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Fix endian problems with ld.d/st.d

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This commit is contained in:
Michael Meissner 1997-05-12 02:04:02 +00:00
parent 450be2349a
commit 8ad6078850
2 changed files with 9 additions and 2 deletions
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1
sim/tic80/ChangeLog
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@ -11,6 +11,7 @@ Sun May 11 10:25:14 1997 Michael Meissner <meissner@cygnus.com>
instead of TRACE_ALU2.
(sl r): Use EndMask as is, instead of using Source+1 register.
(subu): Operands are unsigned, not signed.
(do_{ld,st}): Fix endian problems with ld.d/st.d.
Sat May 10 12:35:47 1997 Michael Meissner <meissner@cygnus.com>

10
sim/tic80/insns
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@ -633,6 +633,7 @@ instruction_address::function::do_jsr:instruction_address nia, signed32 *rLink,
// ld[{.b.h.d}]
void::function::do_ld:int Dest, unsigned32 Base, unsigned32 *rBase, int m , int sz, int S, unsigned32 Offset
unsigned32 addr;
unsigned64 u64;
switch (sz)
{
case 0:
@ -660,7 +661,9 @@ void::function::do_ld:int Dest, unsigned32 Base, unsigned32 *rBase, int m , int
addr = Base + (S ? (Offset << 3) : Offset);
if (m)
*rBase = addr;
*(unsigned64*)(&GPR(Dest)) = MEM (signed, addr, 8);
u64 = MEM (signed, addr, 8);
GPR(Dest) = (unsigned32) u64;
GPR(Dest+1) = (unsigned32) (u64 >> 32);
break;
default:
addr = -1;
@ -895,6 +898,7 @@ void::function::do_shift:int Dest, int Source, int Merge, int i, int n, int EndM
// st[{.b|.h|.d}]
void::function::do_st:int Source, unsigned32 Base, unsigned32 *rBase, int m , int sz, int S, unsigned32 Offset
unsigned32 addr;
unsigned64 u64;
switch (sz)
{
case 0:
@ -914,7 +918,9 @@ void::function::do_st:int Source, unsigned32 Base, unsigned32 *rBase, int m , in
engine_error (SD, CPU, cia, "0x%lx: st.d with odd source register %d",
cia.ip, Source);
addr = Base + (S ? (Offset << 3) : Offset);
STORE (addr, 8, *(unsigned64*)&GPR(Source));
u64 = GPR (Source);
u64 |= (((unsigned64) GPR (Source+1)) << 32);
STORE (addr, 8, u64);
break;
default:
addr = -1;