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authorMichael Snyder <msnyder@vmware.com>2003-08-11 19:28:05 +0000
committerMichael Snyder <msnyder@vmware.com>2003-08-11 19:28:05 +0000
commitd1789acece69deabeddae520341aa828d5a96c7f (patch)
treefbdf96d7dbb1c2453cf149d57415fde69764c971 /sim/sh
parentb246147cd381994da11d762f3e204a97ec00ef9a (diff)
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2003-08-11 Shrinivas Atre <shrinivasa@KPITCummins.com>
* 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.
Diffstat (limited to 'sim/sh')
-rw-r--r--sim/sh/ChangeLog6
-rw-r--r--sim/sh/gencode.c5
-rw-r--r--sim/sh/interp.c52
3 files changed, 60 insertions, 3 deletions
diff --git a/sim/sh/ChangeLog b/sim/sh/ChangeLog
index 9f0eb85..7ab1394 100644
--- a/sim/sh/ChangeLog
+++ b/sim/sh/ChangeLog
@@ -1,3 +1,9 @@
+2003-08-11 Shrinivas Atre <shrinivasa@KPITCummins.com>
+ * 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.
+
2003-08-07 Michael Snyder <msnyder@redhat.com>
* gencode.c (expand_ppi_code): Comment spelling fix.
diff --git a/sim/sh/gencode.c b/sim/sh/gencode.c
index fb6f5b2..a4a1c2d 100644
--- a/sim/sh/gencode.c
+++ b/sim/sh/gencode.c
@@ -580,12 +580,11 @@ op tab[] =
},
{ "nm", "nm", "mac.l @<REG_M>+,@<REG_N>+", "0000nnnnmmmm1111",
- "trap (255, R0, PC, memory, maskl, maskw, endianw);",
- "/* FIXME: mac.l support */",
+ "macl(&R0,memory,n,m);",
},
{ "nm", "nm", "mac.w @<REG_M>+,@<REG_N>+", "0100nnnnmmmm1111",
- "macw(R0,memory,n,m,endianw);",
+ "macw(&R0,memory,n,m,endianw);",
},
{ "n", "", "mov #<imm>,<REG_N>", "1110nnnni8*1....",
diff --git a/sim/sh/interp.c b/sim/sh/interp.c
index 887b7a6..91899f4 100644
--- a/sim/sh/interp.c
+++ b/sim/sh/interp.c
@@ -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;