diff mbox series

[v3,4/9] target/ppc: Implemented vector divide extended word

Message ID 20220420194037.263661-5-lucas.araujo@eldorado.org.br (mailing list archive)
State New, archived
Headers show
Series VDIV/VMOD Implementation | expand

Commit Message

Lucas Mateus Martins Araujo e Castro April 20, 2022, 7:40 p.m. UTC 
From: "Lucas Mateus Castro (alqotel)" <lucas.araujo@eldorado.org.br>

Implement the following PowerISA v3.1 instructions:
vdivesw: Vector Divide Extended Signed Word
vdiveuw: Vector Divide Extended Unsigned Word

Signed-off-by: Lucas Mateus Castro (alqotel) <lucas.araujo@eldorado.org.br>
---
 target/ppc/insn32.decode            |  3 ++
 target/ppc/translate/vmx-impl.c.inc | 48 +++++++++++++++++++++++++++++
 2 files changed, 51 insertions(+)
diff mbox series

Patch

diff --git a/target/ppc/insn32.decode b/target/ppc/insn32.decode
index 3a88a0b5bc..8c115c9c60 100644
--- a/target/ppc/insn32.decode
+++ b/target/ppc/insn32.decode
@@ -712,3 +712,6 @@  VDIVSD          000100 ..... ..... ..... 00111001011    @VX
 VDIVUD          000100 ..... ..... ..... 00011001011    @VX
 VDIVSQ          000100 ..... ..... ..... 00100001011    @VX
 VDIVUQ          000100 ..... ..... ..... 00000001011    @VX
+
+VDIVESW         000100 ..... ..... ..... 01110001011    @VX
+VDIVEUW         000100 ..... ..... ..... 01010001011    @VX
diff --git a/target/ppc/translate/vmx-impl.c.inc b/target/ppc/translate/vmx-impl.c.inc
index cfd3c3ea6f..d1c1c6cf03 100644
--- a/target/ppc/translate/vmx-impl.c.inc
+++ b/target/ppc/translate/vmx-impl.c.inc
@@ -3318,6 +3318,54 @@  TRANS_FLAGS2(ISA310, VDIVUD, do_vdiv_vmod, MO_64, NULL, do_divud)
 TRANS_FLAGS2(ISA310, VDIVSQ, do_vx_helper, gen_helper_VDIVSQ)
 TRANS_FLAGS2(ISA310, VDIVUQ, do_vx_helper, gen_helper_VDIVUQ)
 
+static void do_dives_i32(TCGv_i32 t, TCGv_i32 a, TCGv_i32 b)
+{
+    TCGv_i64 val1, val2;
+
+    val1 = tcg_temp_new_i64();
+    val2 = tcg_temp_new_i64();
+
+    tcg_gen_ext_i32_i64(val1, a);
+    tcg_gen_ext_i32_i64(val2, b);
+
+    /* (a << 32)/b */
+    tcg_gen_shli_i64(val1, val1, 32);
+    tcg_gen_div_i64(val1, val1, val2);
+
+    /* if quotient doesn't fit in 32 bits the result is undefined */
+    tcg_gen_extrl_i64_i32(t, val1);
+
+    tcg_temp_free_i64(val1);
+    tcg_temp_free_i64(val2);
+}
+
+static void do_diveu_i32(TCGv_i32 t, TCGv_i32 a, TCGv_i32 b)
+{
+    TCGv_i64 val1, val2;
+
+    val1 = tcg_temp_new_i64();
+    val2 = tcg_temp_new_i64();
+
+    tcg_gen_extu_i32_i64(val1, a);
+    tcg_gen_extu_i32_i64(val2, b);
+
+    /* (a << 32)/b */
+    tcg_gen_shli_i64(val1, val1, 32);
+    tcg_gen_divu_i64(val1, val1, val2);
+
+    /* if quotient doesn't fit in 32 bits the result is undefined */
+    tcg_gen_extrl_i64_i32(t, val1);
+
+    tcg_temp_free_i64(val1);
+    tcg_temp_free_i64(val2);
+}
+
+DIVS32(do_divesw, do_dives_i32)
+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)
+
 #undef DIVS32
 #undef DIVU32
 #undef DIVS64