@@ -247,7 +250,6 @@ void DiskControllerMemDevice::write(Addr a, Word w) {
RAM::RAM(uint32_t num_pages, uint32_t page_size)
: page_bits_(log2ceil(page_size)) {
assert(page_size >= 4);
assert(ispow2(page_size));
mem_.resize(num_pages, NULL);
uint64_t sizel = uint64_t(mem_.size()) << page_bits_;
@@ -272,15 +274,16 @@ Size RAM::size() const {
}
uint8_t *RAM::get(uint32_t address) {
uint32_t page_size = 14 << page_bits_;
uint32_t page_size = 1 << page_bits_;
uint32_t page_index = address >> page_bits_;
uint32_t byte_offset = address & ((1 << page_bits_) - 1);
uint8_t* &page = mem_.at(page_index);
if (page == NULL) {
uint8_t *ptr = new uint8_t[page_size];
for (uint32_t i = 0; i < (page_size / 4); ++i) {
((uint32_t*)ptr)[i] = 0xddccbbaa;
// set uninitialized data to "baadf00d"
for (uint32_t i = 0; i < page_size; ++i) {
ptr[i] = (0xbaadf00d >> ((i & 0x3) * 8)) & 0xff;
}
page = ptr;
}