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x86-64: fix gtst, back to only 5 regs for now

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This commit is contained in:
grischka 2009-12-20 20:33:21 +01:00
parent 070b86a870
commit b54862406e
1 changed files with 9 additions and 17 deletions
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26
x86_64-gen.c
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@ -270,7 +270,6 @@ static void gen_gotpcrel(int r, Sym *sym, int c)
greloc(cur_text_section, sym, ind, R_X86_64_PC32);
#endif
gen_le32(0);
if (c) {
/* we use add c, %xxx for displacement */
orex(1, r, 0, 0x81);
@ -323,8 +322,8 @@ static void gen_modrm(int op_reg, int r, Sym *sym, int c)
static void gen_modrm64(int opcode, int op_reg, int r, Sym *sym, int c)
{
int is_got;
orex(1, r, op_reg, opcode);
is_got = (op_reg & TREG_MEM) && !(sym->type.t & VT_STATIC);
orex(1, r, op_reg, opcode);
gen_modrm_impl(op_reg, r, sym, c, is_got);
}
@ -833,8 +832,6 @@ void gfunc_call(int nb_args)
}
}
save_regs(0); /* save used temporary registers */
/* for struct arguments, we need to call memcpy and the function
call breaks register passing arguments we are preparing.
So, we process arguments which will be passed by stack first. */
@ -899,6 +896,7 @@ void gfunc_call(int nb_args)
}
vtop = orig_vtop;
save_regs(0); /* save used temporary registers */
/* then, we prepare register passing arguments.
Note that we cannot set RDX and RCX in this loop because gv()
@ -922,19 +920,13 @@ void gfunc_call(int nb_args)
/* simple type */
/* XXX: implicit cast ? */
if (j < REGN) {
int d = arg_regs[j];
r = gv(RC_INT);
if (j < 2) {
o(0x8948); /* mov */
o(0xc0 + r * 8 + arg_regs[j]);
} else if (j < 4) {
o(0x8949); /* mov */
if (j == 2 || j == 3)
/* j=2: r10, j=3: r11 */
o(0xc0 + r * 8 + j);
} else {
o(0x8949); /* mov */
/* j=4: r8, j=5: r9 */
o(0xc0 + r * 8 + j - 4);
}
d = j + 8;
orex(1,d,r,0x89); /* mov */
o(0xc0 + REG_VALUE(r) * 8 + REG_VALUE(d));
}
}
vtop--;
@ -1168,8 +1160,8 @@ int gtst(int inv, int t)
t = gjmp(t);
} else {
v = gv(RC_INT);
o(0x85);
o(0xc0 + v * 9);
orex(0,v,v,0x85);
o(0xc0 + REG_VALUE(v) * 9);
g(0x0f);
t = psym(0x85 ^ inv, t);
}