[Qemu-devel] [PULL 27/67] target-ppc: implement lxvl instruction

[David Gibson]

From: Nikunj A Dadhania <address@hidden>

lxvl: Load VSX Vector with Length

Little/Big-endian Storage:
+---+---+---+---+---+---+---+---+---+---+---+---+---+---+--+--+
|“T”|“h”|“i”|“s”|“ ”|“i”|“s”|“ ”|“a”|“ ”|“T”|“E”|“S”|“T”|FF|FF|
+---+---+---+---+---+---+---+---+---+---+---+---+---+---+--+--+

Loading 14 bytes results in:

Vector (8-bit elements) in BE:
+---+---+---+---+---+---+---+---+---+---+---+---+---+---+--+--+
|“T”|“h”|“i”|“s”|“ ”|“i”|“s”|“ ”|“a”|“ ”|“T”|“E”|“S”|“T”|00|00|
+---+---+---+---+---+---+---+---+---+---+---+---+---+---+--+--+

Vector (8-bit elements) in LE:
+--+--+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
|00|00|“T”|“S”|“E”|“T”|“ ”|“a”|“ ”|“s”|“i”|“ ”|“s”|“i”|"h"|"T"|
+--+--+---+---+---+---+---+---+---+---+---+---+---+---+---+---+

Signed-off-by: Nikunj A Dadhania <address@hidden>
Signed-off-by: David Gibson <address@hidden>
---
 target/ppc/helper.h                 |  3 +++
 target/ppc/mem_helper.c             | 35 +++++++++++++++++++++++++++++++++++
 target/ppc/translate/vsx-impl.inc.c | 29 +++++++++++++++++++++++++++++
 target/ppc/translate/vsx-ops.inc.c  |  3 +++
 4 files changed, 70 insertions(+)

diff --git a/target/ppc/helper.h b/target/ppc/helper.h
index c3df982..16ed2c1 100644
--- a/target/ppc/helper.h
+++ b/target/ppc/helper.h
@@ -317,6 +317,9 @@ DEF_HELPER_3(lvewx, void, env, avr, tl)
 DEF_HELPER_3(stvebx, void, env, avr, tl)
 DEF_HELPER_3(stvehx, void, env, avr, tl)
 DEF_HELPER_3(stvewx, void, env, avr, tl)
+#if defined(TARGET_PPC64)
+DEF_HELPER_4(lxvl, void, env, tl, tl, tl)
+#endif
 DEF_HELPER_4(vsumsws, void, env, avr, avr, avr)
 DEF_HELPER_4(vsum2sws, void, env, avr, avr, avr)
 DEF_HELPER_4(vsum4sbs, void, env, avr, avr, avr)
diff --git a/target/ppc/mem_helper.c b/target/ppc/mem_helper.c
index 1ab8a6e..c4ddc5b 100644
--- a/target/ppc/mem_helper.c
+++ b/target/ppc/mem_helper.c
@@ -24,6 +24,7 @@
 
 #include "helper_regs.h"
 #include "exec/cpu_ldst.h"
+#include "internal.h"
 
 //#define DEBUG_OP
 
@@ -284,6 +285,40 @@ STVE(stvewx, cpu_stl_data_ra, bswap32, u32)
 #undef I
 #undef LVE
 
+#ifdef TARGET_PPC64
+#define GET_NB(rb) ((rb >> 56) & 0xFF)
+
+#define VSX_LXVL(name, lj)                                              \
+void helper_##name(CPUPPCState *env, target_ulong addr,                 \
+                   target_ulong xt_num, target_ulong rb)                \
+{                                                                       \
+    int i;                                                              \
+    ppc_vsr_t xt;                                                       \
+    uint64_t nb = GET_NB(rb);                                           \
+                                                                        \
+    xt.s128 = int128_zero();                                            \
+    if (nb) {                                                           \
+        nb = (nb >= 16) ? 16 : nb;                                      \
+        if (msr_le && !lj) {                                            \
+            for (i = 16; i > 16 - nb; i--) {                            \
+                xt.VsrB(i - 1) = cpu_ldub_data_ra(env, addr, GETPC());  \
+                addr = addr_add(env, addr, 1);                          \
+            }                                                           \
+        } else {                                                        \
+            for (i = 0; i < nb; i++) {                                  \
+                xt.VsrB(i) = cpu_ldub_data_ra(env, addr, GETPC());      \
+                addr = addr_add(env, addr, 1);                          \
+            }                                                           \
+        }                                                               \
+    }                                                                   \
+    putVSR(xt_num, &xt, env);                                           \
+}
+
+VSX_LXVL(lxvl, 0)
+#undef VSX_LXVL
+#undef GET_NB
+#endif /* TARGET_PPC64 */
+
 #undef HI_IDX
 #undef LO_IDX
 
diff --git a/target/ppc/translate/vsx-impl.inc.c 
b/target/ppc/translate/vsx-impl.inc.c
index 7000035..1f64fb7 100644
--- a/target/ppc/translate/vsx-impl.inc.c
+++ b/target/ppc/translate/vsx-impl.inc.c
@@ -240,6 +240,35 @@ VSX_VECTOR_LOAD_STORE(stxv, st_i64, 0)
 VSX_VECTOR_LOAD_STORE(lxvx, ld_i64, 1)
 VSX_VECTOR_LOAD_STORE(stxvx, st_i64, 1)
 
+#ifdef TARGET_PPC64
+#define VSX_VECTOR_LOAD_STORE_LENGTH(name)                      \
+static void gen_##name(DisasContext *ctx)                       \
+{                                                               \
+    TCGv EA, xt;                                                \
+                                                                \
+    if (xT(ctx->opcode) < 32) {                                 \
+        if (unlikely(!ctx->vsx_enabled)) {                      \
+            gen_exception(ctx, POWERPC_EXCP_VSXU);              \
+            return;                                             \
+        }                                                       \
+    } else {                                                    \
+        if (unlikely(!ctx->altivec_enabled)) {                  \
+            gen_exception(ctx, POWERPC_EXCP_VPU);               \
+            return;                                             \
+        }                                                       \
+    }                                                           \
+    EA = tcg_temp_new();                                        \
+    xt = tcg_const_tl(xT(ctx->opcode));                         \
+    gen_set_access_type(ctx, ACCESS_INT);                       \
+    gen_addr_register(ctx, EA);                                 \
+    gen_helper_##name(cpu_env, EA, xt, cpu_gpr[rB(ctx->opcode)]); \
+    tcg_temp_free(EA);                                          \
+    tcg_temp_free(xt);                                          \
+}
+
+VSX_VECTOR_LOAD_STORE_LENGTH(lxvl)
+#endif
+
 #define VSX_LOAD_SCALAR_DS(name, operation)                       \
 static void gen_##name(DisasContext *ctx)                         \
 {                                                                 \
diff --git a/target/ppc/translate/vsx-ops.inc.c 
b/target/ppc/translate/vsx-ops.inc.c
index f684066..62a0afc 100644
--- a/target/ppc/translate/vsx-ops.inc.c
+++ b/target/ppc/translate/vsx-ops.inc.c
@@ -10,6 +10,9 @@ GEN_HANDLER_E(lxvw4x, 0x1F, 0x0C, 0x18, 0, PPC_NONE, 
PPC2_VSX),
 GEN_HANDLER_E(lxvh8x, 0x1F, 0x0C, 0x19, 0, PPC_NONE,  PPC2_ISA300),
 GEN_HANDLER_E(lxvb16x, 0x1F, 0x0C, 0x1B, 0, PPC_NONE, PPC2_ISA300),
 GEN_HANDLER_E(lxvx, 0x1F, 0x0C, 0x08, 0x00000040, PPC_NONE, PPC2_ISA300),
+#if defined(TARGET_PPC64)
+GEN_HANDLER_E(lxvl, 0x1F, 0x0D, 0x08, 0, PPC_NONE, PPC2_ISA300),
+#endif
 
 GEN_HANDLER_E(stxsdx, 0x1F, 0xC, 0x16, 0, PPC_NONE, PPC2_VSX),
 GEN_HANDLER_E(stxsibx, 0x1F, 0xD, 0x1C, 0, PPC_NONE, PPC2_ISA300),
-- 
2.9.3