--- /dev/null
+From a8be33cd50b5f477f047e845426047da332d6273 Mon Sep 17 00:00:00 2001
+From: Stefan Strogin <steils@gentoo.org>
+Date: Fri, 14 Feb 2020 03:55:13 +0200
+Subject: [PATCH] Fix fixed point math functions (from media-libs/allegro)
+
+Bug: https://bugs.gentoo.org/697090
+Upstream-Status: Inappropriate [no upstream]
+Signed-off-by: Stefan Strogin <steils@gentoo.org>
+---
+ hgrcos.c | 2 +-
+ rec.c | 58 ++++++++++++++++++++++++++++----------------------------
+ 2 files changed, 30 insertions(+), 30 deletions(-)
+
+diff --git a/hgrcos.c b/hgrcos.c
+index c65b469..442b18f 100644
+--- a/hgrcos.c
++++ b/hgrcos.c
+@@ -34,5 +34,5 @@ fixed hgrsin(fixed theta)
+ \r
+ fixed hgrtan(fixed theta)\r
+ {\r
+- return fdiv(hgrcos(theta + 0xc00000), hgrcos(theta));\r
++ return fixdiv(hgrcos(theta + 0xc00000), hgrcos(theta));\r
+ }\r
+diff --git a/rec.c b/rec.c
+index bf6df2e..d02830a 100644
+--- a/rec.c
++++ b/rec.c
+@@ -214,7 +214,7 @@ void SetupLight1(void)
+ {\r
+ if(line[x] == c1)\r
+ {\r
+- fixed f = fsqrt((x - 128) * (x - 128) + (y - 128) * (y - 128)); /* between 0 and 2 */\r
++ fixed f = fixsqrt((x - 128) * (x - 128) + (y - 128) * (y - 128)); /* between 0 and 2 */\r
+ fixed cosine = hgrcos(f << 10);\r
+ unsigned c = (cosine + 0x10000 + rand() % 0x1000) * 15 / 32768;\r
+ if(c > 63)\r
+@@ -223,8 +223,8 @@ void SetupLight1(void)
+ }\r
+ else if(line[x] == c2)\r
+ {\r
+- fixed f = fsqrt((x - 128) * (x - 128) + (y - 128) * (y - 128)) +\r
+- (fcos(x << 20) + fcos(y << 20)) / 64 + 0x10000;\r
++ fixed f = fixsqrt((x - 128) * (x - 128) + (y - 128) * (y - 128)) +\r
++ (fixcos(x << 20) + fixcos(y << 20)) / 64 + 0x10000;\r
+ /* between 0 and 4 */\r
+ fixed cosine = hgrcos(f << 11);\r
+ unsigned c = (cosine + 0x10000 + rand() % 0x1000) * 15 / 32768;\r
+@@ -264,10 +264,10 @@ void ThetaLight(fixed theta)
+ * 3 4\r
+ * 567\r
+ */\r
+- zpixel[1] = THETALIGHT_AMBIENT + fmul(THETALIGHT_POWER, s);\r
+- zpixel[3] = THETALIGHT_AMBIENT + fmul(THETALIGHT_POWER, 0x10000 - c);\r
+- zpixel[4] = THETALIGHT_AMBIENT + fmul(THETALIGHT_POWER, c);\r
+- zpixel[6] = THETALIGHT_AMBIENT + fmul(THETALIGHT_POWER, 0x10000 - s);\r
++ zpixel[1] = THETALIGHT_AMBIENT + fixmul(THETALIGHT_POWER, s);\r
++ zpixel[3] = THETALIGHT_AMBIENT + fixmul(THETALIGHT_POWER, 0x10000 - c);\r
++ zpixel[4] = THETALIGHT_AMBIENT + fixmul(THETALIGHT_POWER, c);\r
++ zpixel[6] = THETALIGHT_AMBIENT + fixmul(THETALIGHT_POWER, 0x10000 - s);\r
+ \r
+ zpixel[0] = (zpixel[1] + zpixel[3])/2;\r
+ zpixel[2] = (zpixel[1] + zpixel[4])/2;\r
+@@ -304,20 +304,20 @@ void InitSidesPhi(Seven *seven, fixed phi, fixed zBase)
+ fixed m, zCos;\r
+ int scanlineWidth = 160 / nPlayers;\r
+ \r
+- if(fcos(phi) == 0)\r
++ if(fixcos(phi) == 0)\r
+ {\r
+ phi -= 0x8000;\r
+ }\r
+- zCos = fdiv(zBase, hgrcos(phi));\r
++ zCos = fixdiv(zBase, hgrcos(phi));\r
+ m = hgrtan(phi);\r
+ \r
+ for(i = 0; i < wHt; i++)\r
+ {\r
+- fixed scanline = fdiv(i - wHt / 2, wHt / 2);\r
+- fixed mline = fmul(m, scanline);\r
+- fixed zLine = fmul(zCos, scanline);\r
+- fixed y1 = fdiv(zLine, mline + 0x10000);\r
+- fixed x1 = fdiv(zBase, mline + 0x10000);\r
++ fixed scanline = fixdiv(i - wHt / 2, wHt / 2);\r
++ fixed mline = fixmul(m, scanline);\r
++ fixed zLine = fixmul(zCos, scanline);\r
++ fixed y1 = fixdiv(zLine, mline + 0x10000);\r
++ fixed x1 = fixdiv(zBase, mline + 0x10000);\r
+ \r
+ if(x1 < 0)\r
+ {\r
+@@ -391,10 +391,10 @@ void RotateSides(Seven *seven, int theta)
+ ly = seven->leftY[i];\r
+ ry = seven->rightY[i];\r
+ \r
+- seven->leftX[i] = fmul(lx, c) - fmul(ly, s);\r
+- seven->rightX[i] = fmul(rx, c) - fmul(ry, s);\r
+- seven->leftY[i] = fmul(ly, c) + fmul(lx, s);\r
+- seven->rightY[i] = fmul(ry, c) + fmul(rx, s);\r
++ seven->leftX[i] = fixmul(lx, c) - fixmul(ly, s);\r
++ seven->rightX[i] = fixmul(rx, c) - fixmul(ry, s);\r
++ seven->leftY[i] = fixmul(ly, c) + fixmul(lx, s);\r
++ seven->rightY[i] = fixmul(ry, c) + fixmul(rx, s);\r
+ }\r
+ }\r
+ \r
+@@ -405,10 +405,10 @@ void ScaleSides(Seven *seven, int fac)
+ \r
+ for(i = 0; i < wHt; i++)\r
+ {\r
+- seven->leftX[i] = fmul(seven->leftX[i], fac);\r
+- seven->leftY[i] = fmul(seven->leftY[i], fac);\r
+- seven->rightX[i] = fmul(seven->rightX[i], fac);\r
+- seven->rightY[i] = fmul(seven->rightY[i], fac);\r
++ seven->leftX[i] = fixmul(seven->leftX[i], fac);\r
++ seven->leftY[i] = fixmul(seven->leftY[i], fac);\r
++ seven->rightX[i] = fixmul(seven->rightX[i], fac);\r
++ seven->rightY[i] = fixmul(seven->rightY[i], fac);\r
+ }\r
+ }\r
+ \r
+@@ -446,22 +446,22 @@ void DisplaceScanlines(Seven *seven, int ticks,
+ {\r
+ y = i - wHt / 2;\r
+ xOff = ((a * y / wHt + b) * y / wHt + c) * y / wHt + d +\r
+- fmul(hgrcos(theta), amplitude);\r
+- xOff += fmul((rand() & 0x7ff) - 0x400, noise);\r
++ fixmul(hgrcos(theta), amplitude);\r
++ xOff += fixmul((rand() & 0x7ff) - 0x400, noise);\r
+ theta += dtheta;\r
+ heatTheta += dheat;\r
+ \r
+- yOff = fmul(hgrsin(heatTheta), heat);\r
++ yOff = fixmul(hgrsin(heatTheta), heat);\r
+ \r
+ lx = seven->leftX[i];\r
+ rx = seven->rightX[i];\r
+ ly = seven->leftY[i];\r
+ ry = seven->rightY[i];\r
+ \r
+- seven->leftX[i] = lx + fmul(rx - lx, xOff) - fmul(ry - ly, yOff);\r
+- seven->rightX[i] = rx + fmul(rx - lx, xOff) - fmul(ry - ly, yOff);\r
+- seven->leftY[i] = ly + fmul(ry - ly, xOff) + fmul(rx - lx, yOff);\r
+- seven->rightY[i] = ry + fmul(ry - ly, xOff) + fmul(rx - lx, yOff);\r
++ seven->leftX[i] = lx + fixmul(rx - lx, xOff) - fixmul(ry - ly, yOff);\r
++ seven->rightX[i] = rx + fixmul(rx - lx, xOff) - fixmul(ry - ly, yOff);\r
++ seven->leftY[i] = ly + fixmul(ry - ly, xOff) + fixmul(rx - lx, yOff);\r
++ seven->rightY[i] = ry + fixmul(ry - ly, xOff) + fixmul(rx - lx, yOff);\r
+ }\r
+ }\r
+ \r
+--
+2.25.0
+