target/ppc: move FP and VMX registers into aligned vsr register array

The VSX register array is a block of 64 128-bit registers where the first 32
registers consist of the existing 64-bit FP registers extended to 128-bit
using new VSR registers, and the last 32 registers are the VMX 128-bit
registers as show below:

            64-bit               64-bit
    +--------------------+--------------------+
    |        FP0         |                    |  VSR0
    +--------------------+--------------------+
    |        FP1         |                    |  VSR1
    +--------------------+--------------------+
    |        ...         |        ...         |  ...
    +--------------------+--------------------+
    |        FP30        |                    |  VSR30
    +--------------------+--------------------+
    |        FP31        |                    |  VSR31
    +--------------------+--------------------+
    |                  VMX0                   |  VSR32
    +-----------------------------------------+
    |                  VMX1                   |  VSR33
    +-----------------------------------------+
    |                  ...                    |  ...
    +-----------------------------------------+
    |                  VMX30                  |  VSR62
    +-----------------------------------------+
    |                  VMX31                  |  VSR63
    +-----------------------------------------+

In order to allow for future conversion of VSX instructions to use TCG vector
operations, recreate the same layout using an aligned version of the existing
vsr register array.

Since the old fpr and avr register arrays are removed, the existing callers
must also be updated to use the correct offset in the vsr register array. This
also includes switching the relevant VMState fields over to using subarrays
to make sure that migration is preserved.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

1 files changed, 19 insertions, 6 deletions

diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h
index 578641ac20..91951d7730 100644
--- a/target/ppc/cpu.h
+++ b/target/ppc/cpu.h
@@ -1004,8 +1004,6 @@ struct CPUPPCState {
 
     /* Floating point execution context */
     float_status fp_status;
-    /* floating point registers */
-    float64 fpr[32];
     /* floating point status and control register */
     target_ulong fpscr;
 
@@ -1055,11 +1053,10 @@ struct CPUPPCState {
     /* Special purpose registers */
     target_ulong spr[1024];
     ppc_spr_t spr_cb[1024];
-    /* Altivec registers */
-    ppc_avr_t avr[32];
+    /* Vector status and control register */
     uint32_t vscr;
-    /* VSX registers */
-    uint64_t vsr[32];
+    /* VSX registers (including FP and AVR) */
+    ppc_vsr_t vsr[64] QEMU_ALIGNED(16);
     /* SPE registers */
     uint64_t spe_acc;
     uint32_t spe_fscr;
@@ -2540,6 +2537,22 @@ static inline bool lsw_reg_in_range(int start, int nregs, int rx)
            (start + nregs > 32 && (rx >= start || rx < start + nregs - 32));
 }
 
+/* Accessors for FP, VMX and VSX registers */
+static inline uint64_t *cpu_fpr_ptr(CPUPPCState *env, int i)
+{
+    return &env->vsr[i].u64[0];
+}
+
+static inline uint64_t *cpu_vsrl_ptr(CPUPPCState *env, int i)
+{
+    return &env->vsr[i].u64[1];
+}
+
+static inline ppc_avr_t *cpu_avr_ptr(CPUPPCState *env, int i)
+{
+    return &env->vsr[32 + i];
+}
+
 void dump_mmu(FILE *f, fprintf_function cpu_fprintf, CPUPPCState *env);
 
 void ppc_maybe_bswap_register(CPUPPCState *env, uint8_t *mem_buf, int len);