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/*
Copyright (c) 2015 DataLab, s.l. <http://www.datalab.es>
This file is part of GlusterFS.
This file is licensed to you under your choice of the GNU Lesser
General Public License, version 3 or any later version (LGPLv3 or
later), or the GNU General Public License, version 2 (GPLv2), in all
cases as published by the Free Software Foundation.
*/
#include <errno.h>
#include "ec-code-intel.h"
static ec_code_intel_reg_t ec_code_x64_regmap[] = {
REG_AX, REG_CX, REG_BP, REG_8, REG_9, REG_10,
REG_11, REG_12, REG_13, REG_14, REG_15
};
static void
ec_code_x64_prolog(ec_code_builder_t *builder)
{
uint32_t i;
ec_code_intel_op_push_r(builder, REG_BP);
if (!builder->linear) {
ec_code_intel_op_push_r(builder, REG_BX);
}
if (builder->regs > 11) {
ec_code_error(builder, EINVAL);
return;
}
for (i = 7; i < builder->regs; i++) {
ec_code_intel_op_push_r(builder, ec_code_x64_regmap[i]);
}
builder->loop = builder->address;
}
static void
ec_code_x64_epilog(ec_code_builder_t *builder)
{
uint32_t i;
ec_code_intel_op_add_i2r(builder, 8, REG_DX);
ec_code_intel_op_add_i2r(builder, 8, REG_DI);
ec_code_intel_op_test_i2r(builder, builder->width - 1, REG_DX);
ec_code_intel_op_jne(builder, builder->loop);
if (builder->regs > 11) {
ec_code_error(builder, EINVAL);
}
for (i = builder->regs; i > 7; i--) {
ec_code_intel_op_pop_r(builder, ec_code_x64_regmap[i - 1]);
}
if (!builder->linear) {
ec_code_intel_op_pop_r(builder, REG_BX);
}
ec_code_intel_op_pop_r(builder, REG_BP);
ec_code_intel_op_ret(builder, 0);
}
static void
ec_code_x64_load(ec_code_builder_t *builder, uint32_t dst, uint32_t idx,
uint32_t bit)
{
dst = ec_code_x64_regmap[dst];
if (builder->linear) {
ec_code_intel_op_mov_m2r(builder, REG_SI, REG_DX, 1,
idx * builder->width * builder->bits +
bit * builder->width,
dst);
} else {
if (builder->base != idx) {
ec_code_intel_op_mov_m2r(builder, REG_SI, REG_NULL, 0, idx * 8,
REG_BX);
builder->base = idx;
}
ec_code_intel_op_mov_m2r(builder, REG_BX, REG_DX, 1,
bit * builder->width, dst);
}
}
static void
ec_code_x64_store(ec_code_builder_t *builder, uint32_t src, uint32_t bit)
{
src = ec_code_x64_regmap[src];
ec_code_intel_op_mov_r2m(builder, src, REG_DI, REG_NULL, 0,
bit * builder->width);
}
static void
ec_code_x64_copy(ec_code_builder_t *builder, uint32_t dst, uint32_t src)
{
dst = ec_code_x64_regmap[dst];
src = ec_code_x64_regmap[src];
ec_code_intel_op_mov_r2r(builder, src, dst);
}
static void
ec_code_x64_xor2(ec_code_builder_t *builder, uint32_t dst, uint32_t src)
{
dst = ec_code_x64_regmap[dst];
src = ec_code_x64_regmap[src];
ec_code_intel_op_xor_r2r(builder, src, dst);
}
static void
ec_code_x64_xorm(ec_code_builder_t *builder, uint32_t dst, uint32_t idx,
uint32_t bit)
{
dst = ec_code_x64_regmap[dst];
if (builder->linear) {
ec_code_intel_op_xor_m2r(builder, REG_SI, REG_DX, 1,
idx * builder->width * builder->bits +
bit * builder->width,
dst);
} else {
if (builder->base != idx) {
ec_code_intel_op_mov_m2r(builder, REG_SI, REG_NULL, 0, idx * 8,
REG_BX);
builder->base = idx;
}
ec_code_intel_op_xor_m2r(builder, REG_BX, REG_DX, 1,
bit * builder->width, dst);
}
}
static char *ec_code_x64_needed_flags[] = {
NULL
};
ec_code_gen_t ec_code_gen_x64 = {
.name = "x64",
.flags = ec_code_x64_needed_flags,
.width = sizeof(uint64_t),
.prolog = ec_code_x64_prolog,
.epilog = ec_code_x64_epilog,
.load = ec_code_x64_load,
.store = ec_code_x64_store,
.copy = ec_code_x64_copy,
.xor2 = ec_code_x64_xor2,
.xor3 = NULL,
.xorm = ec_code_x64_xorm
};
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