r300-gallium: r500-fs: MUL.

src/gallium/drivers/r300/r300_state_shader.c

@@ -366,6 +366,13 @@ static void r500_fs_instruction(struct r500_fragment_shader* fs,
             fs->instructions[i].inst4 &= ~R500_SWIZ_ALPHA_A(0x7);
             fs->instructions[i].inst4 |= R500_SWIZ_ALPHA_A(R500_SWIZZLE_ONE);
             break;
+        case TGSI_OPCODE_MUL:
+            /* Force our src2 to zero */
+            inst->FullSrcRegisters[2] = r500_constant_zero;
+            r500_emit_maths(fs, assembler, inst->FullSrcRegisters,
+                    &inst->FullDstRegisters[0], inst->Instruction.Opcode, 3,
+                    false);
+            break;
         case TGSI_OPCODE_MAD:
             r500_emit_maths(fs, assembler, inst->FullSrcRegisters,
                     &inst->FullDstRegisters[0], inst->Instruction.Opcode, 3,

src/gallium/drivers/r300/r300_state_shader.h

@@ -30,6 +30,7 @@
 #include "r300_reg.h"
 #include "r300_screen.h"
 
+/* XXX this all should find its way back to r300_reg */
 /* Swizzle tools */
 #define R500_SWIZZLE_ZERO 4
 #define R500_SWIZZLE_HALF 5
@@ -57,6 +58,28 @@
 #define R500_ALU_WMASK(x) ((x) << 11)
 #define R500_ALU_OMASK(x) ((x) << 15)
 
+/* TGSI constants. TGSI is like XML: If it can't solve your problems, you're
+ * not using enough of it. */
+static const struct tgsi_full_src_register r500_constant_zero = {
+    .SrcRegister.Extended = TRUE,
+    .SrcRegister.File = TGSI_FILE_TEMPORARY,
+    .SrcRegister.Index = 0,
+    .SrcRegisterExtSwz.ExtSwizzleX = TGSI_EXTSWIZZLE_ZERO,
+    .SrcRegisterExtSwz.ExtSwizzleY = TGSI_EXTSWIZZLE_ZERO,
+    .SrcRegisterExtSwz.ExtSwizzleZ = TGSI_EXTSWIZZLE_ZERO,
+    .SrcRegisterExtSwz.ExtSwizzleW = TGSI_EXTSWIZZLE_ZERO,
+};
+
+static const struct tgsi_full_src_register r500_constant_one = {
+    .SrcRegister.Extended = TRUE,
+    .SrcRegister.File = TGSI_FILE_TEMPORARY,
+    .SrcRegister.Index = 0,
+    .SrcRegisterExtSwz.ExtSwizzleX = TGSI_EXTSWIZZLE_ONE,
+    .SrcRegisterExtSwz.ExtSwizzleY = TGSI_EXTSWIZZLE_ONE,
+    .SrcRegisterExtSwz.ExtSwizzleZ = TGSI_EXTSWIZZLE_ONE,
+    .SrcRegisterExtSwz.ExtSwizzleW = TGSI_EXTSWIZZLE_ONE,
+};
+
 /* Temporary struct used to hold assembly state while putting together
  * fragment programs. */
 struct r300_fs_asm {