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arm64: Implement __clear_cache.

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__clear_cache is defined in lib-arm64.c with a single call to
__arm64_clear_cache, which is the real built-in function and is
turned into inline assembler by gen_clear_cache in arm64-gen.c
This commit is contained in:
Edmund Grimley Evans
2015-03-08 00:10:44 +00:00
parent 03303628c7
commit d73b488401
5 changed files with 63 additions and 1 deletions
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48
arm64-gen.c
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@ -1771,6 +1771,54 @@ ST_FUNC void ggoto(void)
--vtop;
}
ST_FUNC void gen_clear_cache(void)
{
uint32_t beg, end, dsz, isz, p, lab1, b1;
gv2(RC_INT, RC_INT);
vpushi(0);
vtop->r = get_reg(RC_INT);
vpushi(0);
vtop->r = get_reg(RC_INT);
vpushi(0);
vtop->r = get_reg(RC_INT);
beg = intr(vtop[-4].r); // x0
end = intr(vtop[-3].r); // x1
dsz = intr(vtop[-2].r); // x2
isz = intr(vtop[-1].r); // x3
p = intr(vtop[0].r); // x4
vtop -= 5;
o(0xd53b0020 | isz); // mrs x(isz),ctr_el0
o(0x52800080 | p); // mov w(p),#4
o(0x53104c00 | dsz | isz << 5); // ubfx w(dsz),w(isz),#16,#4
o(0x1ac02000 | dsz | p << 5 | dsz << 16); // lsl w(dsz),w(p),w(dsz)
o(0x12000c00 | isz | isz << 5); // and w(isz),w(isz),#15
o(0x1ac02000 | isz | p << 5 | isz << 16); // lsl w(isz),w(p),w(isz)
o(0x51000400 | p | dsz << 5); // sub w(p),w(dsz),#1
o(0x8a240004 | p | beg << 5 | p << 16); // bic x(p),x(beg),x(p)
b1 = ind; o(0x14000000); // b
lab1 = ind;
o(0xd50b7b20 | p); // dc cvau,x(p)
o(0x8b000000 | p | p << 5 | dsz << 16); // add x(p),x(p),x(dsz)
*(uint32_t *)(cur_text_section->data + b1) =
(0x14000000 | (ind - b1) >> 2);
o(0xeb00001f | p << 5 | end << 16); // cmp x(p),x(end)
o(0x54ffffa3 | ((lab1 - ind) << 3 & 0xffffe0)); // b.cc lab1
o(0xd5033b9f); // dsb ish
o(0x51000400 | p | isz << 5); // sub w(p),w(isz),#1
o(0x8a240004 | p | beg << 5 | p << 16); // bic x(p),x(beg),x(p)
b1 = ind; o(0x14000000); // b
lab1 = ind;
o(0xd50b7520 | p); // ic ivau,x(p)
o(0x8b000000 | p | p << 5 | isz << 16); // add x(p),x(p),x(isz)
*(uint32_t *)(cur_text_section->data + b1) =
(0x14000000 | (ind - b1) >> 2);
o(0xeb00001f | p << 5 | end << 16); // cmp x(p),x(end)
o(0x54ffffa3 | ((lab1 - ind) << 3 & 0xffffe0)); // b.cc lab1
o(0xd5033b9f); // dsb ish
o(0xd5033fdf); // isb
}
ST_FUNC void gen_vla_sp_save(int addr) {
tcc_error("variable length arrays unsupported for this target");
}