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vm-x86.c
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vm-x86.c
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/**\file vm-x86.c
the x86 and x86_64 jit.
\see core/vm.c and INTERNALS.md
(c) 2008 why the lucky stiff, the freelance professor
(c) 2013 perl11 org
*/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "p2.h"
#include "internal.h"
#include "opcodes.h"
#include "asm.h"
#include "khash.h"
#include "table.h"
#define RBP(x) (0x100 - ((x + 1) * sizeof(PN)))
#define RBPI(x) (0x100 - ((x + 1) * sizeof(int)))
#if __WORDSIZE != 64
#define X86_PRE_T 0
#define X86_PRE()
#define X86_POST()
#define X86C(op32, op64) op32
#else
#define X86_PRE_T 1
#define X86_PRE() ASM(0x48)
#define X86_POST() ASM(0x48); ASM(0x98)
#define X86C(op32, op64) op64
#endif
#define X86_MOV_RBP(reg, x) \
X86_PRE(); ASM(reg); ASM(0x45); ASM(RBP(x))
#if __WORDSIZE != 64
# define X86_MOVQ(reg, x) \
ASM(0xC7); /* movl */ \
ASM(0x45); ASM(RBP(reg)); /* -A(%rbp) */ \
ASMI((PN)(x))
#else
# define X86_MOVQ(reg, x) \
X86_PRE(); ASM(0xb8); ASMN((PN)(x)); /* movq x, %rax */ \
X86_PRE(); ASM(0x89); /* movq */ \
ASM(0x45); ASM(RBP(reg)); /* %rax, -A(%rbp) */
#endif
#define X86_MATH(two, func, ops) ({ \
int asmpos = 0; \
X86_MOV_RBP(0x8B, op.a); /* mov -A(%rbp) %eax */ \
if (two) { X86_PRE(); ASM(0x8B); ASM(0x55); ASM(RBP(op.b)); } /* mov -B(%rbp) %edx */ \
ASM(0xF6); ASM(0xC0); ASM(0x01); /* test 0x1 %al */ \
asmpos = (*asmp)->len; \
ASM(0x74); ASM(0); /* je [a] */ \
if (two) { ASM(0xF6); ASM(0xC2); ASM(0x01); /* test 0x1 %dl */ } \
if (two) { ASM(0x74); ASM(0); /* je [a] */ } \
ops; /* add, sub, ... */ \
(*asmp)->ptr[asmpos + 1] = ((*asmp)->len - asmpos); \
if (two) { (*asmp)->ptr[asmpos + 6] = ((*asmp)->len - asmpos) - 5; } \
asmpos = (*asmp)->len; \
ASM(0xEB); ASM(0); /* jmp [b] */ \
X86_ARGO(start - 3, 0); /* [a]: mov &P 0(%esp) */ \
X86_ARGO(op.a, 1); /* mov &CL 1(%esp) */ \
X86_ARGO(op.b, 2); /* mov B 2(%esp) */ \
X86_PRE(); ASM(0xB8); ASMN(func); /* mov &func %rax */ \
ASM(0xFF); ASM(0xD0); /* callq %rax */ \
(*asmp)->ptr[asmpos + 1] = ((*asmp)->len - asmpos) - 2; \
X86_MOV_RBP(0x89, op.a); /* mov -B(%rbp) %eax */ \
})
#define X86_CMP(ops) \
X86_PRE(); ASM(0x8B); ASM(0x55); ASM(RBP(op.a));/* mov -A(%rbp) %edx */ \
X86_MOV_RBP(0x8B, op.b); /* mov -B(%rbp) %eax */ \
X86_PRE(); ASM(0x39); ASM(0xC2); /* cmp %rax %rdx */ \
ASM(ops); ASM(X86C(9, 16)); /* jle +10 */ \
X86_MOVQ(op.a, PN_TRUE); /* -A(%rbp) = TRUE */ \
ASM(0xEB); ASM(X86C(7, 14)); /* jmp +7 */ \
X86_MOVQ(op.a, PN_FALSE) /* -A(%rbp) = FALSE */
#define X86_ARGO(regn, argn) potion_x86_c_arg(P, asmp, 1, regn, argn)
#define X86_ARGO_IMM(regn, argn) potion_x86_c_arg(P, asmp, 2, regn, argn)
#define X86_ARGI(regn, argn) potion_x86_c_arg(P, asmp, 0, regn, argn)
#define TAG_JMP(jpos) \
ASM(0xE9); \
if ((int)jpos >= (int)pos) { \
jmps[*jmpc].from = asmp[0]->len; \
ASMI(0); \
jmps[*jmpc].to = jpos + 1; \
*jmpc = *jmpc + 1; \
} else if ((int)jpos < (int)pos) { \
ASMI(offs[jpos + 1] - ((asmp[0]->len) + 4)); \
} else { \
ASMI(0); \
}
#define X86_DEBUG() \
X86_PRE(); ASM(0xB8); ASMN(potion_x86_debug); \
ASM(0xFF); ASM(0xD0)
// TODO: finish jit backtraces using this
void potion_x86_debug() {
Potion *P;
int n = 0;
_PN rax, *rbp, *sp;
#if POTION_X86 == POTION_JIT_TARGET
#if __WORDSIZE != 64
__asm__ ("mov %%eax, %0;"
#else
__asm__ ("mov %%rax, %0;"
#endif
:"=r"(rax)
);
printf("RAX = %lx (%u)\n", rax, potion_type(rax));
#if __WORDSIZE != 64
__asm__ ("mov %%ebp, %0;"
#else
__asm__ ("mov %%rbp, %0;"
#endif
:"=r"(sp)
);
#endif
P = (Potion *)sp[2];
printf("Potion: %p (%p)\n", P, &P);
again:
n = 0;
rbp = (unsigned long *)*sp;
if (rbp > sp - 2 && sp[2] == (PN)P) {
printf("RBP = %lx (%lx), SP = %lx\n", (PN)rbp, *rbp, (PN)sp);
while (sp < rbp) {
printf("STACK[%d] = %lx\n", n++, *sp);
sp++;
}
goto again;
}
}
/** mimick c calling convention
\see http://en.wikipedia.org/wiki/X86_calling_conventions
\param asmp: jit buffer
\param out: 1 out-param only, 2 out+immediate, 0 in-param also
\param regn: value (usually indirect stack ptr, relative to ebp)
\param argn: argument index (0-5 in regs on 64bit) */
static void potion_x86_c_arg(Potion *P, PNAsm * volatile *asmp, int out, int regn, int argn) {
#if __WORDSIZE != 64
// IA-32 cdecl ABI, non-microsoft only. TODO: win32 stdcall for the w32api ffi
if (argn == 0) {
// OPT: the first argument is always (Potion *)
if (!out) {
ASM(0x8b); ASM(0x55); ASM(2 * sizeof(PN));
ASM(0x89); ASM(0x14); ASM(0x24);
}
}
else {
if (out == 2) {
ASM(0xc7); ASM(0x44); ASM(0x24); ASM(argn * sizeof(PN)); ASMI(regn); //mov $regn, argn(%esp)
} else if (out) {
ASM(0x8b); ASM(0x55); ASM(RBP(regn)); //mov -0x8(%ebp), %edx
}
if (!out) argn += 2;
if (out == 1) {
ASM(0x89); ASM(0x54); ASM(0x24); ASM(argn * sizeof(PN)); //mov %edx, argn(%esp)
} else if (!out) {
ASM(0x8b); ASM(0x55); ASM(argn * sizeof(PN));
}
if (!out) {
ASM(0x89); ASM(0x55); ASM(RBP(regn));
}
}
#else
// sysv amd64 only (rdi,rsi,rdx,rcx,r8,r9), windows msvc not supported (rcx,rdx,r8,r9)
// xmm0-7 not yet
switch (argn) {
case 0: //rdi Potion *P
if (out == 2) { // unused - mov $regn, %rdi
X86_PRE(); ASM(0xc7); ASM(0xc7); ASMI(regn);
} else { // mov -regn(%rbp), %rdi
X86_PRE(); ASM(out ? 0x8b : 0x89); ASM(0x7d); ASM(RBP(regn));
}
break;
case 1: //rsi PN cl
if (out == 2) { // unused - mov $regn, %rsi
X86_PRE(); ASM(0xc7); ASM(0xc6); ASMI(regn);
} else { // mov -regn(%rbp), %rsi
X86_PRE(); ASM(out ? 0x8b : 0x89); ASM(0x75); ASM(RBP(regn));
}
break;
case 2: //rdx self
if (out == 2) { // unused - mov $regn, %rdx
X86_PRE(); ASM(0xc7); ASM(0xc2); ASMI(regn);
} else { // mov -regn(%rbp), %rdx
X86_PRE(); ASM(out ? 0x8b : 0x89); ASM(0x55); ASM(RBP(regn));
}
break;
case 3: //rcx
if (out == 2) { // 1st default arg - mov $regn, %rcx
X86_PRE(); ASM(0xc7); ASM(0xc1); ASMI(regn);
} else { // mov -regn(%rbp), %rcx
X86_PRE(); ASM(out ? 0x8b : 0x89); ASM(0x4d); ASM(RBP(regn));
}
break;
case 4: //r8
if (out == 2) { // 2nd default arg - mov $regn, %r8
ASM(0x49); ASM(0xc7); ASM(0xc0); ASMI(regn);
} else { // mov -regn(%rbp), %r8
ASM(0x4c); ASM(out ? 0x8b : 0x89); ASM(0x45); ASM(RBP(regn));
}
break;
case 5: //r9
if (out == 2) { // 3rd default arg - mov $regn, %r9
ASM(0x49); ASM(0xc7); ASM(0xc1); ASMI(regn);
} else { // mov -regn(%rbp), %r9
ASM(0x4c); ASM(out ? 0x8b : 0x89); ASM(0x4d); ASM(RBP(regn));
}
break;
default: // can only pass max 6 arg via regs, rest on stack
if (out) {
X86_PRE(); ASM(0x8B); ASM(0x5d); ASM(RBP(regn)); // mov %rbp(A) %rbx
if (argn == 6) {
X86_PRE(); ASM(0x89); ASM(0x1c); ASM(0x24); // mov %rbx (%rsp)
} else {
X86_PRE(); ASM(0x89); ASM(0x5c); ASM(0x24); ASM((argn - 6) * sizeof(PN)); // mov %rbx N(%rsp)
}
} else {
X86_PRE(); ASM(0x8b); ASM(0x5d); ASM((argn - 4) * sizeof(PN));
X86_PRE(); ASM(0x89); ASM(0x5d); ASM(RBP(regn)); // mov %rbp(A) %rbx
}
break;
}
#endif
}
void potion_x86_setup(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp) {
ASM(0x55); // push %rbp
X86_PRE(); ASM(0x89); ASM(0xE5); // mov %rsp,%rbp
}
void potion_x86_stack(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, long need) {
/* maintain 16-byte stack alignment. OS X in particular requires it, because
* it expects to be able to use movdqa on things on the stack.
* we factor in the offset from our saved ebp and return address, so that
* adds 8 for x86 and 0 (mod 16) for x86_64. */
int rsp = X86C(16,0)+((need-X86C(8,0)+15)&~(15));
if (rsp >= 0x80) {
X86_PRE(); ASM(0x81); ASM(0xEC); ASMI(rsp); // sub rsp, %esp
} else {
X86_PRE(); ASM(0x83); ASM(0xEC); ASM(rsp); // sub rsp, %esp
}
}
void potion_x86_registers(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, long start) {
PN_HAS_UPVALS(up);
// (Potion *, self) in the first argument slot, self in the first register
X86_ARGI(start - 3, 0);
X86_ARGI(start - 2, 1);
X86_ARGI(start - 1, 2);
X86_ARGI(0, 2);
// empty locals, since use of setlocal requires something there
if (up) {
int argx = 0, regs = PN_INT(f->stack);
for (argx = 0; argx < PN_TUPLE_LEN(f->locals); argx++) {
X86_MOVQ(regs + argx, PN_NIL);
}
}
}
void potion_x86_local(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, long reg, long arg) {
X86_ARGI(reg, 3 + arg);
}
void potion_x86_upvals(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, long lregs, long start, int upc) {
int upi;
for (upi = 0; upi < upc; upi++) {
X86_MOV_RBP(0x8B, start - 2);
X86_PRE(); ASM(0x8B); ASM(0x40);
ASM(sizeof(struct PNClosure) + ((upi + 1) * sizeof(PN))); // 0x30(%rax)
X86_MOV_RBP(0x89, lregs + upi);
}
}
void potion_x86_jmpedit(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, unsigned char *asmj, int dist) {
*((int *)asmj) = dist;
}
void potion_x86_move(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_MOV_RBP(0x8B, op.b);
X86_MOV_RBP(0x89, op.a);
}
void potion_x86_loadpn(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_MOVQ(op.a, op.b);
}
PN potion_f_values(Potion *P, PN cl) {
return potion_fwd(PN_PROTO(PN_CLOSURE(cl)->data[0])->values);
}
void potion_x86_loadk(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, long start) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_ARGO(start - 3, 0);
X86_ARGO(start - 2, 1);
X86_PRE(); ASM(0xB8); ASMN(potion_f_values); // mov &potion_f_values %rax
ASM(0xFF); ASM(0xD0); // callq %rax
X86_PRE(); ASM(0x05); ASMI(sizeof(struct PNTuple)
+ (op.b * sizeof(PN))); // add N,%rax
X86_PRE(); ASM(0x8B); ASM(0); // mov (%rax) %rax
X86_MOV_RBP(0x89, op.a);
}
void potion_x86_self(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, long start) {
PN_OP op = PN_OP_AT(f->asmb, pos);
// TODO: optimize so that if this is followed by a BIND or MSG, it'll just
// use the self register directly.
X86_MOV_RBP(0x8B, start - 1);
X86_MOV_RBP(0x89, op.a);
}
void potion_x86_getlocal(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, long regs) {
PN_OP op = PN_OP_AT(f->asmb, pos);
PN_HAS_UPVALS(up);
X86_MOV_RBP(0x8B, regs + op.b); // mov %rsp(B) %rax
if (up) {
ASM(0xF6); ASM(0xC0); ASM(0x01); // test 0x1 %al
ASM(0x75); ASM(X86C(19, 20)); // jnz [b]
ASM(0xF7); ASM(0xC0); ASMI(PN_REF_MASK); // test REFMASK %eax
ASM(0x74); ASM(X86C(11, 12)); // jz [b]
ASM(0x81); ASM(0x38); ASMI(PN_TWEAK); // cmpq WEAK (%rax)
ASM(0x75); ASM(X86C(3, 4)); // jnz [a]
X86_PRE(); ASM(0x8B); ASM(0x40);
ASM(sizeof(struct PNObject)); // mov N(%rax) %rax
}
X86_MOV_RBP(0x89, op.a); // [a]: mov %rax %rsp(A)
}
void potion_x86_setlocal(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, long regs) {
PN_OP op = PN_OP_AT(f->asmb, pos);
PN_HAS_UPVALS(up);
X86_PRE(); ASM(0x8B); ASM(0x55); ASM(RBP(op.a)); // mov %rsp(A) %rdx
if (up) {
X86_MOV_RBP(0x8B, regs + op.b); // mov %rsp(B) %rax
ASM(0xF6); ASM(0xC0); ASM(0x01); // test 0x1 %al
ASM(0x75); ASM(X86C(19, 20)); // jnz [b]
ASM(0xF7); ASM(0xC0); ASMI(PN_REF_MASK); // test REFMASK %eax
ASM(0x74); ASM(X86C(11, 12)); // jz [b]
ASM(0x81); ASM(0x38); ASMI(PN_TWEAK); // cmpq WEAK (%rax)
ASM(0x75); ASM(X86C(3, 4)); // jnz [a]
X86_PRE(); ASM(0x89); ASM(0x50);
ASM(sizeof(struct PNObject)); // mov N(%rax) %rax
}
X86_PRE(); ASM(0x89); ASM(0x55); ASM(RBP(regs + op.b)); // mov %rdx %rsp(B)
}
void potion_x86_getupval(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, long lregs) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_MOV_RBP(0x8B, lregs + op.b);
X86_PRE(); ASM(0x8B); ASM(0x40); ASM(sizeof(struct PNObject));
X86_MOV_RBP(0x89, op.a);
}
// TODO: place the upval in the write barrier (or have stack scanning handle weak refs)
void potion_x86_setupval(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, long lregs) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_PRE(); ASM(0x8B); ASM(0x55); ASM(RBP(op.a)); // mov -A(%rbp) %edx
X86_MOV_RBP(0x8B, lregs + op.b); // mov %rsp(B) %rax
X86_PRE(); ASM(0x89); ASM(0x50); ASM(sizeof(struct PNObject));// mov %rdx %rax.data
}
void potion_x86_global(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, long start) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_ARGO(start - 3, 0);
X86_ARGO(op.a, 1);
X86_ARGO(op.b, 2);
X86_PRE(); ASM(0xB8); ASMN(potion_define_global);
ASM(0xFF); ASM(0xD0);
X86_MOV_RBP(0x8B, op.b); // mov -B(%rbp) %eax
X86_PRE(); ASM(0x89); ASM(0x45); ASM(RBP(op.a)); // mov %eax -A(%rbp)
}
void potion_x86_newtuple(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, long start) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_ARGO(start - 3, 0);
X86_PRE(); ASM(0xB8); ASMN(potion_tuple_empty);// mov &potion_tuple_empty %rax
ASM(0xFF); ASM(0xD0); // callq %rax
X86_MOV_RBP(0x89, op.a); // mov %rax local
}
void potion_x86_settuple(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, long start) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_ARGO(start - 3, 0);
X86_ARGO(op.a, 1);
X86_ARGO(op.b, 2);
X86_PRE(); ASM(0xB8); ASMN(potion_tuple_push);// mov &potion_tuple_push %rax
ASM(0xFF); ASM(0xD0); // callq %rax
X86_MOV_RBP(0x89, op.a); // mov %rax local
}
void potion_x86_settable(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, long start) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_ARGO(start - 3, 0);
X86_ARGO(op.a, 1);
X86_ARGO(op.a + 1, 2);
X86_ARGO(op.b, 3);
X86_PRE(); ASM(0xB8); ASMN(potion_table_set); // mov &potion_table_set %rax
ASM(0xFF); ASM(0xD0); // callq %rax
X86_MOV_RBP(0x89, op.a); // mov %rax local
}
void potion_x86_newlick(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, long start) {
int nnil = 0;
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_ARGO(start - 3, 0);
X86_ARGO(op.a, 1);
if (op.b > op.a) {
X86_ARGO(op.a + 1, 2);
} else {
nnil = 1;
X86_MOVQ(op.a, PN_NIL);
X86_ARGO(op.a, 2);
}
if (op.b > op.a + 1) {
X86_ARGO(op.b, 3);
} else {
if (!nnil) { X86_MOVQ(op.a, PN_NIL); }
X86_ARGO(op.a, 3);
}
X86_PRE(); ASM(0xB8); ASMN(potion_lick); // mov &potion_lick %rax
ASM(0xFF); ASM(0xD0); // callq %rax
X86_MOV_RBP(0x89, op.a); // mov %rax local
}
void potion_x86_getpath(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, long start) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_ARGO(start - 3, 0);
X86_ARGO(op.a, 2);
X86_ARGO(op.b, 3);
X86_PRE(); ASM(0xB8); ASMN(potion_obj_get); // mov &potion_obj_get %rax
ASM(0xFF); ASM(0xD0); // callq %rax
X86_MOV_RBP(0x89, op.a); // mov %rax local
}
void potion_x86_setpath(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, long start) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_ARGO(start - 3, 0);
X86_ARGO(op.a, 2);
X86_ARGO(op.a + 1, 3);
X86_ARGO(op.b, 4);
X86_PRE(); ASM(0xB8); ASMN(potion_obj_set); // mov &potion_obj_set %rax
ASM(0xFF); ASM(0xD0); // callq %rax
}
void potion_x86_add(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, long start) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_MATH(1, potion_obj_add, {
X86_PRE(); ASM(0x8D); ASM(0x44); ASM(0x10); ASM(0xFF); // lea -1(%eax,%edx,1),%eax
});
}
void potion_x86_sub(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, long start) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_MATH(1, potion_obj_sub, {
X86_PRE(); ASM(0x29); ASM(0xD0); // sub %edx %eax
X86_PRE(); ASM(0xFF); ASM(0xC0); // inc %eax
});
}
void potion_x86_mult(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, long start) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_MATH(1, potion_obj_mult, {
X86_PRE(); ASM(0xD1); ASM(0xFA); // sar %rdx
X86_PRE(); ASM(0xFF); ASM(0xC8); // dec %rax
X86_PRE(); ASM(0x0F); ASM(0xAF); ASM(0xC2); // imul %rdx %rax
X86_PRE(); ASM(0xFF); ASM(0xC0); // inc %rax
});
}
void potion_x86_div(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, long start) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_MATH(1, potion_obj_div, {
ASM(0xD1); ASM(0xF8); // sar %rax
ASM(0xD1); ASM(0xFA); // sar %edx
ASM(0x89); ASM(0xD1); // mov %edx %ecx
ASM(0x89); ASM(0xC2); // mov %eax %edx
ASM(0xC1); ASM(0xFA); ASM(0x1F); // sar 0x1f %edx
ASM(0xF7); ASM(0xF9); // idiv %ecx
ASM(0x8D); ASM(0x44); ASM(0x00); ASM(0x01); // lea 0x1(%eax,%eax,1),%eax
});
}
void potion_x86_rem(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, long start) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_MATH(1, potion_obj_rem, {
ASM(0xD1); ASM(0xF8); // sar %rax
ASM(0xD1); ASM(0xFA); // sar %edx
ASM(0x89); ASM(0xD1); // mov %edx %ecx
ASM(0x89); ASM(0xC2); // mov %eax %edx
ASM(0xC1); ASM(0xFA); ASM(0x1F); // sar 0x1f %edx
ASM(0xF7); ASM(0xF9); // idiv %ecx
ASM(0x8D); ASM(0x44); ASM(0x12); ASM(0x01); // lea 0x1(%edx,%edx,1),%eax
});
}
void potion_x86_pow(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, long start) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_ARGO(start - 3, 0);
X86_ARGO(op.a, 2);
X86_ARGO(op.b, 3);
X86_PRE(); ASM(0xB8); ASMN(potion_pow);// mov &potion_pow %rax
ASM(0xFF); ASM(0xD0); // callq %rax
X86_MOV_RBP(0x89, op.a); // mov %rax local
}
void potion_x86_neq(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_CMP(0x74); // je
}
void potion_x86_eq(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_CMP(0x75); // jne
}
void potion_x86_lt(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_CMP(0x7D); // jge
}
void potion_x86_lte(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_CMP(0x7F); // jg
}
void potion_x86_gt(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_CMP(0x7E); // jle
}
void potion_x86_gte(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_CMP(0x7C); // jl
}
void potion_x86_bitn(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, long start) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_MATH(0, potion_obj_bitn, {
X86_PRE(); ASM(0xF7); ASM(0xD0); // not %eax
X86_PRE(); ASM(0xFF); ASM(0xC0); // inc %rax
});
}
void potion_x86_bitl(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, long start) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_MATH(1, potion_obj_bitl, {
ASM(0xD1); ASM(0xF8); // sar %eax
ASM(0xD1); ASM(0xFA); // sar %edx
ASM(0x89); ASM(0xD1); // mov %edx %ecx
ASM(0x89); ASM(0xC2); // mov %eax %edx
ASM(0xD3); ASM(0xE0); // sar %cl %eax
ASM(0x8D); ASM(0x44); ASM(0x00); ASM(0x01); // lea 0x1(%eax,%eax,1),%eax
});
}
void potion_x86_bitr(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, long start) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_MATH(1, potion_obj_bitr, {
ASM(0xD1); ASM(0xF8); // sar %rax
ASM(0xD1); ASM(0xFA); // sar %edx
ASM(0x89); ASM(0xD1); // mov %edx %ecx
ASM(0x89); ASM(0xC2); // mov %eax %edx
ASM(0xD3); ASM(0xF8); // sar %cl %eax
ASM(0x8D); ASM(0x44); ASM(0x00); ASM(0x01); // lea 0x1(%eax,%eax,1),%eax
});
}
void potion_x86_def(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, long start) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_ARGO(start - 3, 0);
X86_ARGO(op.a, 2);
X86_ARGO(op.a + 1, 3);
X86_ARGO(op.b, 4);
X86_PRE(); ASM(0xB8); ASMN(potion_def_method); // mov &potion_def_method %rax
ASM(0xFF); ASM(0xD0); // callq %rax
X86_MOV_RBP(0x89, op.a); // mov %rax local
}
void potion_x86_bind(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, long start) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_ARGO(start - 3, 0); // mov &P 0(%esp) (0, 3)
X86_ARGO(op.b, 1); // mov B 1(%esp) - new env (7, 3)
X86_ARGO(op.a, 2); // mov A 2(%esp) (7, 3)
X86_PRE(); ASM(0xB8); ASMN(potion_bind); // mov &potion_bind %rax
ASM(0xFF); ASM(0xD0); // callq %rax
X86_MOV_RBP(0x89, op.a); // mov %rax local
}
void potion_x86_message(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, long start) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_ARGO(start - 3, 0); // mov &P 0(%esp) (0, 3)
X86_ARGO(op.b, 1); // mov B 1(%esp) - new env (7, 3)
X86_ARGO(op.a, 2); // mov A 2(%esp) (7, 3)
X86_PRE(); ASM(0xB8); ASMN(potion_message); // mov &potion_message %rax
ASM(0xFF); ASM(0xD0); // callq %rax
X86_MOV_RBP(0x89, op.a); // mov %rax local
}
void potion_x86_jmp(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, PNJumps *jmps, size_t *offs, int *jmpc) {
PN_OP op = PN_OP_AT(f->asmb, pos);
TAG_JMP(pos + op.a);
}
void potion_x86_test_asm(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, int test) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_MOV_RBP(0x8B, op.a); // mov -A(%rbp) %rax
X86_PRE(); ASM(0x83); ASM(0xF8); ASM(PN_FALSE); // cmp FALSE %rax
ASM(0x74); ASM(X86C(13, 21)); // je +10
X86_PRE(); ASM(0x85); ASM(0xC0); // test %rax %rax
ASM(0x74); ASM(X86C(9, 16)); // je +5
X86_MOVQ(op.a, test ? PN_FALSE : PN_TRUE); // -A(%rbp) = TRUE
ASM(0xEB); ASM(X86C(7, 14)); // jmp +7
X86_MOVQ(op.a, test ? PN_TRUE : PN_FALSE); // -A(%rbp) = FALSE
}
void potion_x86_test(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos) {
potion_x86_test_asm(P, f, asmp, pos, 0);
}
void potion_x86_not(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos) {
potion_x86_test_asm(P, f, asmp, pos, 1);
}
void potion_x86_cmp(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos) {
potion_x86_test_asm(P, f, asmp, pos, 0);
}
void potion_x86_testjmp(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, PNJumps *jmps, size_t *offs, int *jmpc) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_MOV_RBP(0x8B, op.a); // mov -A(%rbp) %rax
X86_PRE(); ASM(0x83); ASM(0xF8); ASM(PN_FALSE); // cmp FALSE %rax
ASM(0x74); ASM(X86C(9, 10)); // jz +10
X86_PRE(); ASM(0x85); ASM(0xC0); // test %rax %rax
ASM(0x74); ASM(5);
TAG_JMP(pos + op.b);
}
void potion_x86_notjmp(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, PNJumps *jmps, size_t *offs, int *jmpc) {
PN_OP op = PN_OP_AT(f->asmb, pos);
DBG_t("; notjmp %d => %d\n", op.a, op.b);
X86_MOV_RBP(0x8B, op.a); // mov -A(%rbp) %rax
X86_PRE(); ASM(0x83); ASM(0xF8); ASM(PN_FALSE); // cmp FALSE %rax
ASM(0x74); ASM(X86C(4, 5)); // jz +5
X86_PRE(); ASM(0x85); ASM(0xC0); // test %rax %rax
ASM(0x75); ASM(5); // jnz +5
TAG_JMP(pos + op.b);
}
void potion_x86_named(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, long start) {
PN_OP op = PN_OP_AT(f->asmb, pos);
DBG_t("; named %d %d\n", op.a, op.b);
X86_ARGO(start - 3, 0); //P
X86_ARGO(op.a, 1); //cl
X86_ARGO(op.b - 1, 2); //name
X86_PRE(); ASM(0xB8); ASMN(potion_sig_find); // mov &potion_sig_find %rax
ASM(0xFF); ASM(0xD0); // callq %eax
ASM(0x85); ASM(0xC0); // test %eax %eax
ASM(0x78); ASM(X86C(9, 12)); // js +12
X86_PRE(); ASM(0xF7); ASM(0xD8); // neg %rax
X86_PRE(); ASM(0x8B); ASM(0x55); ASM(RBP(op.b)); // mov -B(%rbp) %rdx
#if __WORDSIZE != 64
ASM(0x89); ASM(0x54); ASM(0x85); ASM(RBP(op.a + 2)); // mov %edx -A(%ebp,%eax,4)
#else
X86_PRE(); ASM(0x89); ASM(0x54); ASM(0xC5); ASM(RBP(op.a + 2)); // mov %rdx -A(%rbp,%rax,8)
#endif
}
// TODO: check for bytecode nodes and jit them as well?
void potion_x86_call(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, long start) {
PN_OP op = PN_OP_AT(f->asmb, pos);
int argc = op.b - op.a; // including self
int i;
// check type of the closure
X86_PRE(); ASM(0x8B); ASM(0x45); ASM(RBP(op.a)); // mov %rbp(A) %rax
ASM(0xF6); ASM(0xC0); ASM(0x01); // test 0x1 %al
ASM(0x75); ASM(X86C(56, 68)); // jne [a]
ASM(0xF7); ASM(0xC0); ASMI(PN_REF_MASK); // test REFMASK %eax
ASM(0x74); ASM(X86C(48, 60)); // je [a]
X86_PRE(); ASM(0x83); ASM(0xE0); ASM(0xF8); // and ~PRIMITIVE %rax
// if a class, pull out the constructor
ASM(0x81); ASM(0x38); ASMI(PN_TVTABLE); // cmpq VTABLE (%eax)
ASM(0x75); ASM(X86C(26, 36)); // jnz [c]
X86_ARGO(start - 3, 0); // mov &P 0(%esp)
X86_ARGO(op.a, 2); // mov A 2(%esp)
X86_PRE(); ASM(0xB8); ASMN(potion_object_new); // mov &potion_object_new %rax
ASM(0xFF); ASM(0xD0); // callq %rax
X86_MOV_RBP(0x89, op.a + 1); // [c]: mov %rax local
X86_PRE(); ASM(0x8B); ASM(0x45); ASM(RBP(op.a)); // mov %rbp(A) %rax
X86_PRE(); ASM(0x8B); ASM(0x40);
ASM((char *)&((struct PNVtable *)P->lobby)->ctor
- (char *)P->lobby); // mov N(%rax) %rax
X86_PRE(); ASM(0x89); ASM(0x45); ASM(RBP(op.a)); // mov %rax %rbp(A)
// check type of the closure
ASM(0x81); ASM(0x38); ASMI(PN_TCLOSURE); // cmpq CLOSURE (%eax)
ASM(0x74); ASM(X86C(22, 30)); // jz [a]
// if not a closure, get the type's closure
X86_MOV_RBP(0x8B, op.a);
X86_MOV_RBP(0x89, op.a + 1);
X86_ARGO(start - 3, 0); // mov &P 0(%esp)
X86_ARGO(op.a, 1); // mov A 1(%esp)
X86_PRE(); ASM(0xB8); ASMN(potion_obj_get_call); // mov &potion_obj_get_call %rax
ASM(0xFF); ASM(0xD0); // [b]: callq *%rax
ASM(0xEB); ASM(X86C(3, 4)); // jmp [b]
//[a]: get the closure's function
X86_PRE(); ASM(0x8B); ASM(0x45); ASM(RBP(op.a)); // [a]: mov %rbp(A) %rax
//[b]: got the method, call it (first special slot from PNClosure)
X86_PRE(); ASM(0x8B); ASM(0x40);
ASM(sizeof(struct PNObject)); // [b]: mov N(%rax) %rax
// (Potion *, CL) as the first arguments
X86_ARGO(start - 3, 0);
X86_ARGO(op.a, 1);
DBG_t("; call %ld[0] %d[1] ", start-3, op.a);
for (i=2; i <= argc+1; i++) {
DBG_t("%d[%d] ", op.a + i - 1, i);
X86_ARGO(op.a + i - 1, i); // mov regn, i(%esp)
}
// fill in defaults, arity from protos[0], not f
if (!PN_IS_EMPTY(f->protos)) {
vPN(Proto) c = (vPN(Proto)) PN_TUPLE_AT(f->protos, 0);
if ((argc-1 < c->arity) && c->arity) {
for (i = argc+1; i <= c->arity+1; i++) { //2: [0,1],2,3
PN sig = potion_sig_at(P, c->sig, i-2);
if (sig && PN_TUPLE_LEN(sig) == 3) {
DBG_t(":=*%s[%d] ", AS_STR(PN_TUPLE_AT(sig, 2)), i+1);
X86_ARGO_IMM(PN_TUPLE_AT(sig, 2), i+1); // mov $value, i(%esp) - default
}}}}
DBG_t("\n");
ASM(0xFF); ASM(0xD0); // callq *%rax
X86_PRE(); ASM(0x89); ASM(0x45); ASM(RBP(op.a)); // mov %rbp(A) %rax
}
void potion_x86_callset(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, long start) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_ARGO(start - 3, 0);
X86_ARGO(op.b, 1);
X86_PRE(); ASM(0xB8); ASMN(potion_obj_get_callset); // mov &potion_obj_get %rax
ASM(0xFF); ASM(0xD0); // callq %rax
X86_MOV_RBP(0x89, op.a); // mov %rax local
}
void potion_x86_return(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos) {
X86_MOV_RBP(0x8B, 0); // mov -0(%rbp) %eax
ASM(0xC9); ASM(0xC3); // leave; ret
}
PN potion_f_protos(Potion *P, PN cl, PN i) {
PN p = PN_PROTO(PN_CLOSURE(cl)->data[0])->protos;
PN proto = PN_TUPLE_AT(p, i);
vPN(Closure) c = (struct PNClosure *)potion_closure_new(P, NULL,
PN_PROTO(proto)->sig, PN_TUPLE_LEN(PN_PROTO(proto)->upvals) + 1);
c->method = PN_PROTO(proto)->jit;
c->data[0] = proto;
return (PN)c;
}
void potion_x86_method(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE *pos, long lregs, long start, long regs) {
PN_OP op = PN_OP_AT(f->asmb, *pos);
PN proto = PN_TUPLE_AT(f->protos, op.b);
X86_ARGO(start - 3, 0);
X86_ARGO(start - 2, 1);
X86_MOVQ(op.a, op.b);
X86_ARGO(op.a, 2);
X86_PRE(); ASM(0xB8); ASMN(potion_f_protos); // mov &potion_f_values %rax
ASM(0xFF); ASM(0xD0); // callq %rax
X86_MOV_RBP(0x89, op.a);
X86_MOVQ(start - 3, P);
PN_TUPLE_COUNT(PN_PROTO(proto)->upvals, i, {
(*pos)++;
PN_OP opp = PN_OP_AT(f->asmb, *pos);
if (opp.code == OP_GETUPVAL) {
X86_PRE(); ASM(0x8B); ASM(0x55); ASM(RBP(lregs + opp.b)); // mov upval %rdx
} else if (opp.code == OP_GETLOCAL) {
X86_ARGO(start - 3, 0);
X86_ARGO(regs + opp.b, 1);
X86_PRE(); ASM(0xB8); ASMN(potion_ref); // mov &potion_ref %rax
ASM(0xFF); ASM(0xD0); // callq %rax
X86_PRE(); ASM(0x89); ASM(0xC2); // mov %rax %rdx
X86_MOV_RBP(0x89, regs + opp.b); // mov %rax local
} else {
fprintf(stderr, "** missing an upval to proto %p\n", (void *)proto);
}
X86_MOV_RBP(0x8B, opp.a); // mov cl %rax
X86_PRE(); ASM(0x89); ASM(0x50); // mov %rdx N(%rax)
ASM(sizeof(struct PNClosure) + (sizeof(PN) * (i + 1)));
});
}
void potion_x86_class(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp, PN_SIZE pos, long start) {
PN_OP op = PN_OP_AT(f->asmb, pos);
X86_ARGO(start - 3, 0);
X86_ARGO(op.b, 1);
X86_ARGO(op.a, 2);
X86_PRE(); ASM(0xB8); ASMN(potion_vm_class); // mov &potion_vm_class %rax
ASM(0xFF); ASM(0xD0); // callq %rax
X86_MOV_RBP(0x89, op.a); // mov %rax local
}
void potion_x86_finish(Potion *P, struct PNProto * volatile f, PNAsm * volatile *asmp) {
}
void potion_x86_mcache(Potion *P, vPN(Vtable) vt, PNAsm * volatile *asmp) {
unsigned k;
#if __WORDSIZE != 64
ASM(0x55); // push %ebp
ASM(0x89); ASM(0xE5); // mov %esp %ebp
ASM(0x8B); ASM(0x55); ASM(0x08); // mov 0x8(%ebp) %edx
#endif
for (k = kh_end(vt->methods); k > kh_begin(vt->methods); k--) {
if (kh_exist(PN, vt->methods, k - 1)) {
ASM(0x81); ASM(X86C(0xFA, 0xFF));
ASMI(PN_UNIQ(kh_key(PN, vt->methods, k - 1))); // cmp NAME %edi
ASM(0x75); ASM(X86C(7, 11)); // jne +11
X86_PRE(); ASM(0xB8); ASMN(kh_val(PN, vt->methods, k - 1)); // mov CL %rax
#if __WORDSIZE != 64
ASM(0x5D);
#endif
ASM(0xC3); // retq
}
}
ASM(0xB8); ASMI(0); // mov NIL %eax
#if __WORDSIZE != 64
ASM(0x5D);
#endif
ASM(0xC3); // retq
}
void potion_x86_ivars(Potion *P, PN ivars, PNAsm * volatile *asmp) {
#if __WORDSIZE != 64
ASM(0x55); // push %ebp
ASM(0x89); ASM(0xE5); // mov %esp %ebp
ASM(0x8B); ASM(0x55); ASM(0x08); // mov 0x8(%ebp) %edx
#else
#endif
PN_TUPLE_EACH(ivars, i, v, {
ASM(0x81); ASM(X86C(0xFA, 0xFF));
ASMI(PN_UNIQ(v)); // cmp UNIQ %edi
ASM(0x75); ASM(X86C(7, 6)); // jne +7
ASM(0xB8); ASMI(i); // mov i %rax
#if __WORDSIZE != 64
ASM(0x5D);
#endif
ASM(0xC3); // retq
});
X86_PRE(); ASM(0xB8); ASMN(-1); // mov -1 %rax
#if __WORDSIZE != 64
ASM(0x5D);
#endif
ASM(0xC3); // retq
}
MAKE_TARGET(x86);