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authorBrian Paul <brianp@vmware.com>2009-03-31 10:50:55 -0600
committerBrian Paul <brianp@vmware.com>2009-04-03 09:07:03 -0600
commit8127e49b93820d1768e2d298bbe238dd55c20732 (patch)
tree6db170c286bc46ebef6903c0bbe0d14365f88bda /src/mesa/drivers/dri/i965/brw_eu_emit.c
parent6b18a8d3e7114a1af931a2fc20a1e23cb2d7789c (diff)
i965: added new brw_dp_READ_4() function
Used to read float[4] vectors from the constant buffer/surface.
Diffstat (limited to 'src/mesa/drivers/dri/i965/brw_eu_emit.c')
-rw-r--r--src/mesa/drivers/dri/i965/brw_eu_emit.c50
1 files changed, 50 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_eu_emit.c b/src/mesa/drivers/dri/i965/brw_eu_emit.c
index 03e4cdde33..b149f0f21f 100644
--- a/src/mesa/drivers/dri/i965/brw_eu_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_eu_emit.c
@@ -950,6 +950,56 @@ void brw_dp_READ_16( struct brw_compile *p,
}
+/**
+ * Read a float[4] vector from the data port Data Cache (const buffer).
+ * Scratch offset should be a multiple of 16.
+ * Used for fetching shader constants.
+ * If relAddr is true, we'll do an indirect fetch using the address register.
+ */
+void brw_dp_READ_4( struct brw_compile *p,
+ struct brw_reg dest,
+ GLuint msg_reg_nr,
+ GLboolean relAddr,
+ GLuint scratch_offset,
+ GLuint bind_table_index )
+{
+ {
+ brw_push_insn_state(p);
+ brw_set_compression_control(p, BRW_COMPRESSION_NONE);
+ brw_set_mask_control(p, BRW_MASK_DISABLE);
+
+ /* set message header global offset field (reg 0, element 2) */
+ brw_MOV(p,
+ retype(brw_vec1_grf(0, 2), BRW_REGISTER_TYPE_UD),
+ brw_imm_d(scratch_offset));
+ brw_pop_insn_state(p);
+ }
+
+ {
+ struct brw_instruction *insn = next_insn(p, BRW_OPCODE_SEND);
+
+ insn->header.predicate_control = 0; /* XXX */
+ insn->header.compression_control = BRW_COMPRESSION_NONE;
+ insn->header.destreg__conditonalmod = msg_reg_nr;
+
+ /* cast dest to a uword[8] vector */
+ dest = retype(vec8(dest), BRW_REGISTER_TYPE_UW);
+
+ brw_set_dest(insn, dest);
+ brw_set_src0(insn, retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UW));
+
+ brw_set_dp_read_message(insn,
+ bind_table_index, /* binding table index (255=stateless) */
+ 0, /* msg_control (0 means 1 Oword) */
+ BRW_DATAPORT_READ_MESSAGE_OWORD_BLOCK_READ, /* msg_type */
+ 0, /* source cache = data cache */
+ 1, /* msg_length */
+ 2, /* response_length */
+ 0); /* eot */
+ }
+}
+
+
void brw_fb_WRITE(struct brw_compile *p,
struct brw_reg dest,
GLuint msg_reg_nr,