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i965: Define helper function to copy an arbitrary live component from some register.

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Reviewed-by: Matt Turner <mattst88@gmail.com>
This commit is contained in:
Francisco Jerez 2015-03-20 14:16:09 +02:00
parent 3da9f708d4
commit 046abc998c
4 changed files with 28 additions and 0 deletions
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2
src/mesa/drivers/dri/i965/brw_fs.h
View file

@ -325,6 +325,8 @@ public:
void emit_minmax(enum brw_conditional_mod conditionalmod, const fs_reg &dst,
const fs_reg &src0, const fs_reg &src1);
void emit_discard_jump();
/** Copy any live channel from \p src to the first channel of \p dst. */
void emit_uniformize(const fs_reg &dst, const fs_reg &src);
bool try_emit_b2f_of_comparison(ir_expression *ir);
bool try_emit_saturate(ir_expression *ir);
bool try_emit_line(ir_expression *ir);

12
src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
View file

@ -335,6 +335,18 @@ fs_visitor::emit_minmax(enum brw_conditional_mod conditionalmod, const fs_reg &d
}
}
void
fs_visitor::emit_uniformize(const fs_reg &dst, const fs_reg &src)
{
const fs_reg chan_index = vgrf(glsl_type::uint_type);
emit(SHADER_OPCODE_FIND_LIVE_CHANNEL, component(chan_index, 0))
->force_writemask_all = true;
emit(SHADER_OPCODE_BROADCAST, component(dst, 0),
src, component(chan_index, 0))
->force_writemask_all = true;
}
bool
fs_visitor::try_emit_saturate(ir_expression *ir)
{

3
src/mesa/drivers/dri/i965/brw_vec4.h
View file

@ -299,6 +299,9 @@ public:
void emit_lrp(const dst_reg &dst,
const src_reg &x, const src_reg &y, const src_reg &a);
/** Copy any live channel from \p src to the first channel of \p dst. */
void emit_uniformize(const dst_reg &dst, const src_reg &src);
void emit_block_move(dst_reg *dst, src_reg *src,
const struct glsl_type *type, brw_predicate predicate);

11
src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
View file

@ -1373,6 +1373,17 @@ vec4_visitor::emit_pull_constant_load_reg(dst_reg dst,
emit(pull);
}
void
vec4_visitor::emit_uniformize(const dst_reg &dst, const src_reg &src)
{
const src_reg chan_index(this, glsl_type::uint_type);
emit(SHADER_OPCODE_FIND_LIVE_CHANNEL, dst_reg(chan_index))
->force_writemask_all = true;
emit(SHADER_OPCODE_BROADCAST, dst, src, chan_index)
->force_writemask_all = true;
}
void
vec4_visitor::visit(ir_expression *ir)
{