Module: Mesa Branch: master Commit: 9bbfae62657f44251562174ac1f80b2e4278a52d URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=9bbfae62657f44251562174ac1f80b2e4278a52d
Author: Rob Clark <[email protected]> Date: Fri Feb 21 18:03:30 2014 -0500 freedreno/a3xx/compiler: collapse nop's with repeat Easier than making more extensive use of rpt, and the more compact shaders seem to bring some bit of performance boost. (Perhaps repeat flag benefits are more than just instruction cache, possibly it saves on instruction decode as well?) Signed-off-by: Rob Clark <[email protected]> --- src/gallium/drivers/freedreno/a3xx/ir3.h | 5 +++++ src/gallium/drivers/freedreno/a3xx/ir3_ra.c | 10 ++++++++++ 2 files changed, 15 insertions(+) diff --git a/src/gallium/drivers/freedreno/a3xx/ir3.h b/src/gallium/drivers/freedreno/a3xx/ir3.h index 9c57a65..894db17 100644 --- a/src/gallium/drivers/freedreno/a3xx/ir3.h +++ b/src/gallium/drivers/freedreno/a3xx/ir3.h @@ -312,6 +312,11 @@ static inline bool is_flow(struct ir3_instruction *instr) return (instr->category == 0); } +static inline bool is_nop(struct ir3_instruction *instr) +{ + return is_flow(instr) && (instr->opc == OPC_NOP); +} + static inline bool is_alu(struct ir3_instruction *instr) { return (1 <= instr->category) && (instr->category <= 3); diff --git a/src/gallium/drivers/freedreno/a3xx/ir3_ra.c b/src/gallium/drivers/freedreno/a3xx/ir3_ra.c index 5df57e7..06a86ff 100644 --- a/src/gallium/drivers/freedreno/a3xx/ir3_ra.c +++ b/src/gallium/drivers/freedreno/a3xx/ir3_ra.c @@ -542,6 +542,16 @@ static void legalize(struct ir3_ra_ctx *ctx, struct ir3_block *block) if ((shader->instrs_count == 0) && (n->category >= 5)) ir3_instr_create(block, 0, OPC_NOP); + if (is_nop(n) && shader->instrs_count) { + struct ir3_instruction *last = + shader->instrs[shader->instrs_count-1]; + if (is_nop(last) && (last->repeat < 5)) { + last->repeat++; + last->flags |= n->flags; + continue; + } + } + shader->instrs[shader->instrs_count++] = n; if (is_sfu(n)) _______________________________________________ mesa-commit mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/mesa-commit
