diff options
| author | Jeff Law <law@redhat.com> | 1998-02-25 08:58:23 +0000 |
|---|---|---|
| committer | Jeff Law <law@redhat.com> | 1998-02-25 08:58:23 +0000 |
| commit | 097e6924c2d28d8171eaa4665b9dab9e63c8a967 (patch) | |
| tree | 44e08b5e39ff8e70e12b00de5eb1fdee1e2accc0 /sim | |
| parent | c248113005c23176daaa3bc521ee40d0e832f5e4 (diff) | |
| download | gdb-097e6924c2d28d8171eaa4665b9dab9e63c8a967.zip gdb-097e6924c2d28d8171eaa4665b9dab9e63c8a967.tar.gz gdb-097e6924c2d28d8171eaa4665b9dab9e63c8a967.tar.bz2 | |
* simops.c (signed multiply instructions): Cast input operands to
signed32 before casting them to signed64 so that the sign bit
is propagated properly.
Diffstat (limited to 'sim')
| -rw-r--r-- | sim/mn10300/ChangeLog | 6 | ||||
| -rw-r--r-- | sim/mn10300/simops.c | 20 |
2 files changed, 16 insertions, 10 deletions
diff --git a/sim/mn10300/ChangeLog b/sim/mn10300/ChangeLog index ad4abf2..cc4a1b5 100644 --- a/sim/mn10300/ChangeLog +++ b/sim/mn10300/ChangeLog @@ -1,3 +1,9 @@ +Wed Feb 25 01:59:29 1998 Jeffrey A Law (law@cygnus.com) + + * simops.c (signed multiply instructions): Cast input operands to + signed32 before casting them to signed64 so that the sign bit + is propagated properly. + Mon Feb 23 20:23:19 1998 Mark Alexander <marka@cygnus.com> * Makefile.in: Last change was bad. Define NL_TARGET diff --git a/sim/mn10300/simops.c b/sim/mn10300/simops.c index efed7dc..6425e49 100644 --- a/sim/mn10300/simops.c +++ b/sim/mn10300/simops.c @@ -1433,8 +1433,8 @@ void OP_F240 (insn, extension) unsigned long long temp; int n, z; - temp = ((signed64)State.regs[REG_D0 + REG0 (insn)] - * (signed64)State.regs[REG_D0 + REG1 (insn)]); + temp = ((signed64)(signed32)State.regs[REG_D0 + REG0 (insn)] + * (signed64)(signed32)State.regs[REG_D0 + REG1 (insn)]); State.regs[REG_D0 + REG0 (insn)] = temp & 0xffffffff; State.regs[REG_MDR] = (temp & 0xffffffff00000000LL) >> 32;; z = (State.regs[REG_D0 + REG0 (insn)] == 0); @@ -3061,8 +3061,8 @@ void OP_F600 (insn, extension) unsigned long long temp; int n, z; - temp = ((signed64)State.regs[REG_D0 + REG0 (insn)] - * (signed64)State.regs[REG_D0 + REG1 (insn)]); + temp = ((signed64)(signed32)State.regs[REG_D0 + REG0 (insn)] + * (signed64)(signed32)State.regs[REG_D0 + REG1 (insn)]); State.regs[REG_D0 + REG0 (insn)] = temp & 0xffffffff; State.regs[REG_MDRQ] = (temp & 0xffffffff00000000LL) >> 32;; z = (State.regs[REG_D0 + REG0 (insn)] == 0); @@ -3078,8 +3078,8 @@ void OP_F90000 (insn, extension) unsigned long long temp; int n, z; - temp = ((signed64)State.regs[REG_D0 + REG0_8 (insn)] - * (signed64)SEXT8 (insn & 0xff)); + temp = ((signed64)(signed32)State.regs[REG_D0 + REG0_8 (insn)] + * (signed64)(signed32)SEXT8 (insn & 0xff)); State.regs[REG_D0 + REG0_8 (insn)] = temp & 0xffffffff; State.regs[REG_MDRQ] = (temp & 0xffffffff00000000LL) >> 32;; z = (State.regs[REG_D0 + REG0_8 (insn)] == 0); @@ -3095,8 +3095,8 @@ void OP_FB000000 (insn, extension) unsigned long long temp; int n, z; - temp = ((signed64)State.regs[REG_D0 + REG0_16 (insn)] - * (signed64)SEXT16 (insn & 0xffff)); + temp = ((signed64)(signed32)State.regs[REG_D0 + REG0_16 (insn)] + * (signed64)(signed32)SEXT16 (insn & 0xffff)); State.regs[REG_D0 + REG0_16 (insn)] = temp & 0xffffffff; State.regs[REG_MDRQ] = (temp & 0xffffffff00000000LL) >> 32;; z = (State.regs[REG_D0 + REG0_16 (insn)] == 0); @@ -3112,8 +3112,8 @@ void OP_FD000000 (insn, extension) unsigned long long temp; int n, z; - temp = ((signed64)State.regs[REG_D0 + REG0_16 (insn)] - * (signed64)(((insn & 0xffff) << 16) + extension)); + temp = ((signed64)(signed32)State.regs[REG_D0 + REG0_16 (insn)] + * (signed64)(signed32)(((insn & 0xffff) << 16) + extension)); State.regs[REG_D0 + REG0_16 (insn)] = temp & 0xffffffff; State.regs[REG_MDRQ] = (temp & 0xffffffff00000000LL) >> 32;; z = (State.regs[REG_D0 + REG0_16 (insn)] == 0); |