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2003-08-11 Shrinivas Atre <shrinivasa@KPITCummins.com>

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* sim/sh/gencode.c ( tab[] ): Addition of MAC.L handler and
        correction for MAC.W handler
        * sim/sh/interp.c ( macl ): New Function. Implementation of
        MAC.L handler.
This commit is contained in:
Michael Snyder
2003-08-11 19:28:05 +00:00
parent b246147cd3
commit d1789acece
3 changed files with 60 additions and 3 deletions
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52
sim/sh/interp.c
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@ -169,6 +169,7 @@ static char **prog_argv;
#if 1
static int maskw = 0;
static int maskl = 0;
#endif
static SIM_OPEN_KIND sim_kind;
@ -651,6 +652,7 @@ rbat_fast (memory, x, maskb)
#define RUWAT(x) (RWAT(x) & 0xffff)
#define RSWAT(x) ((short)(RWAT(x)))
#define RSLAT(x) ((long)(RLAT(x)))
#define RSBAT(x) (SEXT(RBAT(x)))
#define RDAT(x, n) (do_rdat (memory, (x), (n), (maskl)))
@ -1348,6 +1350,56 @@ macw (regs, memory, n, m, endianw)
MACL = sum;
}
static void
macl (regs, memory, n, m)
int *regs;
unsigned char *memory;
int m, n;
{
long tempm, tempn;
long prod, macl, mach, sum;
long long ans,ansl,ansh,t;
unsigned long long high,low,combine;
union mac64
{
long m[2]; /* mach and macl*/
long long m64; /* 64 bit MAC */
}mac64;
tempm = RSLAT(regs[m]);
regs[m] += 4;
tempn = RSLAT(regs[n]);
regs[n] += 4;
mach = MACH;
macl = MACL;
mac64.m[0] = macl;
mac64.m[1] = mach;
ans = (long long)tempm * (long long)tempn; /* Multiply 32bit * 32bit */
mac64.m64 += ans; /* Accumulate 64bit + 64 bit */
macl = mac64.m[0];
mach = mac64.m[1];
if (S) /* Store only 48 bits of the result */
{
if (mach < 0) /* Result is negative */
{
mach = mach & 0x0000ffff; /* Mask higher 16 bits */
mach |= 0xffff8000; /* Sign extend higher 16 bits */
}
else
mach = mach & 0x00007fff; /* Postive Result */
}
MACL = macl;
MACH = mach;
}
static struct loop_bounds
get_loop_bounds (rs, re, memory, mem_end, maskw, endianw)
int rs, re;