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+Date: Sun, 05 Oct 1997 19:14:09 -0400 (EDT)
+From: Weiwen Liu <liu@hepvms.physics.yale.edu>
+Subject: Re: complex support on alpha
+In-reply-to: <199710020532.WAA16123@dot.cygnus.com>
+X-Sender: liu@hepunix1.physics.yale.edu
+To: rth@cygnus.com
+Cc: egcs@cygnus.com
+Message-id: <Pine.OSF.3.96.971005190110.31383A-100000@hepunix1.physics.yale.edu>
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+Precedence: bulk
+
+On Wed, 1 Oct 1997, Richard Henderson wrote:
+
+> Well, it is enough to compile those examples properly, but it is
+> not completely correct. The problem is that complex numbers should
+> be treated as two distinct arguments on Alpha, which affects padding
+> of the arguments passed on the stack.
+>
+
+Here is a patch for it. It should be applied against egcs-970929.
+Beside fixing complex-5.c in the testsuite, egcs with this patch generates
+the same result from 'make check-gcc' as without it.
+
+On an alpha-dec-osf4.0, this patch correctly compiles the following test
+program with F=char, short, int, long, float, double:
+#ifndef F
+#define F float
+#endif
+
+typedef __complex__ F FC;
+
+FC f1(int odd, FC a, FC b, FC c)
+{
+ return a + b + c;
+}
+
+FC f2a(F a, F b, F c, F d, F e, F f, F g, F h)
+{
+ return (a + c + e + g) + 1i * (b + d + f + h);
+}
+
+FC f2b(FC a, FC b, FC c, FC d)
+{
+ return a + b + c + d;
+}
+
+int main()
+{
+ FC a, b, c, d, e;
+ a = 1 + 2i;
+ b = 3+4i;
+ c = 5+6i;
+ d = 7+8i;
+
+ e = f1(1,a,b,c);
+ if (e != 9+12i)
+ abort ();
+ e=f2b(a,b,c,d);
+ if (e != 16+20i)
+ abort ();
+ e=f2a(1,2,3,4,5,6,7,8);
+ if (e != 16+20i)
+ abort ();
+ return 0;
+}
+
+This patch has only been tested on alpha-dec-osf4.0, because I have no
+access to other machines. To support compless on other machines, the
+machine-dependent tm.h has to be modified similarly to what is done for
+alpha.h here.
+
+Weiwen
+
+Sun Oct 5 19:00:00 Weiwen Liu <liu@hepunix.phycis.yale.edu>
+
+ * c-tree.h: Define complex_long_integer_type_node
+ to support __complex__ long.
+ * c-decl.c (init_decl_processing): Initialize
+ complex_long_integer_type_node.
+ * c-lex.c (yylex): Enable __complex__ long.
+
+ * expr.h: Define COMPLEX_WORD_MODE and GET_COMPLEX_MODE_SIZE.
+ * emit-rtl.c (gen_lowpart_common, gen_highpart,
+ operand_subword): Use them.
+ * expr.c (move_block_to_reg, emit_push_insn): Use them.
+
+ * emit-rtl.c (operand_subword): Deal with a complex mode.
+
+ * regs.h: Correctly calculate REG_SIZE for a complex mode.
+
+ * config/alpha/alpha.h: Correctly deal with a complex mode in
+ HARD_REGNO_NREGS, FUNCTION_VALUE, ALPHA_ARG_SIZE.
+
+*** gcc/c-decl.c.orig Sat Sep 27 14:16:06 1997
+--- gcc/c-decl.c Wed Oct 1 16:19:39 1997
+*************** tree double_type_node;
+*** 135,140 ****
+--- 135,141 ----
+ tree long_double_type_node;
+
+ tree complex_integer_type_node;
++ tree complex_long_integer_type_node;
+ tree complex_float_type_node;
+ tree complex_double_type_node;
+ tree complex_long_double_type_node;
+*************** init_decl_processing ()
+*** 2989,2994 ****
+--- 2990,3001 ----
+ complex_integer_type_node));
+ TREE_TYPE (complex_integer_type_node) = integer_type_node;
+ layout_type (complex_integer_type_node);
++
++ complex_long_integer_type_node = make_node (COMPLEX_TYPE);
++ pushdecl (build_decl (TYPE_DECL, get_identifier ("complex long int"),
++ complex_long_integer_type_node));
++ TREE_TYPE (complex_long_integer_type_node) = long_integer_type_node;
++ layout_type (complex_long_integer_type_node);
+
+ complex_float_type_node = make_node (COMPLEX_TYPE);
+ pushdecl (build_decl (TYPE_DECL, get_identifier ("complex float"),
+*** gcc/c-lex.c.orig Fri Aug 15 01:32:53 1997
+--- gcc/c-lex.c Wed Oct 1 16:19:39 1997
+*************** yylex ()
+*** 1769,1774 ****
+--- 1769,1780 ----
+ = build_complex (NULL_TREE, integer_zero_node,
+ convert (integer_type_node,
+ yylval.ttype));
++ else if (TYPE_PRECISION (type)
++ <= TYPE_PRECISION (long_integer_type_node))
++ yylval.ttype
++ = build_complex (NULL_TREE, integer_zero_node,
++ convert (long_integer_type_node,
++ yylval.ttype));
+ else
+ error ("complex integer constant is too wide for `complex int'");
+ }
+*** gcc/c-tree.h.orig Mon Aug 11 11:57:03 1997
+--- gcc/c-tree.h Wed Oct 1 16:19:40 1997
+*************** extern tree long_long_integer_type_node;
+*** 219,224 ****
+--- 219,225 ----
+ extern tree long_long_unsigned_type_node;
+ extern tree long_unsigned_type_node;
+ extern tree complex_integer_type_node;
++ extern tree complex_long_integer_type_node;
+ extern tree complex_float_type_node;
+ extern tree complex_double_type_node;
+ extern tree complex_long_double_type_node;
+*** gcc/emit-rtl.c.orig Mon Sep 22 13:41:24 1997
+--- gcc/emit-rtl.c Sun Oct 5 17:48:05 1997
+*************** gen_lowpart_common (mode, x)
+*** 635,644 ****
+ / UNITS_PER_WORD)))
+ return 0;
+
+! if (WORDS_BIG_ENDIAN && GET_MODE_SIZE (GET_MODE (x)) > UNITS_PER_WORD)
+! word = ((GET_MODE_SIZE (GET_MODE (x))
+! - MAX (GET_MODE_SIZE (mode), UNITS_PER_WORD))
+! / UNITS_PER_WORD);
+
+ if ((GET_CODE (x) == ZERO_EXTEND || GET_CODE (x) == SIGN_EXTEND)
+ && (GET_MODE_CLASS (mode) == MODE_INT
+--- 635,644 ----
+ / UNITS_PER_WORD)))
+ return 0;
+
+! if (WORDS_BIG_ENDIAN && GET_MODE_SIZE (GET_MODE (x)) >0)
+! word = GET_COMPLEX_MODE_SIZE (GET_MODE (x))
+! - ((GET_MODE_SIZE (mode) + (UNITS_PER_WORD - 1))
+! / UNITS_PER_WORD);
+
+ if ((GET_CODE (x) == ZERO_EXTEND || GET_CODE (x) == SIGN_EXTEND)
+ && (GET_MODE_CLASS (mode) == MODE_INT
+*************** gen_highpart (mode, x)
+*** 1013,1022 ****
+ int word = 0;
+
+ if (! WORDS_BIG_ENDIAN
+! && GET_MODE_SIZE (GET_MODE (x)) > UNITS_PER_WORD)
+! word = ((GET_MODE_SIZE (GET_MODE (x))
+! - MAX (GET_MODE_SIZE (mode), UNITS_PER_WORD))
+! / UNITS_PER_WORD);
+
+ /*
+ * ??? This fails miserably for complex values being passed in registers
+--- 1013,1022 ----
+ int word = 0;
+
+ if (! WORDS_BIG_ENDIAN
+! && GET_MODE_SIZE (GET_MODE (x)) > 0)
+! word = GET_COMPLEX_MODE_SIZE (GET_MODE (x))
+! - ((GET_MODE_SIZE (mode) + (UNITS_PER_WORD - 1))
+! / UNITS_PER_WORD);
+
+ /*
+ * ??? This fails miserably for complex values being passed in registers
+*************** operand_subword (op, i, validate_address
+*** 1100,1105 ****
+--- 1100,1107 ----
+
+ /* If OP is narrower than a word or if we want a word outside OP, fail. */
+ if (mode != BLKmode
++ && (GET_MODE_CLASS (mode) != MODE_COMPLEX_INT
++ && GET_MODE_CLASS (mode) != MODE_COMPLEX_FLOAT)
+ && (GET_MODE_SIZE (mode) < UNITS_PER_WORD
+ || (i + 1) * UNITS_PER_WORD > GET_MODE_SIZE (mode)))
+ return 0;
+*************** operand_subword (op, i, validate_address
+*** 1127,1133 ****
+ || op == arg_pointer_rtx
+ #endif
+ || op == stack_pointer_rtx)
+! return gen_rtx (SUBREG, word_mode, op, i);
+ else
+ return gen_rtx (REG, word_mode, REGNO (op) + i);
+ }
+--- 1129,1135 ----
+ || op == arg_pointer_rtx
+ #endif
+ || op == stack_pointer_rtx)
+! return gen_rtx (SUBREG, COMPLEX_WORD_MODE (mode), op, i);
+ else
+ return gen_rtx (REG, word_mode, REGNO (op) + i);
+ }
+*************** operand_subword (op, i, validate_address
+*** 1135,1141 ****
+ return gen_rtx (SUBREG, word_mode, SUBREG_REG (op), i + SUBREG_WORD (op));
+ else if (GET_CODE (op) == CONCAT)
+ {
+! int partwords = GET_MODE_UNIT_SIZE (GET_MODE (op)) / UNITS_PER_WORD;
+ if (i < partwords)
+ return operand_subword (XEXP (op, 0), i, validate_address, mode);
+ return operand_subword (XEXP (op, 1), i - partwords,
+--- 1137,1144 ----
+ return gen_rtx (SUBREG, word_mode, SUBREG_REG (op), i + SUBREG_WORD (op));
+ else if (GET_CODE (op) == CONCAT)
+ {
+! int partwords = (GET_MODE_UNIT_SIZE (GET_MODE (op))
+! + (UNITS_PER_WORD - 1))/ UNITS_PER_WORD;
+ if (i < partwords)
+ return operand_subword (XEXP (op, 0), i, validate_address, mode);
+ return operand_subword (XEXP (op, 1), i - partwords,
+*************** operand_subword (op, i, validate_address
+*** 1145,1151 ****
+ /* Form a new MEM at the requested address. */
+ if (GET_CODE (op) == MEM)
+ {
+! rtx addr = plus_constant (XEXP (op, 0), i * UNITS_PER_WORD);
+ rtx new;
+
+ if (validate_address)
+--- 1148,1158 ----
+ /* Form a new MEM at the requested address. */
+ if (GET_CODE (op) == MEM)
+ {
+! rtx addr = plus_constant (
+! XEXP (op, 0),
+! (GET_MODE_CLASS (mode) == MODE_COMPLEX_INT
+! || GET_MODE_CLASS (mode) == MODE_COMPLEX_FLOAT)?
+! i*GET_MODE_UNIT_SIZE (mode): i * UNITS_PER_WORD);
+ rtx new;
+
+ if (validate_address)
+*************** operand_subword (op, i, validate_address
+*** 1159,1165 ****
+ addr = memory_address (word_mode, addr);
+ }
+
+! new = gen_rtx (MEM, word_mode, addr);
+
+ MEM_VOLATILE_P (new) = MEM_VOLATILE_P (op);
+ MEM_IN_STRUCT_P (new) = MEM_IN_STRUCT_P (op);
+--- 1166,1172 ----
+ addr = memory_address (word_mode, addr);
+ }
+
+! new = gen_rtx (MEM, COMPLEX_WORD_MODE (mode), addr);
+
+ MEM_VOLATILE_P (new) = MEM_VOLATILE_P (op);
+ MEM_IN_STRUCT_P (new) = MEM_IN_STRUCT_P (op);
+*** gcc/expr.c.orig Sat Oct 4 03:12:35 1997
+--- gcc/expr.c Sun Oct 5 18:21:18 1997
+*************** move_block_to_reg (regno, x, nregs, mode
+*** 1701,1707 ****
+ #endif
+
+ for (i = 0; i < nregs; i++)
+! emit_move_insn (gen_rtx (REG, word_mode, regno + i),
+ operand_subword_force (x, i, mode));
+ }
+
+--- 1701,1707 ----
+ #endif
+
+ for (i = 0; i < nregs; i++)
+! emit_move_insn (gen_rtx (REG, COMPLEX_WORD_MODE (mode), regno + i),
+ operand_subword_force (x, i, mode));
+ }
+
+*************** move_block_from_reg (regno, x, nregs, si
+*** 1724,1729 ****
+--- 1724,1731 ----
+ /* If SIZE is that of a mode no bigger than a word, just use that
+ mode's store operation. */
+ if (size <= UNITS_PER_WORD
++ && GET_MODE_CLASS (GET_MODE (x)) != MODE_COMPLEX_INT
++ && GET_MODE_CLASS (GET_MODE (x)) != MODE_COMPLEX_FLOAT
+ && (mode = mode_for_size (size * BITS_PER_UNIT, MODE_INT, 0)) != BLKmode)
+ {
+ emit_move_insn (change_address (x, mode, NULL),
+*************** move_block_from_reg (regno, x, nregs, si
+*** 1769,1780 ****
+
+ for (i = 0; i < nregs; i++)
+ {
+! rtx tem = operand_subword (x, i, 1, BLKmode);
+
+ if (tem == 0)
+ abort ();
+
+! emit_move_insn (tem, gen_rtx (REG, word_mode, regno + i));
+ }
+ }
+
+--- 1771,1786 ----
+
+ for (i = 0; i < nregs; i++)
+ {
+! rtx tem = operand_subword
+! (x, i, 1, (GET_MODE_CLASS(GET_MODE (x)) == MODE_COMPLEX_INT
+! || GET_MODE_CLASS(GET_MODE (x)) == MODE_COMPLEX_FLOAT)?
+! GET_MODE(x):BLKmode);
+
+ if (tem == 0)
+ abort ();
+
+! emit_move_insn (tem, gen_rtx (REG, COMPLEX_WORD_MODE (GET_MODE (x)),
+! regno + i));
+ }
+ }
+
+*************** emit_push_insn (x, mode, type, size, ali
+*** 2687,2693 ****
+ {
+ /* Scalar partly in registers. */
+
+! int size = GET_MODE_SIZE (mode) / UNITS_PER_WORD;
+ int i;
+ int not_stack;
+ /* # words of start of argument
+--- 2693,2699 ----
+ {
+ /* Scalar partly in registers. */
+
+! int size = GET_COMPLEX_MODE_SIZE (mode);
+ int i;
+ int not_stack;
+ /* # words of start of argument
+*************** emit_push_insn (x, mode, type, size, ali
+*** 2696,2701 ****
+--- 2702,2716 ----
+ int args_offset = INTVAL (args_so_far);
+ int skip;
+
++ /* For a complex argument passing partially in a register,
++ save the image part in stack immedially following the space
++ used for save the part passig in register (see function
++ assign_parms in function.c). */
++ if (GET_MODE_CLASS (mode) == MODE_COMPLEX_INT
++ || GET_MODE_CLASS (mode) == MODE_COMPLEX_FLOAT)
++ if (GET_MODE_UNIT_SIZE (mode) < UNITS_PER_WORD)
++ args_offset += GET_MODE_UNIT_SIZE (mode) - UNITS_PER_WORD;
++
+ /* Push padding now if padding above and stack grows down,
+ or if padding below and stack grows up.
+ But if space already allocated, this has already been done. */
+*************** emit_push_insn (x, mode, type, size, ali
+*** 2742,2748 ****
+ #endif
+ if (i >= not_stack + offset)
+ emit_push_insn (operand_subword_force (x, i, mode),
+! word_mode, NULL_TREE, NULL_RTX, align, 0, NULL_RTX,
+ 0, args_addr,
+ GEN_INT (args_offset + ((i - not_stack + skip)
+ * UNITS_PER_WORD)));
+--- 2757,2764 ----
+ #endif
+ if (i >= not_stack + offset)
+ emit_push_insn (operand_subword_force (x, i, mode),
+! COMPLEX_WORD_MODE (mode),
+! NULL_TREE, NULL_RTX, align, 0, NULL_RTX,
+ 0, args_addr,
+ GEN_INT (args_offset + ((i - not_stack + skip)
+ * UNITS_PER_WORD)));
+*** gcc/expr.h.orig Sat Oct 4 23:46:34 1997
+--- gcc/expr.h Sun Oct 5 18:21:14 1997
+*************** extern void bc_adjust_stack PROTO ((in
+*** 952,954 ****
+--- 952,970 ----
+ extern void bc_load_localaddr PROTO ((rtx));
+ extern void do_jump_by_parts_greater_rtx PROTO ((enum machine_mode, int,
+ rtx, rtx, rtx, rtx));
++
++ /* Determine the mode for the imagine and real part of a complex MODE.
++ For a non-complex MODE, use WORD_MODE.*/
++ #define COMPLEX_WORD_MODE(MODE) \
++ (((GET_MODE_CLASS (MODE) == MODE_COMPLEX_INT \
++ || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT) \
++ && GET_MODE_UNIT_SIZE (MODE) < UNITS_PER_WORD)? \
++ mode_for_size (GET_MODE_UNIT_SIZE(MODE)*BITS_PER_UNIT, \
++ (GET_MODE_CLASS (MODE) == MODE_COMPLEX_INT)? \
++ MODE_INT:MODE_FLOAT, \
++ 0):word_mode)
++
++ /* Calculate number of bytes needed for a complex MODE */
++ #define GET_COMPLEX_MODE_SIZE(MODE) \
++ (((GET_MODE_UNIT_SIZE (MODE) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD) \
++ * (GET_MODE_SIZE (MODE)) / GET_MODE_UNIT_SIZE (MODE))
+*** gcc/regs.h.orig Mon Aug 11 11:57:12 1997
+--- gcc/regs.h Wed Oct 1 16:19:31 1997
+*************** Boston, MA 02111-1307, USA. */
+*** 27,33 ****
+ valid way to get this value. You cannot get it from the regno. */
+
+ #define REG_SIZE(R) \
+! ((mode_size[(int) GET_MODE (R)] + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
+
+ /* Maximum register number used in this function, plus one. */
+
+--- 27,36 ----
+ valid way to get this value. You cannot get it from the regno. */
+
+ #define REG_SIZE(R) \
+! (GET_MODE_SIZE (GET_MODE (R)) == 0? \
+! 0:(((GET_MODE_UNIT_SIZE (GET_MODE (R)) + (UNITS_PER_WORD - 1)) \
+! / UNITS_PER_WORD) * (GET_MODE_SIZE (GET_MODE (R)) \
+! / GET_MODE_UNIT_SIZE (GET_MODE (R)))))
+
+ /* Maximum register number used in this function, plus one. */
+
+*** gcc/config/alpha/alpha.h.orig Wed Oct 1 16:16:31 1997
+--- gcc/config/alpha/alpha.h Fri Oct 3 11:41:58 1997
+*************** extern void override_options ();
+*** 515,521 ****
+ but can be less for certain modes in special long registers. */
+
+ #define HARD_REGNO_NREGS(REGNO, MODE) \
+! ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
+
+ /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE.
+ On Alpha, the integer registers can hold any mode. The floating-point
+--- 515,524 ----
+ but can be less for certain modes in special long registers. */
+
+ #define HARD_REGNO_NREGS(REGNO, MODE) \
+! (GET_MODE_SIZE (MODE) == 0? \
+! 0:(((GET_MODE_UNIT_SIZE (MODE) + (UNITS_PER_WORD - 1)) \
+! / UNITS_PER_WORD) * (GET_MODE_SIZE (MODE) \
+! / GET_MODE_UNIT_SIZE (MODE))))
+
+ /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE.
+ On Alpha, the integer registers can hold any mode. The floating-point
+*************** enum reg_class { NO_REGS, GENERAL_REGS,
+*** 891,901 ****
+ #define FUNCTION_VALUE(VALTYPE, FUNC) \
+ gen_rtx (REG, \
+ (INTEGRAL_MODE_P (TYPE_MODE (VALTYPE)) \
+ && TYPE_PRECISION (VALTYPE) < BITS_PER_WORD) \
+ ? word_mode : TYPE_MODE (VALTYPE), \
+ ((TARGET_FPREGS \
+ && (TREE_CODE (VALTYPE) == REAL_TYPE \
+! || TREE_CODE (VALTYPE) == COMPLEX_TYPE)) \
+ ? 32 : 0))
+
+ /* Define how to find the value returned by a library function
+--- 894,908 ----
+ #define FUNCTION_VALUE(VALTYPE, FUNC) \
+ gen_rtx (REG, \
+ (INTEGRAL_MODE_P (TYPE_MODE (VALTYPE)) \
++ && (GET_MODE_CLASS(TYPE_MODE (VALTYPE)) \
++ != MODE_COMPLEX_INT) \
+ && TYPE_PRECISION (VALTYPE) < BITS_PER_WORD) \
+ ? word_mode : TYPE_MODE (VALTYPE), \
+ ((TARGET_FPREGS \
+ && (TREE_CODE (VALTYPE) == REAL_TYPE \
+! || TREE_CODE (VALTYPE) == COMPLEX_TYPE) \
+! && (GET_MODE_CLASS(TYPE_MODE (VALTYPE)) \
+! != MODE_COMPLEX_INT)) \
+ ? 32 : 0))
+
+ /* Define how to find the value returned by a library function
+*************** enum reg_class { NO_REGS, GENERAL_REGS,
+*** 953,959 ****
+
+ #define ALPHA_ARG_SIZE(MODE, TYPE, NAMED) \
+ ((MODE) != BLKmode \
+! ? (GET_MODE_SIZE (MODE) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD \
+ : (int_size_in_bytes (TYPE) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD)
+
+ /* Update the data in CUM to advance over an argument
+--- 960,969 ----
+
+ #define ALPHA_ARG_SIZE(MODE, TYPE, NAMED) \
+ ((MODE) != BLKmode \
+! ? (GET_MODE_SIZE (MODE) > 0? \
+! (GET_MODE_UNIT_SIZE (MODE) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD \
+! * GET_MODE_SIZE (MODE) / GET_MODE_UNIT_SIZE (MODE) \
+! : 0) \
+ : (int_size_in_bytes (TYPE) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD)
+
+ /* Update the data in CUM to advance over an argument
+
+
projects / deliverable / binutils-gdb.git / commitdiff
