diff options
Diffstat (limited to 'gcc/reg-stack.c')
| -rw-r--r-- | gcc/reg-stack.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/gcc/reg-stack.c b/gcc/reg-stack.c index 31ebddb4640..f238267987a 100644 --- a/gcc/reg-stack.c +++ b/gcc/reg-stack.c @@ -1768,6 +1768,60 @@ subst_stack_regs_pat (rtx insn, stack regstack, rtx pat) replace_reg (dest, FIRST_STACK_REG); break; + case UNSPEC_SINCOS_COS: + /* These insns operate on the top two stack slots, + first part of one input, double output insn. */ + + src1 = get_true_reg (&XVECEXP (pat_src, 0, 0)); + + emit_swap_insn (insn, regstack, *src1); + + src1_note = find_regno_note (insn, REG_DEAD, REGNO (*src1)); + + /* Push the result back onto stack. Empty stack slot + will be filled in second part of insn. */ + if (STACK_REG_P (*dest)) { + regstack->reg[regstack->top + 1] = REGNO (*dest); + SET_HARD_REG_BIT (regstack->reg_set, REGNO (*dest)); + replace_reg (dest, FIRST_STACK_REG); + } + + if (src1_note) + { + replace_reg (&XEXP (src1_note, 0), FIRST_STACK_REG); + regstack->top--; + CLEAR_HARD_REG_BIT (regstack->reg_set, REGNO (*src1)); + } + replace_reg (src1, FIRST_STACK_REG); + break; + + case UNSPEC_SINCOS_SIN: + src1 = get_true_reg (&XVECEXP (pat_src, 0, 0)); + + emit_swap_insn (insn, regstack, *src1); + + src1_note = find_regno_note (insn, REG_DEAD, REGNO (*src1)); + + /* Push the result back onto stack. Fill empty slot from + first part of insn and fix top of stack pointer. */ + if (STACK_REG_P (*dest)) { + regstack->reg[regstack->top] = REGNO (*dest); + SET_HARD_REG_BIT (regstack->reg_set, REGNO (*dest)); + replace_reg (dest, FIRST_STACK_REG + 1); + + regstack->top++; + } + + if (src1_note) + { + replace_reg (&XEXP (src1_note, 0), FIRST_STACK_REG); + regstack->top--; + CLEAR_HARD_REG_BIT (regstack->reg_set, REGNO (*src1)); + } + + replace_reg (src1, FIRST_STACK_REG); + break; + case UNSPEC_SAHF: /* (unspec [(unspec [(compare)] UNSPEC_FNSTSW)] UNSPEC_SAHF) The combination matches the PPRO fcomi instruction. */ |