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i965: added new brw_dp_READ_4() function

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Used to read float[4] vectors from the constant buffer/surface.
This commit is contained in:
Brian Paul 2009-03-31 10:50:55 -06:00
parent 6b18a8d3e7
commit 8127e49b93
2 changed files with 57 additions and 0 deletions
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7
src/mesa/drivers/dri/i965/brw_eu.h
View file

@ -851,6 +851,13 @@ void brw_dp_READ_16( struct brw_compile *p,
GLuint msg_reg_nr,
GLuint scratch_offset );
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 );
void brw_dp_WRITE_16( struct brw_compile *p,
struct brw_reg src,
GLuint msg_reg_nr,

50
src/mesa/drivers/dri/i965/brw_eu_emit.c
View file

@ -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,