embedding assembler in Pharo method using NativeBoost
Hooray!
L
test code:
fr1 := GMPfrWrapper new. "create new GNU mpfr floating point number"
fr1 prim_mpfr_prec_roundWithPrecision:4096 withRounding: 0. "set to
4096 digits of precision"
fr1 set_d: 1. "set it to 1.0"
"perform 10,000,000 4096-digit additions fr1 := fr1 + fr1 in a loop"
[fr1 test:10000000.] timeToRun =>1971 ms
GMPfrWrapper>>test:cnt
"function prototype: mpfr_add (mpzf_t gmpf, mpf_t op1, mpf_t op2)"
<primitive: #primitiveNativeCall module: #NativeBoostPlugin>
^ NBFFICallout cdecl: #( void (mpfr_t gmpfr, ulong cnt))
emitCall: [:gen | | asm proxy smpfr scnt|
asm := gen asm.
proxy := gen proxy.
"reserve temps for parameters passed in from Smalltalk"
smpfr := gen reserveTemp.
scnt := gen reserveTemp.
"move parameters into temps"
asm
mov: asm ESP ptr to: asm EAX;
mov: asm EAX to: smpfr; "gmpfr -> smpfr"
mov: asm ESP ptr + 4 to: asm EAX;
mov: asm EAX to: scnt. "cnt -> scnt"
"setup loop compare and jmp or push ECX and pass
through to function call"
asm
mov: scnt to: asm ECX;
label: #top;
cmp: asm ECX with: 0;
jz: #bottom;
push: asm ECX.
"call function"
asm cdeclCall: [:call | | gmpfrAddFcnPtr | "handles stack
alignment"
"push function arguments (note, cdecl push order is from right
to left ) "
asm
push: smpfr;
push: smpfr;
push: smpfr.
"get a function address"
gmpfrAddFcnPtr := self nbGetSymbolAddress: 'mpfr_add'
module:self nbLibraryNameOrHandle.
"put a function address into EAX, and call function "
asm mov: gmpfrAddFcnPtr asUImm to: asm EAX.
asm call: asm EAX.
] alignment: gen stackAlignment .
"restore ECX and jump to top for test"
asm
pop: asm ECX;
dec: asm ECX;
jmp: #top.
asm label: #bottom.
]
--
Squeak from the very start (introduction to Squeak and Pharo Smalltalk for the
(almost) complete and compleate beginner).
https://www.youtube.com/playlist?list=PL6601A198DF14788D&feature=view_all
