diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/glsl/lower_instructions.cpp | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/src/glsl/lower_instructions.cpp b/src/glsl/lower_instructions.cpp index 5c1d6aae8fb..8994aadf34f 100644 --- a/src/glsl/lower_instructions.cpp +++ b/src/glsl/lower_instructions.cpp @@ -115,6 +115,7 @@ */ #include "main/core.h" /* for M_LOG2E */ +#include "program/prog_instruction.h" /* for swizzle */ #include "glsl_types.h" #include "ir.h" #include "ir_builder.h" @@ -148,6 +149,8 @@ private: void carry_to_arith(ir_expression *); void borrow_to_arith(ir_expression *); void sat_to_clamp(ir_expression *); + void double_dot_to_fma(ir_expression *); + void double_lrp(ir_expression *); }; } /* anonymous namespace */ @@ -521,10 +524,72 @@ lower_instructions_visitor::sat_to_clamp(ir_expression *ir) this->progress = true; } +void +lower_instructions_visitor::double_dot_to_fma(ir_expression *ir) +{ + ir_variable *temp = new(ir) ir_variable(ir->operands[0]->type->get_base_type(), "dot_res", + ir_var_temporary); + this->base_ir->insert_before(temp); + + int nc = ir->operands[0]->type->components(); + for (int i = nc - 1; i >= 1; i--) { + ir_assignment *assig; + if (i == (nc - 1)) { + assig = assign(temp, mul(swizzle(ir->operands[0]->clone(ir, NULL), i, 1), + swizzle(ir->operands[1]->clone(ir, NULL), i, 1))); + } else { + assig = assign(temp, fma(swizzle(ir->operands[0]->clone(ir, NULL), i, 1), + swizzle(ir->operands[1]->clone(ir, NULL), i, 1), + temp)); + } + this->base_ir->insert_before(assig); + } + + ir->operation = ir_triop_fma; + ir->operands[0] = swizzle(ir->operands[0], 0, 1); + ir->operands[1] = swizzle(ir->operands[1], 0, 1); + ir->operands[2] = new(ir) ir_dereference_variable(temp); + + this->progress = true; + +} + +void +lower_instructions_visitor::double_lrp(ir_expression *ir) +{ + int swizval; + ir_rvalue *op0 = ir->operands[0], *op2 = ir->operands[2]; + ir_constant *one = new(ir) ir_constant(1.0, op2->type->vector_elements); + + switch (op2->type->vector_elements) { + case 1: + swizval = SWIZZLE_XXXX; + break; + default: + assert(op0->type->vector_elements == op2->type->vector_elements); + swizval = SWIZZLE_XYZW; + break; + } + + ir->operation = ir_triop_fma; + ir->operands[0] = swizzle(op2, swizval, op0->type->vector_elements); + ir->operands[2] = mul(sub(one, op2->clone(ir, NULL)), op0); + + this->progress = true; +} + ir_visitor_status lower_instructions_visitor::visit_leave(ir_expression *ir) { switch (ir->operation) { + case ir_binop_dot: + if (ir->operands[0]->type->is_double()) + double_dot_to_fma(ir); + break; + case ir_triop_lrp: + if (ir->operands[0]->type->is_double()) + double_lrp(ir); + break; case ir_binop_sub: if (lowering(SUB_TO_ADD_NEG)) sub_to_add_neg(ir); |