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target-s390: Convert 64-bit MULTIPLY LOGICAL

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Use a new "retxl" member of CPUS290XState to return the "eXtra Low" part
of a 128-bit value.  That said, this will get used when two independent
values need returning (e.g. quotient+remainder) as well.

At the same time, shuffle the elements of CPUS390XState to get this new
space from existing padding in the structure.

Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2012-09-25 15:26:59 -07:00
parent d87aaf934f
commit 1ac5889f48
5 changed files with 45 additions and 27 deletions
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17
target-s390x/cpu.h
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@ -60,17 +60,20 @@ typedef struct ExtQueue {
} ExtQueue;
typedef struct CPUS390XState {
uint64_t regs[16]; /* GP registers */
uint32_t aregs[16]; /* access registers */
uint32_t fpc; /* floating-point control register */
uint64_t regs[16]; /* GP registers */
CPU_DoubleU fregs[16]; /* FP registers */
uint32_t aregs[16]; /* access registers */
uint32_t fpc; /* floating-point control register */
uint32_t cc_op;
float_status fpu_status; /* passed to softfloat lib */
/* The low part of a 128-bit return, or remainder of a divide. */
uint64_t retxl;
PSW psw;
uint32_t cc_op;
uint64_t cc_src;
uint64_t cc_dst;
uint64_t cc_vr;
@ -86,8 +89,8 @@ typedef struct CPUS390XState {
uint64_t cregs[16]; /* control registers */
int pending_int;
ExtQueue ext_queue[MAX_EXT_QUEUE];
int pending_int;
int ext_index;