Mesa (gallium-0.1): tgis: SSE code generator doesn' t yet support indirect addressing of temp regs

[Jose Fonseca]

Module: Mesa
Branch: gallium-0.1
Commit: 340fdf86f3250595341adeea946e1aee8acb56ce
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=340fdf86f3250595341adeea946e1aee8acb56ce

Author: Brian Paul <brianp at vmware.com>
Date:   Fri Apr 24 17:08:59 2009 -0600

tgis: SSE code generator doesn't yet support indirect addressing of temp regs

Fall back to interpreter in this case.

---

 src/gallium/auxiliary/tgsi/tgsi_sse2.c |   29 +++++++++++++++++++++++++++++
 1 files changed, 29 insertions(+), 0 deletions(-)

diff --git a/src/gallium/auxiliary/tgsi/tgsi_sse2.c b/src/gallium/auxiliary/tgsi/tgsi_sse2.c
index 844c22f..eff1bb0 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_sse2.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_sse2.c
@@ -1301,6 +1301,31 @@ emit_cmp(
    }
 }
 
+
+/**
+ * Check if inst src/dest regs use indirect addressing into temporary
+ * register file.
+ */
+static boolean
+indirect_temp_reference(const struct tgsi_full_instruction *inst)
+{
+   uint i;
+   for (i = 0; i < inst->Instruction.NumSrcRegs; i++) {
+      const struct tgsi_full_src_register *reg = &inst->FullSrcRegisters[i];
+      if (reg->SrcRegister.File == TGSI_FILE_TEMPORARY &&
+          reg->SrcRegister.Indirect)
+         return TRUE;
+   }
+   for (i = 0; i < inst->Instruction.NumDstRegs; i++) {
+      const struct tgsi_full_dst_register *reg = &inst->FullDstRegisters[i];
+      if (reg->DstRegister.File == TGSI_FILE_TEMPORARY &&
+          reg->DstRegister.Indirect)
+         return TRUE;
+   }
+   return FALSE;
+}
+
+
 static int
 emit_instruction(
    struct x86_function *func,
@@ -1308,6 +1333,10 @@ emit_instruction(
 {
    unsigned chan_index;
 
+   /* we can't handle indirect addressing into temp register file yet */
+   if (indirect_temp_reference(inst))
+      return FALSE;
+
    switch (inst->Instruction.Opcode) {
    case TGSI_OPCODE_ARL:
       FOR_EACH_DST0_ENABLED_CHANNEL( *inst, chan_index ) {