void
vec4_generator::generate_pull_constant_load(vec4_instruction *inst,
struct brw_reg dst,
struct brw_reg index,
struct brw_reg offset)
{
assert(index.file == BRW_IMMEDIATE_VALUE &&
index.type == BRW_REGISTER_TYPE_UD);
uint32_t surf_index = index.dw1.ud;
if (intel->gen == 7) {
gen6_resolve_implied_move(p, &offset, inst->base_mrf);
brw_instruction *insn = brw_next_insn(p, BRW_OPCODE_SEND);
brw_set_dest(p, insn, dst);
brw_set_src0(p, insn, offset);
brw_set_sampler_message(p, insn,
surf_index,
0, /* LD message ignores sampler unit */
GEN5_SAMPLER_MESSAGE_SAMPLE_LD,
1, /* rlen */
1, /* mlen */
false, /* no header */
BRW_SAMPLER_SIMD_MODE_SIMD4X2,
0);
return;
}
struct brw_reg header = brw_vec8_grf(0, 0);
gen6_resolve_implied_move(p, &header, inst->base_mrf);
brw_MOV(p, retype(brw_message_reg(inst->base_mrf + 1), BRW_REGISTER_TYPE_D),
offset);
uint32_t msg_type;
if (intel->gen >= 6)
msg_type = GEN6_DATAPORT_READ_MESSAGE_OWORD_DUAL_BLOCK_READ;
else if (intel->gen == 5 || intel->is_g4x)
msg_type = G45_DATAPORT_READ_MESSAGE_OWORD_DUAL_BLOCK_READ;
else
msg_type = BRW_DATAPORT_READ_MESSAGE_OWORD_DUAL_BLOCK_READ;
/* Each of the 8 channel enables is considered for whether each
* dword is written.
*/
struct brw_instruction *send = brw_next_insn(p, BRW_OPCODE_SEND);
brw_set_dest(p, send, dst);
brw_set_src0(p, send, header);
if (intel->gen < 6)
send->header.destreg__conditionalmod = inst->base_mrf;
brw_set_dp_read_message(p, send,
surf_index,
BRW_DATAPORT_OWORD_DUAL_BLOCK_1OWORD,
msg_type,
BRW_DATAPORT_READ_TARGET_DATA_CACHE,
2, /* mlen */
1 /* rlen */);
}
/**
* Extended math function, float[16].
* Use 2 send instructions.
*/
void brw_math_16( struct brw_compile *p,
struct brw_reg dest,
GLuint function,
GLuint saturate,
GLuint msg_reg_nr,
struct brw_reg src,
GLuint precision )
{
struct brw_instruction *insn;
GLuint msg_length = (function == BRW_MATH_FUNCTION_POW) ? 2 : 1;
GLuint response_length = (function == BRW_MATH_FUNCTION_SINCOS) ? 2 : 1;
/* First instruction:
*/
brw_push_insn_state(p);
brw_set_predicate_control_flag_value(p, 0xff);
brw_set_compression_control(p, BRW_COMPRESSION_NONE);
insn = next_insn(p, BRW_OPCODE_SEND);
insn->header.destreg__conditionalmod = msg_reg_nr;
brw_set_dest(insn, dest);
brw_set_src0(insn, src);
brw_set_math_message(p->brw,
insn,
msg_length, response_length,
function,
BRW_MATH_INTEGER_UNSIGNED,
precision,
saturate,
BRW_MATH_DATA_VECTOR);
/* Second instruction:
*/
insn = next_insn(p, BRW_OPCODE_SEND);
insn->header.compression_control = BRW_COMPRESSION_2NDHALF;
insn->header.destreg__conditionalmod = msg_reg_nr+1;
brw_set_dest(insn, offset(dest,1));
brw_set_src0(insn, src);
brw_set_math_message(p->brw,
insn,
msg_length, response_length,
function,
BRW_MATH_INTEGER_UNSIGNED,
precision,
saturate,
BRW_MATH_DATA_VECTOR);
brw_pop_insn_state(p);
}
/* EU takes the value from the flag register and pushes it onto some
* sort of a stack (presumably merging with any flag value already on
* the stack). Within an if block, the flags at the top of the stack
* control execution on each channel of the unit, eg. on each of the
* 16 pixel values in our wm programs.
*
* When the matching 'else' instruction is reached (presumably by
* countdown of the instruction count patched in by our ELSE/ENDIF
* functions), the relevent flags are inverted.
*
* When the matching 'endif' instruction is reached, the flags are
* popped off. If the stack is now empty, normal execution resumes.
*
* No attempt is made to deal with stack overflow (14 elements?).
*/
struct brw_instruction *brw_IF(struct brw_compile *p, GLuint execute_size)
{
struct brw_instruction *insn;
if (p->single_program_flow) {
assert(execute_size == BRW_EXECUTE_1);
insn = next_insn(p, BRW_OPCODE_ADD);
insn->header.predicate_inverse = 1;
} else {
insn = next_insn(p, BRW_OPCODE_IF);
}
/* Override the defaults for this instruction:
*/
brw_set_dest(insn, brw_ip_reg());
brw_set_src0(insn, brw_ip_reg());
brw_set_src1(insn, brw_imm_d(0x0));
insn->header.execution_size = execute_size;
insn->header.compression_control = BRW_COMPRESSION_NONE;
insn->header.predicate_control = BRW_PREDICATE_NORMAL;
insn->header.mask_control = BRW_MASK_ENABLE;
if (!p->single_program_flow)
insn->header.thread_control = BRW_THREAD_SWITCH;
p->current->header.predicate_control = BRW_PREDICATE_NONE;
return insn;
}
void brw_NOP(struct brw_compile *p)
{
struct brw_instruction *insn = next_insn(p, BRW_OPCODE_NOP);
brw_set_dest(insn, retype(brw_vec4_grf(0,0), BRW_REGISTER_TYPE_UD));
brw_set_src0(insn, retype(brw_vec4_grf(0,0), BRW_REGISTER_TYPE_UD));
brw_set_src1(insn, brw_imm_ud(0x0));
}
void brw_ff_sync(struct brw_compile *p,
struct brw_reg dest,
GLuint msg_reg_nr,
struct brw_reg src0,
GLboolean allocate,
GLboolean used,
GLuint msg_length,
GLuint response_length,
GLboolean eot,
GLboolean writes_complete,
GLuint offset,
GLuint swizzle)
{
struct brw_instruction *insn = next_insn(p, BRW_OPCODE_SEND);
assert(msg_length < 16);
brw_set_dest(insn, dest);
brw_set_src0(insn, src0);
brw_set_src1(insn, brw_imm_d(0));
insn->header.destreg__conditionalmod = msg_reg_nr;
brw_set_ff_sync_message(p->brw,
insn,
allocate,
used,
msg_length,
response_length,
eot,
writes_complete,
offset,
swizzle);
}
void brw_fb_WRITE(struct brw_compile *p,
struct brw_reg dest,
GLuint msg_reg_nr,
struct brw_reg src0,
GLuint binding_table_index,
GLuint msg_length,
GLuint response_length,
GLboolean eot)
{
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__conditionalmod = msg_reg_nr;
brw_set_dest(insn, dest);
brw_set_src0(insn, src0);
brw_set_dp_write_message(p->brw,
insn,
binding_table_index,
BRW_DATAPORT_RENDER_TARGET_WRITE_SIMD16_SINGLE_SOURCE, /* msg_control */
BRW_DATAPORT_WRITE_MESSAGE_RENDER_TARGET_WRITE, /* msg_type */
msg_length,
1, /* pixel scoreboard */
response_length,
eot);
}
/* To integrate with the above, it makes sense that the comparison
* instruction should populate the flag register. It might be simpler
* just to use the flag reg for most WM tasks?
*/
void brw_CMP(struct brw_compile *p,
struct brw_reg dest,
GLuint conditional,
struct brw_reg src0,
struct brw_reg src1)
{
struct brw_instruction *insn = next_insn(p, BRW_OPCODE_CMP);
insn->header.destreg__conditionalmod = conditional;
brw_set_dest(insn, dest);
brw_set_src0(insn, src0);
brw_set_src1(insn, src1);
/* guess_execution_size(insn, src0); */
/* Make it so that future instructions will use the computed flag
* value until brw_set_predicate_control_flag_value() is called
* again.
*/
if (dest.file == BRW_ARCHITECTURE_REGISTER_FILE &&
dest.nr == 0) {
p->current->header.predicate_control = BRW_PREDICATE_NORMAL;
p->flag_value = 0xff;
}
}
/** Extended math function, float[8].
*/
void brw_math( struct brw_compile *p,
struct brw_reg dest,
GLuint function,
GLuint saturate,
GLuint msg_reg_nr,
struct brw_reg src,
GLuint data_type,
GLuint precision )
{
struct brw_instruction *insn = next_insn(p, BRW_OPCODE_SEND);
GLuint msg_length = (function == BRW_MATH_FUNCTION_POW) ? 2 : 1;
GLuint response_length = (function == BRW_MATH_FUNCTION_SINCOS) ? 2 : 1;
/* Example code doesn't set predicate_control for send
* instructions.
*/
insn->header.predicate_control = 0;
insn->header.destreg__conditionalmod = msg_reg_nr;
brw_set_dest(insn, dest);
brw_set_src0(insn, src);
brw_set_math_message(p->brw,
insn,
msg_length, response_length,
function,
BRW_MATH_INTEGER_UNSIGNED,
precision,
saturate,
data_type);
}
struct brw_instruction *brw_WHILE(struct brw_compile *p,
struct brw_instruction *do_insn)
{
struct brw_instruction *insn;
if (p->single_program_flow)
insn = next_insn(p, BRW_OPCODE_ADD);
else
insn = next_insn(p, BRW_OPCODE_WHILE);
brw_set_dest(insn, brw_ip_reg());
brw_set_src0(insn, brw_ip_reg());
brw_set_src1(insn, brw_imm_d(0x0));
insn->header.compression_control = BRW_COMPRESSION_NONE;
if (p->single_program_flow) {
insn->header.execution_size = BRW_EXECUTE_1;
insn->bits3.d = (do_insn - insn) * 16;
} else {
insn->header.execution_size = do_insn->header.execution_size;
assert(do_insn->header.opcode == BRW_OPCODE_DO);
insn->bits3.if_else.jump_count = do_insn - insn + 1;
insn->bits3.if_else.pop_count = 0;
insn->bits3.if_else.pad0 = 0;
}
/* insn->header.mask_control = BRW_MASK_ENABLE; */
/* insn->header.mask_control = BRW_MASK_DISABLE; */
p->current->header.predicate_control = BRW_PREDICATE_NONE;
return insn;
}
void brw_ENDIF(struct brw_compile *p,
struct brw_instruction *patch_insn)
{
GLuint br = 1;
if (BRW_IS_IGDNG(p->brw))
br = 2;
if (p->single_program_flow) {
/* In single program flow mode, there's no need to execute an ENDIF,
* since we don't need to do any stack operations, and if we're executing
* currently, we want to just continue executing.
*/
struct brw_instruction *next = &p->store[p->nr_insn];
assert(patch_insn->header.opcode == BRW_OPCODE_ADD);
patch_insn->bits3.ud = (next - patch_insn) * 16;
} else {
struct brw_instruction *insn = next_insn(p, BRW_OPCODE_ENDIF);
brw_set_dest(insn, retype(brw_vec4_grf(0,0), BRW_REGISTER_TYPE_UD));
brw_set_src0(insn, retype(brw_vec4_grf(0,0), BRW_REGISTER_TYPE_UD));
brw_set_src1(insn, brw_imm_d(0x0));
insn->header.compression_control = BRW_COMPRESSION_NONE;
insn->header.execution_size = patch_insn->header.execution_size;
insn->header.mask_control = BRW_MASK_ENABLE;
insn->header.thread_control = BRW_THREAD_SWITCH;
assert(patch_insn->bits3.if_else.jump_count == 0);
/* Patch the if or else instructions to point at this or the next
* instruction respectively.
*/
if (patch_insn->header.opcode == BRW_OPCODE_IF) {
/* Automagically turn it into an IFF:
*/
patch_insn->header.opcode = BRW_OPCODE_IFF;
patch_insn->bits3.if_else.jump_count = br * (insn - patch_insn + 1);
patch_insn->bits3.if_else.pop_count = 0;
patch_insn->bits3.if_else.pad0 = 0;
} else if (patch_insn->header.opcode == BRW_OPCODE_ELSE) {
patch_insn->bits3.if_else.jump_count = br * (insn - patch_insn + 1);
patch_insn->bits3.if_else.pop_count = 1;
patch_insn->bits3.if_else.pad0 = 0;
} else {
assert(0);
}
/* Also pop item off the stack in the endif instruction:
*/
insn->bits3.if_else.jump_count = 0;
insn->bits3.if_else.pop_count = 1;
insn->bits3.if_else.pad0 = 0;
}
}
static struct brw_instruction *brw_alu1( struct brw_compile *p,
GLuint opcode,
struct brw_reg dest,
struct brw_reg src )
{
struct brw_instruction *insn = next_insn(p, opcode);
brw_set_dest(insn, dest);
brw_set_src0(insn, src);
return insn;
}
struct brw_instruction *brw_CONT(struct brw_compile *p)
{
struct brw_instruction *insn;
insn = next_insn(p, BRW_OPCODE_CONTINUE);
brw_set_dest(insn, brw_ip_reg());
brw_set_src0(insn, brw_ip_reg());
brw_set_src1(insn, brw_imm_d(0x0));
insn->header.compression_control = BRW_COMPRESSION_NONE;
insn->header.execution_size = BRW_EXECUTE_8;
/* insn->header.mask_control = BRW_MASK_DISABLE; */
insn->bits3.if_else.pad0 = 0;
return insn;
}
/**
* Read a float[4] vector from the data port Data Cache (const buffer).
* Location (in buffer) 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,
GLboolean relAddr,
GLuint location,
GLuint bind_table_index )
{
/* XXX: relAddr not implemented */
GLuint msg_reg_nr = 1;
{
struct brw_reg b;
brw_push_insn_state(p);
brw_set_predicate_control(p, BRW_PREDICATE_NONE);
brw_set_compression_control(p, BRW_COMPRESSION_NONE);
brw_set_mask_control(p, BRW_MASK_DISABLE);
/* Setup MRF[1] with location/offset into const buffer */
b = brw_message_reg(msg_reg_nr);
b = retype(b, BRW_REGISTER_TYPE_UD);
/* XXX I think we're setting all the dwords of MRF[1] to 'location'.
* when the docs say only dword[2] should be set. Hmmm. But it works.
*/
brw_MOV(p, b, brw_imm_ud(location));
brw_pop_insn_state(p);
}
{
struct brw_instruction *insn = next_insn(p, BRW_OPCODE_SEND);
insn->header.predicate_control = BRW_PREDICATE_NONE;
insn->header.compression_control = BRW_COMPRESSION_NONE;
insn->header.destreg__conditionalmod = msg_reg_nr;
insn->header.mask_control = BRW_MASK_DISABLE;
/* cast dest to a uword[8] vector */
dest = retype(vec8(dest), BRW_REGISTER_TYPE_UW);
brw_set_dest(insn, dest);
brw_set_src0(insn, brw_null_reg());
brw_set_dp_read_message(p->brw,
insn,
bind_table_index,
0, /* msg_control (0 means 1 Oword) */
BRW_DATAPORT_READ_MESSAGE_OWORD_BLOCK_READ, /* msg_type */
0, /* source cache = data cache */
1, /* msg_length */
1, /* response_length (1 Oword) */
0); /* eot */
}
}
static void brw_fb_write(struct brw_compile *p, int dw)
{
struct brw_instruction *insn;
unsigned msg_control, msg_type, msg_len;
struct brw_reg src0;
bool header;
if (dw == 16) {
brw_set_compression_control(p, BRW_COMPRESSION_COMPRESSED);
msg_control = BRW_DATAPORT_RENDER_TARGET_WRITE_SIMD16_SINGLE_SOURCE;
msg_len = 8;
} else {
brw_set_compression_control(p, BRW_COMPRESSION_NONE);
msg_control = BRW_DATAPORT_RENDER_TARGET_WRITE_SIMD8_SINGLE_SOURCE_SUBSPAN01;
msg_len = 4;
}
if (p->gen < 060) {
brw_push_insn_state(p);
brw_set_compression_control(p, BRW_COMPRESSION_NONE);
brw_set_mask_control(p, BRW_MASK_DISABLE);
brw_MOV(p, brw_message_reg(1), brw_vec8_grf(1, 0));
brw_pop_insn_state(p);
msg_len += 2;
}
/* The execution mask is ignored for render target writes. */
insn = brw_next_insn(p, BRW_OPCODE_SEND);
insn->header.predicate_control = 0;
insn->header.compression_control = BRW_COMPRESSION_NONE;
if (p->gen >= 060) {
msg_type = GEN6_DATAPORT_WRITE_MESSAGE_RENDER_TARGET_WRITE;
src0 = brw_message_reg(2);
header = false;
} else {
insn->header.destreg__conditionalmod = 0;
msg_type = BRW_DATAPORT_WRITE_MESSAGE_RENDER_TARGET_WRITE;
src0 = __retype_uw(brw_vec8_grf(0, 0));
header = true;
}
brw_set_dest(p, insn, null_result(dw));
brw_set_src0(p, insn, src0);
brw_set_dp_write_message(p, insn, 0,
msg_control, msg_type, msg_len,
header, true, 0, true, false);
}
void
vec4_generator::generate_pull_constant_load(vec4_instruction *inst,
struct brw_reg dst,
struct brw_reg index,
struct brw_reg offset)
{
assert(brw->gen <= 7);
assert(index.file == BRW_IMMEDIATE_VALUE &&
index.type == BRW_REGISTER_TYPE_UD);
uint32_t surf_index = index.dw1.ud;
struct brw_reg header = brw_vec8_grf(0, 0);
gen6_resolve_implied_move(p, &header, inst->base_mrf);
brw_MOV(p, retype(brw_message_reg(inst->base_mrf + 1), BRW_REGISTER_TYPE_D),
offset);
uint32_t msg_type;
if (brw->gen >= 6)
msg_type = GEN6_DATAPORT_READ_MESSAGE_OWORD_DUAL_BLOCK_READ;
else if (brw->gen == 5 || brw->is_g4x)
msg_type = G45_DATAPORT_READ_MESSAGE_OWORD_DUAL_BLOCK_READ;
else
msg_type = BRW_DATAPORT_READ_MESSAGE_OWORD_DUAL_BLOCK_READ;
/* Each of the 8 channel enables is considered for whether each
* dword is written.
*/
struct brw_instruction *send = brw_next_insn(p, BRW_OPCODE_SEND);
brw_set_dest(p, send, dst);
brw_set_src0(p, send, header);
if (brw->gen < 6)
send->header.destreg__conditionalmod = inst->base_mrf;
brw_set_dp_read_message(p, send,
surf_index,
BRW_DATAPORT_OWORD_DUAL_BLOCK_1OWORD,
msg_type,
BRW_DATAPORT_READ_TARGET_DATA_CACHE,
2, /* mlen */
true, /* header_present */
1 /* rlen */);
brw_mark_surface_used(&prog_data->base, surf_index);
}
/**
* Write block of 16 dwords/floats to the data port Render Cache scratch buffer.
* Scratch offset should be a multiple of 64.
* Used for register spilling.
*/
void brw_dp_WRITE_16( struct brw_compile *p,
struct brw_reg src,
GLuint scratch_offset )
{
GLuint msg_reg_nr = 1;
{
brw_push_insn_state(p);
brw_set_mask_control(p, BRW_MASK_DISABLE);
brw_set_compression_control(p, BRW_COMPRESSION_NONE);
/* set message header global offset field (reg 0, element 2) */
brw_MOV(p,
retype(brw_vec1_grf(0, 2), BRW_REGISTER_TYPE_D),
brw_imm_d(scratch_offset));
brw_pop_insn_state(p);
}
{
GLuint msg_length = 3;
struct brw_reg dest = retype(brw_null_reg(), BRW_REGISTER_TYPE_UW);
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__conditionalmod = msg_reg_nr;
brw_set_dest(insn, dest);
brw_set_src0(insn, src);
brw_set_dp_write_message(p->brw,
insn,
255, /* binding table index (255=stateless) */
BRW_DATAPORT_OWORD_BLOCK_4_OWORDS, /* msg_control */
BRW_DATAPORT_WRITE_MESSAGE_OWORD_BLOCK_WRITE, /* msg_type */
msg_length,
0, /* pixel scoreboard */
0, /* response_length */
0); /* eot */
}
}
struct brw_instruction *brw_ELSE(struct brw_compile *p,
struct brw_instruction *if_insn)
{
struct brw_instruction *insn;
GLuint br = 1;
if (BRW_IS_IGDNG(p->brw))
br = 2;
if (p->single_program_flow) {
insn = next_insn(p, BRW_OPCODE_ADD);
} else {
insn = next_insn(p, BRW_OPCODE_ELSE);
}
brw_set_dest(insn, brw_ip_reg());
brw_set_src0(insn, brw_ip_reg());
brw_set_src1(insn, brw_imm_d(0x0));
insn->header.compression_control = BRW_COMPRESSION_NONE;
insn->header.execution_size = if_insn->header.execution_size;
insn->header.mask_control = BRW_MASK_ENABLE;
if (!p->single_program_flow)
insn->header.thread_control = BRW_THREAD_SWITCH;
/* Patch the if instruction to point at this instruction.
*/
if (p->single_program_flow) {
assert(if_insn->header.opcode == BRW_OPCODE_ADD);
if_insn->bits3.ud = (insn - if_insn + 1) * 16;
} else {
assert(if_insn->header.opcode == BRW_OPCODE_IF);
if_insn->bits3.if_else.jump_count = br * (insn - if_insn);
if_insn->bits3.if_else.pop_count = 0;
if_insn->bits3.if_else.pad0 = 0;
}
return insn;
}
/**
* Read block of 16 dwords/floats from the data port Render Cache scratch buffer.
* Scratch offset should be a multiple of 64.
* Used for register spilling.
*/
void brw_dp_READ_16( struct brw_compile *p,
struct brw_reg dest,
GLuint scratch_offset )
{
GLuint msg_reg_nr = 1;
{
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_D),
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__conditionalmod = msg_reg_nr;
brw_set_dest(insn, dest); /* UW? */
brw_set_src0(insn, retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UW));
brw_set_dp_read_message(p->brw,
insn,
255, /* binding table index (255=stateless) */
3, /* msg_control (3 means 4 Owords) */
BRW_DATAPORT_READ_MESSAGE_OWORD_BLOCK_READ, /* msg_type */
1, /* target cache (render/scratch) */
1, /* msg_length */
2, /* response_length */
0); /* eot */
}
}
/* DO/WHILE loop:
*/
struct brw_instruction *brw_DO(struct brw_compile *p, GLuint execute_size)
{
if (p->single_program_flow) {
return &p->store[p->nr_insn];
} else {
struct brw_instruction *insn = next_insn(p, BRW_OPCODE_DO);
/* Override the defaults for this instruction:
*/
brw_set_dest(insn, brw_null_reg());
brw_set_src0(insn, brw_null_reg());
brw_set_src1(insn, brw_null_reg());
insn->header.compression_control = BRW_COMPRESSION_NONE;
insn->header.execution_size = execute_size;
insn->header.predicate_control = BRW_PREDICATE_NONE;
/* insn->header.mask_control = BRW_MASK_ENABLE; */
/* insn->header.mask_control = BRW_MASK_DISABLE; */
return insn;
}
}
void
vec4_generator::generate_scratch_read(vec4_instruction *inst,
struct brw_reg dst,
struct brw_reg index)
{
struct brw_reg header = brw_vec8_grf(0, 0);
gen6_resolve_implied_move(p, &header, inst->base_mrf);
generate_oword_dual_block_offsets(brw_message_reg(inst->base_mrf + 1),
index);
uint32_t msg_type;
if (brw->gen >= 6)
msg_type = GEN6_DATAPORT_READ_MESSAGE_OWORD_DUAL_BLOCK_READ;
else if (brw->gen == 5 || brw->is_g4x)
msg_type = G45_DATAPORT_READ_MESSAGE_OWORD_DUAL_BLOCK_READ;
else
msg_type = BRW_DATAPORT_READ_MESSAGE_OWORD_DUAL_BLOCK_READ;
/* Each of the 8 channel enables is considered for whether each
* dword is written.
*/
struct brw_instruction *send = brw_next_insn(p, BRW_OPCODE_SEND);
brw_set_dest(p, send, dst);
brw_set_src0(p, send, header);
if (brw->gen < 6)
send->header.destreg__conditionalmod = inst->base_mrf;
brw_set_dp_read_message(p, send,
255, /* binding table index: stateless access */
BRW_DATAPORT_OWORD_DUAL_BLOCK_1OWORD,
msg_type,
BRW_DATAPORT_READ_TARGET_RENDER_CACHE,
2, /* mlen */
true, /* header_present */
1 /* rlen */);
}
void
vec4_generator::generate_pull_constant_load_gen7(vec4_instruction *inst,
struct brw_reg dst,
struct brw_reg surf_index,
struct brw_reg offset)
{
assert(surf_index.file == BRW_IMMEDIATE_VALUE &&
surf_index.type == BRW_REGISTER_TYPE_UD);
brw_instruction *insn = brw_next_insn(p, BRW_OPCODE_SEND);
brw_set_dest(p, insn, dst);
brw_set_src0(p, insn, offset);
brw_set_sampler_message(p, insn,
surf_index.dw1.ud,
0, /* LD message ignores sampler unit */
GEN5_SAMPLER_MESSAGE_SAMPLE_LD,
1, /* rlen */
1, /* mlen */
false, /* no header */
BRW_SAMPLER_SIMD_MODE_SIMD4X2,
0);
brw_mark_surface_used(&prog_data->base, surf_index.dw1.ud);
}
void
vec4_generator::generate_scratch_write(vec4_instruction *inst,
struct brw_reg dst,
struct brw_reg src,
struct brw_reg index)
{
struct brw_reg header = brw_vec8_grf(0, 0);
bool write_commit;
/* If the instruction is predicated, we'll predicate the send, not
* the header setup.
*/
brw_set_predicate_control(p, false);
gen6_resolve_implied_move(p, &header, inst->base_mrf);
generate_oword_dual_block_offsets(brw_message_reg(inst->base_mrf + 1),
index);
brw_MOV(p,
retype(brw_message_reg(inst->base_mrf + 2), BRW_REGISTER_TYPE_D),
retype(src, BRW_REGISTER_TYPE_D));
uint32_t msg_type;
if (brw->gen >= 7)
msg_type = GEN7_DATAPORT_WRITE_MESSAGE_OWORD_DUAL_BLOCK_WRITE;
else if (brw->gen == 6)
msg_type = GEN6_DATAPORT_WRITE_MESSAGE_OWORD_DUAL_BLOCK_WRITE;
else
msg_type = BRW_DATAPORT_WRITE_MESSAGE_OWORD_DUAL_BLOCK_WRITE;
brw_set_predicate_control(p, inst->predicate);
/* Pre-gen6, we have to specify write commits to ensure ordering
* between reads and writes within a thread. Afterwards, that's
* guaranteed and write commits only matter for inter-thread
* synchronization.
*/
if (brw->gen >= 6) {
write_commit = false;
} else {
/* The visitor set up our destination register to be g0. This
* means that when the next read comes along, we will end up
* reading from g0 and causing a block on the write commit. For
* write-after-read, we are relying on the value of the previous
* read being used (and thus blocking on completion) before our
* write is executed. This means we have to be careful in
* instruction scheduling to not violate this assumption.
*/
write_commit = true;
}
/* Each of the 8 channel enables is considered for whether each
* dword is written.
*/
struct brw_instruction *send = brw_next_insn(p, BRW_OPCODE_SEND);
brw_set_dest(p, send, dst);
brw_set_src0(p, send, header);
if (brw->gen < 6)
send->header.destreg__conditionalmod = inst->base_mrf;
brw_set_dp_write_message(p, send,
255, /* binding table index: stateless access */
BRW_DATAPORT_OWORD_DUAL_BLOCK_1OWORD,
msg_type,
3, /* mlen */
true, /* header present */
false, /* not a render target write */
write_commit, /* rlen */
false, /* eot */
write_commit);
}
void
vec4_generator::generate_pull_constant_load_gen7(vec4_instruction *inst,
struct brw_reg dst,
struct brw_reg surf_index,
struct brw_reg offset)
{
assert(surf_index.type == BRW_REGISTER_TYPE_UD);
if (surf_index.file == BRW_IMMEDIATE_VALUE) {
brw_inst *insn = brw_next_insn(p, BRW_OPCODE_SEND);
brw_set_dest(p, insn, dst);
brw_set_src0(p, insn, offset);
brw_set_sampler_message(p, insn,
surf_index.dw1.ud,
0, /* LD message ignores sampler unit */
GEN5_SAMPLER_MESSAGE_SAMPLE_LD,
1, /* rlen */
1, /* mlen */
false, /* no header */
BRW_SAMPLER_SIMD_MODE_SIMD4X2,
0);
brw_mark_surface_used(&prog_data->base, surf_index.dw1.ud);
} else {
struct brw_reg addr = vec1(retype(brw_address_reg(0), BRW_REGISTER_TYPE_UD));
brw_push_insn_state(p);
brw_set_default_mask_control(p, BRW_MASK_DISABLE);
brw_set_default_access_mode(p, BRW_ALIGN_1);
/* a0.0 = surf_index & 0xff */
brw_inst *insn_and = brw_next_insn(p, BRW_OPCODE_AND);
brw_inst_set_exec_size(p->brw, insn_and, BRW_EXECUTE_1);
brw_set_dest(p, insn_and, addr);
brw_set_src0(p, insn_and, vec1(retype(surf_index, BRW_REGISTER_TYPE_UD)));
brw_set_src1(p, insn_and, brw_imm_ud(0x0ff));
/* a0.0 |= <descriptor> */
brw_inst *insn_or = brw_next_insn(p, BRW_OPCODE_OR);
brw_set_sampler_message(p, insn_or,
0 /* surface */,
0 /* sampler */,
GEN5_SAMPLER_MESSAGE_SAMPLE_LD,
1 /* rlen */,
1 /* mlen */,
false /* header */,
BRW_SAMPLER_SIMD_MODE_SIMD4X2,
0);
brw_inst_set_exec_size(p->brw, insn_or, BRW_EXECUTE_1);
brw_inst_set_src1_reg_type(p->brw, insn_or, BRW_REGISTER_TYPE_UD);
brw_set_src0(p, insn_or, addr);
brw_set_dest(p, insn_or, addr);
/* dst = send(offset, a0.0) */
brw_inst *insn_send = brw_next_insn(p, BRW_OPCODE_SEND);
brw_set_dest(p, insn_send, dst);
brw_set_src0(p, insn_send, offset);
brw_set_indirect_send_descriptor(p, insn_send, BRW_SFID_SAMPLER, addr);
brw_pop_insn_state(p);
/* visitor knows more than we do about the surface limit required,
* so has already done marking.
*/
}
}
void
vec4_generator::generate_tex(vec4_instruction *inst,
struct brw_reg dst,
struct brw_reg src,
struct brw_reg sampler_index)
{
int msg_type = -1;
if (brw->gen >= 5) {
switch (inst->opcode) {
case SHADER_OPCODE_TEX:
case SHADER_OPCODE_TXL:
if (inst->shadow_compare) {
msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_LOD_COMPARE;
} else {
msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_LOD;
}
break;
case SHADER_OPCODE_TXD:
if (inst->shadow_compare) {
/* Gen7.5+. Otherwise, lowered by brw_lower_texture_gradients(). */
assert(brw->gen >= 8 || brw->is_haswell);
msg_type = HSW_SAMPLER_MESSAGE_SAMPLE_DERIV_COMPARE;
} else {
msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_DERIVS;
}
break;
case SHADER_OPCODE_TXF:
msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_LD;
break;
case SHADER_OPCODE_TXF_CMS:
if (brw->gen >= 7)
msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_LD2DMS;
else
msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_LD;
break;
case SHADER_OPCODE_TXF_MCS:
assert(brw->gen >= 7);
msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_LD_MCS;
break;
case SHADER_OPCODE_TXS:
msg_type = GEN5_SAMPLER_MESSAGE_SAMPLE_RESINFO;
break;
case SHADER_OPCODE_TG4:
if (inst->shadow_compare) {
msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_GATHER4_C;
} else {
msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_GATHER4;
}
break;
case SHADER_OPCODE_TG4_OFFSET:
if (inst->shadow_compare) {
msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_GATHER4_PO_C;
} else {
msg_type = GEN7_SAMPLER_MESSAGE_SAMPLE_GATHER4_PO;
}
break;
default:
unreachable("should not get here: invalid vec4 texture opcode");
}
} else {
switch (inst->opcode) {
case SHADER_OPCODE_TEX:
case SHADER_OPCODE_TXL:
if (inst->shadow_compare) {
msg_type = BRW_SAMPLER_MESSAGE_SIMD4X2_SAMPLE_LOD_COMPARE;
assert(inst->mlen == 3);
} else {
msg_type = BRW_SAMPLER_MESSAGE_SIMD4X2_SAMPLE_LOD;
assert(inst->mlen == 2);
}
break;
case SHADER_OPCODE_TXD:
/* There is no sample_d_c message; comparisons are done manually. */
msg_type = BRW_SAMPLER_MESSAGE_SIMD4X2_SAMPLE_GRADIENTS;
assert(inst->mlen == 4);
break;
case SHADER_OPCODE_TXF:
msg_type = BRW_SAMPLER_MESSAGE_SIMD4X2_LD;
assert(inst->mlen == 2);
break;
case SHADER_OPCODE_TXS:
msg_type = BRW_SAMPLER_MESSAGE_SIMD4X2_RESINFO;
assert(inst->mlen == 2);
break;
default:
unreachable("should not get here: invalid vec4 texture opcode");
}
}
assert(msg_type != -1);
assert(sampler_index.type == BRW_REGISTER_TYPE_UD);
/* Load the message header if present. If there's a texture offset, we need
* to set it up explicitly and load the offset bitfield. Otherwise, we can
* use an implied move from g0 to the first message register.
*/
if (inst->header_present) {
if (brw->gen < 6 && !inst->texture_offset) {
/* Set up an implied move from g0 to the MRF. */
src = brw_vec8_grf(0, 0);
} else {
struct brw_reg header =
retype(brw_message_reg(inst->base_mrf), BRW_REGISTER_TYPE_UD);
/* Explicitly set up the message header by copying g0 to the MRF. */
brw_push_insn_state(p);
brw_set_default_mask_control(p, BRW_MASK_DISABLE);
brw_MOV(p, header, retype(brw_vec8_grf(0, 0), BRW_REGISTER_TYPE_UD));
brw_set_default_access_mode(p, BRW_ALIGN_1);
if (inst->texture_offset) {
/* Set the texel offset bits in DWord 2. */
brw_MOV(p, get_element_ud(header, 2),
brw_imm_ud(inst->texture_offset));
}
brw_adjust_sampler_state_pointer(p, header, sampler_index, dst);
brw_pop_insn_state(p);
}
}
uint32_t return_format;
switch (dst.type) {
case BRW_REGISTER_TYPE_D:
return_format = BRW_SAMPLER_RETURN_FORMAT_SINT32;
break;
case BRW_REGISTER_TYPE_UD:
return_format = BRW_SAMPLER_RETURN_FORMAT_UINT32;
break;
default:
return_format = BRW_SAMPLER_RETURN_FORMAT_FLOAT32;
break;
}
uint32_t base_binding_table_index = (inst->opcode == SHADER_OPCODE_TG4 ||
inst->opcode == SHADER_OPCODE_TG4_OFFSET)
? prog_data->base.binding_table.gather_texture_start
: prog_data->base.binding_table.texture_start;
if (sampler_index.file == BRW_IMMEDIATE_VALUE) {
uint32_t sampler = sampler_index.dw1.ud;
brw_SAMPLE(p,
dst,
inst->base_mrf,
src,
sampler + base_binding_table_index,
sampler % 16,
msg_type,
1, /* response length */
inst->mlen,
inst->header_present,
BRW_SAMPLER_SIMD_MODE_SIMD4X2,
return_format);
brw_mark_surface_used(&prog_data->base, sampler + base_binding_table_index);
} else {
/* Non-constant sampler index. */
/* Note: this clobbers `dst` as a temporary before emitting the send */
struct brw_reg addr = vec1(retype(brw_address_reg(0), BRW_REGISTER_TYPE_UD));
struct brw_reg temp = vec1(retype(dst, BRW_REGISTER_TYPE_UD));
struct brw_reg sampler_reg = vec1(retype(sampler_index, BRW_REGISTER_TYPE_UD));
brw_push_insn_state(p);
brw_set_default_mask_control(p, BRW_MASK_DISABLE);
brw_set_default_access_mode(p, BRW_ALIGN_1);
/* Some care required: `sampler` and `temp` may alias:
* addr = sampler & 0xff
* temp = (sampler << 8) & 0xf00
* addr = addr | temp
*/
brw_ADD(p, addr, sampler_reg, brw_imm_ud(base_binding_table_index));
brw_SHL(p, temp, sampler_reg, brw_imm_ud(8u));
brw_AND(p, temp, temp, brw_imm_ud(0x0f00));
brw_AND(p, addr, addr, brw_imm_ud(0x0ff));
brw_OR(p, addr, addr, temp);
/* a0.0 |= <descriptor> */
brw_inst *insn_or = brw_next_insn(p, BRW_OPCODE_OR);
brw_set_sampler_message(p, insn_or,
0 /* surface */,
0 /* sampler */,
msg_type,
1 /* rlen */,
inst->mlen /* mlen */,
inst->header_present /* header */,
BRW_SAMPLER_SIMD_MODE_SIMD4X2,
return_format);
brw_inst_set_exec_size(p->brw, insn_or, BRW_EXECUTE_1);
brw_inst_set_src1_reg_type(p->brw, insn_or, BRW_REGISTER_TYPE_UD);
brw_set_src0(p, insn_or, addr);
brw_set_dest(p, insn_or, addr);
/* dst = send(offset, a0.0) */
brw_inst *insn_send = brw_next_insn(p, BRW_OPCODE_SEND);
brw_set_dest(p, insn_send, dst);
brw_set_src0(p, insn_send, src);
brw_set_indirect_send_descriptor(p, insn_send, BRW_SFID_SAMPLER, addr);
brw_pop_insn_state(p);
/* visitor knows more than we do about the surface limit required,
* so has already done marking.
*/
}
}
/**
* Read float[4] constant(s) from VS constant buffer.
* For relative addressing, two float[4] constants will be read into 'dest'.
* Otherwise, one float[4] constant will be read into the lower half of 'dest'.
*/
void brw_dp_READ_4_vs(struct brw_compile *p,
struct brw_reg dest,
GLuint oword,
GLboolean relAddr,
struct brw_reg addrReg,
GLuint location,
GLuint bind_table_index)
{
GLuint msg_reg_nr = 1;
assert(oword < 2);
/*
printf("vs const read msg, location %u, msg_reg_nr %d\n",
location, msg_reg_nr);
*/
/* Setup MRF[1] with location/offset into const buffer */
{
struct brw_reg b;
brw_push_insn_state(p);
brw_set_compression_control(p, BRW_COMPRESSION_NONE);
brw_set_mask_control(p, BRW_MASK_DISABLE);
brw_set_predicate_control(p, BRW_PREDICATE_NONE);
/*brw_set_access_mode(p, BRW_ALIGN_16);*/
/* XXX I think we're setting all the dwords of MRF[1] to 'location'.
* when the docs say only dword[2] should be set. Hmmm. But it works.
*/
b = brw_message_reg(msg_reg_nr);
b = retype(b, BRW_REGISTER_TYPE_UD);
/*b = get_element_ud(b, 2);*/
if (relAddr) {
brw_ADD(p, b, addrReg, brw_imm_ud(location));
}
else {
brw_MOV(p, b, brw_imm_ud(location));
}
brw_pop_insn_state(p);
}
{
struct brw_instruction *insn = next_insn(p, BRW_OPCODE_SEND);
insn->header.predicate_control = BRW_PREDICATE_NONE;
insn->header.compression_control = BRW_COMPRESSION_NONE;
insn->header.destreg__conditionalmod = msg_reg_nr;
insn->header.mask_control = BRW_MASK_DISABLE;
/*insn->header.access_mode = BRW_ALIGN_16;*/
brw_set_dest(insn, dest);
brw_set_src0(insn, brw_null_reg());
brw_set_dp_read_message(p->brw,
insn,
bind_table_index,
oword, /* 0 = lower Oword, 1 = upper Oword */
BRW_DATAPORT_READ_MESSAGE_OWORD_BLOCK_READ, /* msg_type */
0, /* source cache = data cache */
1, /* msg_length */
1, /* response_length (1 Oword) */
0); /* eot */
}
}
/**
* Texture sample instruction.
* Note: the msg_type plus msg_length values determine exactly what kind
* of sampling operation is performed. See volume 4, page 161 of docs.
*/
void brw_SAMPLE(struct brw_compile *p,
struct brw_reg dest,
GLuint msg_reg_nr,
struct brw_reg src0,
GLuint binding_table_index,
GLuint sampler,
GLuint writemask,
GLuint msg_type,
GLuint response_length,
GLuint msg_length,
GLboolean eot,
GLuint header_present,
GLuint simd_mode)
{
GLboolean need_stall = 0;
if (writemask == 0) {
/*_mesa_printf("%s: zero writemask??\n", __FUNCTION__); */
return;
}
/* Hardware doesn't do destination dependency checking on send
* instructions properly. Add a workaround which generates the
* dependency by other means. In practice it seems like this bug
* only crops up for texture samples, and only where registers are
* written by the send and then written again later without being
* read in between. Luckily for us, we already track that
* information and use it to modify the writemask for the
* instruction, so that is a guide for whether a workaround is
* needed.
*/
if (writemask != WRITEMASK_XYZW) {
GLuint dst_offset = 0;
GLuint i, newmask = 0, len = 0;
for (i = 0; i < 4; i++) {
if (writemask & (1<<i))
break;
dst_offset += 2;
}
for (; i < 4; i++) {
if (!(writemask & (1<<i)))
break;
newmask |= 1<<i;
len++;
}
if (newmask != writemask) {
need_stall = 1;
/* _mesa_printf("need stall %x %x\n", newmask , writemask); */
}
else {
struct brw_reg m1 = brw_message_reg(msg_reg_nr);
newmask = ~newmask & WRITEMASK_XYZW;
brw_push_insn_state(p);
brw_set_compression_control(p, BRW_COMPRESSION_NONE);
brw_set_mask_control(p, BRW_MASK_DISABLE);
brw_MOV(p, m1, brw_vec8_grf(0,0));
brw_MOV(p, get_element_ud(m1, 2), brw_imm_ud(newmask << 12));
brw_pop_insn_state(p);
src0 = retype(brw_null_reg(), BRW_REGISTER_TYPE_UW);
dest = offset(dest, dst_offset);
response_length = len * 2;
}
}
{
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__conditionalmod = msg_reg_nr;
brw_set_dest(insn, dest);
brw_set_src0(insn, src0);
brw_set_sampler_message(p->brw, insn,
binding_table_index,
sampler,
msg_type,
response_length,
msg_length,
eot,
header_present,
simd_mode);
}
if (need_stall) {
struct brw_reg reg = vec8(offset(dest, response_length-1));
/* mov (8) r9.0<1>:f r9.0<8;8,1>:f { Align1 }
*/
brw_push_insn_state(p);
brw_set_compression_control(p, BRW_COMPRESSION_NONE);
brw_MOV(p, reg, reg);
brw_pop_insn_state(p);
}
}
