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Switch to overt use of std::fill.

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This commit is contained in:
Thomas Harte 2022-09-13 15:35:19 -04:00
parent cb7f1e42ff
commit ffdf44ad4f
1 changed files with 33 additions and 15 deletions
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48
Machines/Apple/AppleIIgs/MemoryMap.hpp
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@ -9,6 +9,7 @@
#ifndef Machines_Apple_AppleIIgs_MemoryMap_hpp
#define Machines_Apple_AppleIIgs_MemoryMap_hpp
#include <algorithm>
#include <array>
#include <bitset>
#include <vector>
@ -457,7 +458,6 @@ class MemoryMap {
// [plus IO and language card space, subject to your definition of shadowing]
static constexpr int shadow_shift = 10;
static constexpr int auxiliary_offset = 0x1'0000 >> shadow_shift;
enum Inhibit {
TextPage1 = 0x01,
@ -468,15 +468,21 @@ class MemoryMap {
TextPage2 = 0x20,
};
#define Fill(a, b, x) std::fill(&shadow_pages[a >> shadow_shift], &shadow_pages[b >> shadow_shift], x);
// Text Page 1, main and auxiliary — $0400–$0800.
for(size_t c = 0x0400 >> shadow_shift; c < 0x0800 >> shadow_shift; c++) {
shadow_pages[c] = shadow_pages[c+auxiliary_offset] = !(shadow_register_ & Inhibit::TextPage1);
{
const bool shadow_text1 = !(shadow_register_ & Inhibit::TextPage1);
Fill(0x0'0400, 0x0'0800, shadow_text1);
Fill(0x1'0400, 0x1'0800, shadow_text1);
}
// Text Page 2, main and auxiliary — 0x0800–0x0c00.
// TODO: on a ROM03 machine only.
for(size_t c = 0x0800 >> shadow_shift; c < 0x0c00 >> shadow_shift; c++) {
shadow_pages[c] = shadow_pages[c+auxiliary_offset] = !(shadow_register_ & Inhibit::TextPage2);
{
const bool shadow_text2 = !(shadow_register_ & Inhibit::TextPage2);
Fill(0x0'0800, 0x0'0c00, shadow_text2);
Fill(0x1'0800, 0x1'0c00, shadow_text2);
}
// Hi-res graphics Page 1, main and auxiliary — $2000–$4000;
@ -486,36 +492,48 @@ class MemoryMap {
// high-res graphics page 1 inhibit bit alone is definitive.
//
// Odd test:
// (high-res graphics inhibit or auxiliary high res graphics inhibit) _and_ (super high-res inhibit).
// (high-res graphics inhibit or auxiliary high res graphics inhibit) _and_
// (super high-res inhibit).
//
for(size_t c = 0x2000 >> shadow_shift; c < 0x4000 >> shadow_shift; c++) {
shadow_pages[c] = !(shadow_register_ & Inhibit::HighRes1);
shadow_pages[c+auxiliary_offset] = !(
{
const bool shadow_highres1 = !(shadow_register_ & Inhibit::HighRes1);
Fill(0x0'2000, 0x0'4000, shadow_highres1);
const bool shadow_aux_highres1 = !(
shadow_register_ & (Inhibit::HighRes1 | Inhibit::AuxiliaryHighRes) &&
shadow_register_ & Inhibit::SuperHighRes
);
Fill(0x1'2000, 0x1'4000, shadow_aux_highres1);
}
// Hi-res graphics Page 2, main and auxiliary — $4000–$6000;
// also part of the super high-res graphics page.
//
// Test applied: much like that for page 1.
for(size_t c = 0x4000 >> shadow_shift; c < 0x6000 >> shadow_shift; c++) {
shadow_pages[c] = !(shadow_register_ & Inhibit::HighRes2);
shadow_pages[c+auxiliary_offset] = !(
{
const bool shadow_highres2 = !(shadow_register_ & Inhibit::HighRes2);
Fill(0x0'4000, 0x0'6000, shadow_highres2);
const bool shadow_aux_highres2 = !(
shadow_register_ & (Inhibit::HighRes2 | Inhibit::AuxiliaryHighRes) &&
shadow_register_ & Inhibit::SuperHighRes
);
Fill(0x1'4000, 0x1'6000, shadow_aux_highres2);
}
// Residue of Super Hi-Res — $6000–$a000 (odd pages only).
//
// Test applied:
// auxiliary high res graphics inhibit and super high-res inhibit
for(size_t c = 0x6000 >> shadow_shift; c < 0xa000 >> shadow_shift; c++) {
shadow_pages[c+auxiliary_offset] =
!(shadow_register_ & Inhibit::SuperHighRes && shadow_register_ & Inhibit::AuxiliaryHighRes);
{
const bool shadow_superhighres = !(
shadow_register_ & Inhibit::SuperHighRes &&
shadow_register_ & Inhibit::AuxiliaryHighRes
);
Fill(0x1'6000, 0x1'a000, shadow_superhighres);
}
#undef Fill
}
void print_state() {