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-rw-r--r--target/sparc/cc_helper.c471
1 files changed, 471 insertions, 0 deletions
diff --git a/target/sparc/cc_helper.c b/target/sparc/cc_helper.c
new file mode 100644
index 0000000000..a410a0b98f
--- /dev/null
+++ b/target/sparc/cc_helper.c
@@ -0,0 +1,471 @@
+/*
+ * Helpers for lazy condition code handling
+ *
+ * Copyright (c) 2003-2005 Fabrice Bellard
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+#include "cpu.h"
+#include "exec/helper-proto.h"
+
+static uint32_t compute_all_flags(CPUSPARCState *env)
+{
+ return env->psr & PSR_ICC;
+}
+
+static uint32_t compute_C_flags(CPUSPARCState *env)
+{
+ return env->psr & PSR_CARRY;
+}
+
+static inline uint32_t get_NZ_icc(int32_t dst)
+{
+ uint32_t ret = 0;
+
+ if (dst == 0) {
+ ret = PSR_ZERO;
+ } else if (dst < 0) {
+ ret = PSR_NEG;
+ }
+ return ret;
+}
+
+#ifdef TARGET_SPARC64
+static uint32_t compute_all_flags_xcc(CPUSPARCState *env)
+{
+ return env->xcc & PSR_ICC;
+}
+
+static uint32_t compute_C_flags_xcc(CPUSPARCState *env)
+{
+ return env->xcc & PSR_CARRY;
+}
+
+static inline uint32_t get_NZ_xcc(target_long dst)
+{
+ uint32_t ret = 0;
+
+ if (!dst) {
+ ret = PSR_ZERO;
+ } else if (dst < 0) {
+ ret = PSR_NEG;
+ }
+ return ret;
+}
+#endif
+
+static inline uint32_t get_V_div_icc(target_ulong src2)
+{
+ uint32_t ret = 0;
+
+ if (src2 != 0) {
+ ret = PSR_OVF;
+ }
+ return ret;
+}
+
+static uint32_t compute_all_div(CPUSPARCState *env)
+{
+ uint32_t ret;
+
+ ret = get_NZ_icc(CC_DST);
+ ret |= get_V_div_icc(CC_SRC2);
+ return ret;
+}
+
+static uint32_t compute_C_div(CPUSPARCState *env)
+{
+ return 0;
+}
+
+static inline uint32_t get_C_add_icc(uint32_t dst, uint32_t src1)
+{
+ uint32_t ret = 0;
+
+ if (dst < src1) {
+ ret = PSR_CARRY;
+ }
+ return ret;
+}
+
+static inline uint32_t get_C_addx_icc(uint32_t dst, uint32_t src1,
+ uint32_t src2)
+{
+ uint32_t ret = 0;
+
+ if (((src1 & src2) | (~dst & (src1 | src2))) & (1U << 31)) {
+ ret = PSR_CARRY;
+ }
+ return ret;
+}
+
+static inline uint32_t get_V_add_icc(uint32_t dst, uint32_t src1,
+ uint32_t src2)
+{
+ uint32_t ret = 0;
+
+ if (((src1 ^ src2 ^ -1) & (src1 ^ dst)) & (1U << 31)) {
+ ret = PSR_OVF;
+ }
+ return ret;
+}
+
+#ifdef TARGET_SPARC64
+static inline uint32_t get_C_add_xcc(target_ulong dst, target_ulong src1)
+{
+ uint32_t ret = 0;
+
+ if (dst < src1) {
+ ret = PSR_CARRY;
+ }
+ return ret;
+}
+
+static inline uint32_t get_C_addx_xcc(target_ulong dst, target_ulong src1,
+ target_ulong src2)
+{
+ uint32_t ret = 0;
+
+ if (((src1 & src2) | (~dst & (src1 | src2))) & (1ULL << 63)) {
+ ret = PSR_CARRY;
+ }
+ return ret;
+}
+
+static inline uint32_t get_V_add_xcc(target_ulong dst, target_ulong src1,
+ target_ulong src2)
+{
+ uint32_t ret = 0;
+
+ if (((src1 ^ src2 ^ -1) & (src1 ^ dst)) & (1ULL << 63)) {
+ ret = PSR_OVF;
+ }
+ return ret;
+}
+
+static uint32_t compute_all_add_xcc(CPUSPARCState *env)
+{
+ uint32_t ret;
+
+ ret = get_NZ_xcc(CC_DST);
+ ret |= get_C_add_xcc(CC_DST, CC_SRC);
+ ret |= get_V_add_xcc(CC_DST, CC_SRC, CC_SRC2);
+ return ret;
+}
+
+static uint32_t compute_C_add_xcc(CPUSPARCState *env)
+{
+ return get_C_add_xcc(CC_DST, CC_SRC);
+}
+#endif
+
+static uint32_t compute_all_add(CPUSPARCState *env)
+{
+ uint32_t ret;
+
+ ret = get_NZ_icc(CC_DST);
+ ret |= get_C_add_icc(CC_DST, CC_SRC);
+ ret |= get_V_add_icc(CC_DST, CC_SRC, CC_SRC2);
+ return ret;
+}
+
+static uint32_t compute_C_add(CPUSPARCState *env)
+{
+ return get_C_add_icc(CC_DST, CC_SRC);
+}
+
+#ifdef TARGET_SPARC64
+static uint32_t compute_all_addx_xcc(CPUSPARCState *env)
+{
+ uint32_t ret;
+
+ ret = get_NZ_xcc(CC_DST);
+ ret |= get_C_addx_xcc(CC_DST, CC_SRC, CC_SRC2);
+ ret |= get_V_add_xcc(CC_DST, CC_SRC, CC_SRC2);
+ return ret;
+}
+
+static uint32_t compute_C_addx_xcc(CPUSPARCState *env)
+{
+ return get_C_addx_xcc(CC_DST, CC_SRC, CC_SRC2);
+}
+#endif
+
+static uint32_t compute_all_addx(CPUSPARCState *env)
+{
+ uint32_t ret;
+
+ ret = get_NZ_icc(CC_DST);
+ ret |= get_C_addx_icc(CC_DST, CC_SRC, CC_SRC2);
+ ret |= get_V_add_icc(CC_DST, CC_SRC, CC_SRC2);
+ return ret;
+}
+
+static uint32_t compute_C_addx(CPUSPARCState *env)
+{
+ return get_C_addx_icc(CC_DST, CC_SRC, CC_SRC2);
+}
+
+static inline uint32_t get_V_tag_icc(target_ulong src1, target_ulong src2)
+{
+ uint32_t ret = 0;
+
+ if ((src1 | src2) & 0x3) {
+ ret = PSR_OVF;
+ }
+ return ret;
+}
+
+static uint32_t compute_all_tadd(CPUSPARCState *env)
+{
+ uint32_t ret;
+
+ ret = get_NZ_icc(CC_DST);
+ ret |= get_C_add_icc(CC_DST, CC_SRC);
+ ret |= get_V_add_icc(CC_DST, CC_SRC, CC_SRC2);
+ ret |= get_V_tag_icc(CC_SRC, CC_SRC2);
+ return ret;
+}
+
+static uint32_t compute_all_taddtv(CPUSPARCState *env)
+{
+ uint32_t ret;
+
+ ret = get_NZ_icc(CC_DST);
+ ret |= get_C_add_icc(CC_DST, CC_SRC);
+ return ret;
+}
+
+static inline uint32_t get_C_sub_icc(uint32_t src1, uint32_t src2)
+{
+ uint32_t ret = 0;
+
+ if (src1 < src2) {
+ ret = PSR_CARRY;
+ }
+ return ret;
+}
+
+static inline uint32_t get_C_subx_icc(uint32_t dst, uint32_t src1,
+ uint32_t src2)
+{
+ uint32_t ret = 0;
+
+ if (((~src1 & src2) | (dst & (~src1 | src2))) & (1U << 31)) {
+ ret = PSR_CARRY;
+ }
+ return ret;
+}
+
+static inline uint32_t get_V_sub_icc(uint32_t dst, uint32_t src1,
+ uint32_t src2)
+{
+ uint32_t ret = 0;
+
+ if (((src1 ^ src2) & (src1 ^ dst)) & (1U << 31)) {
+ ret = PSR_OVF;
+ }
+ return ret;
+}
+
+
+#ifdef TARGET_SPARC64
+static inline uint32_t get_C_sub_xcc(target_ulong src1, target_ulong src2)
+{
+ uint32_t ret = 0;
+
+ if (src1 < src2) {
+ ret = PSR_CARRY;
+ }
+ return ret;
+}
+
+static inline uint32_t get_C_subx_xcc(target_ulong dst, target_ulong src1,
+ target_ulong src2)
+{
+ uint32_t ret = 0;
+
+ if (((~src1 & src2) | (dst & (~src1 | src2))) & (1ULL << 63)) {
+ ret = PSR_CARRY;
+ }
+ return ret;
+}
+
+static inline uint32_t get_V_sub_xcc(target_ulong dst, target_ulong src1,
+ target_ulong src2)
+{
+ uint32_t ret = 0;
+
+ if (((src1 ^ src2) & (src1 ^ dst)) & (1ULL << 63)) {
+ ret = PSR_OVF;
+ }
+ return ret;
+}
+
+static uint32_t compute_all_sub_xcc(CPUSPARCState *env)
+{
+ uint32_t ret;
+
+ ret = get_NZ_xcc(CC_DST);
+ ret |= get_C_sub_xcc(CC_SRC, CC_SRC2);
+ ret |= get_V_sub_xcc(CC_DST, CC_SRC, CC_SRC2);
+ return ret;
+}
+
+static uint32_t compute_C_sub_xcc(CPUSPARCState *env)
+{
+ return get_C_sub_xcc(CC_SRC, CC_SRC2);
+}
+#endif
+
+static uint32_t compute_all_sub(CPUSPARCState *env)
+{
+ uint32_t ret;
+
+ ret = get_NZ_icc(CC_DST);
+ ret |= get_C_sub_icc(CC_SRC, CC_SRC2);
+ ret |= get_V_sub_icc(CC_DST, CC_SRC, CC_SRC2);
+ return ret;
+}
+
+static uint32_t compute_C_sub(CPUSPARCState *env)
+{
+ return get_C_sub_icc(CC_SRC, CC_SRC2);
+}
+
+#ifdef TARGET_SPARC64
+static uint32_t compute_all_subx_xcc(CPUSPARCState *env)
+{
+ uint32_t ret;
+
+ ret = get_NZ_xcc(CC_DST);
+ ret |= get_C_subx_xcc(CC_DST, CC_SRC, CC_SRC2);
+ ret |= get_V_sub_xcc(CC_DST, CC_SRC, CC_SRC2);
+ return ret;
+}
+
+static uint32_t compute_C_subx_xcc(CPUSPARCState *env)
+{
+ return get_C_subx_xcc(CC_DST, CC_SRC, CC_SRC2);
+}
+#endif
+
+static uint32_t compute_all_subx(CPUSPARCState *env)
+{
+ uint32_t ret;
+
+ ret = get_NZ_icc(CC_DST);
+ ret |= get_C_subx_icc(CC_DST, CC_SRC, CC_SRC2);
+ ret |= get_V_sub_icc(CC_DST, CC_SRC, CC_SRC2);
+ return ret;
+}
+
+static uint32_t compute_C_subx(CPUSPARCState *env)
+{
+ return get_C_subx_icc(CC_DST, CC_SRC, CC_SRC2);
+}
+
+static uint32_t compute_all_tsub(CPUSPARCState *env)
+{
+ uint32_t ret;
+
+ ret = get_NZ_icc(CC_DST);
+ ret |= get_C_sub_icc(CC_SRC, CC_SRC2);
+ ret |= get_V_sub_icc(CC_DST, CC_SRC, CC_SRC2);
+ ret |= get_V_tag_icc(CC_SRC, CC_SRC2);
+ return ret;
+}
+
+static uint32_t compute_all_tsubtv(CPUSPARCState *env)
+{
+ uint32_t ret;
+
+ ret = get_NZ_icc(CC_DST);
+ ret |= get_C_sub_icc(CC_SRC, CC_SRC2);
+ return ret;
+}
+
+static uint32_t compute_all_logic(CPUSPARCState *env)
+{
+ return get_NZ_icc(CC_DST);
+}
+
+static uint32_t compute_C_logic(CPUSPARCState *env)
+{
+ return 0;
+}
+
+#ifdef TARGET_SPARC64
+static uint32_t compute_all_logic_xcc(CPUSPARCState *env)
+{
+ return get_NZ_xcc(CC_DST);
+}
+#endif
+
+typedef struct CCTable {
+ uint32_t (*compute_all)(CPUSPARCState *env); /* return all the flags */
+ uint32_t (*compute_c)(CPUSPARCState *env); /* return the C flag */
+} CCTable;
+
+static const CCTable icc_table[CC_OP_NB] = {
+ /* CC_OP_DYNAMIC should never happen */
+ [CC_OP_FLAGS] = { compute_all_flags, compute_C_flags },
+ [CC_OP_DIV] = { compute_all_div, compute_C_div },
+ [CC_OP_ADD] = { compute_all_add, compute_C_add },
+ [CC_OP_ADDX] = { compute_all_addx, compute_C_addx },
+ [CC_OP_TADD] = { compute_all_tadd, compute_C_add },
+ [CC_OP_TADDTV] = { compute_all_taddtv, compute_C_add },
+ [CC_OP_SUB] = { compute_all_sub, compute_C_sub },
+ [CC_OP_SUBX] = { compute_all_subx, compute_C_subx },
+ [CC_OP_TSUB] = { compute_all_tsub, compute_C_sub },
+ [CC_OP_TSUBTV] = { compute_all_tsubtv, compute_C_sub },
+ [CC_OP_LOGIC] = { compute_all_logic, compute_C_logic },
+};
+
+#ifdef TARGET_SPARC64
+static const CCTable xcc_table[CC_OP_NB] = {
+ /* CC_OP_DYNAMIC should never happen */
+ [CC_OP_FLAGS] = { compute_all_flags_xcc, compute_C_flags_xcc },
+ [CC_OP_DIV] = { compute_all_logic_xcc, compute_C_logic },
+ [CC_OP_ADD] = { compute_all_add_xcc, compute_C_add_xcc },
+ [CC_OP_ADDX] = { compute_all_addx_xcc, compute_C_addx_xcc },
+ [CC_OP_TADD] = { compute_all_add_xcc, compute_C_add_xcc },
+ [CC_OP_TADDTV] = { compute_all_add_xcc, compute_C_add_xcc },
+ [CC_OP_SUB] = { compute_all_sub_xcc, compute_C_sub_xcc },
+ [CC_OP_SUBX] = { compute_all_subx_xcc, compute_C_subx_xcc },
+ [CC_OP_TSUB] = { compute_all_sub_xcc, compute_C_sub_xcc },
+ [CC_OP_TSUBTV] = { compute_all_sub_xcc, compute_C_sub_xcc },
+ [CC_OP_LOGIC] = { compute_all_logic_xcc, compute_C_logic },
+};
+#endif
+
+void helper_compute_psr(CPUSPARCState *env)
+{
+ uint32_t new_psr;
+
+ new_psr = icc_table[CC_OP].compute_all(env);
+ env->psr = new_psr;
+#ifdef TARGET_SPARC64
+ new_psr = xcc_table[CC_OP].compute_all(env);
+ env->xcc = new_psr;
+#endif
+ CC_OP = CC_OP_FLAGS;
+}
+
+uint32_t helper_compute_C_icc(CPUSPARCState *env)
+{
+ return icc_table[CC_OP].compute_c(env) >> PSR_CARRY_SHIFT;
+}
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-02 08:08:53 +0000