+
+/* Emit an scc insn. For seq, sne, sgeu, and sltu, we can do this
+ without jumps using the addx/subx instructions. */
+
+bool
+emit_scc_insn (rtx operands[])
+{
+ rtx tem;
+ rtx x;
+ rtx y;
+ enum rtx_code code;
+
+ /* The quad-word fp compare library routines all return nonzero to indicate
+ true, which is different from the equivalent libgcc routines, so we must
+ handle them specially here. */
+ if (GET_MODE (operands[2]) == TFmode && ! TARGET_HARD_QUAD)
+ {
+ operands[1] = sparc_emit_float_lib_cmp (operands[2], operands[3],
+ GET_CODE (operands[1]));
+ operands[2] = XEXP (operands[1], 0);
+ operands[3] = XEXP (operands[1], 1);
+ }
+
+ code = GET_CODE (operands[1]);
+ x = operands[2];
+ y = operands[3];
+
+ /* For seq/sne on v9 we use the same code as v8 (the addx/subx method has
+ more applications). The exception to this is "reg != 0" which can
+ be done in one instruction on v9 (so we do it). */
+ if (code == EQ)
+ {
+ if (GET_MODE (x) == SImode)
+ {
+ rtx pat = gen_seqsi_special (operands[0], x, y);
+ emit_insn (pat);
+ return true;
+ }
+ else if (GET_MODE (x) == DImode)
+ {
+ rtx pat = gen_seqdi_special (operands[0], x, y);
+ emit_insn (pat);
+ return true;
+ }
+ }
+
+ if (code == NE)
+ {
+ if (GET_MODE (x) == SImode)
+ {
+ rtx pat = gen_snesi_special (operands[0], x, y);
+ emit_insn (pat);
+ return true;
+ }
+ else if (GET_MODE (x) == DImode)
+ {
+ rtx pat = gen_snedi_special (operands[0], x, y);
+ emit_insn (pat);
+ return true;
+ }
+ }
+
+ /* For the rest, on v9 we can use conditional moves. */
+
+ if (TARGET_V9)
+ {
+ if (gen_v9_scc (operands[0], code, x, y))
+ return true;
+ }
+
+ /* We can do LTU and GEU using the addx/subx instructions too. And
+ for GTU/LEU, if both operands are registers swap them and fall
+ back to the easy case. */
+ if (code == GTU || code == LEU)
+ {
+ if ((GET_CODE (x) == REG || GET_CODE (x) == SUBREG)
+ && (GET_CODE (y) == REG || GET_CODE (y) == SUBREG))
+ {
+ tem = x;
+ x = y;
+ y = tem;
+ code = swap_condition (code);
+ }
+ }
+
+ if (code == LTU || code == GEU)
+ {
+ emit_insn (gen_rtx_SET (VOIDmode, operands[0],
+ gen_rtx_fmt_ee (code, SImode,
+ gen_compare_reg_1 (code, x, y),
+ const0_rtx)));
+ return true;
+ }
+
+ /* Nope, do branches. */
+ return false;
+}
+