target/ppc: Implemented [pm]xvbf16ger2*

Implement the following PowerISA v3.1 instructions:
xvbf16ger2:   VSX Vector bfloat16 GER (rank-2 update)
xvbf16ger2nn: VSX Vector bfloat16 GER (rank-2 update) Negative multiply,
Negative accumulate
xvbf16ger2np: VSX Vector bfloat16 GER (rank-2 update) Negative multiply,
Positive accumulate
xvbf16ger2pn: VSX Vector bfloat16 GER (rank-2 update) Positive multiply,
Negative accumulate
xvbf16ger2pp: VSX Vector bfloat16 GER (rank-2 update) Positive multiply,
Positive accumulate
pmxvbf16ger2:   Prefixed Masked VSX Vector bfloat16 GER (rank-2 update)
pmxvbf16ger2nn: Prefixed Masked VSX Vector bfloat16 GER (rank-2 update)
Negative multiply, Negative accumulate
pmxvbf16ger2np: Prefixed Masked VSX Vector bfloat16 GER (rank-2 update)
Negative multiply, Positive accumulate
pmxvbf16ger2pn: Prefixed Masked VSX Vector bfloat16 GER (rank-2 update)
Positive multiply, Negative accumulate
pmxvbf16ger2pp: Prefixed Masked VSX Vector bfloat16 GER (rank-2 update)
Positive multiply, Positive accumulate

Signed-off-by: Lucas Mateus Castro (alqotel) <lucas.araujo@eldorado.org.br>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220524140537.27451-8-lucas.araujo@eldorado.org.br>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>

5 files changed, 74 insertions, 0 deletions

diff --git a/target/ppc/fpu_helper.c b/target/ppc/fpu_helper.c
index a9b2ef370f..fed0ce420a 100644
--- a/target/ppc/fpu_helper.c
+++ b/target/ppc/fpu_helper.c
@@ -3517,6 +3517,11 @@ static float64 extract_hf16(float16 in, float_status *fp_status)
     return float16_to_float64(in, true, fp_status);
 }
 
+static float64 extract_bf16(bfloat16 in, float_status *fp_status)
+{
+    return bfloat16_to_float64(in, fp_status);
+}
+
 static void vsxger16(CPUPPCState *env, ppc_vsr_t *a, ppc_vsr_t *b,
                      ppc_acc_t  *at, uint32_t mask, bool acc,
                      bool neg_mul, bool neg_acc, extract_f16 extract)
@@ -3640,6 +3645,41 @@ static void vsxger(CPUPPCState *env, ppc_vsr_t *a, ppc_vsr_t *b,
 }
 
 QEMU_FLATTEN
+void helper_XVBF16GER2(CPUPPCState *env, ppc_vsr_t *a, ppc_vsr_t *b,
+                       ppc_acc_t *at, uint32_t mask)
+{
+    vsxger16(env, a, b, at, mask, false, false, false, extract_bf16);
+}
+
+QEMU_FLATTEN
+void helper_XVBF16GER2PP(CPUPPCState *env, ppc_vsr_t *a, ppc_vsr_t *b,
+                         ppc_acc_t *at, uint32_t mask)
+{
+    vsxger16(env, a, b, at, mask, true, false, false, extract_bf16);
+}
+
+QEMU_FLATTEN
+void helper_XVBF16GER2PN(CPUPPCState *env, ppc_vsr_t *a, ppc_vsr_t *b,
+                         ppc_acc_t *at, uint32_t mask)
+{
+    vsxger16(env, a, b, at, mask, true, false, true, extract_bf16);
+}
+
+QEMU_FLATTEN
+void helper_XVBF16GER2NP(CPUPPCState *env, ppc_vsr_t *a, ppc_vsr_t *b,
+                         ppc_acc_t *at, uint32_t mask)
+{
+    vsxger16(env, a, b, at, mask, true, true, false, extract_bf16);
+}
+
+QEMU_FLATTEN
+void helper_XVBF16GER2NN(CPUPPCState *env, ppc_vsr_t *a, ppc_vsr_t *b,
+                         ppc_acc_t *at, uint32_t mask)
+{
+    vsxger16(env, a, b, at, mask, true, true, true, extract_bf16);
+}
+
+QEMU_FLATTEN
 void helper_XVF16GER2(CPUPPCState *env, ppc_vsr_t *a, ppc_vsr_t *b,
                      ppc_acc_t *at, uint32_t mask)
 {
diff --git a/target/ppc/helper.h b/target/ppc/helper.h
index 4070c0891c..6233e28d85 100644
--- a/target/ppc/helper.h
+++ b/target/ppc/helper.h
@@ -555,6 +555,11 @@ DEF_HELPER_5(XVF16GER2PP, void, env, vsr, vsr, acc, i32)
 DEF_HELPER_5(XVF16GER2PN, void, env, vsr, vsr, acc, i32)
 DEF_HELPER_5(XVF16GER2NP, void, env, vsr, vsr, acc, i32)
 DEF_HELPER_5(XVF16GER2NN, void, env, vsr, vsr, acc, i32)
+DEF_HELPER_5(XVBF16GER2, void, env, vsr, vsr, acc, i32)
+DEF_HELPER_5(XVBF16GER2PP, void, env, vsr, vsr, acc, i32)
+DEF_HELPER_5(XVBF16GER2PN, void, env, vsr, vsr, acc, i32)
+DEF_HELPER_5(XVBF16GER2NP, void, env, vsr, vsr, acc, i32)
+DEF_HELPER_5(XVBF16GER2NN, void, env, vsr, vsr, acc, i32)
 DEF_HELPER_5(XVF32GER, void, env, vsr, vsr, acc, i32)
 DEF_HELPER_5(XVF32GERPP, void, env, vsr, vsr, acc, i32)
 DEF_HELPER_5(XVF32GERPN, void, env, vsr, vsr, acc, i32)
diff --git a/target/ppc/insn32.decode b/target/ppc/insn32.decode
index b8e317159c..18a94fa3b5 100644
--- a/target/ppc/insn32.decode
+++ b/target/ppc/insn32.decode
@@ -763,6 +763,12 @@ XVI8GER4SPP     111011 ... -- ..... ..... 01100011 ..-  @XX3_at xa=%xx_xa
 XVI16GER2S      111011 ... -- ..... ..... 00101011 ..-  @XX3_at xa=%xx_xa
 XVI16GER2SPP    111011 ... -- ..... ..... 00101010 ..-  @XX3_at xa=%xx_xa
 
+XVBF16GER2      111011 ... -- ..... ..... 00110011 ..-  @XX3_at xa=%xx_xa
+XVBF16GER2PP    111011 ... -- ..... ..... 00110010 ..-  @XX3_at xa=%xx_xa
+XVBF16GER2PN    111011 ... -- ..... ..... 10110010 ..-  @XX3_at xa=%xx_xa
+XVBF16GER2NP    111011 ... -- ..... ..... 01110010 ..-  @XX3_at xa=%xx_xa
+XVBF16GER2NN    111011 ... -- ..... ..... 11110010 ..-  @XX3_at xa=%xx_xa
+
 XVF16GER2       111011 ... -- ..... ..... 00010011 ..-  @XX3_at xa=%xx_xa
 XVF16GER2PP     111011 ... -- ..... ..... 00010010 ..-  @XX3_at xa=%xx_xa
 XVF16GER2PN     111011 ... -- ..... ..... 10010010 ..-  @XX3_at xa=%xx_xa
diff --git a/target/ppc/insn64.decode b/target/ppc/insn64.decode
index 5ecc5c85bf..de115c1943 100644
--- a/target/ppc/insn64.decode
+++ b/target/ppc/insn64.decode
@@ -150,6 +150,17 @@ PMXVI16GER2S    000001 11 1001 -- - - pmsk:2 ------ ........       \
 PMXVI16GER2SPP  000001 11 1001 -- - - pmsk:2 ------ ........       \
                 111011 ... -- ..... ..... 00101010 ..-  @MMIRR_XX3
 
+PMXVBF16GER2    000001 11 1001 -- - - pmsk:2 ------ ........ \
+                111011 ... -- ..... ..... 00110011 ..-  @MMIRR_XX3
+PMXVBF16GER2PP  000001 11 1001 -- - - pmsk:2 ------ ........ \
+                111011 ... -- ..... ..... 00110010 ..-  @MMIRR_XX3
+PMXVBF16GER2PN  000001 11 1001 -- - - pmsk:2 ------ ........ \
+                111011 ... -- ..... ..... 10110010 ..-  @MMIRR_XX3
+PMXVBF16GER2NP  000001 11 1001 -- - - pmsk:2 ------ ........ \
+                111011 ... -- ..... ..... 01110010 ..-  @MMIRR_XX3
+PMXVBF16GER2NN  000001 11 1001 -- - - pmsk:2 ------ ........ \
+                111011 ... -- ..... ..... 11110010 ..-  @MMIRR_XX3
+
 PMXVF16GER2     000001 11 1001 -- - - pmsk:2 ------ ........ \
                 111011 ... -- ..... ..... 00010011 ..-  @MMIRR_XX3
 PMXVF16GER2PP   000001 11 1001 -- - - pmsk:2 ------ ........ \
diff --git a/target/ppc/translate/vsx-impl.c.inc b/target/ppc/translate/vsx-impl.c.inc
index e79752899a..7acdbceec4 100644
--- a/target/ppc/translate/vsx-impl.c.inc
+++ b/target/ppc/translate/vsx-impl.c.inc
@@ -2898,6 +2898,12 @@ TRANS64(PMXVI16GER2PP, do_ger, gen_helper_XVI16GER2PP)
 TRANS64(PMXVI16GER2S, do_ger, gen_helper_XVI16GER2S)
 TRANS64(PMXVI16GER2SPP, do_ger, gen_helper_XVI16GER2SPP)
 
+TRANS(XVBF16GER2, do_ger, gen_helper_XVBF16GER2)
+TRANS(XVBF16GER2PP, do_ger, gen_helper_XVBF16GER2PP)
+TRANS(XVBF16GER2PN, do_ger, gen_helper_XVBF16GER2PN)
+TRANS(XVBF16GER2NP, do_ger, gen_helper_XVBF16GER2NP)
+TRANS(XVBF16GER2NN, do_ger, gen_helper_XVBF16GER2NN)
+
 TRANS(XVF16GER2, do_ger, gen_helper_XVF16GER2)
 TRANS(XVF16GER2PP, do_ger, gen_helper_XVF16GER2PP)
 TRANS(XVF16GER2PN, do_ger, gen_helper_XVF16GER2PN)
@@ -2916,6 +2922,12 @@ TRANS(XVF64GERPN, do_ger, gen_helper_XVF64GERPN)
 TRANS(XVF64GERNP, do_ger, gen_helper_XVF64GERNP)
 TRANS(XVF64GERNN, do_ger, gen_helper_XVF64GERNN)
 
+TRANS64(PMXVBF16GER2, do_ger, gen_helper_XVBF16GER2)
+TRANS64(PMXVBF16GER2PP, do_ger, gen_helper_XVBF16GER2PP)
+TRANS64(PMXVBF16GER2PN, do_ger, gen_helper_XVBF16GER2PN)
+TRANS64(PMXVBF16GER2NP, do_ger, gen_helper_XVBF16GER2NP)
+TRANS64(PMXVBF16GER2NN, do_ger, gen_helper_XVBF16GER2NN)
+
 TRANS64(PMXVF16GER2, do_ger, gen_helper_XVF16GER2)
 TRANS64(PMXVF16GER2PP, do_ger, gen_helper_XVF16GER2PP)
 TRANS64(PMXVF16GER2PN, do_ger, gen_helper_XVF16GER2PN)