diff mbox series

[PULL,07/21] target/sparc: Remove CC_OP_TADDTV, CC_OP_TSUBTV

Message ID 20231105201222.202395-8-richard.henderson@linaro.org
State New
Headers show
Series [PULL,01/21] target/sparc: Introduce cpu_put_psr_icc | expand

Commit Message

Richard Henderson Nov. 5, 2023, 8:12 p.m. UTC 
Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Acked-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/sparc/cpu.h       |   2 -
 target/sparc/cc_helper.c | 190 +--------------------------------------
 target/sparc/helper.c    |  36 ++++++--
 target/sparc/translate.c |   4 +-
 4 files changed, 32 insertions(+), 200 deletions(-)
diff mbox series

Patch

diff --git a/target/sparc/cpu.h b/target/sparc/cpu.h
index 9884bd416a..a7999eaab5 100644
--- a/target/sparc/cpu.h
+++ b/target/sparc/cpu.h
@@ -150,8 +150,6 @@  enum {
 enum {
     CC_OP_DYNAMIC, /* must use dynamic code to get cc_op */
     CC_OP_FLAGS,   /* all cc are back in cc_*_[NZCV] registers */
-    CC_OP_TADDTV,  /* modify all flags except V, CC_DST = res, CC_SRC = src1 */
-    CC_OP_TSUBTV,  /* modify all flags except V, CC_DST = res, CC_SRC = src1 */
     CC_OP_NB,
 };
 
diff --git a/target/sparc/cc_helper.c b/target/sparc/cc_helper.c
index 20d451aa65..05f1479aea 100644
--- a/target/sparc/cc_helper.c
+++ b/target/sparc/cc_helper.c
@@ -21,198 +21,12 @@ 
 #include "cpu.h"
 #include "exec/helper-proto.h"
 
-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 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_C_add_icc(uint32_t dst, uint32_t src1)
-{
-    uint32_t ret = 0;
-
-    if (dst < src1) {
-        ret = PSR_CARRY;
-    }
-    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_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_C_add(CPUSPARCState *env)
-{
-    return get_C_add_icc(CC_DST, CC_SRC);
-}
-
-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;
-}
-
-#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_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_C_sub(CPUSPARCState *env)
-{
-    return get_C_sub_icc(CC_SRC, CC_SRC2);
-}
-
-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;
-}
-
-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_TADDTV] = { compute_all_taddtv, compute_C_add },
-    [CC_OP_TSUBTV] = { compute_all_tsubtv, compute_C_sub },
-};
-
-#ifdef TARGET_SPARC64
-static const CCTable xcc_table[CC_OP_NB] = {
-    /* CC_OP_DYNAMIC should never happen */
-    [CC_OP_TADDTV] = { compute_all_add_xcc, compute_C_add_xcc },
-    [CC_OP_TSUBTV] = { compute_all_sub_xcc, compute_C_sub_xcc },
-};
-#endif
-
 void helper_compute_psr(CPUSPARCState *env)
 {
     if (CC_OP == CC_OP_FLAGS) {
         return;
     }
-
-    uint32_t icc = icc_table[CC_OP].compute_all(env);
-#ifdef TARGET_SPARC64
-    uint32_t xcc = xcc_table[CC_OP].compute_all(env);
-
-    env->cc_N = deposit64(-(icc & PSR_NEG), 32, 32, -(xcc & PSR_NEG));
-    env->cc_V = deposit64(-(icc & PSR_OVF), 32, 32, -(xcc & PSR_OVF));
-    env->icc_C = (uint64_t)icc << (32 - PSR_CARRY_SHIFT);
-    env->xcc_C = (xcc >> PSR_CARRY_SHIFT) & 1;
-    env->xcc_Z = ~xcc & PSR_ZERO;
-#else
-    env->cc_N = -(icc & PSR_NEG);
-    env->cc_V = -(icc & PSR_OVF);
-    env->icc_C = (icc >> PSR_CARRY_SHIFT) & 1;
-#endif
-    env->icc_Z = ~icc & PSR_ZERO;
-
-    CC_OP = CC_OP_FLAGS;
+    g_assert_not_reached();
 }
 
 uint32_t helper_compute_C_icc(CPUSPARCState *env)
@@ -224,5 +38,5 @@  uint32_t helper_compute_C_icc(CPUSPARCState *env)
         return env->icc_C;
 #endif
     }
-    return icc_table[CC_OP].compute_c(env) >> PSR_CARRY_SHIFT;
+    g_assert_not_reached();
 }
diff --git a/target/sparc/helper.c b/target/sparc/helper.c
index 53eec693dd..6117e99b55 100644
--- a/target/sparc/helper.c
+++ b/target/sparc/helper.c
@@ -156,7 +156,7 @@  uint64_t helper_udivx(CPUSPARCState *env, uint64_t a, uint64_t b)
 target_ulong helper_taddcctv(CPUSPARCState *env, target_ulong src1,
                              target_ulong src2)
 {
-    target_ulong dst;
+    target_ulong dst, v;
 
     /* Tag overflow occurs if either input has bits 0 or 1 set.  */
     if ((src1 | src2) & 3) {
@@ -166,13 +166,23 @@  target_ulong helper_taddcctv(CPUSPARCState *env, target_ulong src1,
     dst = src1 + src2;
 
     /* Tag overflow occurs if the addition overflows.  */
-    if (~(src1 ^ src2) & (src1 ^ dst) & (1u << 31)) {
+    v = ~(src1 ^ src2) & (src1 ^ dst);
+    if (v & (1u << 31)) {
         goto tag_overflow;
     }
 
     /* Only modify the CC after any exceptions have been generated.  */
-    env->cc_src = src1;
-    env->cc_src2 = src2;
+    env->cc_V = v;
+    env->cc_N = dst;
+    env->icc_Z = dst;
+#ifdef TARGET_SPARC64
+    env->xcc_Z = dst;
+    env->icc_C = dst ^ src1 ^ src2;
+    env->xcc_C = dst < src1;
+#else
+    env->icc_C = dst < src1;
+#endif
+
     return dst;
 
  tag_overflow:
@@ -182,7 +192,7 @@  target_ulong helper_taddcctv(CPUSPARCState *env, target_ulong src1,
 target_ulong helper_tsubcctv(CPUSPARCState *env, target_ulong src1,
                              target_ulong src2)
 {
-    target_ulong dst;
+    target_ulong dst, v;
 
     /* Tag overflow occurs if either input has bits 0 or 1 set.  */
     if ((src1 | src2) & 3) {
@@ -192,13 +202,23 @@  target_ulong helper_tsubcctv(CPUSPARCState *env, target_ulong src1,
     dst = src1 - src2;
 
     /* Tag overflow occurs if the subtraction overflows.  */
-    if ((src1 ^ src2) & (src1 ^ dst) & (1u << 31)) {
+    v = (src1 ^ src2) & (src1 ^ dst);
+    if (v & (1u << 31)) {
         goto tag_overflow;
     }
 
     /* Only modify the CC after any exceptions have been generated.  */
-    env->cc_src = src1;
-    env->cc_src2 = src2;
+    env->cc_V = v;
+    env->cc_N = dst;
+    env->icc_Z = dst;
+#ifdef TARGET_SPARC64
+    env->xcc_Z = dst;
+    env->icc_C = dst ^ src1 ^ src2;
+    env->xcc_C = src1 < src2;
+#else
+    env->icc_C = src1 < src2;
+#endif
+
     return dst;
 
  tag_overflow:
diff --git a/target/sparc/translate.c b/target/sparc/translate.c
index d119ce4c94..7703166ebd 100644
--- a/target/sparc/translate.c
+++ b/target/sparc/translate.c
@@ -3598,8 +3598,8 @@  TRANS(SUB, ALL, do_arith, a, CC_OP_FLAGS,
 
 TRANS(TADDcc, ALL, do_arith, a, CC_OP_FLAGS, NULL, NULL, gen_op_taddcc)
 TRANS(TSUBcc, ALL, do_arith, a, CC_OP_FLAGS, NULL, NULL, gen_op_tsubcc)
-TRANS(TADDccTV, ALL, do_arith, a, CC_OP_TADDTV, NULL, NULL, gen_op_taddcctv)
-TRANS(TSUBccTV, ALL, do_arith, a, CC_OP_TSUBTV, NULL, NULL, gen_op_tsubcctv)
+TRANS(TADDccTV, ALL, do_arith, a, CC_OP_FLAGS, NULL, NULL, gen_op_taddcctv)
+TRANS(TSUBccTV, ALL, do_arith, a, CC_OP_FLAGS, NULL, NULL, gen_op_tsubcctv)
 
 TRANS(AND, ALL, do_logic, a, tcg_gen_and_tl, tcg_gen_andi_tl)
 TRANS(XOR, ALL, do_logic, a, tcg_gen_xor_tl, tcg_gen_xori_tl)