Add a check for intel-gen4asm, and rules to compile {wm,sf}_prog.h using it.

This adds assembly source for the two programs used in the textured video
implementation on the 965, which should make them easier to modify in the
future. The compiled versions are also included, so that intel-gen4asm isn't a
build requirement for people that aren't modifying these programs.

There are minor differences in the compiled versions of these programs compared
to their previous versions which were compiled with a different tool.  I
believe the changes should be harmless, and video continues to work on my
system.

1 files changed, 161 insertions, 0 deletions

diff --git a/src/packed_yuv_wm.g4a b/src/packed_yuv_wm.g4a
new file mode 100644
index 00000000..d312d170
--- /dev/null
+++ b/src/packed_yuv_wm.g4a
@@ -0,0 +1,161 @@
+/* The initial payload of the thread is always g0.
+ * WM_URB (incoming URB entries) is g3
+ * X0_R is g4
+ * X1_R is g5
+ * Y0_R is g6
+ * Y1_R is g7
+ */
+
+    /* Set up the X/Y screen coordinates of the pixels in our 4 subspans.  Each
+     * subspan is a 2x2 rectangle, and the screen x/y of the upper left of each
+     * subspan are given in GRF register 1.2 through 1.5 (which, with the word
+     * addressing below, are 1.4 through 1.11).
+     *
+     * The result is WM_X*_R and WM_Y*R being:
+     *
+     * X0: {ss0.x, ss0.x+1, ss0.x,   ss0.x+1, ss1.x, ss1.x+1, ss1.x,   ss1.x+y}
+     * Y0: {ss0.y, ss0.y,   ss0.y+1, ss0.y+1, ss1.y, ss1.y,   ss1.y+1, ss1.y+1}
+     * X1: {ss2.x, ss2.x+1, ss2.x,   ss2.x+1, ss3.x, ss3.x+1, ss3.x,   ss3.x+y}
+     * Y1: {ss2.y, ss2.y,   ss2.y+1, ss2.y+1, ss3.y, ss3.y,   ss3.y+1, ss3.y+1}
+     */
+
+    /* Set up ss0.x coordinates*/
+mov (1) g4<1>F g1.8<0,1,0>UW { align1 };
+add (1) g4.4<1>F g1.8<0,1,0>UW 1UB { align1 };
+mov (1) g4.8<1>F g1.8<0,1,0>UW { align1 };
+add (1) g4.12<1>F g1.8<0,1,0>UW 1UB { align1 };
+    /* Set up ss0.y coordinates */
+mov (1) g6<1>F g1.10<0,1,0>UW { align1 };
+mov (1) g6.4<1>F g1.10<0,1,0>UW { align1 };
+add (1) g6.8<1>F g1.10<0,1,0>UW 1UB { align1 };
+add (1) g6.12<1>F g1.10<0,1,0>UW 1UB { align1 };
+    /* set up ss1.x coordinates */
+mov (1) g4.16<1>F g1.12<0,1,0>UW { align1 };
+add (1) g4.20<1>F g1.12<0,1,0>UW 1UB { align1 };
+mov (1) g4.24<1>F g1.12<0,1,0>UW { align1 };
+add (1) g4.28<1>F g1.12<0,1,0>UW 1UB { align1 };
+    /* set up ss1.y coordinates */
+mov (1) g6.16<1>F g1.14<0,1,0>UW { align1 };
+mov (1) g6.20<1>F g1.14<0,1,0>UW { align1 };
+add (1) g6.24<1>F g1.14<0,1,0>UW 1UB { align1 };
+add (1) g6.28<1>F g1.14<0,1,0>UW 1UB { align1 };
+    /* Set up ss2.x coordinates */
+mov (1) g5<1>F g1.16<0,1,0>UW { align1 };
+add (1) g5.4<1>F g1.16<0,1,0>UW 1UB { align1 };
+mov (1) g5.8<1>F g1.16<0,1,0>UW { align1 };
+add (1) g5.12<1>F g1.16<0,1,0>UW 1UB { align1 };
+    /* Set up ss2.y coordinates */
+mov (1) g7<1>F g1.18<0,1,0>UW { align1 };
+mov (1) g7.4<1>F g1.18<0,1,0>UW { align1 };
+add (1) g7.8<1>F g1.18<0,1,0>UW 1UB { align1 };
+add (1) g7.12<1>F g1.18<0,1,0>UW 1UB { align1 };
+    /* Set up ss3.x coordinates */
+mov (1) g5.16<1>F g1.20<0,1,0>UW { align1 };
+add (1) g5.20<1>F g1.20<0,1,0>UW 1UB { align1 };
+mov (1) g5.24<1>F g1.20<0,1,0>UW { align1 };
+add (1) g5.28<1>F g1.20<0,1,0>UW 1UB { align1 };
+    /* Set up ss3.y coordinates */
+mov (1) g7.16<1>F g1.22<0,1,0>UW { align1 };
+mov (1) g7.20<1>F g1.22<0,1,0>UW { align1 };
+add (1) g7.24<1>F g1.22<0,1,0>UW 1UB { align1 };
+add (1) g7.28<1>F g1.22<0,1,0>UW 1UB { align1 };
+
+    /* Now, map these screen space coordinates into texture coordinates. */
+    /* subtract screen-space X origin of vertex 0. */
+add (8) g4<1>F g4<8,8,1>F -g1<0,1,0>F { align1 };
+add (8) g5<1>F g5<8,8,1>F -g1<0,1,0>F { align1 };
+    /* scale by texture X increment */
+mul (8) g4<1>F g4<8,8,1>F g3<0,1,0>F { align1 };
+mul (8) g5<1>F g5<8,8,1>F g3<0,1,0>F { align1 };
+    /* add in texture X offset */
+add (8) g4<1>F g4<8,8,1>F g3.12<0,1,0>F { align1 };
+add (8) g5<1>F g5<8,8,1>F g3.12<0,1,0>F { align1 };
+    /* subtract screen-space Y origin of vertex 0. */
+add (8) g6<1>F g6<8,8,1>F -g1.4<0,1,0>F { align1 };
+add (8) g7<1>F g7<8,8,1>F -g1.4<0,1,0>F { align1 };
+    /* scale by texture Y increment */
+mul (8) g6<1>F g6<8,8,1>F g3.20<0,1,0>F { align1 };
+mul (8) g7<1>F g7<8,8,1>F g3.20<0,1,0>F { align1 };
+    /* add in texture Y offset */
+add (8) g6<1>F g6<8,8,1>F g3.28<0,1,0>F { align1 };
+add (8) g7<1>F g7<8,8,1>F g3.28<0,1,0>F { align1 };
+    /* sampler  */
+mov (8) m1<1>F g4<8,8,1>F { align1 };
+mov (8) m2<1>F g5<8,8,1>F { align1 };
+mov (8) m3<1>F g6<8,8,1>F { align1 };
+mov (8) m4<1>F g7<8,8,1>F { align1 };
+
+    /*
+     * g0 holds the PS thread payload, which (oddly) contains
+     * precisely what the sampler wants to see in m0
+     */
+send  (16) 0 g12<1>UW g0<8,8,1>UW sampler (1,0,F) mlen 5 rlen 8 { align1 };
+mov (8) g19<1>UW g19<8,8,1>UW { align1 };
+
+    /* color space conversion function:
+     * R = Clamp ( 1.164(Y-16/255) + 1.596(Cr-128/255), 0, 1)
+     * G = Clamp ( 1.164(Y-16/255) - 0.813(Cr-128/255) - 0.392(Cb-128/255), 0, 1)
+     * B = Clamp ( 1.164(Y-16/255) + 2.017(Cb-128/255), 0, 1)
+     *
+     * Y is g14, g15.
+     * Cr is g12, g13.
+     * Cb is g16, g17.
+     *
+     * R is g2, g6.
+     * G is g3, g7.
+     * B is g4, g8.
+     */
+	/* Y = Y - 16/255 */
+add (8) g14<1>F g14<8,8,1>F -0.0627451F { align1 };
+	/* Cr = Cr - 128/255 */
+add (8) g12<1>F g12<8,8,1>F -0.501961F { align1 };
+	/* Cb = Cb - 128 / 255 */
+add (8) g16<1>F g16<8,8,1>F -0.501961F { align1 };
+	/* Y = Y * 1.164 */
+mul (8) g14<1>F g14<8,8,1>F 1.164F { align1 };
+	/* acc = 1.596 * Cr */
+mul (8) null g12<8,8,1>F 1.596F { align1 };
+	/* R = acc + Y */
+mac.sat (8) m2<1>F g14<8,8,1>F 1F { align1  };
+	/* acc = Cr * -0.813 */
+mul (8) null g12<8,8,1>F -0.813F { align1 };
+	/* acc += Cb * -0.392 */
+mac (8) null g16<8,8,1>F -0.392F { align1 };
+	/* G = acc + Y */
+mac.sat (8) m3<1>F g14<8,8,1>F 1F { align1  };
+	/* acc = Cb * 2.017 */
+mul (8) null g16<8,8,1>F 2.017F { align1 };
+	/* B = acc + Y */
+mac.sat (8) m4<1>F g14<8,8,1>F 1F { align1  };
+ /* and do it again */
+add (8) g15<1>F g15<8,8,1>F -0.0627451F { align1 };
+add (8) g13<1>F g13<8,8,1>F -0.501961F { align1 };
+add (8) g17<1>F g17<8,8,1>F -0.501961F { align1 };
+mul (8) g15<1>F g15<8,8,1>F 1.164F { align1 };
+mul (8) null g13<8,8,1>F 1.596F { align1 };
+mac.sat (8) m6<1>F g15<8,8,1>F 1F { align1  };
+mul (8) null g13<8,8,1>F -0.813F { align1 };
+mac (8) null g17<8,8,1>F -0.392F { align1 };
+mac.sat (8) m7<1>F g15<8,8,1>F 1F { align1  };
+mul (8) null g17<8,8,1>F 2.017F { align1 };
+mac.sat (8) m8<1>F g15<8,8,1>F 1F { align1  };
+
+   /* Pass through control information:
+    */
+mov (8) m1<1>UD g1<8,8,1>UD { align1 mask_disable };
+   /* Send framebuffer write message: XXX: acc0? */
+send (16) 0 null g0<8,8,1>UW write (
+	0, /* binding table index 0 */
+	8, /* pixel scoreboard clear */
+	4, /* render target write */
+	0 /* no write commit message */
+	) mlen 10 rlen 0 { align1 EOT };
+   /* padding */
+nop;
+nop;
+nop;
+nop;
+nop;
+nop;
+nop;
+nop;