diff options
| author | Richard Stallman <rms@gnu.org> | 1993-06-28 17:51:19 +0000 |
|---|---|---|
| committer | Richard Stallman <rms@gnu.org> | 1993-06-28 17:51:19 +0000 |
| commit | e58d5c618e71aad29c552a33e22056b1453f73fc (patch) | |
| tree | 70b9596cd653891e1d483cf7a9a52e6d7190709d /gcc/config/i860/i860.c | |
| parent | d7473723961b29eb3e6c99079f7e427e2417794e (diff) | |
| download | gcc-e58d5c618e71aad29c552a33e22056b1453f73fc.zip gcc-e58d5c618e71aad29c552a33e22056b1453f73fc.tar.gz gcc-e58d5c618e71aad29c552a33e22056b1453f73fc.tar.bz2 | |
(output_move_double): Handle reg[n,n+1] = mem[reg[n] + reg[n+1]].
From-SVN: r4786
Diffstat (limited to 'gcc/config/i860/i860.c')
| -rw-r--r-- | gcc/config/i860/i860.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/gcc/config/i860/i860.c b/gcc/config/i860/i860.c index 0652e08..e8f20cc 100644 --- a/gcc/config/i860/i860.c +++ b/gcc/config/i860/i860.c @@ -680,6 +680,19 @@ output_move_double (operands) else if (optype0 == REGOP && optype1 != REGOP && reg_overlap_mentioned_p (operands[0], operands[1])) { + if (reg_mentioned_p (op0, XEXP (op1, 0)) + && reg_mentioned_p (latehalf[0], XEXP (op1, 0))) + { + /* If both halves of dest are used in the src memory address, + add the two regs and put them in the low reg (op0). + Then it works to load latehalf first. */ + rtx xops[2]; + xops[0] = latehalf[0]; + xops[1] = op0; + output_asm_insn ("adds %1,%0,%1", xops); + operands[1] = gen_rtx (MEM, DImode, latehalf[0]); + latehalf[1] = adj_offsettable_operand (operands[1], 4); + } /* Do the late half first. */ output_asm_insn (singlemove_string (latehalf), latehalf); /* Then clobber. */ |