[Mesa-dev] [PATCH 2/3] i965: Add a brw_load_register_reg64 helper.

[Kenneth Graunke]

It appears that we can't do this in a single command (like we do for
MI_LOAD_REGISTER_IMM) - the Skylake simulator gets rather grumpy about
the command length if I try to combine them.  No matter.

Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
---
 src/mesa/drivers/dri/i965/brw_context.h       |  2 ++
 src/mesa/drivers/dri/i965/intel_batchbuffer.c | 18 ++++++++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/src/mesa/drivers/dri/i965/brw_context.h b/src/mesa/drivers/dri/i965/brw_context.h
index c216904..b620f14 100644
--- a/src/mesa/drivers/dri/i965/brw_context.h
+++ b/src/mesa/drivers/dri/i965/brw_context.h
@@ -1463,6 +1463,8 @@ void brw_load_register_imm64(struct brw_context *brw,
                              uint32_t reg, uint64_t imm);
 void brw_load_register_reg(struct brw_context *brw, uint32_t src,
                            uint32_t dest);
+void brw_load_register_reg64(struct brw_context *brw, uint32_t src,
+                             uint32_t dest);
 void brw_store_data_imm32(struct brw_context *brw, drm_intel_bo *bo,
                           uint32_t offset, uint32_t imm);
 void brw_store_data_imm64(struct brw_context *brw, drm_intel_bo *bo,
diff --git a/src/mesa/drivers/dri/i965/intel_batchbuffer.c b/src/mesa/drivers/dri/i965/intel_batchbuffer.c
index 98b9485..77cdc0a 100644
--- a/src/mesa/drivers/dri/i965/intel_batchbuffer.c
+++ b/src/mesa/drivers/dri/i965/intel_batchbuffer.c
@@ -649,6 +649,24 @@ brw_load_register_reg(struct brw_context *brw, uint32_t src, uint32_t dest)
 }
 
 /*
+ * Copies a 64-bit register.
+ */
+void
+brw_load_register_reg64(struct brw_context *brw, uint32_t src, uint32_t dest)
+{
+   assert(brw->gen >= 8 || brw->is_haswell);
+
+   BEGIN_BATCH(6);
+   OUT_BATCH(MI_LOAD_REGISTER_REG | (3 - 2));
+   OUT_BATCH(src);
+   OUT_BATCH(dest);
+   OUT_BATCH(MI_LOAD_REGISTER_REG | (3 - 2));
+   OUT_BATCH(src + sizeof(uint32_t));
+   OUT_BATCH(dest + sizeof(uint32_t));
+   ADVANCE_BATCH();
+}
+
+/*
  * Write 32-bits of immediate data to a GPU memory buffer.
  */
 void
-- 
2.8.2