rl78.c (rl78_expand_prologue): Save the MDUC related registers in all interrupt handlers if necessary.
* config/rl78/rl78.c (rl78_expand_prologue): Save the MDUC related registers in all interrupt handlers if necessary. (rl78_option_override): Add warning. (MUST_SAVE_MDUC_REGISTERS): New macro. (rl78_expand_epilogue): Restore the MDUC registers if necessary. * config/rl78/rl78.c (check_mduc_usage): New function. (mduc_regs): New structure to hold MDUC register data. * config/rl78/rl78.md (is_g13_muldiv_insn): New attribute. (mulsi3_g13): Add is_g13_muldiv_insn attribute. (udivmodsi4_g13): Add is_g13_muldiv_insn attribute. (mulhi3_g13): Add is_g13_muldiv_insn attribute. * config/rl78/rl78.opt (msave-mduc-in-interrupts): New option. * doc/invoke.texi (RL78 Options): Add -msave-mduc-in-interrupts. From-SVN: r236027
This commit is contained in:
Kaushik Phatak
Nick Clifton
parent
18caa34eb2
commit
035b8879ac
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@ -1,3 +1,19 @@
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2016-05-09 Kaushik Phatak <kaushik.phatak@kpit.com>
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* config/rl78/rl78.c (rl78_expand_prologue): Save the MDUC related
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registers in all interrupt handlers if necessary.
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(rl78_option_override): Add warning.
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(MUST_SAVE_MDUC_REGISTERS): New macro.
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(rl78_expand_epilogue): Restore the MDUC registers if necessary.
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* config/rl78/rl78.c (check_mduc_usage): New function.
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(mduc_regs): New structure to hold MDUC register data.
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* config/rl78/rl78.md (is_g13_muldiv_insn): New attribute.
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(mulsi3_g13): Add is_g13_muldiv_insn attribute.
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(udivmodsi4_g13): Add is_g13_muldiv_insn attribute.
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(mulhi3_g13): Add is_g13_muldiv_insn attribute.
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* config/rl78/rl78.opt (msave-mduc-in-interrupts): New option.
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* doc/invoke.texi (RL78 Options): Add -msave-mduc-in-interrupts.
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2016-05-09 Bin Cheng <bin.cheng@arm.com>
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* tree-if-conv.c (tree-ssa-loop.h): Include header file.
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@ -76,6 +76,23 @@ static const char * const word_regnames[] =
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"sp", "ap", "psw", "es", "cs"
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};
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/* Structure for G13 MDUC registers. */
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struct mduc_reg_type
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{
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unsigned int address;
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enum machine_mode mode;
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};
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struct mduc_reg_type mduc_regs[] =
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{
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{0xf00e8, QImode},
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{0xffff0, HImode},
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{0xffff2, HImode},
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{0xf2224, HImode},
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{0xf00e0, HImode},
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{0xf00e2, HImode}
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};
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struct GTY(()) machine_function
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{
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/* If set, the rest of the fields have been computed. */
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@ -317,6 +334,10 @@ rl78_output_symbol_ref (FILE * file, rtx sym)
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#undef TARGET_OPTION_OVERRIDE
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#define TARGET_OPTION_OVERRIDE rl78_option_override
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#define MUST_SAVE_MDUC_REGISTERS \
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(TARGET_SAVE_MDUC_REGISTERS \
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&& (is_interrupt_func (NULL_TREE)) && RL78_MUL_G13)
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static void
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rl78_option_override (void)
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{
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@ -344,6 +365,9 @@ rl78_option_override (void)
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/* Address spaces are currently only supported by C. */
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error ("-mes0 can only be used with C");
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if (TARGET_SAVE_MDUC_REGISTERS && !(TARGET_G13 || RL78_MUL_G13))
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warning (0, "mduc registers only saved for G13 target");
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switch (rl78_cpu_type)
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{
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case CPU_UNINIT:
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@ -1257,13 +1281,34 @@ rl78_initial_elimination_offset (int from, int to)
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return rv;
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}
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static int
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static bool
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rl78_is_naked_func (void)
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{
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return (lookup_attribute ("naked", DECL_ATTRIBUTES (current_function_decl)) != NULL_TREE);
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}
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/* Check if the block uses mul/div insns for G13 target. */
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static bool
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check_mduc_usage (void)
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{
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rtx_insn * insn;
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basic_block bb;
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FOR_EACH_BB_FN (bb, cfun)
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{
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FOR_BB_INSNS (bb, insn)
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{
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if (INSN_P (insn)
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&& (get_attr_is_g13_muldiv_insn (insn) == IS_G13_MULDIV_INSN_YES))
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return true;
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}
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}
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return false;
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}
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/* Expand the function prologue (from the prologue pattern). */
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void
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rl78_expand_prologue (void)
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{
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@ -1278,6 +1323,9 @@ rl78_expand_prologue (void)
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/* Always re-compute the frame info - the register usage may have changed. */
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rl78_compute_frame_info ();
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if (MUST_SAVE_MDUC_REGISTERS && (!crtl->is_leaf || check_mduc_usage ()))
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cfun->machine->framesize += ARRAY_SIZE (mduc_regs) * 2;
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if (flag_stack_usage_info)
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current_function_static_stack_size = cfun->machine->framesize;
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@ -1327,6 +1375,24 @@ rl78_expand_prologue (void)
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F (emit_insn (gen_push (ax)));
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}
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/* Save MDUC registers inside interrupt routine. */
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if (MUST_SAVE_MDUC_REGISTERS && (!crtl->is_leaf || check_mduc_usage ()))
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{
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for (int i = 0; i < ARRAY_SIZE (mduc_regs); i++)
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{
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mduc_reg_type *reg = mduc_regs + i;
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rtx mem_mduc = gen_rtx_MEM (reg->mode, GEN_INT (reg->address));
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MEM_VOLATILE_P (mem_mduc) = 1;
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if (reg->mode == QImode)
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emit_insn (gen_movqi (gen_rtx_REG (QImode, A_REG), mem_mduc));
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else
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emit_insn (gen_movhi (gen_rtx_REG (HImode, AX_REG), mem_mduc));
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emit_insn (gen_push (gen_rtx_REG (HImode, AX_REG)));
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}
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}
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if (frame_pointer_needed)
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{
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F (emit_move_insn (ax, sp));
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@ -1400,6 +1466,23 @@ rl78_expand_epilogue (void)
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}
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}
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/* Restore MDUC registers from interrupt routine. */
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if (MUST_SAVE_MDUC_REGISTERS && (!crtl->is_leaf || check_mduc_usage ()))
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{
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for (int i = ARRAY_SIZE (mduc_regs) - 1; i >= 0; i--)
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{
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mduc_reg_type *reg = mduc_regs + i;
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rtx mem_mduc = gen_rtx_MEM (reg->mode, GEN_INT (reg->address));
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emit_insn (gen_pop (gen_rtx_REG (HImode, AX_REG)));
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MEM_VOLATILE_P (mem_mduc) = 1;
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if (reg->mode == QImode)
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emit_insn (gen_movqi (mem_mduc, gen_rtx_REG (QImode, A_REG)));
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else
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emit_insn (gen_movhi (mem_mduc, gen_rtx_REG (HImode, AX_REG)));
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}
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}
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if (is_interrupt_func (cfun->decl) && cfun->machine->uses_es)
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{
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emit_insn (gen_pop (gen_rtx_REG (HImode, AX_REG)));
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@ -1495,6 +1578,9 @@ rl78_start_function (FILE *file, HOST_WIDE_INT hwi_local ATTRIBUTE_UNUSED)
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if (cfun->machine->uses_es)
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fprintf (file, "\t; uses ES register\n");
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if (MUST_SAVE_MDUC_REGISTERS)
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fprintf (file, "\t; preserves MDUC registers\n");
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}
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/* Return an RTL describing where a function return value of type RET_TYPE
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@ -67,6 +67,7 @@
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(include "rl78-virt.md")
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(include "rl78-real.md")
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(define_attr "is_g13_muldiv_insn" "yes,no" (const_string "no"))
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;; Function Prologue/Epilogue Instructions
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@ -379,7 +380,8 @@
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movw ax, 0xffff6 ; MDBL
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movw %h0, ax
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; end of mulhi macro"
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[(set_attr "valloc" "macax")]
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[(set_attr "valloc" "macax")
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(set_attr "is_g13_muldiv_insn" "yes")]
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)
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;; 0xFFFF0 is MACR(L). 0xFFFF2 is MACR(H) but we don't care about it
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@ -459,7 +461,8 @@
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movw ax, !0xf00e0 ; MDCL
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movw %H0, ax
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; end of mulsi macro"
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[(set_attr "valloc" "macax")]
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[(set_attr "valloc" "macax")
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(set_attr "is_g13_muldiv_insn" "yes")]
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)
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(define_expand "udivmodhi4"
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@ -692,5 +695,6 @@
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movw %H3, ax \n\
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; end of udivmodsi macro";
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}
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[(set_attr "valloc" "macax")]
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[(set_attr "valloc" "macax")
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(set_attr "is_g13_muldiv_insn" "yes")]
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)
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@ -91,3 +91,7 @@ Alias for -mcpu=g14.
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mes0
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Target Mask(ES0)
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Assume ES is zero throughout program execution, use ES: for read-only data.
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msave-mduc-in-interrupts
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Target Mask(SAVE_MDUC_REGISTERS)
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Stores the MDUC registers in interrupt handlers for G13 target.
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@ -947,7 +947,7 @@ See RS/6000 and PowerPC Options.
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@emph{RL78 Options}
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@gccoptlist{-msim -mmul=none -mmul=g13 -mmul=g14 -mallregs @gol
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-mcpu=g10 -mcpu=g13 -mcpu=g14 -mg10 -mg13 -mg14 @gol
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-m64bit-doubles -m32bit-doubles}
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-m64bit-doubles -m32bit-doubles -msave-mduc-in-interrupts}
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@emph{RS/6000 and PowerPC Options}
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@gccoptlist{-mcpu=@var{cpu-type} @gol
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@ -19783,6 +19783,20 @@ Make the @code{double} data type be 64 bits (@option{-m64bit-doubles})
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or 32 bits (@option{-m32bit-doubles}) in size. The default is
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@option{-m32bit-doubles}.
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@item -msave-mduc-in-interrupts
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@item -mno-save-mduc-in-interrupts
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@opindex msave-mduc-in-interrupts
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@opindex mno-save-mduc-in-interrupts
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Specifies that interrupt handler functions should preserve the
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MDUC registers. This is only necessary if normal code might use
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the MDUC registers, for example because it performs multiplication
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and division operations. The default is to ignore the MDUC registers
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as this makes the interrupt handlers faster. The target option -mg13
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needs to be passed for this to work as this feature is only available
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on the G13 target (S2 core). The MDUC registers will only be saved
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if the interrupt handler performs a multiplication or division
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operation or it calls another function.
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@end table
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@node RS/6000 and PowerPC Options
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