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authorMatt Turner <mattst88@gmail.com>2013-09-19 12:56:10 -0700
committerMatt Turner <mattst88@gmail.com>2013-10-07 10:41:16 -0700
commit499d7a7f6e47403a4a3da448eddaf15bdf56395c (patch)
tree2fa4bb92dd8d52622ead91fb7c2880c069cc7144 /src
parentae514416b20e0117d58822253069f594b4a3ee57 (diff)
glsl: Add ir_binop_carry and ir_binop_borrow.
Calculates the carry out of the addition of two values and the borrow from subtraction respectively. Will be used in uaddCarry() and usubBorrow() built-in implementations. Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Diffstat (limited to 'src')
-rw-r--r--src/glsl/ir.cpp4
-rw-r--r--src/glsl/ir.h15
-rw-r--r--src/glsl/ir_builder.cpp10
-rw-r--r--src/glsl/ir_builder.h2
-rw-r--r--src/glsl/ir_validate.cpp7
-rw-r--r--src/mesa/program/ir_to_mesa.cpp2
-rw-r--r--src/mesa/state_tracker/st_glsl_to_tgsi.cpp2
7 files changed, 42 insertions, 0 deletions
diff --git a/src/glsl/ir.cpp b/src/glsl/ir.cpp
index ae67d6bddec..149ddbd5342 100644
--- a/src/glsl/ir.cpp
+++ b/src/glsl/ir.cpp
@@ -398,6 +398,8 @@ ir_expression::ir_expression(int op, ir_rvalue *op0, ir_rvalue *op1)
this->type = glsl_type::uint_type;
break;
+ case ir_binop_carry:
+ case ir_binop_borrow:
case ir_binop_lshift:
case ir_binop_rshift:
case ir_binop_bfm:
@@ -528,6 +530,8 @@ static const char *const operator_strs[] = {
"-",
"*",
"/",
+ "carry",
+ "borrow",
"%",
"<",
">",
diff --git a/src/glsl/ir.h b/src/glsl/ir.h
index 1a4a3a2e36b..756ce9c7cd3 100644
--- a/src/glsl/ir.h
+++ b/src/glsl/ir.h
@@ -1095,6 +1095,21 @@ enum ir_expression_operation {
ir_binop_div,
/**
+ * Returns the carry resulting from the addition of the two arguments.
+ */
+ /*@{*/
+ ir_binop_carry,
+ /*@}*/
+
+ /**
+ * Returns the borrow resulting from the subtraction of the second argument
+ * from the first argument.
+ */
+ /*@{*/
+ ir_binop_borrow,
+ /*@}*/
+
+ /**
* Takes one of two combinations of arguments:
*
* - mod(vecN, vecN)
diff --git a/src/glsl/ir_builder.cpp b/src/glsl/ir_builder.cpp
index 98b43229508..b6ce889834c 100644
--- a/src/glsl/ir_builder.cpp
+++ b/src/glsl/ir_builder.cpp
@@ -221,6 +221,16 @@ ir_expression *div(operand a, operand b)
return expr(ir_binop_div, a, b);
}
+ir_expression *carry(operand a, operand b)
+{
+ return expr(ir_binop_carry, a, b);
+}
+
+ir_expression *borrow(operand a, operand b)
+{
+ return expr(ir_binop_borrow, a, b);
+}
+
ir_expression *round_even(operand a)
{
return expr(ir_unop_round_even, a);
diff --git a/src/glsl/ir_builder.h b/src/glsl/ir_builder.h
index 6a5f771193b..1345788ab13 100644
--- a/src/glsl/ir_builder.h
+++ b/src/glsl/ir_builder.h
@@ -134,6 +134,8 @@ ir_expression *add(operand a, operand b);
ir_expression *sub(operand a, operand b);
ir_expression *mul(operand a, operand b);
ir_expression *div(operand a, operand b);
+ir_expression *carry(operand a, operand b);
+ir_expression *borrow(operand a, operand b);
ir_expression *round_even(operand a);
ir_expression *dot(operand a, operand b);
ir_expression *dotlike(operand a, operand b);
diff --git a/src/glsl/ir_validate.cpp b/src/glsl/ir_validate.cpp
index 2c64f4e582a..38db8c20677 100644
--- a/src/glsl/ir_validate.cpp
+++ b/src/glsl/ir_validate.cpp
@@ -429,6 +429,13 @@ ir_validate::visit_leave(ir_expression *ir)
}
break;
+ case ir_binop_carry:
+ case ir_binop_borrow:
+ assert(ir->type == ir->operands[0]->type);
+ assert(ir->type == ir->operands[1]->type);
+ assert(ir->type->base_type == GLSL_TYPE_UINT);
+ break;
+
case ir_binop_less:
case ir_binop_greater:
case ir_binop_lequal:
diff --git a/src/mesa/program/ir_to_mesa.cpp b/src/mesa/program/ir_to_mesa.cpp
index 6b22b507415..2f87cfd65c4 100644
--- a/src/mesa/program/ir_to_mesa.cpp
+++ b/src/mesa/program/ir_to_mesa.cpp
@@ -1497,6 +1497,8 @@ ir_to_mesa_visitor::visit(ir_expression *ir)
case ir_quadop_bitfield_insert:
case ir_binop_ldexp:
case ir_triop_csel:
+ case ir_binop_carry:
+ case ir_binop_borrow:
assert(!"not supported");
break;
diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index f11305b590a..f33bea6eb02 100644
--- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -1978,6 +1978,8 @@ glsl_to_tgsi_visitor::visit(ir_expression *ir)
case ir_binop_vector_extract:
case ir_triop_vector_insert:
case ir_binop_ldexp:
+ case ir_binop_carry:
+ case ir_binop_borrow:
/* This operation is not supported, or should have already been handled.
*/
assert(!"Invalid ir opcode in glsl_to_tgsi_visitor::visit()");