[PULL 06/15] target/ppc: Implemented remaining vector divide extended

[Daniel Henrique Barboza]

From: "Lucas Mateus Castro (alqotel)" <lucas.araujo@eldorado.org.br>

Implement the following PowerISA v3.1 instructions:
vdivesd: Vector Divide Extended Signed Doubleword
vdiveud: Vector Divide Extended Unsigned Doubleword
vdivesq: Vector Divide Extended Signed Quadword
vdiveuq: Vector Divide Extended Unsigned Quadword

Signed-off-by: Lucas Mateus Castro (alqotel) <lucas.araujo@eldorado.org.br>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220525134954.85056-7-lucas.araujo@eldorado.org.br>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
---
 target/ppc/helper.h                 |  4 ++
 target/ppc/insn32.decode            |  4 ++
 target/ppc/int_helper.c             | 64 +++++++++++++++++++++++++++++
 target/ppc/translate/vmx-impl.c.inc |  4 ++
 4 files changed, 76 insertions(+)

diff --git a/target/ppc/helper.h b/target/ppc/helper.h
index 9f33e589e0..e7624300df 100644
--- a/target/ppc/helper.h
+++ b/target/ppc/helper.h
@@ -177,6 +177,10 @@ DEF_HELPER_FLAGS_3(VMULOUH, TCG_CALL_NO_RWG, void, avr, 
avr, avr)
 DEF_HELPER_FLAGS_3(VMULOUW, TCG_CALL_NO_RWG, void, avr, avr, avr)
 DEF_HELPER_FLAGS_3(VDIVSQ, TCG_CALL_NO_RWG, void, avr, avr, avr)
 DEF_HELPER_FLAGS_3(VDIVUQ, TCG_CALL_NO_RWG, void, avr, avr, avr)
+DEF_HELPER_FLAGS_3(VDIVESD, TCG_CALL_NO_RWG, void, avr, avr, avr)
+DEF_HELPER_FLAGS_3(VDIVEUD, TCG_CALL_NO_RWG, void, avr, avr, avr)
+DEF_HELPER_FLAGS_3(VDIVESQ, TCG_CALL_NO_RWG, void, avr, avr, avr)
+DEF_HELPER_FLAGS_3(VDIVEUQ, TCG_CALL_NO_RWG, void, avr, avr, avr)
 DEF_HELPER_FLAGS_3(vslo, TCG_CALL_NO_RWG, void, avr, avr, avr)
 DEF_HELPER_FLAGS_3(vsro, TCG_CALL_NO_RWG, void, avr, avr, avr)
 DEF_HELPER_FLAGS_3(vsrv, TCG_CALL_NO_RWG, void, avr, avr, avr)
diff --git a/target/ppc/insn32.decode b/target/ppc/insn32.decode
index f6d2d4b257..5b2d7824a0 100644
--- a/target/ppc/insn32.decode
+++ b/target/ppc/insn32.decode
@@ -798,3 +798,7 @@ VDIVUQ          000100 ..... ..... ..... 00000001011    @VX
 
 VDIVESW         000100 ..... ..... ..... 01110001011    @VX
 VDIVEUW         000100 ..... ..... ..... 01010001011    @VX
+VDIVESD         000100 ..... ..... ..... 01111001011    @VX
+VDIVEUD         000100 ..... ..... ..... 01011001011    @VX
+VDIVESQ         000100 ..... ..... ..... 01100001011    @VX
+VDIVEUQ         000100 ..... ..... ..... 01000001011    @VX
diff --git a/target/ppc/int_helper.c b/target/ppc/int_helper.c
index 033718dc0e..42f0dcfc52 100644
--- a/target/ppc/int_helper.c
+++ b/target/ppc/int_helper.c
@@ -1183,6 +1183,70 @@ void helper_VDIVUQ(ppc_avr_t *t, ppc_avr_t *a, ppc_avr_t 
*b)
     }
 }
 
+void helper_VDIVESD(ppc_avr_t *t, ppc_avr_t *a, ppc_avr_t *b)
+{
+    int i;
+    int64_t high;
+    uint64_t low;
+    for (i = 0; i < 2; i++) {
+        high = a->s64[i];
+        low = 0;
+        if (unlikely((high == INT64_MIN && b->s64[i] == -1) || !b->s64[i])) {
+            t->s64[i] = a->s64[i]; /* Undefined behavior */
+        } else {
+            divs128(&low, &high, b->s64[i]);
+            t->s64[i] = low;
+        }
+    }
+}
+
+void helper_VDIVEUD(ppc_avr_t *t, ppc_avr_t *a, ppc_avr_t *b)
+{
+    int i;
+    uint64_t high, low;
+    for (i = 0; i < 2; i++) {
+        high = a->u64[i];
+        low = 0;
+        if (unlikely(!b->u64[i])) {
+            t->u64[i] = a->u64[i]; /* Undefined behavior */
+        } else {
+            divu128(&low, &high, b->u64[i]);
+            t->u64[i] = low;
+        }
+    }
+}
+
+void helper_VDIVESQ(ppc_avr_t *t, ppc_avr_t *a, ppc_avr_t *b)
+{
+    Int128 high, low;
+    Int128 int128_min = int128_make128(0, INT64_MIN);
+    Int128 neg1 = int128_makes64(-1);
+
+    high = a->s128;
+    low = int128_zero();
+    if (unlikely(!int128_nz(b->s128) ||
+                 (int128_eq(b->s128, neg1) && int128_eq(high, int128_min)))) {
+        t->s128 = a->s128; /* Undefined behavior */
+    } else {
+        divs256(&low, &high, b->s128);
+        t->s128 = low;
+    }
+}
+
+void helper_VDIVEUQ(ppc_avr_t *t, ppc_avr_t *a, ppc_avr_t *b)
+{
+    Int128 high, low;
+
+    high = a->s128;
+    low = int128_zero();
+    if (unlikely(!int128_nz(b->s128))) {
+        t->s128 = a->s128; /* Undefined behavior */
+    } else {
+        divu256(&low, &high, b->s128);
+        t->s128 = low;
+    }
+}
+
 void helper_VPERM(ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b, ppc_avr_t *c)
 {
     ppc_avr_t result;
diff --git a/target/ppc/translate/vmx-impl.c.inc 
b/target/ppc/translate/vmx-impl.c.inc
index 8c542bcb29..f00aa64bf9 100644
--- a/target/ppc/translate/vmx-impl.c.inc
+++ b/target/ppc/translate/vmx-impl.c.inc
@@ -3367,6 +3367,10 @@ DIVU32(do_diveuw, do_diveu_i32)
 
 TRANS_FLAGS2(ISA310, VDIVESW, do_vdiv_vmod, MO_32, do_divesw, NULL)
 TRANS_FLAGS2(ISA310, VDIVEUW, do_vdiv_vmod, MO_32, do_diveuw, NULL)
+TRANS_FLAGS2(ISA310, VDIVESD, do_vx_helper, gen_helper_VDIVESD)
+TRANS_FLAGS2(ISA310, VDIVEUD, do_vx_helper, gen_helper_VDIVEUD)
+TRANS_FLAGS2(ISA310, VDIVESQ, do_vx_helper, gen_helper_VDIVESQ)
+TRANS_FLAGS2(ISA310, VDIVEUQ, do_vx_helper, gen_helper_VDIVEUQ)
 
 #undef DIVS32
 #undef DIVU32
-- 
2.36.1