i965: Add a header_present flag for setting up dp read messages.

As of gen7, we can skip the header on some messages, and this can make
optimization on those messages much nicer when you've got GRFs instead of MRFs
as the source.

diff --git a/src/mesa/drivers/dri/i965/brw_eu.h b/src/mesa/drivers/dri/i965/brw_eu.h
index fce4f15fbabe3a6d4b2be8cf20573866f6b8888d..8c3a634e2ccfa013e123b0e741dd7be78b607fc8 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_eu.h
+++ b/src/mesa/drivers/dri/i965/brw_eu.h
@@ -907,6 +907,7 @@ void brw_set_dp_read_message(struct brw_compile *p,
                             GLuint msg_type,
                             GLuint target_cache,
                             GLuint msg_length,
+                             bool header_present,
                             GLuint response_length);
 
 void brw_set_dp_write_message(struct brw_compile *p,

diff --git a/src/mesa/drivers/dri/i965/brw_eu_emit.c b/src/mesa/drivers/dri/i965/brw_eu_emit.c
index 72fb5c5ae2c8b8f0af83f96b608c0923c847577f..8a629ff0b406c74227520962cd6279dc00f2d828 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_eu_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_eu_emit.c
@@ -620,6 +620,7 @@ brw_set_dp_read_message(struct brw_compile *p,
                        GLuint msg_type,
                        GLuint target_cache,
                        GLuint msg_length,
+                        bool header_present,
                        GLuint response_length)
 {
    struct brw_context *brw = p->brw;
@@ -638,7 +639,7 @@ brw_set_dp_read_message(struct brw_compile *p,
    }
 
    brw_set_message_descriptor(p, insn, sfid, msg_length, response_length,
-                             true, false);
+                             header_present, false);
 
    if (intel->gen >= 7) {
       insn->bits3.gen7_dp.binding_table_index = binding_table_index;
@@ -1967,6 +1968,7 @@ brw_oword_block_read_scratch(struct brw_compile *p,
                              BRW_DATAPORT_READ_MESSAGE_OWORD_BLOCK_READ, /* msg_type */
                              BRW_DATAPORT_READ_TARGET_RENDER_CACHE,
                              1, /* msg_length */
+                              true, /* header_present */
                              rlen);
    }
 }
@@ -2024,6 +2026,7 @@ void brw_oword_block_read(struct brw_compile *p,
                           BRW_DATAPORT_READ_MESSAGE_OWORD_BLOCK_READ,
                           BRW_DATAPORT_READ_TARGET_DATA_CACHE,
                           1, /* msg_length */
+                           true, /* header_present */
                           1); /* response_length (1 reg, 2 owords!) */
 
    brw_pop_insn_state(p);

diff --git a/src/mesa/drivers/dri/i965/brw_vec4_emit.cpp b/src/mesa/drivers/dri/i965/brw_vec4_emit.cpp
index 5637b220672330953b7eca11a72d9807e2c23db6..7609d92a72ff783b42b97f6fa985a71b8329fad8 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_vec4_emit.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4_emit.cpp
@@ -463,6 +463,7 @@ vec4_generator::generate_scratch_read(vec4_instruction *inst,
                           msg_type,
                           BRW_DATAPORT_READ_TARGET_RENDER_CACHE,
                           2, /* mlen */
+                           true, /* header_present */
                           1 /* rlen */);
 }
 
@@ -596,6 +597,7 @@ vec4_generator::generate_pull_constant_load(vec4_instruction *inst,
                           msg_type,
                           BRW_DATAPORT_READ_TARGET_DATA_CACHE,
                           2, /* mlen */
+                           true, /* header_present */
                           1 /* rlen */);
 }