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r300: merge MOVs into ADD using the 0 swizzle

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Shader-db stats with RV530:
total instructions in shared programs: 169509 -> 166013 (-2.06%)
instructions in affected programs: 99126 -> 95630 (-3.53%)
total presub in shared programs: 10975 -> 10758 (-1.98%)
presub in affected programs: 744 -> 527 (-29.17%)
total temps in shared programs: 21722 -> 21649 (-0.34%)
temps in affected programs: 1350 -> 1277 (-5.41%)

Signed-off-by: Pavel Ondračka <pavel.ondracka@gmail.com>
Reviewed-by: Filip Gawin <filip@gawin.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17560>
This commit is contained in:
Pavel Ondračka 2022-07-12 16:04:22 +02:00
parent 13607d8c48
commit 275beae42d
1 changed files with 36 additions and 7 deletions
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43
src/gallium/drivers/r300/compiler/radeon_optimize.c
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@ -959,14 +959,43 @@ static bool merge_movs(
src.Swizzle = merge_swizzles(cur->U.I.SrcReg[0].Swizzle,
inst->U.I.SrcReg[0].Swizzle);
src.Negate = merge_negates(inst->U.I.SrcReg[0], cur->U.I.SrcReg[0]);
if (!c->SwizzleCaps->IsNative(RC_OPCODE_MOV, src))
return false;
cur->U.I.DstReg.WriteMask |= orig_dst_wmask;
cur->U.I.SrcReg[0] = src;
rc_remove_instruction(inst);
return true;
if (c->SwizzleCaps->IsNative(RC_OPCODE_MOV, src)) {
cur->U.I.DstReg.WriteMask |= orig_dst_wmask;
cur->U.I.SrcReg[0] = src;
rc_remove_instruction(inst);
return true;
}
}
return false;
/* Otherwise, we can convert the MOVs into ADD.
*
* For example
* MOV temp[0].x const[0].x
* MOV temp[0].y input[0].y
*
* becomes
* ADD temp[0].xy const[0].x0 input[0].0y
*/
unsigned wmask = cur->U.I.DstReg.WriteMask | orig_dst_wmask;
struct rc_src_register src0 = inst->U.I.SrcReg[0];
struct rc_src_register src1 = cur->U.I.SrcReg[0];
src0.Swizzle = fill_swizzle(src0.Swizzle,
wmask, RC_SWIZZLE_ZERO);
src1.Swizzle = fill_swizzle(src1.Swizzle,
wmask, RC_SWIZZLE_ZERO);
if (!c->SwizzleCaps->IsNative(RC_OPCODE_ADD, src0) ||
!c->SwizzleCaps->IsNative(RC_OPCODE_ADD, src1))
return false;
cur->U.I.DstReg.WriteMask = wmask;
cur->U.I.Opcode = RC_OPCODE_ADD;
cur->U.I.SrcReg[0] = src0;
cur->U.I.SrcReg[1] = src1;
/* finally delete the original mov */
rc_remove_instruction(inst);
return true;
}
static bool inst_combination(