https://gcc.gnu.org/g:6b1371b1e50c60933fb2754d02dec7244df0a2b6
commit 6b1371b1e50c60933fb2754d02dec7244df0a2b6 Author: Michael Meissner <[email protected]> Date: Fri May 15 13:27:16 2026 -0400 Revert changes Diff: --- gcc/config/rs6000/constraints.md | 10 --- gcc/config/rs6000/predicates.md | 57 ++------------ gcc/config/rs6000/rs6000.cc | 12 --- gcc/config/rs6000/rs6000.h | 3 - gcc/config/rs6000/rs6000.md | 96 +++-------------------- gcc/doc/md.texi | 6 -- gcc/testsuite/gcc.target/powerpc/prefixed-addis.c | 24 ------ 7 files changed, 20 insertions(+), 188 deletions(-) diff --git a/gcc/config/rs6000/constraints.md b/gcc/config/rs6000/constraints.md index 0169a7b85222..0d1cde5bd4de 100644 --- a/gcc/config/rs6000/constraints.md +++ b/gcc/config/rs6000/constraints.md @@ -222,16 +222,6 @@ "An IEEE 128-bit constant that can be loaded into VSX registers." (match_operand 0 "easy_vector_constant_ieee128")) -(define_constraint "eU" - "@internal integer constant that can be loaded with paddis" - (and (match_code "const_int") - (match_operand 0 "paddis_operand"))) - -(define_constraint "eV" - "@A signed integer constant that paddis and paddi instructions generate." - (and (match_code "const_int") - (match_operand 0 "paddis_paddi_operand"))) - ;; Floating-point constraints. These two are defined so that insn ;; length attributes can be calculated exactly. diff --git a/gcc/config/rs6000/predicates.md b/gcc/config/rs6000/predicates.md index 113139cf2d6d..737eafc2bc58 100644 --- a/gcc/config/rs6000/predicates.md +++ b/gcc/config/rs6000/predicates.md @@ -378,45 +378,6 @@ return SIGNED_INTEGER_34BIT_P (INTVAL (op)); }) -;; Return 1 if op is a 64-bit constant that uses the paddis instruction -(define_predicate "paddis_operand" - (match_code "const_int") -{ - if (!TARGET_PADDIS) - return false; - - /* If addi, addis, or paddi can handle the number, don't return true. */ - HOST_WIDE_INT value = INTVAL (op); - if (SIGNED_INTEGER_34BIT_P (value)) - return false; - - /* If the bottom 32-bits are non-zero, paddis can't handle it. */ - if ((value & HOST_WIDE_INT_C(0xffffffff)) != 0) - return false; - - return true; -}) - -;; Return 1 if op is a 64-bit constant that can be created with a -;; combination of paddi and paddis -(define_predicate "paddis_paddi_operand" - (match_code "const_int") -{ - if (!TARGET_PADDIS) - return false; - - /* If addi, addis, or paddi can handle the number, don't return true. */ - HOST_WIDE_INT value = INTVAL (op); - if (SIGNED_INTEGER_34BIT_P (value)) - return false; - - /* Only return true if we need both paddi and paddis. */ - if ((value & HOST_WIDE_INT_C(0xffffffff)) == 0) - return false; - - return true; -}) - ;; Return 1 if op is a register that is not special. ;; Disallow (SUBREG:SF (REG:SI)) and (SUBREG:SI (REG:SF)) on VSX systems where ;; you need to be careful in moving a SFmode to SImode and vice versa due to @@ -607,15 +568,12 @@ (ior (match_operand 0 "zero_constant") (match_operand 0 "gpc_reg_operand"))) -;; Return 1 if op is a constant integer valid for addition with addis, -;; addi, paddi, or paddis. +;; Return 1 if op is a constant integer valid for addition with addis, addi. (define_predicate "add_cint_operand" (and (match_code "const_int") - (ior (match_test "((unsigned HOST_WIDE_INT) INTVAL (op) - + (mode == SImode ? 0x80000000 : 0x80008000)) - < (unsigned HOST_WIDE_INT) 0x100000000ll") - (match_operand 0 "cint34_operand") - (match_operand 0 "paddis_operand")))) + (match_test "((unsigned HOST_WIDE_INT) INTVAL (op) + + (mode == SImode ? 0x80000000 : 0x80008000)) + < (unsigned HOST_WIDE_INT) 0x100000000ll"))) ;; Return 1 if op is a constant integer valid for addition ;; or non-special register. @@ -1162,10 +1120,9 @@ ;; as the operand of a `mode' add insn. (define_predicate "add_operand" (if_then_else (match_code "const_int") - (ior (match_test "TARGET_PADDIS") - (match_test "satisfies_constraint_I (op) - || satisfies_constraint_L (op) - || satisfies_constraint_eI (op)")) + (match_test "satisfies_constraint_I (op) + || satisfies_constraint_L (op) + || satisfies_constraint_eI (op)") (match_operand 0 "gpc_reg_operand"))) ;; Return 1 if the operand is either a non-special register, or 0, or -1. diff --git a/gcc/config/rs6000/rs6000.cc b/gcc/config/rs6000/rs6000.cc index c0d60618759a..f24f5f095bf1 100644 --- a/gcc/config/rs6000/rs6000.cc +++ b/gcc/config/rs6000/rs6000.cc @@ -6166,10 +6166,6 @@ num_insns_constant_gpr (HOST_WIDE_INT value) else if (TARGET_PREFIXED && SIGNED_INTEGER_34BIT_P (value)) return 1; - /* PADDIS support. */ - else if (TARGET_PADDIS) - return ((value & HOST_WIDE_INT_C(0xffffffff)) != 0) ? 2 : 1; - else if (TARGET_POWERPC64) { int num_insns = 0; @@ -14280,14 +14276,6 @@ print_operand (FILE *file, rtx x, int code) fprintf (file, "%d", (REGNO (x) - FIRST_FPR_REGNO) / 4); return; - case 'B': - /* Upper 32-bits of a constant. */ - if (!CONST_INT_P (x)) - output_operand_lossage ("Not a constant."); - - fprintf (file, "%" HOST_LONG_FORMAT "d", INTVAL (x) >> 32); - return; - case 'D': /* Like 'J' but get to the GT bit only. */ if (!REG_P (x) || !CR_REGNO_P (REGNO (x))) diff --git a/gcc/config/rs6000/rs6000.h b/gcc/config/rs6000/rs6000.h index 366602d2e45c..3f50a44cc3d5 100644 --- a/gcc/config/rs6000/rs6000.h +++ b/gcc/config/rs6000/rs6000.h @@ -570,9 +570,6 @@ extern int rs6000_vector_align[]; /* Whether we have XVRLW support. */ #define TARGET_XVRLW TARGET_FUTURE -/* Whether we have PADDIS support. */ -#define TARGET_PADDIS (TARGET_FUTURE && TARGET_POWERPC64) - /* Whether the various reciprocal divide/square root estimate instructions exist, and whether we should automatically generate code for the instruction by default. */ diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md index 91a9770e33f5..dfe0402813ce 100644 --- a/gcc/config/rs6000/rs6000.md +++ b/gcc/config/rs6000/rs6000.md @@ -371,7 +371,7 @@ (const (symbol_ref "(enum attr_cpu) rs6000_tune"))) ;; The ISA we implement. -(define_attr "isa" "any,p5,p6,p7,p7v,p8,p8v,p9,p9v,p9kf,p9tf,p10,paddis" +(define_attr "isa" "any,p5,p6,p7,p7v,p8,p8v,p9,p9v,p9kf,p9tf,p10" (const_string "any")) ;; Is this alternative enabled for the current CPU/ISA/etc.? @@ -423,11 +423,6 @@ (and (eq_attr "isa" "p10") (match_test "TARGET_POWER10")) (const_int 1) - - (and (eq_attr "isa" "paddis") - (match_test "TARGET_PADDIS")) - (const_int 1) - ] (const_int 0))) ;; If this instruction is microcoded on the CELL processor @@ -1850,42 +1845,17 @@ }) (define_insn "*add<mode>3" - [(set (match_operand:GPR 0 "gpc_reg_operand" "=r,r,r,r,r,b") - (plus:GPR (match_operand:GPR 1 "gpc_reg_operand" "%r,b,b,b,b,b") - (match_operand:GPR 2 "add_operand" "r,I,L,eI,eU,eV")))] + [(set (match_operand:GPR 0 "gpc_reg_operand" "=r,r,r,r") + (plus:GPR (match_operand:GPR 1 "gpc_reg_operand" "%r,b,b,b") + (match_operand:GPR 2 "add_operand" "r,I,L,eI")))] "" "@ add %0,%1,%2 addi %0,%1,%2 addis %0,%1,%v2 - addi %0,%1,%2 - paddis %0,%1,%B2 - #" + addi %0,%1,%2" [(set_attr "type" "add") - (set_attr "isa" "*,*,*,p10,paddis,paddis") - (set_attr "length" "*,*,*,*,12,24") - (set_attr "prefixed" "*,*,*,*,yes,yes") - (set_attr "maybe_prefixed" "*,*,*,*,no,no")]) - -(define_split - [(set (match_operand:DI 0 "gpc_reg_operand") - (plus:DI (match_operand:DI 1 "gpc_reg_operand") - (match_operand:DI 2 "paddis_paddi_operand")))] - "TARGET_PADDIS" - [(set (match_dup 3) - (plus:DI (match_dup 1) - (match_dup 4))) - (set (match_dup 0) - (plus:DI (match_dup 3) - (match_dup 5)))] -{ - HOST_WIDE_INT value = INTVAL (operands[2]); - operands[3] = (can_create_pseudo_p () - ? gen_reg_rtx (DImode) - : operands[0]); - operands[4] = GEN_INT (value & ~HOST_WIDE_INT_C (0xffffffff)); - operands[5] = GEN_INT (value & HOST_WIDE_INT_C (0xffffffff)); -}) + (set_attr "isa" "*,*,*,p10")]) (define_insn "*addsi3_high" [(set (match_operand:SI 0 "gpc_reg_operand" "=b") @@ -9908,7 +9878,7 @@ DONE; }) -;; GPR store GPR load GPR move GPR paddis GPR paddis+paddi +;; GPR store GPR load GPR move ;; GPR li GPR lis GPR pli GPR # ;; FPR store FPR load FPR move ;; AVX store AVX store AVX load AVX load VSX move @@ -9918,7 +9888,7 @@ ;; VSX->GPR GPR->VSX (define_insn "*movdi_internal64" [(set (match_operand:DI 0 "nonimmediate_operand" - "=YZ, r, r, r, b, + "=YZ, r, r, r, r, r, r, m, ^d, ^d, wY, Z, $v, $v, ^wa, @@ -9927,7 +9897,7 @@ r, *h, *h, ?r, ?wa") (match_operand:DI 1 "input_operand" - "r, YZ, r, eU, eV, + "r, YZ, r, I, L, eI, nF, ^d, m, ^d, ^v, $v, wY, Z, ^wa, @@ -9942,8 +9912,6 @@ std%U0%X0 %1,%0 ld%U1%X1 %0,%1 mr %0,%1 - paddis %0,0,%B1 - # li %0,%1 lis %0,%v1 li %0,%1 @@ -9969,7 +9937,7 @@ mfvsrd %0,%x1 mtvsrd %x0,%1" [(set_attr "type" - "store, load, *, *, *, + "store, load, *, *, *, *, *, fpstore, fpload, fpsimple, fpstore, fpstore, fpload, fpload, veclogical, @@ -9979,7 +9947,7 @@ mfvsr, mtvsr") (set_attr "size" "64") (set_attr "length" - "*, *, *, 12, 24, + "*, *, *, *, *, *, 20, *, *, *, *, *, *, *, *, @@ -9988,32 +9956,14 @@ *, *, *, *, *") (set_attr "isa" - "*, *, *, paddis, paddis, + "*, *, *, *, *, p10, *, *, *, *, p9v, p7v, p9v, p7v, *, p9v, p9v, p7v, *, *, p7v, p7v, *, *, *, - p8v, p8v") - (set_attr "prefixed" - "*, *, *, yes, yes, - *, *, *, *, - *, *, *, - *, *, *, *, *, - *, *, *, *, *, - *, *, - *, *, *, - *, *") - (set_attr "maybe_prefixed" - "*, *, *, no, no, - *, *, *, *, - *, *, *, - *, *, *, *, *, - *, *, *, *, *, - *, *, - *, *, *, - *, *")]) + p8v, p8v")]) ; Some DImode loads are best done as a load of -1 followed by a mask ; instruction. @@ -10031,26 +9981,6 @@ (match_dup 1)))] "") -;; Split a constant that can be generated by a paddis and paddi into 2 -;; instructions. -(define_split - [(set (match_operand:DI 0 "int_reg_operand") - (match_operand:DI 1 "paddis_paddi_operand"))] - "TARGET_PADDIS" - [(set (match_dup 2) - (match_dup 3)) - (set (match_dup 0) - (plus:DI (match_dup 2) - (match_dup 4)))] -{ - HOST_WIDE_INT value = INTVAL (operands[1]); - operands[2] = (can_create_pseudo_p () - ? gen_reg_rtx (DImode) - : operands[0]); - operands[3] = GEN_INT (value & ~HOST_WIDE_INT_C (0xffffffff)); - operands[4] = GEN_INT (value & HOST_WIDE_INT_C (0xffffffff)); -}) - ;; Split a load of a large constant into the appropriate five-instruction ;; sequence. Handle anything in a constant number of insns. ;; When non-easy constants can go in the TOC, this should use diff --git a/gcc/doc/md.texi b/gcc/doc/md.texi index 21b392e68952..5d6fefdeacae 100644 --- a/gcc/doc/md.texi +++ b/gcc/doc/md.texi @@ -3360,12 +3360,6 @@ loaded to a VSX register with one prefixed instruction. An IEEE 128-bit constant that can be loaded into a VSX register with the @code{lxvkq} instruction. -@item eU -A signed integer constant that can be used with the paddis instruction. - -@item eU -A signed integer constant that paddis and paddi instructions generate. - @ifset INTERNALS @item G A floating point constant that can be loaded into a register with one diff --git a/gcc/testsuite/gcc.target/powerpc/prefixed-addis.c b/gcc/testsuite/gcc.target/powerpc/prefixed-addis.c deleted file mode 100644 index d08e3675f94c..000000000000 --- a/gcc/testsuite/gcc.target/powerpc/prefixed-addis.c +++ /dev/null @@ -1,24 +0,0 @@ -/* { dg-do compile } */ -/* { dg-require-effective-target powerpc_future_ok } */ -/* { dg-require-effective-target lp64 } */ -/* { dg-options "-mdejagnu-cpu=future -O2" } */ - -/* Test whether the xvrl (vector word rotate left using VSX registers insead of - Altivec registers is generated. */ - -#include <stddef.h> - -size_t -prefix_addis_addi (size_t x) -{ - return x + 0x123456789ABCDEUL; /* paddis + paddi. */ -} - -size_t -prefix_addis (size_t x) -{ - return x + 0x12345600000000UL; /* paddis. */ -} - -/* { dg-final { scan-assembler-times {\mpaddis\M} 2 } } */ -/* { dg-final { scan-assembler-times {\mpaddi\M} 1 } } */
