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@@ -2735,14 +2735,14 @@ unit cgx86;
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helpsize:=2*sizeof(aword);
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{$ifndef i8086}
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{ avx helps only to reduce size, using it in general does at least not help on
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- an i7-4770 (FK) }
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+ an i7-4770
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+ but using the xmm registers reduces register pressure(FK) }
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if (FPUX86_HAS_AVXUNIT in fpu_capabilities[current_settings.fputype]) and
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- // (cs_opt_size in current_settings.optimizerswitches) and
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- ({$ifdef i386}(len=8) or{$endif i386}(len=16) or (len=24) or (len=32) { or (len=40) or (len=48)}) then
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+ ({$ifdef i386}(len=8) or{$endif i386}(len=16) or (len=24) or (len=32) or (len=40) or (len=48)) then
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cm:=copy_avx
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else
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-{$ifdef dummy}
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- { I'am not sure what CPUs would benefit from using sse instructions for moves (FK) }
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+ { I'am not sure what CPUs would benefit from using sse instructions for moves
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+ but using the xmm registers reduces register pressure (FK) }
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if
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{$ifdef x86_64}
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((current_settings.fputype>=fpu_sse64)
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@@ -2750,17 +2750,17 @@ unit cgx86;
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((current_settings.fputype>=fpu_sse)
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{$endif x86_64}
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or (CPUX86_HAS_SSE2 in cpu_capabilities[current_settings.cputype])) and
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- ((len=8) or (len=16) or (len=24) or (len=32) or (len=40) or (len=48)) then
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+ ({$ifdef i386}(len=8) or {$endif i386}(len=16) or (len=24) or (len=32) or (len=40) or (len=48)) then
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cm:=copy_mm
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else
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-{$endif dummy}
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{$endif i8086}
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if (cs_mmx in current_settings.localswitches) and
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not(pi_uses_fpu in current_procinfo.flags) and
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((len=8) or (len=16) or (len=24) or (len=32)) then
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- cm:=copy_mmx;
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- if (len>helpsize) then
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- cm:=copy_string;
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+ cm:=copy_mmx
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+ else
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+ if len>helpsize then
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+ cm:=copy_string;
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if (cs_opt_size in current_settings.optimizerswitches) and
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not((len<=16) and (cm in [copy_mmx,copy_mm,copy_avx])) and
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not(len in copy_len_sizes) then
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florian