Improve auto-generation of format conversion routines.

mini_al.h

@@ -10273,9 +10273,6 @@ void mal_blend_f32(float* pOut, float* pInA, float* pInB, float factor, mal_uint
 //
 //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-#if 0
-#include "tools/malgen/bin/malgen_test0.c"
-#else
 void mal_pcm_u8_to_s16(short* pOut, const unsigned char* pIn, unsigned int count)
 {
     int r;
@@ -10442,19 +10439,10 @@ void mal_pcm_s32_to_f32(float* pOut, const int* pIn, unsigned int count)
     float r;
     for (unsigned int i = 0; i < count; ++i) {
         int x = pIn[i];
-
-#if 1
         double t;
         t = (double)(x + 2147483648);
         t = t * 0.0000000004656612873077392578125;
         r = (float)(t - 1);
-#else
-        int s;
-        s = ((*((int*)&x)) & 0x80000000) >> 31;
-        s = s + 2147483647;
-        r = x / (float)(unsigned int)s;
-#endif
-
         pOut[i] = (float)r;
     }
 }
@@ -10466,18 +10454,8 @@ void mal_pcm_f32_to_u8(unsigned char* pOut, const float* pIn, unsigned int count
         float x = pIn[i];
         float c;
         c = ((x < -1) ? -1 : ((x > 1) ? 1 : x));
-
-#if 1
         c = c + 1;
         r = (int)(c * 127.5f);
-#else
-        int s;
-        s = ((*((int*)&x)) & 0x80000000) >> 31;
-        s = s + 127;
-        r = (int)(c * s);
-        r = r + 128;
-#endif
-
         pOut[i] = (unsigned char)r;
     }
 }
@@ -10489,18 +10467,9 @@ void mal_pcm_f32_to_s16(short* pOut, const float* pIn, unsigned int count)
         float x = pIn[i];
         float c;
         c = ((x < -1) ? -1 : ((x > 1) ? 1 : x));
-
-#if 1
         c = c + 1;
         r = (int)(c * 32767.5f);
         r = r - 32768;
-#else
-        int s;
-        s = ((*((int*)&x)) & 0x80000000) >> 31;
-        s = s + 32767;
-        r = (int)(c * s);
-#endif
-
         pOut[i] = (short)r;
     }
 }
@@ -10512,18 +10481,9 @@ void mal_pcm_f32_to_s24(void* pOut, const float* pIn, unsigned int count)
         float x = pIn[i];
         float c;
         c = ((x < -1) ? -1 : ((x > 1) ? 1 : x));
-
-#if 1
         c = c + 1;
         r = (int)(c * 8388607.5f);
         r = r - 8388608;
-#else
-        int s;
-        s = ((*((int*)&x)) & 0x80000000) >> 31;
-        s = s + 8388607;
-        r = (int)(c * s);
-#endif
-
         ((unsigned char*)pOut)[(i*3)+0] = (unsigned char)(r & 0xFF); ((unsigned char*)pOut)[(i*3)+1] = (unsigned char)((r & 0xFF00) >> 8); ((unsigned char*)pOut)[(i*3)+2] = (unsigned char)((r & 0xFF0000) >> 16);
     }
 }
@@ -10534,24 +10494,14 @@ void mal_pcm_f32_to_s32(int* pOut, const float* pIn, unsigned int count)
     for (unsigned int i = 0; i < count; ++i) {
         float x = pIn[i];
         float c;
-        c = ((x < -1) ? -1 : ((x > 1) ? 1 : x));
-
-#if 1
         mal_int64 t;
+        c = ((x < -1) ? -1 : ((x > 1) ? 1 : x));
         c = c + 1;
         t = (mal_int64)(c * 2147483647.5);
         r = (int)(t - 2147483648);
-#else
-        mal_int64 s;
-        s = ((*((int*)&x)) & 0x80000000) >> 31;
-        s = s + 2147483647;
-        r = (int)(c * s);
-#endif
-
         pOut[i] = (int)r;
     }
 }
-#endif
 
 #endif
 

resources/format_conversions.txt

@@ -116,53 +116,48 @@ s32->s24 {
     shr r x 8;
 }
 
-# r = x / (2147483647 + sign(x))
+# r = ((x + 2147483648) * 0.0000000004656612873077392578125) - 1
 s32->f32 {
-    int s;
+    dbl t;
-    sig s x;
+    add (dbl)t x 2147483648;
-    add s s 2147483647;
+    mul t t 0.0000000004656612873077392578125;
-    div r x (flt)(uint)s;
+    sub (flt)r t 1;
 }
 
 
 
-# r = (clip(x) * (0x7F + sign(x))) + 128
+# r = (clip(x) + 1) * 127.5
 f32->u8 {
     flt c;
-    int s;
     clip c x;
-    sig s x;
+    add c c 1;
-    add s s 127;
+    mul (int)r c 127.5f;
-    mul (int)r c s;
-    add r r 128;
 }
 
-# r = clip(x) * (0x7FFF + sign(x))
+# r = (clip(x) + 1) * 32767.5 - 32768
 f32->s16 {
     flt c;
-    int s;
     clip c x;
-    sig s x;
+    add c c 1;
-    add s s 32767;
+    mul (int)r c 32767.5f;
-    mul (int)r c s;
+    sub r r 32768;
 }
 
-# r = clip(x) * (0x7FFFFF + sign(x))
+# r = (clip(x) + 1) * 8388607.5 - 8388608
 f32->s24 {
     flt c;
-    int s;
     clip c x;
-    sig s x;
+    add c c 1;
-    add s s 8388607;
+    mul (int)r c 8388607.5f;
-    mul (int)r c s;
+    sub r r 8388608;
 }
 
-# r = clip(x) * (0x7FFFFFFF + sign(x))
+# r = (clip(x) + 1) * 2147483647.5 - 2147483648
 f32->s32 {
     flt c;
-    lng s;
+    lng t;
     clip c x;
-    sig s x;
+    add c c 1;
-    add s s 2147483647;
+    mul (lng)t c 2147483647.5;
-    mul (int)r c s;
+    sub (int)r t 2147483648;
 }

tools/malgen/source/malgen.cpp

@@ -413,6 +413,15 @@ std::string malgen_format_op_param(const char* param)
         }
     }
 
+    // (lng) -> (mal_int64)
+    {
+        const char* src = "(lng)"; const char* dst = "(mal_int64)";
+        size_t loc = s.find(src);
+        if (loc != std::string::npos) {
+            s = s.replace(loc, strlen(src), dst);
+        }
+    }
+
     return s;
 }
 
@@ -456,11 +465,14 @@ std::string malgen_generate_code__conversion_func_inst(malgen_context* pContext,
         code += "int "; code += pInst->params[0];
     }
     if (strcmp(pInst->name, "lng") == 0) {
-        code += "long long "; code += pInst->params[0];
+        code += "mal_int64 "; code += pInst->params[0];
     }
     if (strcmp(pInst->name, "flt") == 0) {
         code += "float "; code += pInst->params[0];
     }
+    if (strcmp(pInst->name, "dbl") == 0) {
+        code += "double "; code += pInst->params[0];
+    }
 
     if (strcmp(pInst->name, "add") == 0) {
         code += malgen_generate_code__conversion_func_inst_binary_op(pInst->params[0], pInst->params[1], pInst->params[2], "+");
@@ -487,7 +499,7 @@ std::string malgen_generate_code__conversion_func_inst(malgen_context* pContext,
     }
 
     if (strcmp(pInst->name, "sig") == 0) {  // <-- This gets the sign of the first input parameter and moves it to the result.
-        code += pInst->params[0]; code += " = "; code += "((*((int*)&"; code += pInst->params[1]; code += ")) & 0x80000000) >> 31";
+        code += pInst->params[0]; code += " = "; code += "(("; code += pInst->params[1]; code += " < 0) ? 1 : 0)"; // ((a < 0) ? 1 : 0)
     }
 
     if (strcmp(pInst->name, "clip") == 0) {  // clamp(a, -1, 1) -> r = ((a < -1) ? -1 : ((a > 1) ? 1 : a))