===================================================================
@@ -0,0 +1,40 @@
+/* { dg-do run } */
+/* { dg-options "-save-temps -O2 -fno-inline" } */
+
+#include <string.h>
+#include <stdlib.h>
+
+#define LEN (100)
+short a[LEN];
+void
+foo (void)
+{
+ memset (a, -1, 7);
+ return;
+}
+
+void
+check (signed char *arr, int idx, int len, int v)
+{
+ int i;
+ for (i = 0; i < idx; i++)
+ if (arr[i] != v)
+ abort ();
+
+ for (i = idx; i < len; i++)
+ if (arr[i] != 0)
+ abort ();
+}
+
+int
+main(void)
+{
+ foo ();
+ check ((signed char *)a, 7, sizeof (a), -1);
+
+ return 0;
+}
+
+/* { dg-final { scan-assembler-not "bl?\[ \t\]*memset" { target { ! arm_thumb1_ok } } } } */
+/* { dg-final { scan-assembler-not "strh" { target { arm_unaligned } } } } */
+/* { dg-final { scan-assembler-not "strb" { target { arm_unaligned } } } } */
===================================================================
@@ -0,0 +1,68 @@
+/* { dg-do run } */
+/* { dg-skip-if "Don't inline memset using neon instructions on cortex-a9" { *-*-* } { "-mcpu=cortex-a9" } { "" } } */
+/* { dg-skip-if "Don't inline memset using neon instructions on cortex-a9" { *-*-* } { "-mtune=cortex-a9" } { "" } } */
+/* { dg-options "-save-temps -O2 -fno-inline" } */
+/* { dg-add-options "arm_neon" } */
+
+#include <string.h>
+#include <stdlib.h>
+
+#define LEN (100)
+int a[LEN];
+int b[LEN];
+int c[LEN];
+void
+foo1 (void)
+{
+ memset (a, -1, 8);
+ return;
+}
+
+void
+foo2 (void)
+{
+ memset (b, 1, 12);
+ return;
+}
+
+void
+foo3 (void)
+{
+ memset (c, 1, 13);
+ return;
+}
+
+void
+check (signed char *arr, int idx, int len, int v)
+{
+ int i;
+ for (i = 0; i < idx; i++)
+ if (arr[i] != v)
+ abort ();
+
+ for (i = idx; i < len; i++)
+ if (arr[i] != 0)
+ abort ();
+}
+
+int
+main(void)
+{
+ int i;
+
+ foo1 ();
+ check ((signed char *)a, 8, sizeof (a), -1);
+
+ foo2 ();
+ check ((signed char *)b, 12, sizeof (b), 1);
+
+ foo3 ();
+ check ((signed char *)c, 13, sizeof (c), 1);
+
+ return 0;
+}
+
+/* { dg-final { scan-assembler-not "bl?\[ \t\]+memset" { target { ! arm_thumb1_ok } } } } */
+/* { dg-final { scan-assembler-times "vst1\.8" 1 { target { arm_little_endian && arm_neon } } } } */
+/* { dg-final { scan-assembler "vstr" { target { arm_little_endian && arm_neon } } } } */
+/* { dg-final { cleanup-saved-temps } } */
===================================================================
@@ -0,0 +1,78 @@
+/* { dg-do run } */
+/* { dg-skip-if "Don't inline memset using neon instructions on cortex-a9" { *-*-* } { "-mcpu=cortex-a9" } { "" } } */
+/* { dg-skip-if "Don't inline memset using neon instructions on cortex-a9" { *-*-* } { "-mtune=cortex-a9" } { "" } } */
+/* { dg-options "-save-temps -O2 -fno-inline" } */
+/* { dg-add-options "arm_neon" } */
+
+#include <string.h>
+#include <stdlib.h>
+
+#define LEN (100)
+int a[LEN];
+int b[LEN];
+int c[LEN];
+int d[LEN];
+void
+foo1 (void)
+{
+ memset (a, -1, 16);
+ return;
+}
+
+void
+foo2 (void)
+{
+ memset (b, 1, 25);
+ return;
+}
+
+void
+foo3 (void)
+{
+ memset (c, -1, 19);
+ return;
+}
+
+void
+foo4 (void)
+{
+ memset (d, 1, 23);
+ return;
+}
+
+void
+check (signed char *arr, int idx, int len, int v)
+{
+ int i;
+ for (i = 0; i < idx; i++)
+ if (arr[i] != v)
+ abort ();
+
+ for (i = idx; i < len; i++)
+ if (arr[i] != 0)
+ abort ();
+}
+
+int
+main(void)
+{
+ foo1 ();
+ check ((signed char *)a, 16, sizeof (a), -1);
+
+ foo2 ();
+ check ((signed char *)b, 25, sizeof (b), 1);
+
+ foo3 ();
+ check ((signed char *)c, 19, sizeof (c), -1);
+
+ foo4 ();
+ check ((signed char *)d, 23, sizeof (d), 1);
+
+ return 0;
+}
+
+/* { dg-final { scan-assembler-not "bl?\[ \t\]+memset" { target { arm_little_endian && arm_neon } } } } */
+/* { dg-final { scan-assembler "vst1" { target { arm_little_endian && arm_neon } } } } */
+/* { dg-final { scan-assembler-not "vstr" { target { arm_little_endian && arm_neon } } } } */
+/* { dg-final { cleanup-saved-temps } } */
+
===================================================================
@@ -0,0 +1,68 @@
+/* { dg-do run } */
+/* { dg-skip-if "Don't inline memset using neon instructions on cortex-a9" { *-*-* } { "-mcpu=cortex-a9" } { "" } } */
+/* { dg-skip-if "Don't inline memset using neon instructions on cortex-a9" { *-*-* } { "-mtune=cortex-a9" } { "" } } */
+/* { dg-options "-save-temps -O2 -fno-inline" } */
+/* { dg-add-options "arm_neon" } */
+
+#include <string.h>
+#include <stdlib.h>
+
+#define LEN (100)
+int a[LEN];
+int b[LEN];
+int c[LEN];
+void
+foo1 (void)
+{
+ memset (a, -1, 20);
+ return;
+}
+
+void
+foo2 (void)
+{
+ memset (b, 1, 24);
+ return;
+}
+
+void
+foo3 (void)
+{
+ memset (c, -1, 32);
+ return;
+}
+
+void
+check (signed char *arr, int idx, int len, int v)
+{
+ int i;
+ for (i = 0; i < idx; i++)
+ if (arr[i] != v)
+ abort ();
+
+ for (i = idx; i < len; i++)
+ if (arr[i] != 0)
+ abort ();
+}
+
+int
+main(void)
+{
+ foo1 ();
+ check ((signed char *)a, 20, sizeof (a), -1);
+
+ foo2 ();
+ check ((signed char *)b, 24, sizeof (b), 1);
+
+ foo3 ();
+ check ((signed char *)c, 32, sizeof (c), -1);
+
+ return 0;
+}
+
+/* { dg-final { scan-assembler-not "bl?\[ \t\]+memset" { target { arm_little_endian && arm_neon } } } } */
+/* { dg-final { scan-assembler-times "vst1" 3 { target { arm_little_endian && arm_neon } } } } */
+/* { dg-final { scan-assembler-times "vstr" 4 { target { arm_little_endian && arm_neon } } } } */
+/* { dg-final { cleanup-saved-temps } } */
+
+
===================================================================
@@ -0,0 +1,95 @@
+/* { dg-do compile } */
+/* { dg-options "-march=armv7-a -mfloat-abi=hard -mfpu=neon -O2" } */
+
+#define BUF 100
+long a[BUF];
+
+typedef unsigned int size_t;
+typedef unsigned int wchar_t;
+void *memset (void *s, int c, size_t n);
+struct printf_info
+{
+ int prec;
+ int width;
+ wchar_t spec;
+ unsigned int is_long_double:1;
+ unsigned int is_short:1;
+ unsigned int is_long:1;
+ unsigned int alt:1;
+ unsigned int space:1;
+ unsigned int left:1;
+ unsigned int showsign:1;
+ unsigned int group:1;
+ unsigned int extra:1;
+ unsigned int is_char:1;
+ unsigned int wide:1;
+ unsigned int i18n:1;
+ unsigned int __pad:4;
+ unsigned short int user;
+ wchar_t pad;
+};
+
+void bar (int *alt, int *space, int *left, int *showsign,
+ int *group,
+ int *is_long_double,
+ int *is_short,
+ int *is_long,
+ int *width,
+ int *prec,
+ int *use_outdigits,
+ unsigned int *pad,
+ wchar_t *spec);
+void __printf_fp (char *s, struct printf_info *pinfo);
+int foo(char *s)
+{
+ int alt = 0;
+ int space = 0;
+ int left = 0;
+ int showsign = 0;
+ int group = 0;
+ int is_long_double = 0;
+ int is_short = 0;
+ int is_long = 0;
+ int width = 0;
+ int prec = -1;
+ int use_outdigits = 0;
+ unsigned int pad = L' ';
+ wchar_t spec;
+
+ bar (&alt, &space, &left, &showsign, &group, &is_long_double,
+ &is_short, &is_long, &width, &prec, &use_outdigits, &pad, &spec);
+
+ a[1] = a[0] + a[2] + a[3] + a[4] + a[5] + a[6];
+ a[2] = a[1] + a[3] + a[5] + a[5] + a[6] + a[7];
+ a[3] = a[2] + a[5] + a[7] + a[6] + a[7] + a[8];
+ a[4] = a[3] + a[7] + a[11] + a[7] + a[8] + a[9];
+ a[5] = a[5] + a[11] + a[13] + a[8] + a[9] + a[10];
+ a[6] = a[7] + a[13] + a[17] + a[9] + a[10] + a[11];
+ a[7] = a[11] + a[17] + a[19] + a[10] + a[11] + a[12];
+ a[8] = a[17] + a[19] + a[23] + a[29] + a[31] + a[37];
+
+ {
+ struct printf_info info;
+ memset (&info, 0, sizeof (struct printf_info));
+ info.prec = prec;
+ info.width = width;
+ info.spec = spec;
+ info.is_long_double = is_long_double;
+ info.is_short = is_short;
+ info.is_long = is_long;
+ info.alt = alt;
+ info.space = space;
+ info.left = left;
+ info.showsign = showsign;
+ info.group = group;
+ info.pad = pad;
+ info.extra = 0;
+ info.i18n = use_outdigits;
+ info.wide = sizeof (wchar_t) != 1;
+
+ __printf_fp (s, &info);
+ }
+
+ return 0;
+}
+
===================================================================
@@ -0,0 +1,171 @@
+/* { dg-do run } */
+/* { dg-options "-O2" } */
+
+#include <string.h>
+#include <stdlib.h>
+
+#define LEN (100)
+short a[LEN];
+int b[LEN];
+
+void
+init (signed char *arr, int len)
+{
+ int i;
+ for (i = 0; i < len; i++)
+ arr[i] = 0;
+}
+
+void
+check (signed char *arr, int idx, int len, int v)
+{
+ int i;
+ for (i = 0; i < idx; i++)
+ if (arr[i] != v)
+ abort ();
+
+ for (i = idx; i < len; i++)
+ if (arr[i] != 0)
+ abort ();
+}
+
+#define TEST(a,l,v) \
+ init ((signed char*)(a), sizeof (a)); \
+ memset ((a), (v), (l)); \
+ check ((signed char *)(a), (l), sizeof (a), (v));
+int
+main(void)
+{
+ TEST (a, 1, -1);
+ TEST (a, 2, -1);
+ TEST (a, 3, -1);
+ TEST (a, 4, -1);
+ TEST (a, 5, -1);
+ TEST (a, 6, -1);
+ TEST (a, 7, -1);
+ TEST (a, 8, -1);
+ TEST (a, 9, 1);
+ TEST (a, 10, -1);
+ TEST (a, 11, 1);
+ TEST (a, 12, -1);
+ TEST (a, 13, 1);
+ TEST (a, 14, -1);
+ TEST (a, 15, 1);
+ TEST (a, 16, -1);
+ TEST (a, 17, 1);
+ TEST (a, 18, -1);
+ TEST (a, 19, 1);
+ TEST (a, 20, -1);
+ TEST (a, 21, 1);
+ TEST (a, 22, -1);
+ TEST (a, 23, 1);
+ TEST (a, 24, -1);
+ TEST (a, 25, 1);
+ TEST (a, 26, -1);
+ TEST (a, 27, 1);
+ TEST (a, 28, -1);
+ TEST (a, 29, 1);
+ TEST (a, 30, -1);
+ TEST (a, 31, 1);
+ TEST (a, 32, -1);
+ TEST (a, 33, 1);
+ TEST (a, 34, -1);
+ TEST (a, 35, 1);
+ TEST (a, 36, -1);
+ TEST (a, 37, 1);
+ TEST (a, 38, -1);
+ TEST (a, 39, 1);
+ TEST (a, 40, -1);
+ TEST (a, 41, 1);
+ TEST (a, 42, -1);
+ TEST (a, 43, 1);
+ TEST (a, 44, -1);
+ TEST (a, 45, 1);
+ TEST (a, 46, -1);
+ TEST (a, 47, 1);
+ TEST (a, 48, -1);
+ TEST (a, 49, 1);
+ TEST (a, 50, -1);
+ TEST (a, 51, 1);
+ TEST (a, 52, -1);
+ TEST (a, 53, 1);
+ TEST (a, 54, -1);
+ TEST (a, 55, 1);
+ TEST (a, 56, -1);
+ TEST (a, 57, 1);
+ TEST (a, 58, -1);
+ TEST (a, 59, 1);
+ TEST (a, 60, -1);
+ TEST (a, 61, 1);
+ TEST (a, 62, -1);
+ TEST (a, 63, 1);
+ TEST (a, 64, -1);
+
+ TEST (b, 1, -1);
+ TEST (b, 2, -1);
+ TEST (b, 3, -1);
+ TEST (b, 4, -1);
+ TEST (b, 5, -1);
+ TEST (b, 6, -1);
+ TEST (b, 7, -1);
+ TEST (b, 8, -1);
+ TEST (b, 9, 1);
+ TEST (b, 10, -1);
+ TEST (b, 11, 1);
+ TEST (b, 12, -1);
+ TEST (b, 13, 1);
+ TEST (b, 14, -1);
+ TEST (b, 15, 1);
+ TEST (b, 16, -1);
+ TEST (b, 17, 1);
+ TEST (b, 18, -1);
+ TEST (b, 19, 1);
+ TEST (b, 20, -1);
+ TEST (b, 21, 1);
+ TEST (b, 22, -1);
+ TEST (b, 23, 1);
+ TEST (b, 24, -1);
+ TEST (b, 25, 1);
+ TEST (b, 26, -1);
+ TEST (b, 27, 1);
+ TEST (b, 28, -1);
+ TEST (b, 29, 1);
+ TEST (b, 30, -1);
+ TEST (b, 31, 1);
+ TEST (b, 32, -1);
+ TEST (b, 33, 1);
+ TEST (b, 34, -1);
+ TEST (b, 35, 1);
+ TEST (b, 36, -1);
+ TEST (b, 37, 1);
+ TEST (b, 38, -1);
+ TEST (b, 39, 1);
+ TEST (b, 40, -1);
+ TEST (b, 41, 1);
+ TEST (b, 42, -1);
+ TEST (b, 43, 1);
+ TEST (b, 44, -1);
+ TEST (b, 45, 1);
+ TEST (b, 46, -1);
+ TEST (b, 47, 1);
+ TEST (b, 48, -1);
+ TEST (b, 49, 1);
+ TEST (b, 50, -1);
+ TEST (b, 51, 1);
+ TEST (b, 52, -1);
+ TEST (b, 53, 1);
+ TEST (b, 54, -1);
+ TEST (b, 55, 1);
+ TEST (b, 56, -1);
+ TEST (b, 57, 1);
+ TEST (b, 58, -1);
+ TEST (b, 59, 1);
+ TEST (b, 60, -1);
+ TEST (b, 61, 1);
+ TEST (b, 62, -1);
+ TEST (b, 63, 1);
+ TEST (b, 64, -1);
+
+ return 0;
+}
+
===================================================================
@@ -0,0 +1,44 @@
+/* { dg-do run } */
+/* { dg-skip-if "Don't inline memset using neon instructions on cortex-a9" { *-*-* } { "-mcpu=cortex-a9" } { "" } } */
+/* { dg-skip-if "Don't inline memset using neon instructions on cortex-a9" { *-*-* } { "-mtune=cortex-a9" } { "" } } */
+/* { dg-options "-save-temps -O2 -fno-inline" } */
+/* { dg-add-options "arm_neon" } */
+
+#include <string.h>
+#include <stdlib.h>
+
+#define LEN (100)
+short a[LEN];
+void
+foo (void)
+{
+ memset (a, -1, 14);
+ return;
+}
+
+void
+check (signed char *arr, int idx, int len, int v)
+{
+ int i;
+ for (i = 0; i < idx; i++)
+ if (arr[i] != v)
+ abort ();
+
+ for (i = idx; i < len; i++)
+ if (arr[i] != 0)
+ abort ();
+}
+
+int
+main(void)
+{
+ foo ();
+ check ((signed char *)a, 14, sizeof (a), -1);
+
+ return 0;
+}
+
+/* { dg-final { scan-assembler-not "bl?\[ \t\]*memset" { target { arm_thumb2_ok } } } } */
+/* { dg-final { scan-assembler "vst1" { target { arm_little_endian && arm_neon } } } } */
+/* { dg-final { scan-assembler-not "vstr" { target { arm_little_endian && arm_neon } } } } */
+/* { dg-final { cleanup-saved-temps } } */
===================================================================
@@ -0,0 +1,39 @@
+/* { dg-do run } */
+/* { dg-options "-save-temps -O2 -fno-inline" } */
+
+#include <string.h>
+#include <stdlib.h>
+
+#define LEN (100)
+short a[LEN];
+void
+foo (void)
+{
+ memset (a, -1, 14);
+ return;
+}
+
+void
+check (signed char *arr, int idx, int len, int v)
+{
+ int i;
+ for (i = 0; i < idx; i++)
+ if (arr[i] != v)
+ abort ();
+
+ for (i = idx; i < len; i++)
+ if (arr[i] != 0)
+ abort ();
+}
+
+int
+main(void)
+{
+ foo ();
+ check ((signed char *)a, 14, sizeof (a), -1);
+
+ return 0;
+}
+
+/* { dg-final { scan-assembler-not "bl?\[ \t\]*memset" { target { arm_thumb2_ok } } } } */
+/* { dg-final { cleanup-saved-temps } } */
===================================================================
@@ -0,0 +1,42 @@
+/* { dg-do run } */
+/* { dg-skip-if "Don't inline memset using neon instructions on cortex-a9" { *-*-* } { "-mcpu=cortex-a9" } { "" } } */
+/* { dg-skip-if "Don't inline memset using neon instructions on cortex-a9" { *-*-* } { "-mtune=cortex-a9" } { "" } } */
+/* { dg-options "-save-temps -Os -fno-inline" } */
+/* { dg-add-options "arm_neon" } */
+
+#include <string.h>
+#include <stdlib.h>
+
+#define LEN (100)
+short a[LEN];
+void
+foo (void)
+{
+ memset (a, -1, 14);
+ return;
+}
+
+void
+check (signed char *arr, int idx, int len, int v)
+{
+ int i;
+ for (i = 0; i < idx; i++)
+ if (arr[i] != v)
+ abort ();
+
+ for (i = idx; i < len; i++)
+ if (arr[i] != 0)
+ abort ();
+}
+
+int
+main(void)
+{
+ foo ();
+ check ((signed char *)a, 14, sizeof (a), -1);
+
+ return 0;
+}
+/* { dg-final { scan-assembler-not "bl?\[ \t\]*memset" { target { arm_little_endian && arm_neon } } } } */
+/* { dg-final { scan-assembler "vst1" { target { arm_little_endian && arm_neon } } } } */
+/* { dg-final { cleanup-saved-temps } } */
===================================================================
@@ -0,0 +1,38 @@
+/* { dg-do run } */
+/* { dg-options "-save-temps -Os -fno-inline" } */
+
+#include <string.h>
+#include <stdlib.h>
+
+#define LEN (100)
+short a[LEN];
+void
+foo (void)
+{
+ memset (a, -1, 14);
+ return;
+}
+
+void
+check (signed char *arr, int idx, int len, int v)
+{
+ int i;
+ for (i = 0; i < idx; i++)
+ if (arr[i] != v)
+ abort ();
+
+ for (i = idx; i < len; i++)
+ if (arr[i] != 0)
+ abort ();
+}
+
+int
+main(void)
+{
+ foo ();
+ check ((signed char *)a, 14, sizeof (a), -1);
+
+ return 0;
+}
+/* { dg-final { scan-assembler "bl?\[ \t\]*memset" { target { ! arm_neon } } } } */
+/* { dg-final { cleanup-saved-temps } } */
===================================================================
@@ -6716,6 +6716,20 @@
})
+(define_expand "setmemsi"
+ [(match_operand:BLK 0 "general_operand" "")
+ (match_operand:SI 1 "const_int_operand" "")
+ (match_operand:SI 2 "const_int_operand" "")
+ (match_operand:SI 3 "const_int_operand" "")]
+ "TARGET_32BIT"
+{
+ if (arm_gen_setmem (operands))
+ DONE;
+
+ FAIL;
+})
+
+
;; Move a block of memory if it is word aligned and MORE than 2 words long.
;; We could let this apply for blocks of less than this, but it clobbers so
;; many registers that there is then probably a better way.
===================================================================
@@ -278,6 +278,10 @@ struct tune_params
/* Prefer 32-bit encoding instead of 16-bit encoding where subset of flags
would be set. */
bool disparage_partial_flag_setting_t16_encodings;
+ /* Prefer to inline string operations like memset by using Neon. */
+ bool string_ops_prefer_neon;
+ /* Maximum number of instructions to inline calls to memset. */
+ int max_insns_inline_memset;
};
extern const struct tune_params *current_tune;
@@ -290,6 +294,7 @@ extern void arm_emit_coreregs_64bit_shift (enum rt
extern bool arm_validize_comparison (rtx *, rtx *, rtx *);
#endif /* RTX_CODE */
+extern bool arm_gen_setmem (rtx *);
extern void arm_expand_vec_perm (rtx target, rtx op0, rtx op1, rtx sel);
extern bool arm_expand_vec_perm_const (rtx target, rtx op0, rtx op1, rtx sel);
===================================================================
@@ -1698,7 +1698,9 @@ const struct tune_params arm_slowmul_tune =
{true, true}, /* Prefer non short circuit. */
&arm_default_vec_cost, /* Vectorizer costs. */
false, /* Prefer Neon for 64-bits bitops. */
- false, false /* Prefer 32-bit encodings. */
+ false, false, /* Prefer 32-bit encodings. */
+ false, /* Prefer Neon for stringops. */
+ 8 /* Maximum insns to inline memset. */
};
const struct tune_params arm_fastmul_tune =
@@ -1715,7 +1717,9 @@ const struct tune_params arm_fastmul_tune =
{true, true}, /* Prefer non short circuit. */
&arm_default_vec_cost, /* Vectorizer costs. */
false, /* Prefer Neon for 64-bits bitops. */
- false, false /* Prefer 32-bit encodings. */
+ false, false, /* Prefer 32-bit encodings. */
+ false, /* Prefer Neon for stringops. */
+ 8 /* Maximum insns to inline memset. */
};
/* StrongARM has early execution of branches, so a sequence that is worth
@@ -1735,7 +1739,9 @@ const struct tune_params arm_strongarm_tune =
{true, true}, /* Prefer non short circuit. */
&arm_default_vec_cost, /* Vectorizer costs. */
false, /* Prefer Neon for 64-bits bitops. */
- false, false /* Prefer 32-bit encodings. */
+ false, false, /* Prefer 32-bit encodings. */
+ false, /* Prefer Neon for stringops. */
+ 8 /* Maximum insns to inline memset. */
};
const struct tune_params arm_xscale_tune =
@@ -1752,7 +1758,9 @@ const struct tune_params arm_xscale_tune =
{true, true}, /* Prefer non short circuit. */
&arm_default_vec_cost, /* Vectorizer costs. */
false, /* Prefer Neon for 64-bits bitops. */
- false, false /* Prefer 32-bit encodings. */
+ false, false, /* Prefer 32-bit encodings. */
+ false, /* Prefer Neon for stringops. */
+ 8 /* Maximum insns to inline memset. */
};
const struct tune_params arm_9e_tune =
@@ -1769,7 +1777,9 @@ const struct tune_params arm_9e_tune =
{true, true}, /* Prefer non short circuit. */
&arm_default_vec_cost, /* Vectorizer costs. */
false, /* Prefer Neon for 64-bits bitops. */
- false, false /* Prefer 32-bit encodings. */
+ false, false, /* Prefer 32-bit encodings. */
+ false, /* Prefer Neon for stringops. */
+ 8 /* Maximum insns to inline memset. */
};
const struct tune_params arm_v6t2_tune =
@@ -1786,7 +1796,9 @@ const struct tune_params arm_v6t2_tune =
{true, true}, /* Prefer non short circuit. */
&arm_default_vec_cost, /* Vectorizer costs. */
false, /* Prefer Neon for 64-bits bitops. */
- false, false /* Prefer 32-bit encodings. */
+ false, false, /* Prefer 32-bit encodings. */
+ false, /* Prefer Neon for stringops. */
+ 8 /* Maximum insns to inline memset. */
};
/* Generic Cortex tuning. Use more specific tunings if appropriate. */
@@ -1804,7 +1816,9 @@ const struct tune_params arm_cortex_tune =
{true, true}, /* Prefer non short circuit. */
&arm_default_vec_cost, /* Vectorizer costs. */
false, /* Prefer Neon for 64-bits bitops. */
- false, false /* Prefer 32-bit encodings. */
+ false, false, /* Prefer 32-bit encodings. */
+ false, /* Prefer Neon for stringops. */
+ 8 /* Maximum insns to inline memset. */
};
const struct tune_params arm_cortex_a8_tune =
@@ -1821,7 +1835,9 @@ const struct tune_params arm_cortex_a8_tune =
{true, true}, /* Prefer non short circuit. */
&arm_default_vec_cost, /* Vectorizer costs. */
false, /* Prefer Neon for 64-bits bitops. */
- false, false /* Prefer 32-bit encodings. */
+ false, false, /* Prefer 32-bit encodings. */
+ true, /* Prefer Neon for stringops. */
+ 8 /* Maximum insns to inline memset. */
};
const struct tune_params arm_cortex_a7_tune =
@@ -1838,7 +1854,9 @@ const struct tune_params arm_cortex_a7_tune =
{true, true}, /* Prefer non short circuit. */
&arm_default_vec_cost, /* Vectorizer costs. */
false, /* Prefer Neon for 64-bits bitops. */
- false, false /* Prefer 32-bit encodings. */
+ false, false, /* Prefer 32-bit encodings. */
+ true, /* Prefer Neon for stringops. */
+ 8 /* Maximum insns to inline memset. */
};
const struct tune_params arm_cortex_a15_tune =
@@ -1855,7 +1873,9 @@ const struct tune_params arm_cortex_a15_tune =
{true, true}, /* Prefer non short circuit. */
&arm_default_vec_cost, /* Vectorizer costs. */
false, /* Prefer Neon for 64-bits bitops. */
- true, true /* Prefer 32-bit encodings. */
+ true, true, /* Prefer 32-bit encodings. */
+ true, /* Prefer Neon for stringops. */
+ 8 /* Maximum insns to inline memset. */
};
const struct tune_params arm_cortex_a53_tune =
@@ -1872,7 +1892,9 @@ const struct tune_params arm_cortex_a53_tune =
{true, true}, /* Prefer non short circuit. */
&arm_default_vec_cost, /* Vectorizer costs. */
false, /* Prefer Neon for 64-bits bitops. */
- false, false /* Prefer 32-bit encodings. */
+ false, false, /* Prefer 32-bit encodings. */
+ false, /* Prefer Neon for stringops. */
+ 8 /* Maximum insns to inline memset. */
};
const struct tune_params arm_cortex_a57_tune =
@@ -1889,7 +1911,9 @@ const struct tune_params arm_cortex_a57_tune =
{true, true}, /* Prefer non short circuit. */
&arm_default_vec_cost, /* Vectorizer costs. */
false, /* Prefer Neon for 64-bits bitops. */
- true, true /* Prefer 32-bit encodings. */
+ true, true, /* Prefer 32-bit encodings. */
+ false, /* Prefer Neon for stringops. */
+ 8 /* Maximum insns to inline memset. */
};
/* Branches can be dual-issued on Cortex-A5, so conditional execution is
@@ -1909,7 +1933,9 @@ const struct tune_params arm_cortex_a5_tune =
{false, false}, /* Prefer non short circuit. */
&arm_default_vec_cost, /* Vectorizer costs. */
false, /* Prefer Neon for 64-bits bitops. */
- false, false /* Prefer 32-bit encodings. */
+ false, false, /* Prefer 32-bit encodings. */
+ true, /* Prefer Neon for stringops. */
+ 8 /* Maximum insns to inline memset. */
};
const struct tune_params arm_cortex_a9_tune =
@@ -1926,7 +1952,9 @@ const struct tune_params arm_cortex_a9_tune =
{true, true}, /* Prefer non short circuit. */
&arm_default_vec_cost, /* Vectorizer costs. */
false, /* Prefer Neon for 64-bits bitops. */
- false, false /* Prefer 32-bit encodings. */
+ false, false, /* Prefer 32-bit encodings. */
+ false, /* Prefer Neon for stringops. */
+ 8 /* Maximum insns to inline memset. */
};
const struct tune_params arm_cortex_a12_tune =
@@ -1943,7 +1971,9 @@ const struct tune_params arm_cortex_a12_tune =
{true, true}, /* Prefer non short circuit. */
&arm_default_vec_cost, /* Vectorizer costs. */
false, /* Prefer Neon for 64-bits bitops. */
- false, false /* Prefer 32-bit encodings. */
+ false, false, /* Prefer 32-bit encodings. */
+ true, /* Prefer Neon for stringops. */
+ 8 /* Maximum insns to inline memset. */
};
/* armv7m tuning. On Cortex-M4 cores for example, MOVW/MOVT take a single
@@ -1967,7 +1997,9 @@ const struct tune_params arm_v7m_tune =
{false, false}, /* Prefer non short circuit. */
&arm_default_vec_cost, /* Vectorizer costs. */
false, /* Prefer Neon for 64-bits bitops. */
- false, false /* Prefer 32-bit encodings. */
+ false, false, /* Prefer 32-bit encodings. */
+ false, /* Prefer Neon for stringops. */
+ 8 /* Maximum insns to inline memset. */
};
/* The arm_v6m_tune is duplicated from arm_cortex_tune, rather than
@@ -1986,7 +2018,9 @@ const struct tune_params arm_v6m_tune =
{false, false}, /* Prefer non short circuit. */
&arm_default_vec_cost, /* Vectorizer costs. */
false, /* Prefer Neon for 64-bits bitops. */
- false, false /* Prefer 32-bit encodings. */
+ false, false, /* Prefer 32-bit encodings. */
+ false, /* Prefer Neon for stringops. */
+ 8 /* Maximum insns to inline memset. */
};
const struct tune_params arm_fa726te_tune =
@@ -2003,7 +2037,9 @@ const struct tune_params arm_fa726te_tune =
{true, true}, /* Prefer non short circuit. */
&arm_default_vec_cost, /* Vectorizer costs. */
false, /* Prefer Neon for 64-bits bitops. */
- false, false /* Prefer 32-bit encodings. */
+ false, false, /* Prefer 32-bit encodings. */
+ false, /* Prefer Neon for stringops. */
+ 8 /* Maximum insns to inline memset. */
};
@@ -16903,6 +16939,14 @@ arm_const_double_inline_cost (rtx val)
NULL_RTX, NULL_RTX, 0, 0));
}
+/* Cost of loading a SImode constant. */
+static inline int
+arm_const_inline_cost (enum rtx_code code, rtx val)
+{
+ return arm_gen_constant (code, SImode, NULL_RTX, INTVAL (val),
+ NULL_RTX, NULL_RTX, 1, 0);
+}
+
/* Return true if it is worthwhile to split a 64-bit constant into two
32-bit operations. This is the case if optimizing for size, or
if we have load delay slots, or if one 32-bit part can be done with
@@ -31546,6 +31597,519 @@ arm_validize_comparison (rtx *comparison, rtx * op
}
+/* Maximum number of instructions to set block of memory. */
+static int
+arm_block_set_max_insns (void)
+{
+ if (optimize_function_for_size_p (cfun))
+ return 4;
+ else
+ return current_tune->max_insns_inline_memset;
+}
+
+/* Return TRUE if it's profitable to set block of memory for
+ non-vectorized case. VAL is the value to set the memory
+ with. LENGTH is the number of bytes to set. ALIGN is the
+ alignment of the destination memory in bytes. UNALIGNED_P
+ is TRUE if we can only set the memory with instructions
+ meeting alignment requirements. USE_STRD_P is TRUE if we
+ can use strd to set the memory. */
+static bool
+arm_block_set_non_vect_profit_p (rtx val,
+ unsigned HOST_WIDE_INT length,
+ unsigned HOST_WIDE_INT align,
+ bool unaligned_p, bool use_strd_p)
+{
+ int num = 0;
+ /* For leftovers in bytes of 0-7, we can set the memory block using
+ strb/strh/str with minimum instruction number. */
+ const int leftover[8] = {0, 1, 1, 2, 1, 2, 2, 3};
+
+ if (unaligned_p)
+ {
+ num = arm_const_inline_cost (SET, val);
+ num += length / align + length % align;
+ }
+ else if (use_strd_p)
+ {
+ num = arm_const_double_inline_cost (val);
+ num += (length >> 3) + leftover[length & 7];
+ }
+ else
+ {
+ num = arm_const_inline_cost (SET, val);
+ num += (length >> 2) + leftover[length & 3];
+ }
+
+ /* We may be able to combine last pair STRH/STRB into a single STR
+ by shifting one byte back. */
+ if (unaligned_access && length > 3 && (length & 3) == 3)
+ num--;
+
+ return (num <= arm_block_set_max_insns ());
+}
+
+/* Return TRUE if it's profitable to set block of memory for
+ vectorized case. LENGTH is the number of bytes to set.
+ ALIGN is the alignment of destination memory in bytes.
+ MODE is the vector mode used to set the memory. */
+static bool
+arm_block_set_vect_profit_p (unsigned HOST_WIDE_INT length,
+ unsigned HOST_WIDE_INT align,
+ enum machine_mode mode)
+{
+ int num;
+ bool unaligned_p = ((align & 3) != 0);
+ unsigned int nelt = GET_MODE_NUNITS (mode);
+
+ /* Instruction loading constant value. */
+ num = 1;
+ /* Instructions storing the memory. */
+ num += (length + nelt - 1) / nelt;
+ /* Instructions adjusting the address expression. Only need to
+ adjust address expression if it's 4 bytes aligned and bytes
+ leftover can only be stored by mis-aligned store instruction. */
+ if (!unaligned_p && (length & 3) != 0)
+ num++;
+
+ /* Store the first 16 bytes using vst1:v16qi for the aligned case. */
+ if (!unaligned_p && mode == V16QImode)
+ num--;
+
+ return (num <= arm_block_set_max_insns ());
+}
+
+/* Set a block of memory using vectorization instructions for the
+ unaligned case. We fill the first LENGTH bytes of the memory
+ area starting from DSTBASE with byte constant VALUE. ALIGN is
+ the alignment requirement of memory. Return TRUE if succeeded. */
+static bool
+arm_block_set_unaligned_vect (rtx dstbase,
+ unsigned HOST_WIDE_INT length,
+ unsigned HOST_WIDE_INT value,
+ unsigned HOST_WIDE_INT align)
+{
+ unsigned int i, j, nelt_v16, nelt_v8, nelt_mode;
+ rtx dst, mem;
+ rtx val_elt, val_vec, reg;
+ rtx rval[MAX_VECT_LEN];
+ rtx (*gen_func) (rtx, rtx);
+ enum machine_mode mode;
+ unsigned HOST_WIDE_INT v = value;
+
+ gcc_assert ((align & 0x3) != 0);
+ nelt_v8 = GET_MODE_NUNITS (V8QImode);
+ nelt_v16 = GET_MODE_NUNITS (V16QImode);
+ if (length >= nelt_v16)
+ {
+ mode = V16QImode;
+ gen_func = gen_movmisalignv16qi;
+ }
+ else
+ {
+ mode = V8QImode;
+ gen_func = gen_movmisalignv8qi;
+ }
+ nelt_mode = GET_MODE_NUNITS (mode);
+ gcc_assert (length >= nelt_mode);
+ /* Skip if it isn't profitable. */
+ if (!arm_block_set_vect_profit_p (length, align, mode))
+ return false;
+
+ dst = copy_addr_to_reg (XEXP (dstbase, 0));
+ mem = adjust_automodify_address (dstbase, mode, dst, 0);
+
+ v = sext_hwi (v, BITS_PER_WORD);
+ val_elt = GEN_INT (v);
+ for (j = 0; j < nelt_mode; j++)
+ rval[j] = val_elt;
+
+ reg = gen_reg_rtx (mode);
+ val_vec = gen_rtx_CONST_VECTOR (mode, gen_rtvec_v (nelt_mode, rval));
+ /* Emit instruction loading the constant value. */
+ emit_move_insn (reg, val_vec);
+
+ /* Handle nelt_mode bytes in a vector. */
+ for (i = 0; (i + nelt_mode <= length); i += nelt_mode)
+ {
+ emit_insn ((*gen_func) (mem, reg));
+ if (i + 2 * nelt_mode <= length)
+ emit_insn (gen_add2_insn (dst, GEN_INT (nelt_mode)));
+ }
+
+ /* If there are not less than nelt_v8 bytes leftover, we must be in
+ V16QI mode. */
+ gcc_assert ((i + nelt_v8) > length || mode == V16QImode);
+
+ /* Handle (8, 16) bytes leftover. */
+ if (i + nelt_v8 < length)
+ {
+ emit_insn (gen_add2_insn (dst, GEN_INT (length - i)));
+ /* We are shifting bytes back, set the alignment accordingly. */
+ if ((length & 1) != 0 && align >= 2)
+ set_mem_align (mem, BITS_PER_UNIT);
+
+ emit_insn (gen_movmisalignv16qi (mem, reg));
+ }
+ /* Handle (0, 8] bytes leftover. */
+ else if (i < length && i + nelt_v8 >= length)
+ {
+ if (mode == V16QImode)
+ {
+ reg = gen_lowpart (V8QImode, reg);
+ mem = adjust_automodify_address (dstbase, V8QImode, dst, 0);
+ }
+ emit_insn (gen_add2_insn (dst, GEN_INT ((length - i)
+ + (nelt_mode - nelt_v8))));
+ /* We are shifting bytes back, set the alignment accordingly. */
+ if ((length & 1) != 0 && align >= 2)
+ set_mem_align (mem, BITS_PER_UNIT);
+
+ emit_insn (gen_movmisalignv8qi (mem, reg));
+ }
+
+ return true;
+}
+
+/* Set a block of memory using vectorization instructions for the
+ aligned case. We fill the first LENGTH bytes of the memory area
+ starting from DSTBASE with byte constant VALUE. ALIGN is the
+ alignment requirement of memory. Return TRUE if succeeded. */
+static bool
+arm_block_set_aligned_vect (rtx dstbase,
+ unsigned HOST_WIDE_INT length,
+ unsigned HOST_WIDE_INT value,
+ unsigned HOST_WIDE_INT align)
+{
+ unsigned int i, j, nelt_v8, nelt_v16, nelt_mode;
+ rtx dst, addr, mem;
+ rtx val_elt, val_vec, reg;
+ rtx rval[MAX_VECT_LEN];
+ enum machine_mode mode;
+ unsigned HOST_WIDE_INT v = value;
+
+ gcc_assert ((align & 0x3) == 0);
+ nelt_v8 = GET_MODE_NUNITS (V8QImode);
+ nelt_v16 = GET_MODE_NUNITS (V16QImode);
+ if (length >= nelt_v16 && unaligned_access && !BYTES_BIG_ENDIAN)
+ mode = V16QImode;
+ else
+ mode = V8QImode;
+
+ nelt_mode = GET_MODE_NUNITS (mode);
+ gcc_assert (length >= nelt_mode);
+ /* Skip if it isn't profitable. */
+ if (!arm_block_set_vect_profit_p (length, align, mode))
+ return false;
+
+ dst = copy_addr_to_reg (XEXP (dstbase, 0));
+
+ v = sext_hwi (v, BITS_PER_WORD);
+ val_elt = GEN_INT (v);
+ for (j = 0; j < nelt_mode; j++)
+ rval[j] = val_elt;
+
+ reg = gen_reg_rtx (mode);
+ val_vec = gen_rtx_CONST_VECTOR (mode, gen_rtvec_v (nelt_mode, rval));
+ /* Emit instruction loading the constant value. */
+ emit_move_insn (reg, val_vec);
+
+ i = 0;
+ /* Handle first 16 bytes specially using vst1:v16qi instruction. */
+ if (mode == V16QImode)
+ {
+ mem = adjust_automodify_address (dstbase, mode, dst, 0);
+ emit_insn (gen_movmisalignv16qi (mem, reg));
+ i += nelt_mode;
+ /* Handle (8, 16) bytes leftover using vst1:v16qi again. */
+ if (i + nelt_v8 < length && i + nelt_v16 > length)
+ {
+ emit_insn (gen_add2_insn (dst, GEN_INT (length - nelt_mode)));
+ mem = adjust_automodify_address (dstbase, mode, dst, 0);
+ /* We are shifting bytes back, set the alignment accordingly. */
+ if ((length & 0x3) == 0)
+ set_mem_align (mem, BITS_PER_UNIT * 4);
+ else if ((length & 0x1) == 0)
+ set_mem_align (mem, BITS_PER_UNIT * 2);
+ else
+ set_mem_align (mem, BITS_PER_UNIT);
+
+ emit_insn (gen_movmisalignv16qi (mem, reg));
+ return true;
+ }
+ /* Fall through for bytes leftover. */
+ mode = V8QImode;
+ nelt_mode = GET_MODE_NUNITS (mode);
+ reg = gen_lowpart (V8QImode, reg);
+ }
+
+ /* Handle 8 bytes in a vector. */
+ for (; (i + nelt_mode <= length); i += nelt_mode)
+ {
+ addr = plus_constant (Pmode, dst, i);
+ mem = adjust_automodify_address (dstbase, mode, addr, i);
+ emit_move_insn (mem, reg);
+ }
+
+ /* Handle single word leftover by shifting 4 bytes back. We can
+ use aligned access for this case. */
+ if (i + UNITS_PER_WORD == length)
+ {
+ addr = plus_constant (Pmode, dst, i - UNITS_PER_WORD);
+ mem = adjust_automodify_address (dstbase, mode,
+ addr, i - UNITS_PER_WORD);
+ /* We are shifting 4 bytes back, set the alignment accordingly. */
+ if (align > UNITS_PER_WORD)
+ set_mem_align (mem, BITS_PER_UNIT * UNITS_PER_WORD);
+
+ emit_move_insn (mem, reg);
+ }
+ /* Handle (0, 4), (4, 8) bytes leftover by shifting bytes back.
+ We have to use unaligned access for this case. */
+ else if (i < length)
+ {
+ emit_insn (gen_add2_insn (dst, GEN_INT (length - nelt_mode)));
+ mem = adjust_automodify_address (dstbase, mode, dst, 0);
+ /* We are shifting bytes back, set the alignment accordingly. */
+ if ((length & 1) == 0)
+ set_mem_align (mem, BITS_PER_UNIT * 2);
+ else
+ set_mem_align (mem, BITS_PER_UNIT);
+
+ emit_insn (gen_movmisalignv8qi (mem, reg));
+ }
+
+ return true;
+}
+
+/* Set a block of memory using plain strh/strb instructions, only
+ using instructions allowed by ALIGN on processor. We fill the
+ first LENGTH bytes of the memory area starting from DSTBASE
+ with byte constant VALUE. ALIGN is the alignment requirement
+ of memory. */
+static bool
+arm_block_set_unaligned_non_vect (rtx dstbase,
+ unsigned HOST_WIDE_INT length,
+ unsigned HOST_WIDE_INT value,
+ unsigned HOST_WIDE_INT align)
+{
+ unsigned int i;
+ rtx dst, addr, mem;
+ rtx val_exp, val_reg, reg;
+ enum machine_mode mode;
+ HOST_WIDE_INT v = value;
+
+ gcc_assert (align == 1 || align == 2);
+
+ if (align == 2)
+ v |= (value << BITS_PER_UNIT);
+
+ v = sext_hwi (v, BITS_PER_WORD);
+ val_exp = GEN_INT (v);
+ /* Skip if it isn't profitable. */
+ if (!arm_block_set_non_vect_profit_p (val_exp, length,
+ align, true, false))
+ return false;
+
+ dst = copy_addr_to_reg (XEXP (dstbase, 0));
+ mode = (align == 2 ? HImode : QImode);
+ val_reg = force_reg (SImode, val_exp);
+ reg = gen_lowpart (mode, val_reg);
+
+ for (i = 0; (i + GET_MODE_SIZE (mode) <= length); i += GET_MODE_SIZE (mode))
+ {
+ addr = plus_constant (Pmode, dst, i);
+ mem = adjust_automodify_address (dstbase, mode, addr, i);
+ emit_move_insn (mem, reg);
+ }
+
+ /* Handle single byte leftover. */
+ if (i + 1 == length)
+ {
+ reg = gen_lowpart (QImode, val_reg);
+ addr = plus_constant (Pmode, dst, i);
+ mem = adjust_automodify_address (dstbase, QImode, addr, i);
+ emit_move_insn (mem, reg);
+ i++;
+ }
+
+ gcc_assert (i == length);
+ return true;
+}
+
+/* Set a block of memory using plain strd/str/strh/strb instructions,
+ to permit unaligned copies on processors which support unaligned
+ semantics for those instructions. We fill the first LENGTH bytes
+ of the memory area starting from DSTBASE with byte constant VALUE.
+ ALIGN is the alignment requirement of memory. */
+static bool
+arm_block_set_aligned_non_vect (rtx dstbase,
+ unsigned HOST_WIDE_INT length,
+ unsigned HOST_WIDE_INT value,
+ unsigned HOST_WIDE_INT align)
+{
+ unsigned int i;
+ rtx dst, addr, mem;
+ rtx val_exp, val_reg, reg;
+ unsigned HOST_WIDE_INT v;
+ bool use_strd_p;
+
+ use_strd_p = (length >= 2 * UNITS_PER_WORD && (align & 3) == 0
+ && TARGET_LDRD && current_tune->prefer_ldrd_strd);
+
+ v = (value | (value << 8) | (value << 16) | (value << 24));
+ if (length < UNITS_PER_WORD)
+ v &= (0xFFFFFFFF >> (UNITS_PER_WORD - length) * BITS_PER_UNIT);
+
+ if (use_strd_p)
+ v |= (v << BITS_PER_WORD);
+ else
+ v = sext_hwi (v, BITS_PER_WORD);
+
+ val_exp = GEN_INT (v);
+ /* Skip if it isn't profitable. */
+ if (!arm_block_set_non_vect_profit_p (val_exp, length,
+ align, false, use_strd_p))
+ {
+ if (!use_strd_p)
+ return false;
+
+ /* Try without strd. */
+ v = (v >> BITS_PER_WORD);
+ v = sext_hwi (v, BITS_PER_WORD);
+ val_exp = GEN_INT (v);
+ use_strd_p = false;
+ if (!arm_block_set_non_vect_profit_p (val_exp, length,
+ align, false, use_strd_p))
+ return false;
+ }
+
+ i = 0;
+ dst = copy_addr_to_reg (XEXP (dstbase, 0));
+ /* Handle double words using strd if possible. */
+ if (use_strd_p)
+ {
+ val_reg = force_reg (DImode, val_exp);
+ reg = val_reg;
+ for (; (i + 8 <= length); i += 8)
+ {
+ addr = plus_constant (Pmode, dst, i);
+ mem = adjust_automodify_address (dstbase, DImode, addr, i);
+ emit_move_insn (mem, reg);
+ }
+ }
+ else
+ val_reg = force_reg (SImode, val_exp);
+
+ /* Handle words. */
+ reg = (use_strd_p ? gen_lowpart (SImode, val_reg) : val_reg);
+ for (; (i + 4 <= length); i += 4)
+ {
+ addr = plus_constant (Pmode, dst, i);
+ mem = adjust_automodify_address (dstbase, SImode, addr, i);
+ if ((align & 3) == 0)
+ emit_move_insn (mem, reg);
+ else
+ emit_insn (gen_unaligned_storesi (mem, reg));
+ }
+
+ /* Merge last pair of STRH and STRB into a STR if possible. */
+ if (unaligned_access && i > 0 && (i + 3) == length)
+ {
+ addr = plus_constant (Pmode, dst, i - 1);
+ mem = adjust_automodify_address (dstbase, SImode, addr, i - 1);
+ /* We are shifting one byte back, set the alignment accordingly. */
+ if ((align & 1) == 0)
+ set_mem_align (mem, BITS_PER_UNIT);
+
+ /* Most likely this is an unaligned access, and we can't tell at
+ compilation time. */
+ emit_insn (gen_unaligned_storesi (mem, reg));
+ return true;
+ }
+
+ /* Handle half word leftover. */
+ if (i + 2 <= length)
+ {
+ reg = gen_lowpart (HImode, val_reg);
+ addr = plus_constant (Pmode, dst, i);
+ mem = adjust_automodify_address (dstbase, HImode, addr, i);
+ if ((align & 1) == 0)
+ emit_move_insn (mem, reg);
+ else
+ emit_insn (gen_unaligned_storehi (mem, reg));
+
+ i += 2;
+ }
+
+ /* Handle single byte leftover. */
+ if (i + 1 == length)
+ {
+ reg = gen_lowpart (QImode, val_reg);
+ addr = plus_constant (Pmode, dst, i);
+ mem = adjust_automodify_address (dstbase, QImode, addr, i);
+ emit_move_insn (mem, reg);
+ }
+
+ return true;
+}
+
+/* Set a block of memory using vectorization instructions for both
+ aligned and unaligned cases. We fill the first LENGTH bytes of
+ the memory area starting from DSTBASE with byte constant VALUE.
+ ALIGN is the alignment requirement of memory. */
+static bool
+arm_block_set_vect (rtx dstbase,
+ unsigned HOST_WIDE_INT length,
+ unsigned HOST_WIDE_INT value,
+ unsigned HOST_WIDE_INT align)
+{
+ /* Check whether we need to use unaligned store instruction. */
+ if (((align & 3) != 0 || (length & 3) != 0)
+ /* Check whether unaligned store instruction is available. */
+ && (!unaligned_access || BYTES_BIG_ENDIAN))
+ return false;
+
+ if ((align & 3) == 0)
+ return arm_block_set_aligned_vect (dstbase, length, value, align);
+ else
+ return arm_block_set_unaligned_vect (dstbase, length, value, align);
+}
+
+/* Expand string store operation. Firstly we try to do that by using
+ vectorization instructions, then try with ARM unaligned access and
+ double-word store if profitable. OPERANDS[0] is the destination,
+ OPERANDS[1] is the number of bytes, operands[2] is the value to
+ initialize the memory, OPERANDS[3] is the known alignment of the
+ destination. */
+bool
+arm_gen_setmem (rtx *operands)
+{
+ rtx dstbase = operands[0];
+ unsigned HOST_WIDE_INT length;
+ unsigned HOST_WIDE_INT value;
+ unsigned HOST_WIDE_INT align;
+
+ if (!CONST_INT_P (operands[2]) || !CONST_INT_P (operands[1]))
+ return false;
+
+ length = UINTVAL (operands[1]);
+ if (length > 64)
+ return false;
+
+ value = (UINTVAL (operands[2]) & 0xFF);
+ align = UINTVAL (operands[3]);
+ if (TARGET_NEON && length >= 8
+ && current_tune->string_ops_prefer_neon
+ && arm_block_set_vect (dstbase, length, value, align))
+ return true;
+
+ if (!unaligned_access && (align & 3) != 0)
+ return arm_block_set_unaligned_non_vect (dstbase, length, value, align);
+
+ return arm_block_set_aligned_non_vect (dstbase, length, value, align);
+}
+
/* Implement the TARGET_ASAN_SHADOW_OFFSET hook. */
static unsigned HOST_WIDE_INT