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[PATCH, moxie, sim] Add mul.x and umul.x instruction support
- From: Anthony Green <green at moxielogic dot com>
- To: gdb-patches at sourceware dot org
- Date: Wed, 24 Dec 2014 08:36:19 -0500
- Subject: [PATCH, moxie, sim] Add mul.x and umul.x instruction support
- Authentication-results: sourceware.org; auth=none
This patch adds support for the new mul.x and umul.x instructions for
the moxie simulator. I'm checking this in.
Thanks,
AG
>From sim/moxie/ChangeLog
2014-12-24 Anthony Green <green@moxielogic.com>
* interp.c (sim_resume): Add mul.x and umul.x instructions.
diff --git a/sim/moxie/interp.c b/sim/moxie/interp.c
index fdb6528..f57d166 100644
--- a/sim/moxie/interp.c
+++ b/sim/moxie/interp.c
@@ -622,8 +622,30 @@ sim_resume (sd, step, siggnal)
cpu.asregs.regs[a] = (int) bv & 0xffff;
}
break;
- case 0x14: /* bad */
- case 0x15: /* bad */
+ case 0x14: /* mul.x */
+ {
+ int a = (inst >> 4) & 0xf;
+ int b = inst & 0xf;
+ unsigned av = cpu.asregs.regs[a];
+ unsigned bv = cpu.asregs.regs[b];
+ TRACE("mul.x");
+ signed long long r =
+ (signed long long) av * (signed long long) bv;
+ cpu.asregs.regs[a] = r >> 32;
+ }
+ break;
+ case 0x15: /* umul.x */
+ {
+ int a = (inst >> 4) & 0xf;
+ int b = inst & 0xf;
+ unsigned av = cpu.asregs.regs[a];
+ unsigned bv = cpu.asregs.regs[b];
+ TRACE("umul.x");
+ unsigned long long r =
+ (unsigned long long) av * (unsigned long long) bv;
+ cpu.asregs.regs[a] = r >> 32;
+ }
+ break;
case 0x16: /* bad */
case 0x17: /* bad */
case 0x18: /* bad */