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| author | florian <florian@3ad0048d-3df7-0310-abae-a5850022a9f2> | 2018-03-10 21:53:45 +0000 |
|---|---|---|
| committer | florian <florian@3ad0048d-3df7-0310-abae-a5850022a9f2> | 2018-03-10 21:53:45 +0000 |
| commit | 2dc54b83c90db5dae52550ebb6692e005c4a9baf (patch) | |
| tree | 01b0009860a92627c69a1daac47d888f1ba1b835 /compiler/avr/aoptcpu.pas | |
| parent | bb19d554129044013dc811e2ab843f686556da01 (diff) | |
| download | fpc-2dc54b83c90db5dae52550ebb6692e005c4a9baf.tar.gz | |
* improved OpCp2Op
git-svn-id: https://svn.freepascal.org/svn/fpc/trunk@38486 3ad0048d-3df7-0310-abae-a5850022a9f2
Diffstat (limited to 'compiler/avr/aoptcpu.pas')
| -rw-r--r-- | compiler/avr/aoptcpu.pas | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/compiler/avr/aoptcpu.pas b/compiler/avr/aoptcpu.pas index a0539f2d97..7440d5aa20 100644 --- a/compiler/avr/aoptcpu.pas +++ b/compiler/avr/aoptcpu.pas @@ -251,7 +251,7 @@ Implementation (taicpu(hp1).oper[0]^.reg = NR_R1) and (taicpu(p).opcode in [A_ADC,A_ADD,A_AND,A_ANDI,A_ASR,A_COM,A_EOR, A_LSL,A_LSR, - A_OR,A_ORI,A_ROL,A_ROR])))) or + A_OR,A_ORI,A_ROL,A_ROR,A_SUB,A_SBI])))) or (MatchInstruction(hp1, A_CPI) and (taicpu(p).opcode = A_ANDI) and (taicpu(p).oper[1]^.typ=top_const) and @@ -266,7 +266,9 @@ Implementation EQ = Z=1; NE = Z=0; MI = N=1; PL = N=0; } MatchInstruction(hp2, A_BRxx) and - (taicpu(hp2).condition in [C_EQ,C_NE,C_MI,C_PL]) { and + ((taicpu(hp2).condition in [C_EQ,C_NE,C_MI,C_PL]) or + { sub/sbc set all flags } + (taicpu(p).opcode in [A_SUB,A_SBI])){ and no flag allocation tracking implemented yet on avr assigned(FindRegDealloc(NR_DEFAULTFLAGS,tai(hp2.Next)))} then begin @@ -282,7 +284,9 @@ Implementation } // If we compare to the same value we are masking then invert the comparison - if (taicpu(hp1).opcode=A_CPI) then + if (taicpu(hp1).opcode=A_CPI) or + { sub/sbc with reverted? } + ((taicpu(hp1).oper[0]^.reg = NR_R1) and (taicpu(p).opcode in [A_SUB,A_SBI])) then taicpu(hp2).condition:=inverse_cond(taicpu(hp2).condition); asml.InsertBefore(tai_regalloc.alloc(NR_DEFAULTFLAGS,p), p); |