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i965: Implement 16-wide math on G45 and Ironlake. 

[chrisf:]
Improves performance in CS:S video stress test by about 2%.
No piglit regressions on Ironlake.

Reviewed-by: Chris Forbes <chrisf@ijw.co.nz>
This commit is contained in:
Kenneth Graunke 2013-03-30 00:15:54 -07:00 committed by Chris Forbes
parent fcaa48d9cc
commit 1b77d2133c
2 changed files with 28 additions and 0 deletions
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3
src/mesa/drivers/dri/i965/brw_fs.h
View File

@ -525,6 +525,9 @@ private:
void generate_math_gen4(fs_inst *inst,
struct brw_reg dst,
struct brw_reg src);
void generate_math_g45(fs_inst *inst,
struct brw_reg dst,
struct brw_reg src);
void generate_ddx(fs_inst *inst, struct brw_reg dst, struct brw_reg src);
void generate_ddy(fs_inst *inst, struct brw_reg dst, struct brw_reg src,
bool negate_value);

25
src/mesa/drivers/dri/i965/brw_fs_emit.cpp
View File

@ -331,6 +331,29 @@ fs_generator::generate_math_gen4(fs_inst *inst,
}
}
void
fs_generator::generate_math_g45(fs_inst *inst,
struct brw_reg dst,
struct brw_reg src)
{
if (inst->opcode == SHADER_OPCODE_POW ||
inst->opcode == SHADER_OPCODE_INT_QUOTIENT ||
inst->opcode == SHADER_OPCODE_INT_REMAINDER) {
generate_math_gen4(inst, dst, src);
return;
}
int op = brw_math_function(inst->opcode);
assert(inst->mlen >= 1);
brw_math(p, dst,
op,
inst->base_mrf, src,
BRW_MATH_DATA_VECTOR,
BRW_MATH_PRECISION_FULL);
}
void
fs_generator::generate_tex(fs_inst *inst, struct brw_reg dst, struct brw_reg src)
{
@ -1307,6 +1330,8 @@ fs_generator::generate_code(exec_list *instructions)
generate_math1_gen7(inst, dst, src[0]);
} else if (intel->gen == 6) {
generate_math1_gen6(inst, dst, src[0]);
} else if (intel->gen == 5 || intel->is_g4x) {
generate_math_g45(inst, dst, src[0]);
} else {
generate_math_gen4(inst, dst, src[0]);
}