This test tests whether traditional DS and DQ instructions that require the
bottom 2 bits of the offset to be zero (DS) or the bottom 4 of the offset to be
zero (DQ) properly generate the prefixed form of the instruction instead of
loading the offset into a GPR and doing an indexed memory operation.
Can I check test this into the FSF trunk?
2019-11-14 Michael Meissner <meiss...@linux.ibm.com>
* gcc.target/powerpc/prefix-odd-memory.c: New test to make sure
prefixed instructions are generated if an offset would not be
legal for the non-prefixed DS/DQ instructions.
--- /tmp/Clb8P3_prefix-odd-memory.c 2019-11-13 17:40:31.750441916 -0500
+++ gcc/testsuite/gcc.target/powerpc/prefix-odd-memory.c 2019-11-13
17:40:31.568440277 -0500
@@ -0,0 +1,156 @@
+/* { dg-do compile } */
+/* { dg-require-effective-target powerpc_prefixed_addr_ok } */
+/* { dg-options "-O2 -mdejagnu-cpu=future" } */
+
+/* Tests whether we can generate a prefixed load/store operation for addresses
+ that don't meet DS/DQ alignment constraints. */
+
+unsigned long
+load_uc_odd (unsigned char *p)
+{
+ return p[1]; /* should generate LBZ. */
+}
+
+long
+load_sc_odd (signed char *p)
+{
+ return p[1]; /* should generate LBZ + EXTSB. */
+}
+
+unsigned long
+load_us_odd (unsigned char *p)
+{
+ return *(unsigned short *)(p + 1); /* should generate LHZ. */
+}
+
+long
+load_ss_odd (unsigned char *p)
+{
+ return *(short *)(p + 1); /* should generate LHA. */
+}
+
+unsigned long
+load_ui_odd (unsigned char *p)
+{
+ return *(unsigned int *)(p + 1); /* should generate LWZ. */
+}
+
+long
+load_si_odd (unsigned char *p)
+{
+ return *(int *)(p + 1); /* should generate PLWA. */
+}
+
+unsigned long
+load_ul_odd (unsigned char *p)
+{
+ return *(unsigned long *)(p + 1); /* should generate PLD. */
+}
+
+long
+load_sl_odd (unsigned char *p)
+{
+ return *(long *)(p + 1); /* should generate PLD. */
+}
+
+float
+load_float_odd (unsigned char *p)
+{
+ return *(float *)(p + 1); /* should generate LFS. */
+}
+
+double
+load_double_odd (unsigned char *p)
+{
+ return *(double *)(p + 1); /* should generate LFD. */
+}
+
+__ieee128
+load_ieee128_odd (unsigned char *p)
+{
+ return *(__ieee128 *)(p + 1); /* should generate PLXV. */
+}
+
+void
+store_uc_odd (unsigned char uc, unsigned char *p)
+{
+ p[1] = uc; /* should generate STB. */
+}
+
+void
+store_sc_odd (signed char sc, signed char *p)
+{
+ p[1] = sc; /* should generate STB. */
+}
+
+void
+store_us_odd (unsigned short us, unsigned char *p)
+{
+ *(unsigned short *)(p + 1) = us; /* should generate STH. */
+}
+
+void
+store_ss_odd (signed short ss, unsigned char *p)
+{
+ *(signed short *)(p + 1) = ss; /* should generate STH. */
+}
+
+void
+store_ui_odd (unsigned int ui, unsigned char *p)
+{
+ *(unsigned int *)(p + 1) = ui; /* should generate STW. */
+}
+
+void
+store_si_odd (signed int si, unsigned char *p)
+{
+ *(signed int *)(p + 1) = si; /* should generate STW. */
+}
+
+void
+store_ul_odd (unsigned long ul, unsigned char *p)
+{
+ *(unsigned long *)(p + 1) = ul; /* should generate PSTD. */
+}
+
+void
+store_sl_odd (signed long sl, unsigned char *p)
+{
+ *(signed long *)(p + 1) = sl; /* should generate PSTD. */
+}
+
+void
+store_float_odd (float f, unsigned char *p)
+{
+ *(float *)(p + 1) = f; /* should generate STF. */
+}
+
+void
+store_double_odd (double d, unsigned char *p)
+{
+ *(double *)(p + 1) = d; /* should generate STD. */
+}
+
+void
+store_ieee128_odd (__ieee128 ieee, unsigned char *p)
+{
+ *(__ieee128 *)(p + 1) = ieee; /* should generate PSTXV. */
+}
+
+/* { dg-final { scan-assembler-times {\mextsb\M} 1 } } */
+/* { dg-final { scan-assembler-times {\mlbz\M} 2 } } */
+/* { dg-final { scan-assembler-times {\mlfd\M} 1 } } */
+/* { dg-final { scan-assembler-times {\mlfs\M} 1 } } */
+/* { dg-final { scan-assembler-times {\mlha\M} 1 } } */
+/* { dg-final { scan-assembler-times {\mlhz\M} 1 } } */
+/* { dg-final { scan-assembler-times {\mlwz\M} 1 } } */
+/* { dg-final { scan-assembler-times {\mpld\M} 2 } } */
+/* { dg-final { scan-assembler-times {\mplwa\M} 1 } } */
+/* { dg-final { scan-assembler-times {\mplxv\M} 1 } } */
+/* { dg-final { scan-assembler-times {\mpstd\M} 2 } } */
+/* { dg-final { scan-assembler-times {\mpstxv\M} 1 } } */
+/* { dg-final { scan-assembler-times {\mstb\M} 2 } } */
+/* { dg-final { scan-assembler-times {\mstfd\M} 1 } } */
+/* { dg-final { scan-assembler-times {\mstfs\M} 1 } } */
+/* { dg-final { scan-assembler-times {\msth\M} 2 } } */
+/* { dg-final { scan-assembler-times {\mstw\M} 2 } } */
--
Michael Meissner, IBM
IBM, M/S 2506R, 550 King Street, Littleton, MA 01460-6245, USA
email: meiss...@linux.ibm.com, phone: +1 (978) 899-4797
