Patchwork [083/147] target-s390: Convert FP SQUARE ROOT

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Submitter Richard Henderson
Date Sept. 28, 2012, 12:16 a.m.
Message ID <1348791411-26251-1-git-send-email-rth@twiddle.net>
Download mbox | patch
Permalink /patch/187605/
State New
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Richard Henderson - Sept. 28, 2012, 12:16 a.m.
Signed-off-by: Richard Henderson <rth@twiddle.net>
---
 target-s390x/fpu_helper.c  | 24 +++++++++++++++++++++---
 target-s390x/helper.h      |  4 +++-
 target-s390x/insn-data.def |  7 +++++++
 target-s390x/translate.c   | 22 +++++++++++++++++++---
 4 files changed, 50 insertions(+), 7 deletions(-)

Patch

diff --git a/target-s390x/fpu_helper.c b/target-s390x/fpu_helper.c
index 0a2bdd0..82e44c5 100644
--- a/target-s390x/fpu_helper.c
+++ b/target-s390x/fpu_helper.c
@@ -613,8 +613,26 @@  uint32_t HELPER(tcxb)(uint64_t ah, uint64_t al, uint64_t m2)
     return cc;
 }
 
-/* square root 64-bit RR */
-void HELPER(sqdbr)(CPUS390XState *env, uint32_t f1, uint32_t f2)
+/* square root 32-bit */
+uint64_t HELPER(sqeb)(CPUS390XState *env, uint64_t f2)
 {
-    env->fregs[f1].d = float64_sqrt(env->fregs[f2].d, &env->fpu_status);
+    float32 ret = float32_sqrt(f2, &env->fpu_status);
+    handle_exceptions(env, GETPC());
+    return ret;
+}
+
+/* square root 64-bit */
+uint64_t HELPER(sqdb)(CPUS390XState *env, uint64_t f2)
+{
+    float64 ret = float64_sqrt(f2, &env->fpu_status);
+    handle_exceptions(env, GETPC());
+    return ret;
+}
+
+/* square root 128-bit */
+uint64_t HELPER(sqxb)(CPUS390XState *env, uint64_t ah, uint64_t al)
+{
+    float128 ret = float128_sqrt(make_float128(ah, al), &env->fpu_status);
+    handle_exceptions(env, GETPC());
+    return RET128(ret);
 }
diff --git a/target-s390x/helper.h b/target-s390x/helper.h
index a32ba9b..6e5c340 100644
--- a/target-s390x/helper.h
+++ b/target-s390x/helper.h
@@ -76,7 +76,9 @@  DEF_HELPER_FLAGS_2(tceb, TCG_CALL_PURE | TCG_CALL_CONST, i32, i64, i64)
 DEF_HELPER_FLAGS_2(tcdb, TCG_CALL_PURE | TCG_CALL_CONST, i32, i64, i64)
 DEF_HELPER_FLAGS_3(tcxb, TCG_CALL_PURE | TCG_CALL_CONST, i32, i64, i64, i64)
 DEF_HELPER_3(flogr, i32, env, i32, i64)
-DEF_HELPER_3(sqdbr, void, env, i32, i32)
+DEF_HELPER_2(sqeb, i64, env, i64)
+DEF_HELPER_2(sqdb, i64, env, i64)
+DEF_HELPER_3(sqxb, i64, env, i64, i64)
 DEF_HELPER_FLAGS_1(cvd, TCG_CALL_PURE|TCG_CALL_CONST, i64, s32)
 DEF_HELPER_4(unpk, void, env, i32, i64, i64)
 DEF_HELPER_4(tr, void, env, i32, i64, i64)
diff --git a/target-s390x/insn-data.def b/target-s390x/insn-data.def
index 74bc994..93fd3ca 100644
--- a/target-s390x/insn-data.def
+++ b/target-s390x/insn-data.def
@@ -459,6 +459,13 @@ 
 /* SHIFT RIGHT DOUBLE LOGICAL */
     C(0x8c00, SRDL,    RS_a,  Z,   r1_D32, sh64, new, r1_D32, srl, 0)
 
+/* SQUARE ROOT */
+    C(0xb314, SQEBR,   RRE,   Z,   0, e2, new, e1, sqeb, 0)
+    C(0xb315, SQDBR,   RRE,   Z,   0, f2_o, f1, 0, sqdb, 0)
+    C(0xb316, SQXBR,   RRE,   Z,   0, x2_o, x1, 0, sqxb, 0)
+    C(0xed14, SQEB,    RXE,   Z,   0, m2_32u, new, e1, sqeb, 0)
+    C(0xed15, SQDB,    RXE,   Z,   0, m2_64, f1, 0, sqdb, 0)
+
 /* STORE */
     C(0x5000, ST,      RX_a,  Z,   r1_o, a2, 0, 0, st32, 0)
     C(0xe350, STY,     RXY_a, LD,  r1_o, a2, 0, 0, st32, 0)
diff --git a/target-s390x/translate.c b/target-s390x/translate.c
index 0bb39bb..b51c6f7 100644
--- a/target-s390x/translate.c
+++ b/target-s390x/translate.c
@@ -1385,9 +1385,6 @@  static void disas_b3(CPUS390XState *env, DisasContext *s, int op, int m3,
     tcg_temp_free_i32(tmp32_2);
 
     switch (op) {
-    case 0x15: /* SQBDR       R1,R2             [RRE] */
-        FP_HELPER(sqdbr);
-        break;
     case 0x74: /* LZER        R1                [RRE] */
         tmp32_1 = tcg_const_i32(r1);
         gen_helper_lzer(cpu_env, tmp32_1);
@@ -2936,6 +2933,25 @@  static ExitStatus op_sxb(DisasContext *s, DisasOps *o)
     return NO_EXIT;
 }
 
+static ExitStatus op_sqeb(DisasContext *s, DisasOps *o)
+{
+    gen_helper_sqeb(o->out, cpu_env, o->in2);
+    return NO_EXIT;
+}
+
+static ExitStatus op_sqdb(DisasContext *s, DisasOps *o)
+{
+    gen_helper_sqdb(o->out, cpu_env, o->in2);
+    return NO_EXIT;
+}
+
+static ExitStatus op_sqxb(DisasContext *s, DisasOps *o)
+{
+    gen_helper_sqxb(o->out, cpu_env, o->in1, o->in2);
+    return_low128(o->out2);
+    return NO_EXIT;
+}
+
 #ifndef CONFIG_USER_ONLY
 static ExitStatus op_sigp(DisasContext *s, DisasOps *o)
 {