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rl78.c (rl78_expand_prologue): In G10 mode push the BC, DE and HL registers directly, not via AX.

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* 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
This commit is contained in:
Nick Clifton 2015-01-27 11:37:08 +00:00 committed by Nick Clifton
parent 8410904a77
commit eb42aba984
2 changed files with 67 additions and 27 deletions
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9
gcc/ChangeLog
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@ -1,3 +1,12 @@
2015-01-27 Nick Clifton <nickc@redhat.com>
* 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.
2015-01-27 Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
* config/i386/sysv4.h (CRT_GET_RFIB_DATA): Remove.

69
gcc/config/rl78/rl78.c
View File

@ -1235,6 +1235,7 @@ rl78_expand_prologue (void)
{
int i, fs;
rtx sp = gen_rtx_REG (HImode, STACK_POINTER_REGNUM);
rtx ax = gen_rtx_REG (HImode, AX_REG);
int rb = 0;
if (rl78_is_naked_func ())
@ -1258,24 +1259,28 @@ rl78_expand_prologue (void)
for (i = 0; i < 16; i++)
if (cfun->machine->need_to_push [i])
{
int reg = i * 2;
if (TARGET_G10)
{
if (i != 0)
emit_move_insn (gen_rtx_REG (HImode, AX_REG), gen_rtx_REG (HImode, i * 2));
F (emit_insn (gen_push (gen_rtx_REG (HImode, AX_REG))));
if (reg >= 8)
{
emit_move_insn (ax, gen_rtx_REG (HImode, reg));
reg = AX_REG;
}
}
else
{
int need_bank = i / 4;
int need_bank = i/4;
if (need_bank != rb)
{
emit_insn (gen_sel_rb (GEN_INT (need_bank)));
rb = need_bank;
}
F (emit_insn (gen_push (gen_rtx_REG (HImode, i * 2))));
}
F (emit_insn (gen_push (gen_rtx_REG (HImode, reg))));
}
if (rb != 0)
@ -1285,24 +1290,42 @@ rl78_expand_prologue (void)
if (is_interrupt_func (cfun->decl) && cfun->machine->uses_es)
{
emit_insn (gen_movqi_from_es (gen_rtx_REG (QImode, A_REG)));
F (emit_insn (gen_push (gen_rtx_REG (HImode, AX_REG))));
F (emit_insn (gen_push (ax)));
}
if (frame_pointer_needed)
{
F (emit_move_insn (gen_rtx_REG (HImode, AX_REG),
gen_rtx_REG (HImode, STACK_POINTER_REGNUM)));
F (emit_move_insn (gen_rtx_REG (HImode, FRAME_POINTER_REGNUM),
gen_rtx_REG (HImode, AX_REG)));
F (emit_move_insn (ax, sp));
F (emit_move_insn (gen_rtx_REG (HImode, FRAME_POINTER_REGNUM), ax));
}
fs = cfun->machine->framesize_locals + cfun->machine->framesize_outgoing;
if (fs > 0)
{
/* If we need to subtract more than 254*3 then it is faster and
smaller to move SP into AX and perform the subtraction there. */
if (fs > 254 * 3)
{
rtx insn;
emit_move_insn (ax, sp);
emit_insn (gen_subhi3 (ax, ax, GEN_INT (fs)));
insn = emit_move_insn (sp, ax);
add_reg_note (insn, REG_FRAME_RELATED_EXPR,
gen_rtx_SET (SImode, sp,
gen_rtx_PLUS (HImode, sp, GEN_INT (-fs))));
}
else
{
while (fs > 0)
{
int fs_byte = (fs > 254) ? 254 : fs;
F (emit_insn (gen_subhi3 (sp, sp, GEN_INT (fs_byte))));
fs -= fs_byte;
}
}
}
}
/* Expand the function epilogue (from the epilogue pattern). */
@ -1311,6 +1334,7 @@ rl78_expand_epilogue (void)
{
int i, fs;
rtx sp = gen_rtx_REG (HImode, STACK_POINTER_REGNUM);
rtx ax = gen_rtx_REG (HImode, AX_REG);
int rb = 0;
if (rl78_is_naked_func ())
@ -1318,14 +1342,20 @@ rl78_expand_epilogue (void)
if (frame_pointer_needed)
{
emit_move_insn (gen_rtx_REG (HImode, AX_REG),
gen_rtx_REG (HImode, FRAME_POINTER_REGNUM));
emit_move_insn (gen_rtx_REG (HImode, STACK_POINTER_REGNUM),
gen_rtx_REG (HImode, AX_REG));
emit_move_insn (ax, gen_rtx_REG (HImode, FRAME_POINTER_REGNUM));
emit_move_insn (sp, ax);
}
else
{
fs = cfun->machine->framesize_locals + cfun->machine->framesize_outgoing;
if (fs > 254 * 3)
{
emit_move_insn (ax, sp);
emit_insn (gen_addhi3 (ax, ax, GEN_INT (fs)));
emit_move_insn (sp, ax);
}
else
{
while (fs > 0)
{
int fs_byte = (fs > 254) ? 254 : fs;
@ -1334,6 +1364,7 @@ rl78_expand_epilogue (void)
fs -= fs_byte;
}
}
}
if (is_interrupt_func (cfun->decl) && cfun->machine->uses_es)
{
@ -1348,11 +1379,11 @@ rl78_expand_epilogue (void)
if (TARGET_G10)
{
rtx ax = gen_rtx_REG (HImode, AX_REG);
emit_insn (gen_pop (ax));
if (i != 0)
if (i < 8)
emit_insn (gen_pop (dest));
else
{
emit_insn (gen_pop (ax));
emit_move_insn (dest, ax);
/* Generate a USE of the pop'd register so that DCE will not eliminate the move. */
emit_insn (gen_use (dest));