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Alan Modra <alan@linuxcare.com.au>
* config/i386/i386.c (output_387_binary_op): Correct intel
mode assembly output, and add spaces after commas in AT&T
output. Correct Unixware assembler comment. Document input
constraints. Comment fp operations. Reduce profligate buffer
size. Remove extraneous abort. Localize temp var.
(SYSV386_COMPAT): Define. Add !SYSV386_COMPAT code.
(output_fix_trunc): Add spaces after commas in assembly output.
From-SVN: r32778
This commit is contained in:
Alan Modra
Richard Henderson
parent
161897403e
commit
e3c2afabd3
@ -1,3 +1,13 @@
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2000-03-27 Alan Modra <alan@linuxcare.com.au>
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* config/i386/i386.c (output_387_binary_op): Correct intel
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mode assembly output, and add spaces after commas in AT&T
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output. Correct Unixware assembler comment. Document input
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constraints. Comment fp operations. Reduce profligate buffer
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size. Remove extraneous abort. Localize temp var.
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(SYSV386_COMPAT): Define. Add !SYSV386_COMPAT code.
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(output_fix_trunc): Add spaces after commas in assembly output.
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2000-03-27 Richard Henderson <rth@cygnus.com>
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* i386-protos.h (ix86_match_ccmode): Declare.
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@ -575,8 +585,8 @@ Thu Mar 23 11:34:39 2000 Jim Wilson <wilson@cygnus.com>
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Thu Mar 23 16:04:40 2000 Andrew Haley <aph@cygnus.com>
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* config/mips/mips.md (movdf_internal1a): Delete (set 'f', 'F')
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alternative when using -fp64 -gp32.
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* config/mips/mips.md (movdf_internal1a): Delete (set 'f', 'F')
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alternative when using -fp64 -gp32.
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2000-03-22 Jason Merrill <jason@casey.cygnus.com>
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@ -594,7 +604,7 @@ Thu Mar 23 16:04:40 2000 Andrew Haley <aph@cygnus.com>
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2000-03-22 Theodore Papadopoulo <Theodore.Papadopoulo@sophia.inria.fr>
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* builtin.c (get_pointer_alignment): Use DECL_P and TYPE_P macros.
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* builtin.c (get_pointer_alignment): Use DECL_P and TYPE_P macros.
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* c-common.c (decl_attributes,check_format_info,truthvalue_conversion,
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c_get_alias_set): Likewise.
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* c-decl.c (duplicate_decls): Likewise.
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@ -679,7 +689,7 @@ Wed Mar 22 11:44:50 MET 2000 Jan Hubicka <jh@suse.cz>
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2000-03-21 Richard Henderson <rth@cygnus.com>
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* flow.c (delete_block): Fix typo last change.
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* flow.c (delete_block): Fix typo last change.
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2000-03-21 Mark Mitchell <mark@codesourcery.com>
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@ -3434,15 +3434,39 @@ split_di (operands, num, lo_half, hi_half)
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There is no guarantee that the operands are the same mode, as they
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might be within FLOAT or FLOAT_EXTEND expressions. */
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#ifndef SYSV386_COMPAT
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/* Set to 1 for compatibility with brain-damaged assemblers. No-one
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wants to fix the assemblers because that causes incompatibility
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with gcc. No-one wants to fix gcc because that causes
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incompatibility with assemblers... You can use the option of
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-DSYSV386_COMPAT=0 if you recompile both gcc and gas this way. */
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#define SYSV386_COMPAT 1
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#endif
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const char *
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output_387_binary_op (insn, operands)
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rtx insn;
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rtx *operands;
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{
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static char buf[100];
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rtx temp;
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static char buf[30];
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const char *p;
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#ifdef ENABLE_CHECKING
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/* Even if we do not want to check the inputs, this documents input
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constraints. Which helps in understanding the following code. */
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if (STACK_REG_P (operands[0])
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&& ((REG_P (operands[1])
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&& REGNO (operands[0]) == REGNO (operands[1])
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&& (STACK_REG_P (operands[2]) || GET_CODE (operands[2]) == MEM))
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|| (REG_P (operands[2])
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&& REGNO (operands[0]) == REGNO (operands[2])
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&& (STACK_REG_P (operands[1]) || GET_CODE (operands[1]) == MEM)))
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&& (STACK_TOP_P (operands[1]) || STACK_TOP_P (operands[2])))
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; /* ok */
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else
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abort ();
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#endif
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switch (GET_CODE (operands[3]))
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{
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case PLUS:
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@ -3489,11 +3513,13 @@ output_387_binary_op (insn, operands)
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case PLUS:
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if (REG_P (operands[2]) && REGNO (operands[0]) == REGNO (operands[2]))
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{
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temp = operands[2];
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rtx temp = operands[2];
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operands[2] = operands[1];
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operands[1] = temp;
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}
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/* know operands[0] == operands[1]. */
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if (GET_CODE (operands[2]) == MEM)
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{
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p = "%z2\t%2";
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@ -3503,16 +3529,23 @@ output_387_binary_op (insn, operands)
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if (find_regno_note (insn, REG_DEAD, REGNO (operands[2])))
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{
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if (STACK_TOP_P (operands[0]))
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p = "p\t{%0,%2|%2, %0}";
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/* How is it that we are storing to a dead operand[2]?
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Well, presumably operands[1] is dead too. We can't
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store the result to st(0) as st(0) gets popped on this
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instruction. Instead store to operands[2] (which I
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think has to be st(1)). st(1) will be popped later.
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gcc <= 2.8.1 didn't have this check and generated
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assembly code that the Unixware assembler rejected. */
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p = "p\t{%0, %2|%2, %0}"; /* st(1) = st(0) op st(1); pop */
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else
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p = "p\t{%2,%0|%0, %2}";
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p = "p\t{%2, %0|%0, %2}"; /* st(r1) = st(r1) op st(0); pop */
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break;
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}
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if (STACK_TOP_P (operands[0]))
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p = "\t{%y2,%0|%0, %y2}";
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p = "\t{%y2, %0|%0, %y2}"; /* st(0) = st(0) op st(r2) */
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else
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p = "\t{%2,%0|%0, %2}";
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p = "\t{%2, %0|%0, %2}"; /* st(r1) = st(r1) op st(0) */
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break;
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case MINUS:
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@ -3529,42 +3562,69 @@ output_387_binary_op (insn, operands)
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break;
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}
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if (! STACK_REG_P (operands[1]) || ! STACK_REG_P (operands[2]))
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abort ();
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/* Note that the Unixware assembler, and the AT&T assembler before
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that, are confusingly not reversed from Intel syntax in this
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area. */
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if (find_regno_note (insn, REG_DEAD, REGNO (operands[2])))
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{
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#if SYSV386_COMPAT
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/* The SystemV/386 SVR3.2 assembler, and probably all AT&T
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derived assemblers, confusingly reverse the direction of
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the operation for fsub{r} and fdiv{r} when the
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destination register is not st(0). The Intel assembler
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doesn't have this brain damage. Read !SYSV386_COMPAT to
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figure out what the hardware really does. */
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if (STACK_TOP_P (operands[0]))
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p = "p\t%0,%2";
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p = "{p\t%0, %2|rp\t%2, %0}";
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else
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p = "rp\t%2,%0";
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p = "{rp\t%2, %0|p\t%0, %2}";
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#else
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if (STACK_TOP_P (operands[0]))
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/* As above for fmul/fadd, we can't store to st(0). */
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p = "rp\t{%0, %2|%2, %0}"; /* st(1) = st(0) op st(1); pop */
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else
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p = "p\t{%2, %0|%0, %2}"; /* st(r1) = st(r1) op st(0); pop */
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#endif
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break;
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}
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if (find_regno_note (insn, REG_DEAD, REGNO (operands[1])))
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{
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#if SYSV386_COMPAT
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if (STACK_TOP_P (operands[0]))
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p = "rp\t%0,%1";
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p = "{rp\t%0, %1|p\t%1, %0}";
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else
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p = "p\t%1,%0";
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p = "{p\t%1, %0|rp\t%0, %1}";
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#else
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if (STACK_TOP_P (operands[0]))
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p = "p\t{%0, %1|%1, %0}"; /* st(1) = st(1) op st(0); pop */
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else
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p = "rp\t{%1, %0|%0, %1}"; /* st(r2) = st(0) op st(r2); pop */
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#endif
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break;
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}
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if (STACK_TOP_P (operands[0]))
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{
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if (STACK_TOP_P (operands[1]))
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p = "\t%y2,%0";
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p = "\t{%y2, %0|%0, %y2}"; /* st(0) = st(0) op st(r2) */
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else
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p = "r\t%y1,%0";
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p = "r\t{%y1, %0|%0, %y1}"; /* st(0) = st(r1) op st(0) */
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break;
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}
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else if (STACK_TOP_P (operands[1]))
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p = "\t%1,%0";
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{
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#if SYSV386_COMPAT
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p = "{\t%1, %0|r\t%0, %1}";
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#else
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p = "r\t{%1, %0|%0, %1}"; /* st(r2) = st(0) op st(r2) */
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#endif
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}
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else
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p = "r\t%2,%0";
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{
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#if SYSV386_COMPAT
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p = "{r\t%2, %0|\t%0, %2}";
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#else
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p = "\t{%2, %0|%0, %2}"; /* st(r1) = st(r1) op st(0) */
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#endif
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}
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break;
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default:
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@ -3628,7 +3688,7 @@ output_fix_trunc (insn, operands)
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output_asm_insn ("mov{l}\t{%3, %1|%1, %3}", xops);
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}
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else
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output_asm_insn ("mov{l}\t{%3,%0|%0, %3}", operands);
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output_asm_insn ("mov{l}\t{%3, %0|%0, %3}", operands);
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}
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return "";
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