shithub: cstory

--- /dev/null

+++ b/src/Attributes.h

@@ -1,0 +1,19 @@

+#pragma once

+#ifdef __GNUC__

+#define ATTRIBUTE_HOT __attribute__((hot))

+#define ATTRIBUTE_OPTIMIZE(optString) __attribute__((optimize(optString)))

+#define LIKELY(condition) __builtin_expect((condition), 1)

+#define UNLIKELY(condition) __builtin_expect((condition), 0)

+#define PREFETCH(address, isWrite, locality) __builtin_prefetch((address), (isWrite), (locality))

+#else

+#define ATTRIBUTE_HOT

+#define ATTRIBUTE_OPTIMIZE(optString)

+#define LIKELY(condition) condition

+#define UNLIKELY(condition) condition

+#define PREFETCH(address, isWrite, locality)

+#endif

--- a/src/Backends/Audio/SDL2.cpp

+++ b/src/Backends/Audio/SDL2.cpp

@@ -8,6 +8,7 @@

 #include "../Misc.h"

 #include "../../Organya.h"

 #include "../../WindowsWrapper.h"

+#include "../../Attributes.h"

 #include "SoftwareMixer.h"

--- a/src/Backends/Audio/SoftwareMixer.cpp

+++ b/src/Backends/Audio/SoftwareMixer.cpp

@@ -1,21 +1,16 @@

 #include "SoftwareMixer.h"

-#include <math.h>

+#include <cmath>

 #include <stddef.h>

 #include <stdio.h>

 #include <stdlib.h>

 #include <string.h>

+#include "../../Attributes.h"

 #define MIN(a, b) ((a) < (b) ? (a) : (b))

 #define MAX(a, b) ((a) > (b) ? (a) : (b))

 #define CLAMP(x, y, z) MIN(MAX((x), (y)), (z))

-#ifdef __GNUC__

-#define ATTR_HOT __attribute__((hot))

-#else

-#define ATTR_HOT

-#endif

 struct Mixer_Sound

 	unsigned char *samples;

@@ -144,7 +139,7 @@

 // Most CPU-intensive function in the game (2/3rd CPU time consumption in my experience), so marked with attrHot so the compiler considers it a hot spot (as it is) when optimizing

-ATTR_HOT void Mixer_MixSounds(float *stream, unsigned int frames_total)

+ATTRIBUTE_HOT void Mixer_MixSounds(float *stream, unsigned int frames_total)

 	for (Mixer_Sound *sound = sound_list_head; sound != NULL; sound = sound->next)

@@ -159,7 +154,7 @@

 				const float sample2 = (sound->samples[(size_t)sound->position + 1] - 128.0f) / 128.0f;

 				// Perform linear interpolation

-				const float interpolated_sample = sample1 + ((sample2 - sample1) * fmod(sound->position, 1.0));

+				const float interpolated_sample = sample1 + (sample2 - sample1) * (sound->position - std::trunc(sound->position));

 				*steam_pointer++ += interpolated_sample * sound->volume_l;

 				*steam_pointer++ += interpolated_sample * sound->volume_r;

@@ -170,7 +165,7 @@

 					if (sound->looping)

-						sound->position = fmod(sound->position, (double)sound->frames);

+						sound->position = std::fmod(sound->position, (double)sound->frames);

 					else

--- a/src/Backends/Rendering/Software.cpp

+++ b/src/Backends/Rendering/Software.cpp

@@ -7,6 +7,7 @@

 #include "SDL.h"

 #include "../../WindowsWrapper.h"

+#include "../../Attributes.h"

 #include "../Misc.h"

 #include "../SDL2/Window.h"

@@ -151,7 +152,7 @@

 	(void)height;

-void RenderBackend_Blit(RenderBackend_Surface *source_surface, const RECT *rect, RenderBackend_Surface *destination_surface, long x, long y, BOOL colour_key)

+ATTRIBUTE_HOT void RenderBackend_Blit(RenderBackend_Surface *source_surface, const RECT *rect, RenderBackend_Surface *destination_surface, long x, long y, BOOL colour_key)

 	if (source_surface == NULL || destination_surface == NULL)

 		return;

@@ -208,7 +209,7 @@

 			for (long i = 0; i < rect_clamped.right - rect_clamped.left; ++i)

-				if (source_pointer[0] == 0 && source_pointer[1] == 0 && source_pointer[2] == 0)	// Assumes the colour key will always be #000000 (black)

+				if (UNLIKELY(source_pointer[0] == 0 && source_pointer[1] == 0 && source_pointer[2] == 0))	// Assumes the colour key will always be #000000 (black)

 					source_pointer += 3;

 					destination_pointer += 3;

@@ -234,7 +235,7 @@

-void RenderBackend_ColourFill(RenderBackend_Surface *surface, const RECT *rect, unsigned char red, unsigned char green, unsigned char blue)

+ATTRIBUTE_HOT void RenderBackend_ColourFill(RenderBackend_Surface *surface, const RECT *rect, unsigned char red, unsigned char green, unsigned char blue)

 	if (surface == NULL)

 		return;

--- a/src/PixTone.cpp

+++ b/src/PixTone.cpp

@@ -4,6 +4,7 @@

 #include <stdlib.h>

 #include <string.h>

+#include "Attributes.h"

 #include "WindowsWrapper.h"

 #include "Random.h"

@@ -65,7 +66,7 @@

 //BOOL wave_tables_made;

-BOOL MakePixelWaveData(const PIXTONEPARAMETER *ptp, unsigned char *pData)

+ATTRIBUTE_HOT BOOL MakePixelWaveData(const PIXTONEPARAMETER *ptp, unsigned char *pData)

 	int i;

 	int a, b, c, d;

--

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