i965: Use offset instead of index in brw_store_register_mem64

This matches the byte based offset of brw_load_register_mem*.

The function is also moved into intel_batchbuffer.c like
brw_load_register_mem*.

Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

1 files changed, 37 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i965/intel_batchbuffer.c b/src/mesa/drivers/dri/i965/intel_batchbuffer.c
index e41f927..cd5d301 100644
--- a/src/mesa/drivers/dri/i965/intel_batchbuffer.c
+++ b/src/mesa/drivers/dri/i965/intel_batchbuffer.c
@@ -537,3 +537,40 @@ brw_load_register_mem64(struct brw_context *brw,
 {
    load_sized_register_mem(brw, reg, bo, read_domains, write_domain, offset, 2);
 }
+
+/*
+ * Write an arbitrary 64-bit register to a buffer via MI_STORE_REGISTER_MEM.
+ */
+void
+brw_store_register_mem64(struct brw_context *brw,
+                         drm_intel_bo *bo, uint32_t reg, uint32_t offset)
+{
+   assert(brw->gen >= 6);
+
+   /* MI_STORE_REGISTER_MEM only stores a single 32-bit value, so to
+    * read a full 64-bit register, we need to do two of them.
+    */
+   if (brw->gen >= 8) {
+      BEGIN_BATCH(8);
+      OUT_BATCH(MI_STORE_REGISTER_MEM | (4 - 2));
+      OUT_BATCH(reg);
+      OUT_RELOC64(bo, I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION,
+                  offset);
+      OUT_BATCH(MI_STORE_REGISTER_MEM | (4 - 2));
+      OUT_BATCH(reg + sizeof(uint32_t));
+      OUT_RELOC64(bo, I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION,
+                  offset + sizeof(uint32_t));
+      ADVANCE_BATCH();
+   } else {
+      BEGIN_BATCH(6);
+      OUT_BATCH(MI_STORE_REGISTER_MEM | (3 - 2));
+      OUT_BATCH(reg);
+      OUT_RELOC(bo, I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION,
+                offset);
+      OUT_BATCH(MI_STORE_REGISTER_MEM | (3 - 2));
+      OUT_BATCH(reg + sizeof(uint32_t));
+      OUT_RELOC(bo, I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION,
+                offset + sizeof(uint32_t));
+      ADVANCE_BATCH();
+   }
+}