Added few more stubs so that control reaches to DestroyDevice().

[mesa.git] / src / freedreno / afuc / disasm.c

diff --git a/src/freedreno/afuc/disasm.c b/src/freedreno/afuc/disasm.c
index f687058f615edfe77d550e3ca9baf288d98005cb..0e013f59a3a03deddf977b34681e0c100e4d44f0 100644 (file)
--- a/src/freedreno/afuc/disasm.c
+++ b/src/freedreno/afuc/disasm.c
@@ -506,6 +506,8 @@ static void disasm(uint32_t *buf, int sizedwords)
 
                        if (rep)
                                printf("(rep)");
+                       if (instr->alu.xmov)
+                               printf("(xmov%d)", instr->alu.xmov);
 
                        /* special case mnemonics:
                         *   reading $00 seems to always yield zero, and so:
@@ -531,10 +533,58 @@ static void disasm(uint32_t *buf, int sizedwords)
                        /* print out unexpected bits: */
                        if (verbose) {
                                if (instr->alu.pad)
-                                       printerr("  (pad=%03x)", instr->alu.pad);
+                                       printerr("  (pad=%01x)", instr->alu.pad);
                                if (instr->alu.src1 && !src1)
                                        printerr("  (src1=%02x)", instr->alu.src1);
                        }
+
+                       /* xmov is a modifier that makes the processor execute up to 3
+                        * extra mov's after the current instruction. Given an ALU
+                        * instruction:
+                        *
+                        * (xmovN) alu $dst, $src1, $src2
+                        *
+                        * In all of the uses in the firmware blob, $dst and $src2 are one
+                        * of the "special" registers $data, $addr, $addr2. I've observed
+                        * that if $dst isn't "special" then it's replaced with $00
+                        * instead of $data, but I haven't checked what happens if $src2
+                        * isn't "special".  Anyway, in the usual case, the HW produces a
+                        * count M = min(N, $rem) and then does the following:
+                        *
+                        * M = 1:
+                        * mov $data, $src2
+                        *
+                        * M = 2:
+                        * mov $data, $src2
+                        * mov $data, $src2
+                        *
+                        * M = 3:
+                        * mov $data, $src2
+                        * mov $dst, $src2 (special case for CP_CONTEXT_REG_BUNCH)
+                        * mov $data, $src2
+                        *
+                        * It seems to be frequently used in combination with (rep) to
+                        * provide a kind of hardware-based loop unrolling, and there's
+                        * even a special case in the ISA to be able to do this with
+                        * CP_CONTEXT_REG_BUNCH. However (rep) isn't required.
+                        *
+                        * This dumps the expected extra instructions, assuming that $rem
+                        * isn't too small.
+                        */
+                       if (verbose && instr->alu.xmov) {
+                               for (int i = 0; i < instr->alu.xmov; i++) {
+                                       printf("\n        ; mov ");
+                                       if (instr->alu.dst < 0x1d)
+                                               printf("$00");
+                                       else if (instr->alu.xmov == 3 && i == 1)
+                                               print_dst(instr->alu.dst);
+                                       else
+                                               printf("$data");
+                                       printf(", ");
+                                       print_src(instr->alu.src2);
+                               }
+                       }
+
                        break;
                }
                case OPC_CWRITE6: