diff options
Diffstat (limited to 'src/cmd/internal')
| -rw-r--r-- | src/cmd/internal/obj/mips/asm0.go | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/cmd/internal/obj/mips/asm0.go b/src/cmd/internal/obj/mips/asm0.go index 458e071e47..c117269c35 100644 --- a/src/cmd/internal/obj/mips/asm0.go +++ b/src/cmd/internal/obj/mips/asm0.go @@ -1120,9 +1120,11 @@ func (c *ctxt0) asmout(p *obj.Prog, o *Optab, out []uint32) { case 1: /* mov r1,r2 ==> OR r1,r0,r2 */ a := AOR if p.As == AMOVW && c.ctxt.Arch.Family == sys.MIPS64 { - a = AADDU // sign-extended to high 32 bits + // on MIPS64, most of the 32-bit instructions have unpredictable behavior, + // but SLL is special that the result is always sign-extended to 64-bit. + a = ASLL } - o1 = OP_RRR(c.oprrr(a), uint32(REGZERO), uint32(p.From.Reg), uint32(p.To.Reg)) + o1 = OP_RRR(c.oprrr(a), uint32(p.From.Reg), uint32(REGZERO), uint32(p.To.Reg)) case 2: /* add/sub r1,[r2],r3 */ r := int(p.Reg) |