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i965/vs: Track the variable index of array accesses.

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This isn't used currently, as we lower all array accesses.
This commit is contained in:
Eric Anholt 2011-08-07 10:59:39 -07:00
parent 314c2574ff
commit 1ff4f11dd9
2 changed files with 16 additions and 4 deletions
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4
src/mesa/drivers/dri/i965/brw_vec4.h
View file

@ -169,6 +169,8 @@ public:
GLuint swizzle; /**< SWIZZLE_XYZW swizzles from Mesa. */
bool negate;
bool abs;
src_reg *reladdr;
};
class dst_reg : public reg
@ -219,6 +221,8 @@ public:
explicit dst_reg(src_reg reg);
int writemask; /**< Bitfield of WRITEMASK_[XYZW] */
src_reg *reladdr;
};
class vec4_instruction : public exec_node {

16
src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
View file

@ -37,6 +37,7 @@ src_reg::src_reg(dst_reg reg)
this->reg = reg.reg;
this->reg_offset = reg.reg_offset;
this->type = reg.type;
this->reladdr = reg.reladdr;
int swizzles[4];
int next_chan = 0;
@ -66,6 +67,7 @@ dst_reg::dst_reg(src_reg reg)
this->reg_offset = reg.reg_offset;
this->type = reg.type;
this->writemask = WRITEMASK_XYZW;
this->reladdr = reg.reladdr;
}
vec4_instruction *
@ -1186,7 +1188,6 @@ vec4_visitor::visit(ir_dereference_array *ir)
if (constant_index) {
src.reg_offset += constant_index->value.i[0] * element_size;
} else {
#if 0 /* Variable array index */
/* Variable index array dereference. It eats the "vec4" of the
* base of the array and an index that offsets the Mesa register
* index.
@ -1198,15 +1199,22 @@ vec4_visitor::visit(ir_dereference_array *ir)
if (element_size == 1) {
index_reg = this->result;
} else {
index_reg = src_reg(this, glsl_type::float_type);
index_reg = src_reg(this, glsl_type::int_type);
emit(BRW_OPCODE_MUL, dst_reg(index_reg),
this->result, src_reg_for_float(element_size));
this->result, src_reg(element_size));
}
if (src.reladdr) {
src_reg temp = src_reg(this, glsl_type::int_type);
emit(BRW_OPCODE_ADD, dst_reg(temp), *src.reladdr, index_reg);
index_reg = temp;
}
src.reladdr = ralloc(mem_ctx, src_reg);
memcpy(src.reladdr, &index_reg, sizeof(index_reg));
#endif
}
/* If the type is smaller than a vec4, replicate the last channel out. */