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ir_to_mesa: Add support for the pow expression.

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Fixes glsl-algebraic-pow-two.
This commit is contained in:
Eric Anholt
2010-06-28 12:26:19 -07:00
parent cbe52c8012
commit 904b5bfe99
1 changed files with 39 additions and 9 deletions
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48
src/mesa/shader/ir_to_mesa.cpp
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@@ -167,6 +167,12 @@ public:
ir_to_mesa_dst_reg dst,
ir_to_mesa_src_reg src0);
void ir_to_mesa_emit_scalar_op2(ir_instruction *ir,
enum prog_opcode op,
ir_to_mesa_dst_reg dst,
ir_to_mesa_src_reg src0,
ir_to_mesa_src_reg src1);
void *mem_ctx;
};
@@ -309,10 +315,11 @@ ir_to_mesa_dst_reg_from_src(ir_to_mesa_src_reg reg)
* to produce dest channels.
*/
void
ir_to_mesa_visitor::ir_to_mesa_emit_scalar_op1(ir_instruction *ir,
ir_to_mesa_visitor::ir_to_mesa_emit_scalar_op2(ir_instruction *ir,
enum prog_opcode op,
ir_to_mesa_dst_reg dst,
ir_to_mesa_src_reg src0)
ir_to_mesa_src_reg orig_src0,
ir_to_mesa_src_reg orig_src1)
{
int i, j;
int done_mask = ~dst.writemask;
@@ -324,28 +331,48 @@ ir_to_mesa_visitor::ir_to_mesa_emit_scalar_op1(ir_instruction *ir,
for (i = 0; i < 4; i++) {
GLuint this_mask = (1 << i);
ir_to_mesa_instruction *inst;
ir_to_mesa_src_reg src = src0;
ir_to_mesa_src_reg src0 = orig_src0;
ir_to_mesa_src_reg src1 = orig_src1;
if (done_mask & this_mask)
continue;
GLuint src_swiz = GET_SWZ(src.swizzle, i);
GLuint src0_swiz = GET_SWZ(src0.swizzle, i);
GLuint src1_swiz = GET_SWZ(src1.swizzle, i);
for (j = i + 1; j < 4; j++) {
if (!(done_mask & (1 << j)) && GET_SWZ(src.swizzle, j) == src_swiz) {
if (!(done_mask & (1 << j)) &&
GET_SWZ(src0.swizzle, j) == src0_swiz &&
GET_SWZ(src1.swizzle, j) == src1_swiz) {
this_mask |= (1 << j);
}
}
src.swizzle = MAKE_SWIZZLE4(src_swiz, src_swiz,
src_swiz, src_swiz);
src0.swizzle = MAKE_SWIZZLE4(src0_swiz, src0_swiz,
src0_swiz, src0_swiz);
src1.swizzle = MAKE_SWIZZLE4(src1_swiz, src1_swiz,
src1_swiz, src1_swiz);
inst = ir_to_mesa_emit_op1(ir, op,
inst = ir_to_mesa_emit_op2(ir, op,
dst,
src);
src0,
src1);
inst->dst_reg.writemask = this_mask;
done_mask |= this_mask;
}
}
void
ir_to_mesa_visitor::ir_to_mesa_emit_scalar_op1(ir_instruction *ir,
enum prog_opcode op,
ir_to_mesa_dst_reg dst,
ir_to_mesa_src_reg src0)
{
ir_to_mesa_src_reg undef;
undef.swizzle = SWIZZLE_XXXX;
ir_to_mesa_emit_scalar_op2(ir, op, dst, src0, undef);
}
struct ir_to_mesa_src_reg
ir_to_mesa_visitor::src_reg_for_float(float val)
{
@@ -711,6 +738,9 @@ ir_to_mesa_visitor::visit(ir_expression *ir)
case ir_binop_max:
ir_to_mesa_emit_op2(ir, OPCODE_MAX, result_dst, op[0], op[1]);
break;
case ir_binop_pow:
ir_to_mesa_emit_scalar_op2(ir, OPCODE_POW, result_dst, op[0], op[1]);
break;
default:
ir_print_visitor v;
printf("Failed to get tree for expression:\n");