5650b5497e
There is no "version 2" of the "Lesser" General Public License. It is either "GPL version 2.0" or "Lesser GPL version 2.1". This patch replaces all occurrences of "Lesser GPL version 2" with "Lesser GPL version 2.1" in comment section. Signed-off-by: Chetan Pant <chetan4windows@gmail.com> Message-Id: <20201023124235.20130-1-chetan4windows@gmail.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Thomas Huth <thuth@redhat.com>
472 lines
11 KiB
C
472 lines
11 KiB
C
/*
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* Helpers for lazy condition code handling
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*
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* Copyright (c) 2003-2005 Fabrice Bellard
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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 2.1 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/helper-proto.h"
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static uint32_t compute_all_flags(CPUSPARCState *env)
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{
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return env->psr & PSR_ICC;
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}
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static uint32_t compute_C_flags(CPUSPARCState *env)
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{
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return env->psr & PSR_CARRY;
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}
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static inline uint32_t get_NZ_icc(int32_t dst)
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{
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uint32_t ret = 0;
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if (dst == 0) {
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ret = PSR_ZERO;
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} else if (dst < 0) {
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ret = PSR_NEG;
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}
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return ret;
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}
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#ifdef TARGET_SPARC64
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static uint32_t compute_all_flags_xcc(CPUSPARCState *env)
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{
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return env->xcc & PSR_ICC;
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}
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static uint32_t compute_C_flags_xcc(CPUSPARCState *env)
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{
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return env->xcc & PSR_CARRY;
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}
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static inline uint32_t get_NZ_xcc(target_long dst)
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{
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uint32_t ret = 0;
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if (!dst) {
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ret = PSR_ZERO;
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} else if (dst < 0) {
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ret = PSR_NEG;
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}
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return ret;
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}
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#endif
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static inline uint32_t get_V_div_icc(target_ulong src2)
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{
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uint32_t ret = 0;
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if (src2 != 0) {
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ret = PSR_OVF;
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}
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return ret;
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}
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static uint32_t compute_all_div(CPUSPARCState *env)
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{
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uint32_t ret;
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ret = get_NZ_icc(CC_DST);
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ret |= get_V_div_icc(CC_SRC2);
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return ret;
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}
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static uint32_t compute_C_div(CPUSPARCState *env)
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{
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return 0;
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}
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static inline uint32_t get_C_add_icc(uint32_t dst, uint32_t src1)
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{
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uint32_t ret = 0;
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if (dst < src1) {
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ret = PSR_CARRY;
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}
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return ret;
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}
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static inline uint32_t get_C_addx_icc(uint32_t dst, uint32_t src1,
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uint32_t src2)
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{
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uint32_t ret = 0;
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if (((src1 & src2) | (~dst & (src1 | src2))) & (1U << 31)) {
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ret = PSR_CARRY;
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}
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return ret;
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}
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static inline uint32_t get_V_add_icc(uint32_t dst, uint32_t src1,
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uint32_t src2)
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{
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uint32_t ret = 0;
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if (((src1 ^ src2 ^ -1) & (src1 ^ dst)) & (1U << 31)) {
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ret = PSR_OVF;
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}
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return ret;
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}
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#ifdef TARGET_SPARC64
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static inline uint32_t get_C_add_xcc(target_ulong dst, target_ulong src1)
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{
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uint32_t ret = 0;
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if (dst < src1) {
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ret = PSR_CARRY;
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}
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return ret;
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}
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static inline uint32_t get_C_addx_xcc(target_ulong dst, target_ulong src1,
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target_ulong src2)
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{
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uint32_t ret = 0;
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if (((src1 & src2) | (~dst & (src1 | src2))) & (1ULL << 63)) {
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ret = PSR_CARRY;
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}
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return ret;
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}
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static inline uint32_t get_V_add_xcc(target_ulong dst, target_ulong src1,
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target_ulong src2)
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{
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uint32_t ret = 0;
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if (((src1 ^ src2 ^ -1) & (src1 ^ dst)) & (1ULL << 63)) {
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ret = PSR_OVF;
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}
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return ret;
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}
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static uint32_t compute_all_add_xcc(CPUSPARCState *env)
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{
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uint32_t ret;
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ret = get_NZ_xcc(CC_DST);
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ret |= get_C_add_xcc(CC_DST, CC_SRC);
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ret |= get_V_add_xcc(CC_DST, CC_SRC, CC_SRC2);
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return ret;
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}
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static uint32_t compute_C_add_xcc(CPUSPARCState *env)
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{
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return get_C_add_xcc(CC_DST, CC_SRC);
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}
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#endif
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static uint32_t compute_all_add(CPUSPARCState *env)
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{
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uint32_t ret;
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ret = get_NZ_icc(CC_DST);
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ret |= get_C_add_icc(CC_DST, CC_SRC);
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ret |= get_V_add_icc(CC_DST, CC_SRC, CC_SRC2);
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return ret;
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}
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static uint32_t compute_C_add(CPUSPARCState *env)
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{
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return get_C_add_icc(CC_DST, CC_SRC);
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}
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#ifdef TARGET_SPARC64
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static uint32_t compute_all_addx_xcc(CPUSPARCState *env)
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{
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uint32_t ret;
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ret = get_NZ_xcc(CC_DST);
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ret |= get_C_addx_xcc(CC_DST, CC_SRC, CC_SRC2);
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ret |= get_V_add_xcc(CC_DST, CC_SRC, CC_SRC2);
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return ret;
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}
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static uint32_t compute_C_addx_xcc(CPUSPARCState *env)
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{
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return get_C_addx_xcc(CC_DST, CC_SRC, CC_SRC2);
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}
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#endif
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static uint32_t compute_all_addx(CPUSPARCState *env)
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{
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uint32_t ret;
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ret = get_NZ_icc(CC_DST);
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ret |= get_C_addx_icc(CC_DST, CC_SRC, CC_SRC2);
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ret |= get_V_add_icc(CC_DST, CC_SRC, CC_SRC2);
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return ret;
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}
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static uint32_t compute_C_addx(CPUSPARCState *env)
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{
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return get_C_addx_icc(CC_DST, CC_SRC, CC_SRC2);
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}
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static inline uint32_t get_V_tag_icc(target_ulong src1, target_ulong src2)
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{
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uint32_t ret = 0;
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if ((src1 | src2) & 0x3) {
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ret = PSR_OVF;
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}
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return ret;
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}
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static uint32_t compute_all_tadd(CPUSPARCState *env)
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{
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uint32_t ret;
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ret = get_NZ_icc(CC_DST);
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ret |= get_C_add_icc(CC_DST, CC_SRC);
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ret |= get_V_add_icc(CC_DST, CC_SRC, CC_SRC2);
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ret |= get_V_tag_icc(CC_SRC, CC_SRC2);
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return ret;
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}
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static uint32_t compute_all_taddtv(CPUSPARCState *env)
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{
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uint32_t ret;
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ret = get_NZ_icc(CC_DST);
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ret |= get_C_add_icc(CC_DST, CC_SRC);
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return ret;
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}
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static inline uint32_t get_C_sub_icc(uint32_t src1, uint32_t src2)
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{
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uint32_t ret = 0;
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if (src1 < src2) {
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ret = PSR_CARRY;
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}
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return ret;
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}
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static inline uint32_t get_C_subx_icc(uint32_t dst, uint32_t src1,
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uint32_t src2)
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{
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uint32_t ret = 0;
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if (((~src1 & src2) | (dst & (~src1 | src2))) & (1U << 31)) {
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ret = PSR_CARRY;
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}
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return ret;
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}
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static inline uint32_t get_V_sub_icc(uint32_t dst, uint32_t src1,
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uint32_t src2)
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{
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uint32_t ret = 0;
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if (((src1 ^ src2) & (src1 ^ dst)) & (1U << 31)) {
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ret = PSR_OVF;
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}
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return ret;
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}
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#ifdef TARGET_SPARC64
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static inline uint32_t get_C_sub_xcc(target_ulong src1, target_ulong src2)
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{
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uint32_t ret = 0;
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if (src1 < src2) {
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ret = PSR_CARRY;
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}
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return ret;
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}
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static inline uint32_t get_C_subx_xcc(target_ulong dst, target_ulong src1,
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target_ulong src2)
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{
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uint32_t ret = 0;
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if (((~src1 & src2) | (dst & (~src1 | src2))) & (1ULL << 63)) {
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ret = PSR_CARRY;
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}
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return ret;
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}
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static inline uint32_t get_V_sub_xcc(target_ulong dst, target_ulong src1,
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target_ulong src2)
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{
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uint32_t ret = 0;
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if (((src1 ^ src2) & (src1 ^ dst)) & (1ULL << 63)) {
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ret = PSR_OVF;
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}
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return ret;
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}
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static uint32_t compute_all_sub_xcc(CPUSPARCState *env)
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{
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uint32_t ret;
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ret = get_NZ_xcc(CC_DST);
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ret |= get_C_sub_xcc(CC_SRC, CC_SRC2);
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ret |= get_V_sub_xcc(CC_DST, CC_SRC, CC_SRC2);
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return ret;
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}
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static uint32_t compute_C_sub_xcc(CPUSPARCState *env)
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{
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return get_C_sub_xcc(CC_SRC, CC_SRC2);
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}
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#endif
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static uint32_t compute_all_sub(CPUSPARCState *env)
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{
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uint32_t ret;
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ret = get_NZ_icc(CC_DST);
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ret |= get_C_sub_icc(CC_SRC, CC_SRC2);
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ret |= get_V_sub_icc(CC_DST, CC_SRC, CC_SRC2);
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return ret;
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}
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static uint32_t compute_C_sub(CPUSPARCState *env)
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{
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return get_C_sub_icc(CC_SRC, CC_SRC2);
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}
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#ifdef TARGET_SPARC64
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static uint32_t compute_all_subx_xcc(CPUSPARCState *env)
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{
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uint32_t ret;
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ret = get_NZ_xcc(CC_DST);
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ret |= get_C_subx_xcc(CC_DST, CC_SRC, CC_SRC2);
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ret |= get_V_sub_xcc(CC_DST, CC_SRC, CC_SRC2);
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return ret;
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}
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static uint32_t compute_C_subx_xcc(CPUSPARCState *env)
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{
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return get_C_subx_xcc(CC_DST, CC_SRC, CC_SRC2);
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}
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#endif
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static uint32_t compute_all_subx(CPUSPARCState *env)
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{
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uint32_t ret;
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ret = get_NZ_icc(CC_DST);
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ret |= get_C_subx_icc(CC_DST, CC_SRC, CC_SRC2);
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ret |= get_V_sub_icc(CC_DST, CC_SRC, CC_SRC2);
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return ret;
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}
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static uint32_t compute_C_subx(CPUSPARCState *env)
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{
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return get_C_subx_icc(CC_DST, CC_SRC, CC_SRC2);
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}
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static uint32_t compute_all_tsub(CPUSPARCState *env)
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{
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uint32_t ret;
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ret = get_NZ_icc(CC_DST);
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ret |= get_C_sub_icc(CC_SRC, CC_SRC2);
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ret |= get_V_sub_icc(CC_DST, CC_SRC, CC_SRC2);
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ret |= get_V_tag_icc(CC_SRC, CC_SRC2);
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return ret;
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}
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static uint32_t compute_all_tsubtv(CPUSPARCState *env)
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{
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uint32_t ret;
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ret = get_NZ_icc(CC_DST);
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ret |= get_C_sub_icc(CC_SRC, CC_SRC2);
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return ret;
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}
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static uint32_t compute_all_logic(CPUSPARCState *env)
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{
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return get_NZ_icc(CC_DST);
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}
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static uint32_t compute_C_logic(CPUSPARCState *env)
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{
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return 0;
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}
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#ifdef TARGET_SPARC64
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static uint32_t compute_all_logic_xcc(CPUSPARCState *env)
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{
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return get_NZ_xcc(CC_DST);
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}
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#endif
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typedef struct CCTable {
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uint32_t (*compute_all)(CPUSPARCState *env); /* return all the flags */
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uint32_t (*compute_c)(CPUSPARCState *env); /* return the C flag */
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} CCTable;
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static const CCTable icc_table[CC_OP_NB] = {
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/* CC_OP_DYNAMIC should never happen */
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[CC_OP_FLAGS] = { compute_all_flags, compute_C_flags },
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[CC_OP_DIV] = { compute_all_div, compute_C_div },
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[CC_OP_ADD] = { compute_all_add, compute_C_add },
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[CC_OP_ADDX] = { compute_all_addx, compute_C_addx },
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[CC_OP_TADD] = { compute_all_tadd, compute_C_add },
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[CC_OP_TADDTV] = { compute_all_taddtv, compute_C_add },
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[CC_OP_SUB] = { compute_all_sub, compute_C_sub },
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[CC_OP_SUBX] = { compute_all_subx, compute_C_subx },
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[CC_OP_TSUB] = { compute_all_tsub, compute_C_sub },
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[CC_OP_TSUBTV] = { compute_all_tsubtv, compute_C_sub },
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[CC_OP_LOGIC] = { compute_all_logic, compute_C_logic },
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};
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#ifdef TARGET_SPARC64
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static const CCTable xcc_table[CC_OP_NB] = {
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/* CC_OP_DYNAMIC should never happen */
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[CC_OP_FLAGS] = { compute_all_flags_xcc, compute_C_flags_xcc },
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[CC_OP_DIV] = { compute_all_logic_xcc, compute_C_logic },
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[CC_OP_ADD] = { compute_all_add_xcc, compute_C_add_xcc },
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[CC_OP_ADDX] = { compute_all_addx_xcc, compute_C_addx_xcc },
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[CC_OP_TADD] = { compute_all_add_xcc, compute_C_add_xcc },
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[CC_OP_TADDTV] = { compute_all_add_xcc, compute_C_add_xcc },
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[CC_OP_SUB] = { compute_all_sub_xcc, compute_C_sub_xcc },
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[CC_OP_SUBX] = { compute_all_subx_xcc, compute_C_subx_xcc },
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[CC_OP_TSUB] = { compute_all_sub_xcc, compute_C_sub_xcc },
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[CC_OP_TSUBTV] = { compute_all_sub_xcc, compute_C_sub_xcc },
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[CC_OP_LOGIC] = { compute_all_logic_xcc, compute_C_logic },
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};
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#endif
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void helper_compute_psr(CPUSPARCState *env)
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{
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uint32_t new_psr;
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new_psr = icc_table[CC_OP].compute_all(env);
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env->psr = new_psr;
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#ifdef TARGET_SPARC64
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new_psr = xcc_table[CC_OP].compute_all(env);
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env->xcc = new_psr;
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#endif
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CC_OP = CC_OP_FLAGS;
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}
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uint32_t helper_compute_C_icc(CPUSPARCState *env)
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{
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return icc_table[CC_OP].compute_c(env) >> PSR_CARRY_SHIFT;
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}
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