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Z*) speed optimizations

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FeralChild64 authored and FeralChild64 committed 2021-01-26 00:03:07 +01:00
1 parent 047e7dd56a
commit 2b7de74935
10 files changed
+337 -288
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src/zvm_m65/z80_instr_math_8bit.s
+8 -8
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@@ -60,14 +60,14 @@ Z80_common_INC:
and #(0xFF - Z80_SF - Z80_ZF - Z80_HF - Z80_VF - Z80_NF)
ora z80_ftable_INC, x
sta REG_F
rts
jmp ZVM_next
Z80_instr_34: ; INC (HL)
jsr (VEC_fetch_via_HL)
tax
inc
jsr ZVM_store_back
sta [PTR_DATA],z
bra Z80_common_INC
Z80_instr_DD_34: ; INC (IX+d)
@@ -75,7 +75,7 @@ Z80_instr_DD_34: ; INC (IX+d)
jsr (VEC_fetch_via_IX_d)
tax
inc
jsr ZVM_store_back
sta [PTR_DATA],z
bra Z80_common_INC
Z80_instr_FD_34: ; INC (IY+d)
@@ -83,7 +83,7 @@ Z80_instr_FD_34: ; INC (IY+d)
jsr (VEC_fetch_via_IY_d)
tax
inc
jsr ZVM_store_back
sta [PTR_DATA],z
bra Z80_common_INC
Z80_instr_05: ; DEC B
@@ -135,14 +135,14 @@ Z80_common_DEC:
and #(0xFF - Z80_SF - Z80_ZF - Z80_HF - Z80_VF - Z80_NF)
ora z80_ftable_DEC, x
sta REG_F
rts
jmp ZVM_next
Z80_instr_35: ; DEC (HL)
jsr (VEC_fetch_via_HL)
tax
dec
jsr ZVM_store_back
sta [PTR_DATA],z
bra Z80_common_DEC
Z80_instr_DD_35: ; DEC (IX+d)
@@ -150,7 +150,7 @@ Z80_instr_DD_35: ; DEC (IX+d)
jsr (VEC_fetch_via_IX_d)
tax
dec
jsr ZVM_store_back
sta [PTR_DATA],z
bra Z80_common_DEC
Z80_instr_FD_35: ; DEC (IY+d)
@@ -158,5 +158,5 @@ Z80_instr_FD_35: ; DEC (IY+d)
jsr (VEC_fetch_via_IY_d)
tax
dec
jsr ZVM_store_back
sta [PTR_DATA],z
bra Z80_common_DEC