642 lines
16 KiB
C
642 lines
16 KiB
C
/*
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* Helpers for HPPA instructions.
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*
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* Copyright (c) 2016 Richard Henderson <rth@twiddle.net>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "cpu.h"
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#include "exec/exec-all.h"
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#include "exec/helper-proto.h"
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#include "exec/cpu_ldst.h"
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void QEMU_NORETURN HELPER(excp)(CPUHPPAState *env, int excp)
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{
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HPPACPU *cpu = hppa_env_get_cpu(env);
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CPUState *cs = CPU(cpu);
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cs->exception_index = excp;
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cpu_loop_exit(cs);
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}
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static void QEMU_NORETURN dynexcp(CPUHPPAState *env, int excp, uintptr_t ra)
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{
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HPPACPU *cpu = hppa_env_get_cpu(env);
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CPUState *cs = CPU(cpu);
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cs->exception_index = excp;
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cpu_loop_exit_restore(cs, ra);
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}
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void HELPER(tsv)(CPUHPPAState *env, target_ureg cond)
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{
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if (unlikely((target_sreg)cond < 0)) {
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dynexcp(env, EXCP_OVERFLOW, GETPC());
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}
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}
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void HELPER(tcond)(CPUHPPAState *env, target_ureg cond)
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{
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if (unlikely(cond)) {
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dynexcp(env, EXCP_COND, GETPC());
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}
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}
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static void atomic_store_3(CPUHPPAState *env, target_ulong addr, uint32_t val,
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uint32_t mask, uintptr_t ra)
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{
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#ifdef CONFIG_USER_ONLY
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uint32_t old, new, cmp;
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uint32_t *haddr = g2h(addr - 1);
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old = *haddr;
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while (1) {
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new = (old & ~mask) | (val & mask);
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cmp = atomic_cmpxchg(haddr, old, new);
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if (cmp == old) {
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return;
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}
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old = cmp;
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}
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#else
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/* FIXME -- we can do better. */
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cpu_loop_exit_atomic(ENV_GET_CPU(env), ra);
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#endif
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}
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static void do_stby_b(CPUHPPAState *env, target_ulong addr, target_ureg val,
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bool parallel)
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{
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uintptr_t ra = GETPC();
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switch (addr & 3) {
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case 3:
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cpu_stb_data_ra(env, addr, val, ra);
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break;
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case 2:
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cpu_stw_data_ra(env, addr, val, ra);
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break;
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case 1:
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/* The 3 byte store must appear atomic. */
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if (parallel) {
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atomic_store_3(env, addr, val, 0x00ffffffu, ra);
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} else {
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cpu_stb_data_ra(env, addr, val >> 16, ra);
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cpu_stw_data_ra(env, addr + 1, val, ra);
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}
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break;
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default:
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cpu_stl_data_ra(env, addr, val, ra);
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break;
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}
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}
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void HELPER(stby_b)(CPUHPPAState *env, target_ulong addr, target_ureg val)
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{
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do_stby_b(env, addr, val, false);
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}
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void HELPER(stby_b_parallel)(CPUHPPAState *env, target_ulong addr,
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target_ureg val)
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{
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do_stby_b(env, addr, val, true);
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}
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static void do_stby_e(CPUHPPAState *env, target_ulong addr, target_ureg val,
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bool parallel)
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{
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uintptr_t ra = GETPC();
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switch (addr & 3) {
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case 3:
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/* The 3 byte store must appear atomic. */
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if (parallel) {
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atomic_store_3(env, addr - 3, val, 0xffffff00u, ra);
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} else {
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cpu_stw_data_ra(env, addr - 3, val >> 16, ra);
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cpu_stb_data_ra(env, addr - 1, val >> 8, ra);
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}
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break;
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case 2:
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cpu_stw_data_ra(env, addr - 2, val >> 16, ra);
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break;
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case 1:
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cpu_stb_data_ra(env, addr - 1, val >> 24, ra);
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break;
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default:
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/* Nothing is stored, but protection is checked and the
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cacheline is marked dirty. */
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#ifndef CONFIG_USER_ONLY
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probe_write(env, addr, 0, cpu_mmu_index(env, 0), ra);
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#endif
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break;
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}
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}
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void HELPER(stby_e)(CPUHPPAState *env, target_ulong addr, target_ureg val)
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{
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do_stby_e(env, addr, val, false);
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}
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void HELPER(stby_e_parallel)(CPUHPPAState *env, target_ulong addr,
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target_ureg val)
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{
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do_stby_e(env, addr, val, true);
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}
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target_ureg HELPER(probe_r)(target_ulong addr)
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{
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#ifdef CONFIG_USER_ONLY
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return page_check_range(addr, 1, PAGE_READ);
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#else
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return 1; /* FIXME */
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#endif
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}
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target_ureg HELPER(probe_w)(target_ulong addr)
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{
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#ifdef CONFIG_USER_ONLY
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return page_check_range(addr, 1, PAGE_WRITE);
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#else
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return 1; /* FIXME */
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#endif
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}
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void HELPER(loaded_fr0)(CPUHPPAState *env)
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{
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uint32_t shadow = env->fr[0] >> 32;
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int rm, d;
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env->fr0_shadow = shadow;
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switch (extract32(shadow, 9, 2)) {
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default:
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rm = float_round_nearest_even;
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break;
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case 1:
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rm = float_round_to_zero;
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break;
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case 2:
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rm = float_round_up;
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break;
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case 3:
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rm = float_round_down;
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break;
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}
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set_float_rounding_mode(rm, &env->fp_status);
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d = extract32(shadow, 5, 1);
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set_flush_to_zero(d, &env->fp_status);
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set_flush_inputs_to_zero(d, &env->fp_status);
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}
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void cpu_hppa_loaded_fr0(CPUHPPAState *env)
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{
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helper_loaded_fr0(env);
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}
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#define CONVERT_BIT(X, SRC, DST) \
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((SRC) > (DST) \
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? (X) / ((SRC) / (DST)) & (DST) \
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: ((X) & (SRC)) * ((DST) / (SRC)))
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static void update_fr0_op(CPUHPPAState *env, uintptr_t ra)
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{
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uint32_t soft_exp = get_float_exception_flags(&env->fp_status);
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uint32_t hard_exp = 0;
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uint32_t shadow = env->fr0_shadow;
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if (likely(soft_exp == 0)) {
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env->fr[0] = (uint64_t)shadow << 32;
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return;
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}
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set_float_exception_flags(0, &env->fp_status);
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hard_exp |= CONVERT_BIT(soft_exp, float_flag_inexact, 1u << 0);
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hard_exp |= CONVERT_BIT(soft_exp, float_flag_underflow, 1u << 1);
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hard_exp |= CONVERT_BIT(soft_exp, float_flag_overflow, 1u << 2);
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hard_exp |= CONVERT_BIT(soft_exp, float_flag_divbyzero, 1u << 3);
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hard_exp |= CONVERT_BIT(soft_exp, float_flag_invalid, 1u << 4);
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shadow |= hard_exp << (32 - 5);
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env->fr0_shadow = shadow;
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env->fr[0] = (uint64_t)shadow << 32;
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if (hard_exp & shadow) {
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dynexcp(env, EXCP_ASSIST, ra);
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}
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}
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float32 HELPER(fsqrt_s)(CPUHPPAState *env, float32 arg)
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{
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float32 ret = float32_sqrt(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float32 HELPER(frnd_s)(CPUHPPAState *env, float32 arg)
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{
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float32 ret = float32_round_to_int(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float32 HELPER(fadd_s)(CPUHPPAState *env, float32 a, float32 b)
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{
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float32 ret = float32_add(a, b, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float32 HELPER(fsub_s)(CPUHPPAState *env, float32 a, float32 b)
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{
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float32 ret = float32_sub(a, b, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float32 HELPER(fmpy_s)(CPUHPPAState *env, float32 a, float32 b)
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{
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float32 ret = float32_mul(a, b, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float32 HELPER(fdiv_s)(CPUHPPAState *env, float32 a, float32 b)
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{
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float32 ret = float32_div(a, b, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float64 HELPER(fsqrt_d)(CPUHPPAState *env, float64 arg)
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{
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float64 ret = float64_sqrt(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float64 HELPER(frnd_d)(CPUHPPAState *env, float64 arg)
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{
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float64 ret = float64_round_to_int(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float64 HELPER(fadd_d)(CPUHPPAState *env, float64 a, float64 b)
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{
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float64 ret = float64_add(a, b, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float64 HELPER(fsub_d)(CPUHPPAState *env, float64 a, float64 b)
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{
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float64 ret = float64_sub(a, b, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float64 HELPER(fmpy_d)(CPUHPPAState *env, float64 a, float64 b)
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{
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float64 ret = float64_mul(a, b, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float64 HELPER(fdiv_d)(CPUHPPAState *env, float64 a, float64 b)
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{
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float64 ret = float64_div(a, b, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float64 HELPER(fcnv_s_d)(CPUHPPAState *env, float32 arg)
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{
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float64 ret = float32_to_float64(arg, &env->fp_status);
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ret = float64_maybe_silence_nan(ret, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float32 HELPER(fcnv_d_s)(CPUHPPAState *env, float64 arg)
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{
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float32 ret = float64_to_float32(arg, &env->fp_status);
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ret = float32_maybe_silence_nan(ret, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float32 HELPER(fcnv_w_s)(CPUHPPAState *env, int32_t arg)
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{
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float32 ret = int32_to_float32(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float32 HELPER(fcnv_dw_s)(CPUHPPAState *env, int64_t arg)
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{
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float32 ret = int64_to_float32(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float64 HELPER(fcnv_w_d)(CPUHPPAState *env, int32_t arg)
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{
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float64 ret = int32_to_float64(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float64 HELPER(fcnv_dw_d)(CPUHPPAState *env, int64_t arg)
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{
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float64 ret = int64_to_float64(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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int32_t HELPER(fcnv_s_w)(CPUHPPAState *env, float32 arg)
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{
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int32_t ret = float32_to_int32(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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int32_t HELPER(fcnv_d_w)(CPUHPPAState *env, float64 arg)
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{
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int32_t ret = float64_to_int32(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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int64_t HELPER(fcnv_s_dw)(CPUHPPAState *env, float32 arg)
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{
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int64_t ret = float32_to_int64(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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int64_t HELPER(fcnv_d_dw)(CPUHPPAState *env, float64 arg)
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{
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int64_t ret = float64_to_int64(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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int32_t HELPER(fcnv_t_s_w)(CPUHPPAState *env, float32 arg)
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{
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int32_t ret = float32_to_int32_round_to_zero(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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int32_t HELPER(fcnv_t_d_w)(CPUHPPAState *env, float64 arg)
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{
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int32_t ret = float64_to_int32_round_to_zero(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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int64_t HELPER(fcnv_t_s_dw)(CPUHPPAState *env, float32 arg)
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{
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int64_t ret = float32_to_int64_round_to_zero(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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int64_t HELPER(fcnv_t_d_dw)(CPUHPPAState *env, float64 arg)
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{
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int64_t ret = float64_to_int64_round_to_zero(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float32 HELPER(fcnv_uw_s)(CPUHPPAState *env, uint32_t arg)
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{
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float32 ret = uint32_to_float32(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float32 HELPER(fcnv_udw_s)(CPUHPPAState *env, uint64_t arg)
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{
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float32 ret = uint64_to_float32(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float64 HELPER(fcnv_uw_d)(CPUHPPAState *env, uint32_t arg)
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{
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float64 ret = uint32_to_float64(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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float64 HELPER(fcnv_udw_d)(CPUHPPAState *env, uint64_t arg)
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{
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float64 ret = uint64_to_float64(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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uint32_t HELPER(fcnv_s_uw)(CPUHPPAState *env, float32 arg)
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{
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uint32_t ret = float32_to_uint32(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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uint32_t HELPER(fcnv_d_uw)(CPUHPPAState *env, float64 arg)
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{
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uint32_t ret = float64_to_uint32(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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uint64_t HELPER(fcnv_s_udw)(CPUHPPAState *env, float32 arg)
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{
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uint64_t ret = float32_to_uint64(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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uint64_t HELPER(fcnv_d_udw)(CPUHPPAState *env, float64 arg)
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{
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uint64_t ret = float64_to_uint64(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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uint32_t HELPER(fcnv_t_s_uw)(CPUHPPAState *env, float32 arg)
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{
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uint32_t ret = float32_to_uint32_round_to_zero(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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uint32_t HELPER(fcnv_t_d_uw)(CPUHPPAState *env, float64 arg)
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{
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uint32_t ret = float64_to_uint32_round_to_zero(arg, &env->fp_status);
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update_fr0_op(env, GETPC());
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return ret;
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}
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uint64_t HELPER(fcnv_t_s_udw)(CPUHPPAState *env, float32 arg)
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{
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|
uint64_t ret = float32_to_uint64_round_to_zero(arg, &env->fp_status);
|
|
update_fr0_op(env, GETPC());
|
|
return ret;
|
|
}
|
|
|
|
uint64_t HELPER(fcnv_t_d_udw)(CPUHPPAState *env, float64 arg)
|
|
{
|
|
uint64_t ret = float64_to_uint64_round_to_zero(arg, &env->fp_status);
|
|
update_fr0_op(env, GETPC());
|
|
return ret;
|
|
}
|
|
|
|
static void update_fr0_cmp(CPUHPPAState *env, uint32_t y, uint32_t c, int r)
|
|
{
|
|
uint32_t shadow = env->fr0_shadow;
|
|
|
|
switch (r) {
|
|
case float_relation_greater:
|
|
c = extract32(c, 4, 1);
|
|
break;
|
|
case float_relation_less:
|
|
c = extract32(c, 3, 1);
|
|
break;
|
|
case float_relation_equal:
|
|
c = extract32(c, 2, 1);
|
|
break;
|
|
case float_relation_unordered:
|
|
c = extract32(c, 1, 1);
|
|
break;
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
|
|
if (y) {
|
|
/* targeted comparison */
|
|
/* set fpsr[ca[y - 1]] to current compare */
|
|
shadow = deposit32(shadow, 21 - (y - 1), 1, c);
|
|
} else {
|
|
/* queued comparison */
|
|
/* shift cq right by one place */
|
|
shadow = deposit32(shadow, 11, 10, extract32(shadow, 12, 10));
|
|
/* move fpsr[c] to fpsr[cq[0]] */
|
|
shadow = deposit32(shadow, 21, 1, extract32(shadow, 26, 1));
|
|
/* set fpsr[c] to current compare */
|
|
shadow = deposit32(shadow, 26, 1, c);
|
|
}
|
|
|
|
env->fr0_shadow = shadow;
|
|
env->fr[0] = (uint64_t)shadow << 32;
|
|
}
|
|
|
|
void HELPER(fcmp_s)(CPUHPPAState *env, float32 a, float32 b,
|
|
uint32_t y, uint32_t c)
|
|
{
|
|
int r;
|
|
if (c & 1) {
|
|
r = float32_compare(a, b, &env->fp_status);
|
|
} else {
|
|
r = float32_compare_quiet(a, b, &env->fp_status);
|
|
}
|
|
update_fr0_op(env, GETPC());
|
|
update_fr0_cmp(env, y, c, r);
|
|
}
|
|
|
|
void HELPER(fcmp_d)(CPUHPPAState *env, float64 a, float64 b,
|
|
uint32_t y, uint32_t c)
|
|
{
|
|
int r;
|
|
if (c & 1) {
|
|
r = float64_compare(a, b, &env->fp_status);
|
|
} else {
|
|
r = float64_compare_quiet(a, b, &env->fp_status);
|
|
}
|
|
update_fr0_op(env, GETPC());
|
|
update_fr0_cmp(env, y, c, r);
|
|
}
|
|
|
|
float32 HELPER(fmpyfadd_s)(CPUHPPAState *env, float32 a, float32 b, float32 c)
|
|
{
|
|
float32 ret = float32_muladd(a, b, c, 0, &env->fp_status);
|
|
update_fr0_op(env, GETPC());
|
|
return ret;
|
|
}
|
|
|
|
float32 HELPER(fmpynfadd_s)(CPUHPPAState *env, float32 a, float32 b, float32 c)
|
|
{
|
|
float32 ret = float32_muladd(a, b, c, float_muladd_negate_product,
|
|
&env->fp_status);
|
|
update_fr0_op(env, GETPC());
|
|
return ret;
|
|
}
|
|
|
|
float64 HELPER(fmpyfadd_d)(CPUHPPAState *env, float64 a, float64 b, float64 c)
|
|
{
|
|
float64 ret = float64_muladd(a, b, c, 0, &env->fp_status);
|
|
update_fr0_op(env, GETPC());
|
|
return ret;
|
|
}
|
|
|
|
float64 HELPER(fmpynfadd_d)(CPUHPPAState *env, float64 a, float64 b, float64 c)
|
|
{
|
|
float64 ret = float64_muladd(a, b, c, float_muladd_negate_product,
|
|
&env->fp_status);
|
|
update_fr0_op(env, GETPC());
|
|
return ret;
|
|
}
|
|
|
|
#ifndef CONFIG_USER_ONLY
|
|
target_ureg HELPER(swap_system_mask)(CPUHPPAState *env, target_ureg nsm)
|
|
{
|
|
target_ulong psw = env->psw;
|
|
/* ??? On second reading this condition simply seems
|
|
to be undefined rather than a diagnosed trap. */
|
|
if (nsm & ~psw & PSW_Q) {
|
|
dynexcp(env, EXCP_ILL, GETPC());
|
|
}
|
|
env->psw = (psw & ~PSW_SM) | (nsm & PSW_SM);
|
|
return psw & PSW_SM;
|
|
}
|
|
|
|
void HELPER(rfi)(CPUHPPAState *env)
|
|
{
|
|
/* ??? On second reading this condition simply seems
|
|
to be undefined rather than a diagnosed trap. */
|
|
if (env->psw & (PSW_I | PSW_R | PSW_Q)) {
|
|
helper_excp(env, EXCP_ILL);
|
|
}
|
|
env->iaoq_f = env->cr[CR_IIAOQ];
|
|
env->iaoq_b = env->cr_back[1];
|
|
cpu_hppa_put_psw(env, env->cr[CR_IPSW]);
|
|
}
|
|
|
|
void HELPER(rfi_r)(CPUHPPAState *env)
|
|
{
|
|
env->gr[1] = env->shadow[0];
|
|
env->gr[8] = env->shadow[1];
|
|
env->gr[9] = env->shadow[2];
|
|
env->gr[16] = env->shadow[3];
|
|
env->gr[17] = env->shadow[4];
|
|
env->gr[24] = env->shadow[5];
|
|
env->gr[25] = env->shadow[6];
|
|
helper_rfi(env);
|
|
}
|
|
#endif
|