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expr.c (store_constructor): Use store of 0 to indicate value death instead of a clobber.

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* expr.c (store_constructor): Use store of 0 to indicate value
        death instead of a clobber.

        * config/i386/i386.c (ix86_expand_reduc_v4sf): New.
        * config/i386/i386-protos.h (ix86_expand_reduc_v4sf): Declare.
        * config/i386/sse.md (reduc_plus_v4sf): New.
        (reduc_smax_v4sf, reduc_smin_v4sf): New.

From-SVN: r101169
This commit is contained in:
Richard Henderson 2005-06-18 15:40:49 -07:00 committed by Richard Henderson
parent 55d4549de8
commit 2ab1754e1b
5 changed files with 68 additions and 2 deletions
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10
gcc/ChangeLog
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@ -1,3 +1,13 @@
2005-06-18 Richard Henderson <rth@redhat.com>
* expr.c (store_constructor): Use store of 0 to indicate value
death instead of a clobber.
* config/i386/i386.c (ix86_expand_reduc_v4sf): New.
* config/i386/i386-protos.h (ix86_expand_reduc_v4sf): Declare.
* config/i386/sse.md (reduc_plus_v4sf): New.
(reduc_smax_v4sf, reduc_smin_v4sf): New.
2005-06-18 James A. Morrison <phython@gcc.gnu.org>
* fold_const (fold_binary): Fold X % (2**N) to X & (2**N - 1) for

1
gcc/config/i386/i386-protos.h
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@ -230,6 +230,7 @@ extern rtx ix86_tls_get_addr (void);
extern void ix86_expand_vector_init (bool, rtx, rtx);
extern void ix86_expand_vector_set (bool, rtx, rtx, int);
extern void ix86_expand_vector_extract (bool, rtx, rtx, int);
extern void ix86_expand_reduc_v4sf (rtx (*)(rtx, rtx, rtx), rtx, rtx);
/* In winnt.c */
extern int i386_pe_dllexport_name_p (const char *);

21
gcc/config/i386/i386.c
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@ -17366,6 +17366,27 @@ ix86_expand_vector_extract (bool mmx_ok, rtx target, rtx vec, int elt)
emit_move_insn (target, tmp);
}
}
/* Expand a vector reduction on V4SFmode for SSE1. FN is the binar
pattern to reduce; DEST is the destination; IN is the input vector. */
void
ix86_expand_reduc_v4sf (rtx (*fn) (rtx, rtx, rtx), rtx dest, rtx in)
{
rtx tmp1, tmp2, tmp3;
tmp1 = gen_reg_rtx (V4SFmode);
tmp2 = gen_reg_rtx (V4SFmode);
tmp3 = gen_reg_rtx (V4SFmode);
emit_insn (gen_sse_movhlps (tmp1, in, in));
emit_insn (fn (tmp2, tmp1, in));
emit_insn (gen_sse_shufps_1 (tmp3, tmp2, tmp2,
GEN_INT (1), GEN_INT (1),
GEN_INT (1+4), GEN_INT (1+4)));
emit_insn (fn (dest, tmp2, tmp3));
}
/* Implements target hook vector_mode_supported_p. */
static bool

34
gcc/config/i386/sse.md
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@ -653,6 +653,40 @@
[(set_attr "type" "sseadd")
(set_attr "mode" "V4SF")])
(define_expand "reduc_plus_v4sf"
[(match_operand:V4SF 0 "register_operand" "")
(match_operand:V4SF 1 "register_operand" "")]
"TARGET_SSE"
{
if (TARGET_SSE3)
{
rtx tmp = gen_reg_rtx (V4SFmode);
emit_insn (gen_sse3_haddv4sf3 (tmp, operands[1], operands[1]));
emit_insn (gen_sse3_haddv4sf3 (operands[0], tmp, tmp));
}
else
ix86_expand_reduc_v4sf (gen_addv4sf3, operands[0], operands[1]);
DONE;
})
(define_expand "reduc_smax_v4sf"
[(match_operand:V4SF 0 "register_operand" "")
(match_operand:V4SF 1 "register_operand" "")]
"TARGET_SSE"
{
ix86_expand_reduc_v4sf (gen_smaxv4sf3, operands[0], operands[1]);
DONE;
})
(define_expand "reduc_smin_v4sf"
[(match_operand:V4SF 0 "register_operand" "")
(match_operand:V4SF 1 "register_operand" "")]
"TARGET_SSE"
{
ix86_expand_reduc_v4sf (gen_sminv4sf3, operands[0], operands[1]);
DONE;
})
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;; Parallel single-precision floating point comparisons

4
gcc/expr.c
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@ -5151,9 +5151,9 @@ store_constructor (tree exp, rtx target, int cleared, HOST_WIDE_INT size)
cleared = 1;
}
/* Inform later passes that the old value is dead. */
if (!cleared && REG_P (target))
/* Inform later passes that the old value is dead. */
emit_insn (gen_rtx_CLOBBER (VOIDmode, target));
emit_move_insn (target, CONST0_RTX (GET_MODE (target)));
/* Store each element of the constructor into the corresponding
element of TARGET, determined by counting the elements. */