From e471b7857b2a2b739445776fa5b29fd9b12659fd Mon Sep 17 00:00:00 2001
From: Andre Weissflog <floooh@gmail.com>
Date: Thu, 22 Aug 2024 18:42:37 +0200
Subject: [PATCH] get rid of signed integer division

---
 emus/bombjack/bombjack.zig | 2 +-
 emus/kc85/kc85.zig         | 2 +-
 emus/namco/namco.zig       | 2 +-
 src/chips/ay3891.zig       | 2 +-
 src/common/audio.zig       | 2 +-
 src/systems/namco.zig      | 2 +-
 6 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/emus/bombjack/bombjack.zig b/emus/bombjack/bombjack.zig
index 7df780e..babc13e 100644
--- a/emus/bombjack/bombjack.zig
+++ b/emus/bombjack/bombjack.zig
@@ -12,7 +12,7 @@ export fn init() void {
     host.prof.init();
     sys.initInPlace(.{
         .audio = .{
-            .sample_rate = host.audio.sampleRate(),
+            .sample_rate = @intCast(host.audio.sampleRate()),
             .callback = host.audio.push,
         },
         .roms = .{
diff --git a/emus/kc85/kc85.zig b/emus/kc85/kc85.zig
index 223bb4d..cb49a85 100644
--- a/emus/kc85/kc85.zig
+++ b/emus/kc85/kc85.zig
@@ -38,7 +38,7 @@ export fn init() void {
     host.prof.init();
     sys.initInPlace(.{
         .audio = .{
-            .sample_rate = host.audio.sampleRate(),
+            .sample_rate = @intCast(host.audio.sampleRate()),
             .volume = 0.5,
             .callback = host.audio.push,
         },
diff --git a/emus/namco/namco.zig b/emus/namco/namco.zig
index b0e060c..fe32641 100644
--- a/emus/namco/namco.zig
+++ b/emus/namco/namco.zig
@@ -22,7 +22,7 @@ export fn init() void {
     host.prof.init();
     sys.initInPlace(.{
         .audio = .{
-            .sample_rate = host.audio.sampleRate(),
+            .sample_rate = @intCast(host.audio.sampleRate()),
             .callback = host.audio.push,
         },
         .roms = switch (model) {
diff --git a/src/chips/ay3891.zig b/src/chips/ay3891.zig
index f6e51c1..11689c4 100644
--- a/src/chips/ay3891.zig
+++ b/src/chips/ay3891.zig
@@ -217,7 +217,7 @@ pub fn Type(comptime cfg: TypeConfig) type {
         }
 
         pub fn init(opts: Options) Self {
-            const sample_period: i32 = @intCast(@divFloor(opts.tick_hz * FIXEDPOINT_SCALE, opts.sound_hz));
+            const sample_period: i32 = @intCast((opts.tick_hz * FIXEDPOINT_SCALE) / opts.sound_hz);
             var self = Self{
                 .cs_mask = @as(u8, opts.chip_select) << 4,
                 .noise = .{
diff --git a/src/common/audio.zig b/src/common/audio.zig
index e2ab027..0c3104d 100644
--- a/src/common/audio.zig
+++ b/src/common/audio.zig
@@ -32,7 +32,7 @@ pub fn Type(cfg: TypeConfig) type {
         /// runtime audio options
         pub const Options = struct {
             /// host audio frequency in Hz
-            sample_rate: i32,
+            sample_rate: u32,
             /// output volume modulator (0..1)
             volume: f32 = 0.75,
             /// called when new chunk of audio data is ready
diff --git a/src/systems/namco.zig b/src/systems/namco.zig
index 9a6cf2d..9691c1a 100644
--- a/src/systems/namco.zig
+++ b/src/systems/namco.zig
@@ -810,7 +810,7 @@ pub fn Type(comptime sys: System) type {
 
         fn initWSG(opts: Options) WSG {
             assert(opts.audio.sample_rate > 0);
-            const period: i32 = @divFloor(CPU_FREQUENCY * AUDIO.SAMPLE_SCALE, opts.audio.sample_rate);
+            const period: i32 = @intCast((CPU_FREQUENCY * AUDIO.SAMPLE_SCALE) / opts.audio.sample_rate);
             return .{
                 .tick_counter = AUDIO.PERIOD,
                 .sample_period = period,