rl78.c (rl78_expand_prologue): In G10 mode push the BC, DE and HL registers directly, not via AX.
* config/rl78/rl78.c (rl78_expand_prologue): In G10 mode push the BC, DE and HL registers directly, not via AX. When decrementing the stack pointer by a large amount, transfer SP into AX and perform the subtraction there. (rl78_expand_epilogue): Perform the inverse of the above enhancements. From-SVN: r220163
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@ -1,3 +1,12 @@
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2015-01-27 Nick Clifton <nickc@redhat.com>
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* config/rl78/rl78.c (rl78_expand_prologue): In G10 mode push the
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BC, DE and HL registers directly, not via AX.
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When decrementing the stack pointer by a large amount, transfer SP
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into AX and perform the subtraction there.
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(rl78_expand_epilogue): Perform the inverse of the above
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enhancements.
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2015-01-27 Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
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* config/i386/sysv4.h (CRT_GET_RFIB_DATA): Remove.
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@ -1235,6 +1235,7 @@ rl78_expand_prologue (void)
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{
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int i, fs;
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rtx sp = gen_rtx_REG (HImode, STACK_POINTER_REGNUM);
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rtx ax = gen_rtx_REG (HImode, AX_REG);
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int rb = 0;
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if (rl78_is_naked_func ())
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@ -1258,24 +1259,28 @@ rl78_expand_prologue (void)
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for (i = 0; i < 16; i++)
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if (cfun->machine->need_to_push [i])
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{
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int reg = i * 2;
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if (TARGET_G10)
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{
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if (i != 0)
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emit_move_insn (gen_rtx_REG (HImode, AX_REG), gen_rtx_REG (HImode, i * 2));
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F (emit_insn (gen_push (gen_rtx_REG (HImode, AX_REG))));
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if (reg >= 8)
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{
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emit_move_insn (ax, gen_rtx_REG (HImode, reg));
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reg = AX_REG;
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}
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}
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else
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{
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int need_bank = i / 4;
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int need_bank = i/4;
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if (need_bank != rb)
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{
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emit_insn (gen_sel_rb (GEN_INT (need_bank)));
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rb = need_bank;
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}
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F (emit_insn (gen_push (gen_rtx_REG (HImode, i * 2))));
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}
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F (emit_insn (gen_push (gen_rtx_REG (HImode, reg))));
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}
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if (rb != 0)
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@ -1285,23 +1290,41 @@ rl78_expand_prologue (void)
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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_movqi_from_es (gen_rtx_REG (QImode, A_REG)));
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F (emit_insn (gen_push (gen_rtx_REG (HImode, AX_REG))));
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F (emit_insn (gen_push (ax)));
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}
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if (frame_pointer_needed)
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{
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F (emit_move_insn (gen_rtx_REG (HImode, AX_REG),
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gen_rtx_REG (HImode, STACK_POINTER_REGNUM)));
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F (emit_move_insn (gen_rtx_REG (HImode, FRAME_POINTER_REGNUM),
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gen_rtx_REG (HImode, AX_REG)));
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F (emit_move_insn (ax, sp));
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F (emit_move_insn (gen_rtx_REG (HImode, FRAME_POINTER_REGNUM), ax));
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}
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fs = cfun->machine->framesize_locals + cfun->machine->framesize_outgoing;
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while (fs > 0)
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if (fs > 0)
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{
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int fs_byte = (fs > 254) ? 254 : fs;
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F (emit_insn (gen_subhi3 (sp, sp, GEN_INT (fs_byte))));
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fs -= fs_byte;
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/* If we need to subtract more than 254*3 then it is faster and
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smaller to move SP into AX and perform the subtraction there. */
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if (fs > 254 * 3)
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{
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rtx insn;
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emit_move_insn (ax, sp);
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emit_insn (gen_subhi3 (ax, ax, GEN_INT (fs)));
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insn = emit_move_insn (sp, ax);
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add_reg_note (insn, REG_FRAME_RELATED_EXPR,
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gen_rtx_SET (SImode, sp,
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gen_rtx_PLUS (HImode, sp, GEN_INT (-fs))));
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}
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else
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{
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while (fs > 0)
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{
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int fs_byte = (fs > 254) ? 254 : fs;
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F (emit_insn (gen_subhi3 (sp, sp, GEN_INT (fs_byte))));
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fs -= fs_byte;
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}
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}
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}
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}
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@ -1311,6 +1334,7 @@ rl78_expand_epilogue (void)
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{
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int i, fs;
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rtx sp = gen_rtx_REG (HImode, STACK_POINTER_REGNUM);
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rtx ax = gen_rtx_REG (HImode, AX_REG);
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int rb = 0;
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if (rl78_is_naked_func ())
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@ -1318,20 +1342,27 @@ rl78_expand_epilogue (void)
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if (frame_pointer_needed)
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{
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emit_move_insn (gen_rtx_REG (HImode, AX_REG),
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gen_rtx_REG (HImode, FRAME_POINTER_REGNUM));
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emit_move_insn (gen_rtx_REG (HImode, STACK_POINTER_REGNUM),
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gen_rtx_REG (HImode, AX_REG));
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emit_move_insn (ax, gen_rtx_REG (HImode, FRAME_POINTER_REGNUM));
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emit_move_insn (sp, ax);
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}
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else
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{
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fs = cfun->machine->framesize_locals + cfun->machine->framesize_outgoing;
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while (fs > 0)
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if (fs > 254 * 3)
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{
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int fs_byte = (fs > 254) ? 254 : fs;
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emit_move_insn (ax, sp);
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emit_insn (gen_addhi3 (ax, ax, GEN_INT (fs)));
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emit_move_insn (sp, ax);
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}
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else
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{
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while (fs > 0)
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{
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int fs_byte = (fs > 254) ? 254 : fs;
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emit_insn (gen_addhi3 (sp, sp, GEN_INT (fs_byte)));
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fs -= fs_byte;
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emit_insn (gen_addhi3 (sp, sp, GEN_INT (fs_byte)));
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fs -= fs_byte;
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}
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}
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}
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@ -1348,11 +1379,11 @@ rl78_expand_epilogue (void)
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if (TARGET_G10)
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{
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rtx ax = gen_rtx_REG (HImode, AX_REG);
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emit_insn (gen_pop (ax));
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if (i != 0)
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if (i < 8)
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emit_insn (gen_pop (dest));
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else
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{
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emit_insn (gen_pop (ax));
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emit_move_insn (dest, ax);
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/* Generate a USE of the pop'd register so that DCE will not eliminate the move. */
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emit_insn (gen_use (dest));
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