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freedreno: a2xx: Implement DP2 instruction 

Use DOT2ADDv instruction with 0.0f constant add.

Signed-off-by: Wladimir J. van der Laan <laanwj@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Wladimir J. van der Laan 2017-08-08 15:06:21 +00:00
parent 79d6b194f2
commit e8e3aa68d6
1 changed files with 21 additions and 0 deletions
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21
src/gallium/drivers/freedreno/a2xx/fd2_compiler.c
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@ -987,6 +987,24 @@ translate_trig(struct fd2_compile_context *ctx,
add_src_reg(ctx, instr, &tmp_src);
}
static void
translate_dp2(struct fd2_compile_context *ctx,
struct tgsi_full_instruction *inst,
unsigned opc)
{
struct tgsi_src_register tmp_const;
struct ir2_instruction *instr;
/* DP2ADD c,a,b -> dot2(a,b) + c */
/* for c we use the constant 0.0 */
instr = ir2_instr_create_alu(next_exec_cf(ctx), DOT2ADDv, ~0);
get_immediate(ctx, &tmp_const, fui(0.0f));
add_dst_reg(ctx, instr, &inst->Dst[0].Register);
add_src_reg(ctx, instr, &tmp_const);
add_src_reg(ctx, instr, &inst->Src[0].Register);
add_src_reg(ctx, instr, &inst->Src[1].Register);
add_vector_clamp(inst, instr);
}
/*
* Main part of compiler/translator:
*/
@ -1054,6 +1072,9 @@ translate_instruction(struct fd2_compile_context *ctx,
instr = ir2_instr_create_alu(cf, ADDv, ~0);
add_regs_vector_2(ctx, inst, instr);
break;
case TGSI_OPCODE_DP2:
translate_dp2(ctx, inst, opc);
break;
case TGSI_OPCODE_DP3:
instr = ir2_instr_create_alu(cf, DOT3v, ~0);
add_regs_vector_2(ctx, inst, instr);