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i965/vec4: add helpers for conversions to/from doubles 

Use these helpers to implement d2f and f2d. We will reuse these helpers when
we implement things like d2i or i2d as well.

v2:
- Rename the helpers (Matt)

Reviewed-by: Matt Turner <mattst88@gmail.com>
This commit is contained in:
Iago Toral Quiroga 2016-06-29 13:07:35 +02:00 committed by Samuel Iglesias Gonsálvez
parent c722a8e61e
commit bfc1f0f017
2 changed files with 41 additions and 20 deletions
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5
src/mesa/drivers/dri/i965/brw_vec4.h
View File

@ -315,6 +315,11 @@ public:
bool optimize_predicate(nir_alu_instr *instr, enum brw_predicate *predicate);
void emit_conversion_from_double(dst_reg dst, src_reg src, bool saturate,
brw_reg_type single_type);
void emit_conversion_to_double(dst_reg dst, src_reg src, bool saturate,
brw_reg_type single_type);
virtual void emit_nir_code();
virtual void nir_setup_uniforms();
virtual void nir_setup_system_value_intrinsic(nir_intrinsic_instr *instr);

56
src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
View File

@ -1066,6 +1066,36 @@ emit_find_msb_using_lzd(const vec4_builder &bld,
inst->src[0].negate = true;
}
void
vec4_visitor::emit_conversion_from_double(dst_reg dst, src_reg src,
bool saturate,
brw_reg_type single_type)
{
dst_reg temp = dst_reg(this, glsl_type::dvec4_type);
emit(MOV(temp, src));
dst_reg temp2 = dst_reg(this, glsl_type::dvec4_type);
temp2 = retype(temp2, single_type);
emit(VEC4_OPCODE_FROM_DOUBLE, temp2, src_reg(temp))
->size_written = 2 * REG_SIZE;
vec4_instruction *inst = emit(MOV(dst, src_reg(temp2)));
inst->saturate = saturate;
}
void
vec4_visitor::emit_conversion_to_double(dst_reg dst, src_reg src,
bool saturate,
brw_reg_type single_type)
{
dst_reg tmp_dst = dst_reg(src_reg(this, glsl_type::dvec4_type));
src_reg tmp_src = retype(src_reg(this, glsl_type::vec4_type), single_type);
emit(MOV(dst_reg(tmp_src), retype(src, single_type)));
emit(VEC4_OPCODE_TO_DOUBLE, tmp_dst, tmp_src);
vec4_instruction *inst = emit(MOV(dst, src_reg(tmp_dst)));
inst->saturate = saturate;
}
void
vec4_visitor::nir_emit_alu(nir_alu_instr *instr)
{
@ -1110,29 +1140,15 @@ vec4_visitor::nir_emit_alu(nir_alu_instr *instr)
inst = emit(MOV(dst, op[0]));
break;
case nir_op_d2f: {
dst_reg temp = dst_reg(this, glsl_type::dvec4_type);
emit(MOV(temp, op[0]));
dst_reg temp2 = dst_reg(this, glsl_type::dvec4_type);
temp2 = retype(temp2, BRW_REGISTER_TYPE_F);
emit(VEC4_OPCODE_FROM_DOUBLE, temp2, src_reg(temp))
->size_written = 2 * REG_SIZE;
vec4_instruction *inst = emit(MOV(dst, src_reg(temp2)));
inst->saturate = instr->dest.saturate;
case nir_op_d2f:
emit_conversion_from_double(dst, op[0], instr->dest.saturate,
BRW_REGISTER_TYPE_F);
break;
}
case nir_op_f2d: {
dst_reg tmp_dst = dst_reg(src_reg(this, glsl_type::dvec4_type));
src_reg tmp_src = src_reg(this, glsl_type::vec4_type);
emit(MOV(dst_reg(tmp_src), retype(op[0], BRW_REGISTER_TYPE_F)));
emit(VEC4_OPCODE_TO_DOUBLE, tmp_dst, tmp_src);
vec4_instruction *inst = emit(MOV(dst, src_reg(tmp_dst)));
inst->saturate = instr->dest.saturate;
case nir_op_f2d:
emit_conversion_to_double(dst, op[0], instr->dest.saturate,
BRW_REGISTER_TYPE_F);
break;
}
case nir_op_iadd:
assert(nir_dest_bit_size(instr->dest.dest) < 64);