diff options
| author | Eric Anholt <[email protected]> | 2014-12-16 11:58:58 -0800 |
|---|---|---|
| committer | Eric Anholt <[email protected]> | 2014-12-16 13:45:41 -0800 |
| commit | 1f0e1060503e9e700c22a07fa050c47ef5257a40 (patch) | |
| tree | 65cc0af21837c1bdd4be36d4c0dc0acae0a3ac87 | |
| parent | f96bd9673edd79e4304d8e60a4cb4a0119b12a28 (diff) | |
vc4: Add support for turning add-based MOVs to muls for pairing.
total instructions in shared programs: 43053 -> 40795 (-5.24%)
instructions in affected programs: 37996 -> 35738 (-5.94%)
| -rw-r--r-- | src/gallium/drivers/vc4/vc4_qpu.c | 51 |
1 files changed, 49 insertions, 2 deletions
diff --git a/src/gallium/drivers/vc4/vc4_qpu.c b/src/gallium/drivers/vc4/vc4_qpu.c index 0d9f5ec04ac..52c06ae5517 100644 --- a/src/gallium/drivers/vc4/vc4_qpu.c +++ b/src/gallium/drivers/vc4/vc4_qpu.c @@ -338,6 +338,46 @@ try_swap_ra_file(uint64_t *merge, uint64_t *a, uint64_t *b) return true; } +static bool +convert_mov(uint64_t *inst) +{ + uint32_t add_a = QPU_GET_FIELD(*inst, QPU_ADD_A); + uint32_t waddr_add = QPU_GET_FIELD(*inst, QPU_WADDR_ADD); + uint32_t cond_add = QPU_GET_FIELD(*inst, QPU_COND_ADD); + + /* Is it a MOV? */ + if (QPU_GET_FIELD(*inst, QPU_OP_ADD) != QPU_A_OR || + (add_a != QPU_GET_FIELD(*inst, QPU_ADD_B))) { + return false; + } + + if (QPU_GET_FIELD(*inst, QPU_SIG) != QPU_SIG_NONE) + return false; + + /* We could maybe support this in the .8888 and .8a-.8d cases. */ + if (*inst & QPU_PM) + return false; + + *inst = QPU_UPDATE_FIELD(*inst, QPU_A_NOP, QPU_OP_ADD); + *inst = QPU_UPDATE_FIELD(*inst, QPU_M_V8MIN, QPU_OP_MUL); + + *inst = QPU_UPDATE_FIELD(*inst, add_a, QPU_MUL_A); + *inst = QPU_UPDATE_FIELD(*inst, add_a, QPU_MUL_B); + *inst = QPU_UPDATE_FIELD(*inst, QPU_MUX_R0, QPU_ADD_A); + *inst = QPU_UPDATE_FIELD(*inst, QPU_MUX_R0, QPU_ADD_B); + + *inst = QPU_UPDATE_FIELD(*inst, waddr_add, QPU_WADDR_MUL); + *inst = QPU_UPDATE_FIELD(*inst, QPU_W_NOP, QPU_WADDR_ADD); + + *inst = QPU_UPDATE_FIELD(*inst, cond_add, QPU_COND_MUL); + *inst = QPU_UPDATE_FIELD(*inst, QPU_COND_NEVER, QPU_COND_ADD); + + if (!qpu_waddr_ignores_ws(waddr_add)) + *inst ^= QPU_WS; + + return true; +} + uint64_t qpu_merge_inst(uint64_t a, uint64_t b) { @@ -345,8 +385,15 @@ qpu_merge_inst(uint64_t a, uint64_t b) bool ok = true; if (QPU_GET_FIELD(a, QPU_OP_ADD) != QPU_A_NOP && - QPU_GET_FIELD(b, QPU_OP_ADD) != QPU_A_NOP) - return 0; + QPU_GET_FIELD(b, QPU_OP_ADD) != QPU_A_NOP) { + if (QPU_GET_FIELD(a, QPU_OP_MUL) != QPU_M_NOP || + QPU_GET_FIELD(b, QPU_OP_MUL) != QPU_M_NOP || + !(convert_mov(&a) || convert_mov(&b))) { + return 0; + } else { + merge = a | b; + } + } if (QPU_GET_FIELD(a, QPU_OP_MUL) != QPU_M_NOP && QPU_GET_FIELD(b, QPU_OP_MUL) != QPU_M_NOP) |