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Implement bt[csr] for aarch64

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This commit is contained in:
Theodore Dubois 2019-01-13 17:29:52 -05:00
parent 888e07363b
commit f77de16ce0
1 changed files with 63 additions and 21 deletions
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84
jit/gadgets-aarch64/bits.S
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@ -185,32 +185,74 @@
.endr
.endr
.macro do_bt_w8
and _tmp, _tmp, 0x1f
lsr w8, w8, _tmp
and w8, w8, 1
strb w8, [_cpu, CPU_cf]
.macro do_bt_op op, arg, size, s
.ifc \op,bt
.ifnc \arg, w8
mov w8, \arg
.endif
and _tmp, _tmp, \size-1
lsr w8, w8, _tmp
and w8, w8, 1
strb w8, [_cpu, CPU_cf]
.else
mov w9, 1
and _tmp, _tmp, \size-1
lsl w9, w9, _tmp
tst \arg, w9
.ifc \op,btc
eor \arg, \arg, w9
.else N .ifc \op,bts
orr \arg, \arg, w9
.else N .ifc \op,btr
bic \arg, \arg, w9
.endif N .endif N .endif
cset w9, ne
strb w9, [_cpu, CPU_cf]
.endif
.endm
.gadget bt32_mem
bic w8, _tmp, 0x1f
add _addr, _addr, w8, lsr 3
read_prep 32, bt32_mem
ldr w8, [_xaddr]
do_bt_w8
gret 1
read_bullshit 32, bt32_mem
.macro do_bt op, size, s
.gadget \op\size\()_mem
bic w8, _tmp, 0x1f
add _addr, _addr, w8, lsr 3
# hell {{{
.ifin(\op, bt)
read_prep \size, \op\size\()_mem
.endifin
.ifin(\op, btc,bts,btr)
write_prep \size, \op\size\()_mem
.endifin
# }}}
ldr w8, [_xaddr]
do_bt_op \op, w8, \size, \s
.ifin(\op, btc,bts,btr)
write_done \size, \op\size\()_mem
.endifin
gret 1
# also hell {{{
.ifin(\op, bt)
read_bullshit \size, \op\size\()_mem
.endifin
.ifin(\op, btc,bts,btr)
write_bullshit \size, \op\size\()_mem
.endifin
# }}}
.macro x name reg
.gadget bt32_\name
mov w8, \reg
do_bt_w8
gret
.macro x name, reg
.gadget \op\size\()_\name
do_bt_op \op, \reg, \size, \s
gret
.endm
.each_reg x
.purgem x
.endm
.each_reg x
.purgem x
.gadget_array bt
.irp op, bt,btc,bts,btr
.irp size, 16,32
ss \size, do_bt, \op
.endr
.gadget_array \op
.endr
.macro x name reg
.gadget bswap_\name