Просмотр исходного кода

i965: Add 'wait' instruction support

When EU executes 'wait' instruction, it stalls and sets notification
register state. Host can issue MMIO write to clear notification
register state to allow EU continue on executing again.

Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
tags/mesa-7.9-rc1
Zhenyu Wang 15 лет назад
Родитель
Сommit
20be3ff576
2 измененных файлов: 30 добавлений и 0 удалений
  1. 16
    0
      src/mesa/drivers/dri/i965/brw_eu.h
  2. 14
    0
      src/mesa/drivers/dri/i965/brw_eu_emit.c

+ 16
- 0
src/mesa/drivers/dri/i965/brw_eu.h Просмотреть файл

@@ -520,6 +520,20 @@ static INLINE struct brw_reg brw_acc_reg( void )
0);
}

static INLINE struct brw_reg brw_notification_1_reg(void)
{

return brw_reg(BRW_ARCHITECTURE_REGISTER_FILE,
BRW_ARF_NOTIFICATION_COUNT,
1,
BRW_REGISTER_TYPE_UD,
BRW_VERTICAL_STRIDE_0,
BRW_WIDTH_1,
BRW_HORIZONTAL_STRIDE_0,
BRW_SWIZZLE_XXXX,
WRITEMASK_X);
}


static INLINE struct brw_reg brw_flag_reg( void )
{
@@ -919,6 +933,8 @@ void brw_land_fwd_jump(struct brw_compile *p,

void brw_NOP(struct brw_compile *p);

void brw_WAIT(struct brw_compile *p);

/* Special case: there is never a destination, execution size will be
* taken from src0:
*/

+ 14
- 0
src/mesa/drivers/dri/i965/brw_eu_emit.c Просмотреть файл

@@ -906,6 +906,20 @@ void brw_CMP(struct brw_compile *p,
}
}

/* Issue 'wait' instruction for n1, host could program MMIO
to wake up thread. */
void brw_WAIT (struct brw_compile *p)
{
struct brw_instruction *insn = next_insn(p, BRW_OPCODE_WAIT);
struct brw_reg src = brw_notification_1_reg();

brw_set_dest(insn, src);
brw_set_src0(insn, src);
brw_set_src1(insn, brw_null_reg());
insn->header.execution_size = 0; /* must */
insn->header.predicate_control = 0;
insn->header.compression_control = 0;
}


/***********************************************************************

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