case ENB_MMA:
error ("%qs requires the %qs option", name, "-mmma");
break;
+ case ENB_FUTURE:
+ error ("%qs requires the %qs option", name, "-mcpu=future");
+ break;
+ case ENB_FUTURE_64:
+ error ("%qs requires the %qs option and either the %qs or %qs option",
+ name, "-mcpu=future", "-m64", "-mpowerpc64");
+ break;
+ case ENB_DM:
+ error ("%qs requires the %qs or %qs options", name, "-mcpu=future",
+ "-mdense-math");
+ break;
default:
case ENB_ALWAYS:
gcc_unreachable ();
return TARGET_HTM;
case ENB_MMA:
return TARGET_MMA;
+ case ENB_FUTURE:
+ return TARGET_FUTURE;
+ case ENB_FUTURE_64:
+ return TARGET_FUTURE && TARGET_POWERPC64;
+ case ENB_DM:
+ return TARGET_DENSE_MATH;
default:
gcc_unreachable ();
}
; endian Needs special handling for endianness
; ibmld Restrict usage to the case when TFmode is IBM-128
; ibm128 Restrict usage to the case where __ibm128 is supported or if ibmld
+; future Restrict usage to future instructions
+; dm Restrict usage to dense math
;
; Each attribute corresponds to extra processing required when
; the built-in is expanded. All such special processing should
void __builtin_vsx_stxvp (v256, unsigned long, const v256 *);
STXVP nothing {mma,pair}
+
+[future]
+ const signed int __builtin_saturate_subtract32 (signed int, signed int);
+ SAT_SUBSI sat_subsi3 {}
+
+[future-64]
+ const signed long __builtin_saturate_subtract64 (signed long, signed long);
+ SAT_SUBDI sat_subdi3 {}
+
BSTZ_P10,
BSTZ_P10_64,
BSTZ_MMA,
+ BSTZ_FUTURE,
+ BSTZ_FUTURE_64,
+ BSTZ_DM,
NUMBIFSTANZAS
};
{ "htm", BSTZ_HTM },
{ "power10", BSTZ_P10 },
{ "power10-64", BSTZ_P10_64 },
- { "mma", BSTZ_MMA }
+ { "mma", BSTZ_MMA },
+ { "future", BSTZ_FUTURE },
+ { "future-64", BSTZ_FUTURE_64 },
+ { "dm", BSTZ_DM },
};
static const char *enable_string[NUMBIFSTANZAS] =
"ENB_HTM",
"ENB_P10",
"ENB_P10_64",
- "ENB_MMA"
+ "ENB_MMA",
+ "ENB_FUTURE",
+ "ENB_FUTURE_64",
+ "ENB_DM",
};
/* Function modifiers provide special handling for const, pure, and fpmath
bool isendian;
bool isibmld;
bool isibm128;
+ bool isfuture;
+ bool isdm;
};
/* Fields associated with a function prototype (bif or overload). */
"ldvec = %d, stvec = %d, reve = %d, pred = %d, htm = %d, "
"htmspr = %d, htmcr = %d, mma = %d, quad = %d, pair = %d, "
"mmaint = %d, no32bit = %d, 32bit = %d, cpu = %d, ldstmask = %d, "
- "lxvrse = %d, lxvrze = %d, endian = %d, ibmdld = %d, ibm128 = %d.\n",
+ "lxvrse = %d, lxvrze = %d, endian = %d, ibmdld = %d, ibm128 = %d,",
+ "future = %d, dm = %d.\n",
attrptr->isinit, attrptr->isset, attrptr->isextract,
attrptr->isnosoft, attrptr->isldvec, attrptr->isstvec,
attrptr->isreve, attrptr->ispred, attrptr->ishtm, attrptr->ishtmspr,
attrptr->ismmaint, attrptr->isno32bit, attrptr->is32bit,
attrptr->iscpu, attrptr->isldstmask, attrptr->islxvrse,
attrptr->islxvrze, attrptr->isendian, attrptr->isibmld,
- attrptr->isibm128);
+ attrptr->isibm128, attrptr->isfuture, attrptr->isdm);
#endif
return PC_OK;
fprintf (header_file, " ENB_HTM,\n");
fprintf (header_file, " ENB_P10,\n");
fprintf (header_file, " ENB_P10_64,\n");
- fprintf (header_file, " ENB_MMA\n");
+ fprintf (header_file, " ENB_MMA,\n");
+ fprintf (header_file, " ENB_FUTURE,\n");
+ fprintf (header_file, " ENB_FUTURE_64,\n");
+ fprintf (header_file, " ENB_DM\n");
fprintf (header_file, "};\n\n");
fprintf (header_file, "#define PPC_MAXRESTROPNDS 3\n");
fprintf (header_file, "#define bif_endian_bit\t\t(0x00200000)\n");
fprintf (header_file, "#define bif_ibmld_bit\t\t(0x00400000)\n");
fprintf (header_file, "#define bif_ibm128_bit\t\t(0x00800000)\n");
+ fprintf (header_file, "#define bif_future_bit\t\t(0x01000000)\n");
+ fprintf (header_file, "#define bif_dm_bit\t\t(0x02000000)\n");
fprintf (header_file, "\n");
fprintf (header_file,
"#define bif_is_init(x)\t\t((x).bifattrs & bif_init_bit)\n");
"#define bif_is_ibmld(x)\t((x).bifattrs & bif_ibmld_bit)\n");
fprintf (header_file,
"#define bif_is_ibm128(x)\t((x).bifattrs & bif_ibm128_bit)\n");
+ fprintf (header_file,
+ "#define bif_is_future(x)\t((x).bifattrs & bif_future_bit)\n");
+ fprintf (header_file,
+ "#define bif_is_dm(x)\t((x).bifattrs & bif_dm_bit)\n");
fprintf (header_file, "\n");
fprintf (header_file,
fprintf (init_file, " | bif_ibmld_bit");
if (bifp->attrs.isibm128)
fprintf (init_file, " | bif_ibm128_bit");
+ if (bifp->attrs.isfuture)
+ fprintf (init_file, " | bif_future_bit");
+ if (bifp->attrs.isdm)
+ fprintf (init_file, " | bif_dm_bit");
fprintf (init_file, ",\n");
fprintf (init_file, " /* restr_opnd */\t{%d, %d, %d},\n",
bifp->proto.restr_opnd[0], bifp->proto.restr_opnd[1],
}
[(set_attr "type" "load")])
\f
+;; Signed saturation.
+
+;; The subfus instruction is defined as: SUBFUS RT,L,RA,RB. The extended
+;; mnemonic that we use (subdus and subwus) has the arguments RA and RB
+;; reversed (so it becomes a subtract instead of subtract from).
+
+(define_insn "sat_sub<mode>3"
+ [(set (match_operand:GPR 0 "gpc_reg_operand" "=r")
+ (ss_minus:GPR (match_operand:GPR 1 "gpc_reg_operand" "r")
+ (match_operand:GPR 2 "gpc_reg_operand" "r")))]
+ "TARGET_FUTURE"
+ "sub<wd>us %0,%1,%2"
+ [(set_attr "type" "add")])
+
+(define_insn_and_split "*sat_sub<mode>3_dot"
+ [(set (match_operand:CC 3 "cc_reg_operand" "=x,?y")
+ (compare:CC (ss_minus:GPR (match_operand:GPR 1 "gpc_reg_operand" "r,r")
+ (match_operand:GPR 2 "gpc_reg_operand" "r,r"))
+ (const_int 0)))
+ (clobber (match_scratch:GPR 0 "=r,r"))]
+ "TARGET_FUTURE"
+ "@
+ sub<wd>us. %0,%1,%2
+ #"
+ "&& reload_completed && cc_reg_not_cr0_operand (operands[3], CCmode)"
+ [(set (match_dup 0)
+ (ss_minus:GPR (match_dup 1)
+ (match_dup 2)))
+ (set (match_dup 3)
+ (compare:CC (match_dup 0)
+ (const_int 0)))]
+ ""
+ [(set_attr "type" "add")
+ (set_attr "dot" "yes")
+ (set_attr "length" "4,8")])
+
+(define_insn_and_split "*sat_sub<mode>3_dot2"
+ [(set (match_operand:CC 3 "cc_reg_operand" "=x,?y")
+ (compare:CC (ss_minus:GPR (match_operand:GPR 1 "gpc_reg_operand" "r,r")
+ (match_operand:GPR 2 "gpc_reg_operand" "r,r"))
+ (const_int 0)))
+ (set (match_operand:GPR 0 "gpc_reg_operand" "=r,r")
+ (ss_minus:GPR (match_dup 1)
+ (match_dup 2)))]
+ "TARGET_FUTURE"
+ "@
+ sub<wd>us. %0,%1,%2
+ #"
+ "&& reload_completed && cc_reg_not_cr0_operand (operands[3], CCmode)"
+ [(set (match_dup 0)
+ (ss_minus:GPR (match_dup 1)
+ (match_dup 2)))
+ (set (match_dup 3)
+ (compare:CC (match_dup 0)
+ (const_int 0)))]
+ ""
+ [(set_attr "type" "add")
+ (set_attr "dot" "yes")
+ (set_attr "length" "4,8")])
+\f
(include "sync.md")
(include "vector.md")
* Basic PowerPC Built-in Functions Available on ISA 2.07::
* Basic PowerPC Built-in Functions Available on ISA 3.0::
* Basic PowerPC Built-in Functions Available on ISA 3.1::
+* Basic Built-in Functions that may be available on future PowerPCs::
@end menu
This section describes PowerPC built-in functions that do not require
instructions.
@findex vec_xst_trunc
+@node Basic Built-in Functions that may be available on future PowerPCs
+@subsubsection Potential future PowerPC Built-in Functions
+
+The built-in functions described in this section may be available on
+future PowerPC processors. At present, these built-ins exist to
+allowing testing of new instructions. There is no guarantee that
+these instructions will actually be implemented.
+
+The following built-in functions are available on Linux 64-bit systems
+that use a potential future instruction set (@option{-mcpu=future}):
+
+@table @code
+@item int __builtin_saturate_subtract32 (int, int)
+Subtract the second operand from the first operand. If the value
+would be less than 0, then the result is 0 instead of the negative
+value of the subtraction.
+
+@item long __builtin_saturate_subtract64 (long, long)
+Subtract the second operand from the first operand. If the value
+would be less than 0, then the result is 0 instead of the negative
+value of the subtraction.
+@end table
+
@node PowerPC AltiVec/VSX Built-in Functions
@subsection PowerPC AltiVec/VSX Built-in Functions
--- /dev/null
+/* { dg-do compile } */
+/* { dg-require-effective-target powerpc_future_ok } */
+/* { dg-options "-mdejagnu-cpu=future -O2" } */
+
+/* Test whether the saturating subtract built-in generates subwus for 32-bit
+ subtracts. */
+
+int do_sat_int (int a, int b)
+{
+ return __builtin_saturate_subtract32 (a, b); /* subwus */
+}
+
+int do_sat_int_dot (int a, int b, int *p)
+{
+ int r = __builtin_saturate_subtract32 (a, b); /* subwus. */
+ if (r == 0)
+ *p = 0;
+
+ return r;
+}
+
+void do_sat_int_dot2 (int a, int b, int *p, int *q)
+{
+ if (__builtin_saturate_subtract32 (a, b)) /* subwus. */
+ *p = 0;
+
+ *q = a + b;
+ return;
+}
+
+/* { dg-final { scan-assembler {\msubwus\M} } } */
+/* { dg-final { scan-assembler-not {\msubf\M} } } */
--- /dev/null
+/* { dg-do compile { target lp64 } } */
+/* { dg-require-effective-target powerpc_future_ok } */
+/* { dg-options "-mdejagnu-cpu=future -O2" } */
+
+/* Test whether the saturating subtract built-in generates subwus for 64-bit
+ subtracts. */
+
+long do_sat_long (long a, long b)
+{
+ return __builtin_saturate_subtract64 (a, b); /* subwus */
+}
+
+long do_sat_long_dot (long a, long b, long *p)
+{
+ long r = __builtin_saturate_subtract64 (a, b); /* subwus. */
+ if (r == 0)
+ *p = 0;
+
+ return r;
+}
+
+void do_sat_long_dot2 (long a, long b, long *p, long *q)
+{
+ if (__builtin_saturate_subtract64 (a, b)) /* subwus. */
+ *p = 0;
+
+ *q = a + b;
+ return;
+}
+
+/* { dg-final { scan-assembler {\msubdus\M} } } */
+/* { dg-final { scan-assembler-not {\msubf\M} } } */
}
}
-# Return 1 if this is a PowerPC target supporting -mcpu=future or -mdense-math
-# which enables the dense math operations.
+# Return 1 if this is a PowerPC target supporting -mcpu=future which enables
+# the dense math operations.
proc check_effective_target_powerpc_dense_math_ok { } {
return [check_no_compiler_messages_nocache powerpc_dense_math_ok assembly {
__vector_quad vq;
} "-mcpu=future"]
}
+# Return 1 if this is a PowerPC target supporting -mcpu=future which enables
+# the saturating subtract instruction.
+proc check_effective_target_powerpc_future_ok { } {
+ return [check_no_compiler_messages powerpc_future_ok object {
+ #ifndef _ARCH_PWR_FUTURE
+ #error "not -mcpu=future"
+ #else
+ int dummy;
+ #endif
+ } "-mcpu=future"]
+}
+
# Return 1 if this is a PowerPC target supporting -mfloat128 via either
# software emulation on power7/power8 systems or hardware support on power9.
git://gcc.gnu.org / gcc.git / commitdiff