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riscv-gcc-1
Commit a5f3dd66 by Kelley Cook Committed by Jim Wilson
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re PR rtl-optimization/4490 (ICE with -m128bit-long-double) 

	PR optimization/4490
	* config/i386/i386.md: Don't use XFMode if TARGET_128BIT_LONG_DOUBLE.
	* doc/invoke.texi (m96bit-long-double, m128bit-long-double):  Reword
	documentation to accurately reflect what these options do.

From-SVN: r67528
parent 25119b21
Showing with 83 additions and 65 deletions
gcc/ChangeLog
2003-06-05 Kelley Cook <kelleycook@wideopenwest.com>
PR optimization/4490
* config/i386/i386.md: Don't use XFMode if TARGET_128BIT_LONG_DOUBLE.
* doc/invoke.texi (m96bit-long-double, m128bit-long-double): Reword
documentation to accurately reflect what these options do.
2003-06-06 Kaz Kojima <kkojima@gcc.gnu.org>
* config/sh/linux.h (STARTFILE_SPEC): Handle -pie. Simplify.
......
gcc/config/i386/i386.md
......@@ -707,7 +707,7 @@
[(set (reg:CC 17)
(compare:CC (match_operand:XF 0 "cmp_fp_expander_operand" "")
(match_operand:XF 1 "cmp_fp_expander_operand" "")))]
"!TARGET_64BIT && TARGET_80387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387"
{
ix86_compare_op0 = operands[0];
ix86_compare_op1 = operands[1];
......@@ -841,7 +841,7 @@
(compare:CCFP
(match_operand:XF 0 "register_operand" "f")
(match_operand:XF 1 "register_operand" "f")))]
"!TARGET_64BIT && TARGET_80387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387"
"* return output_fp_compare (insn, operands, 0, 0);"
[(set_attr "type" "fcmp")
(set_attr "mode" "XF")])
......@@ -863,7 +863,7 @@
(match_operand:XF 1 "register_operand" "f")
(match_operand:XF 2 "register_operand" "f"))]
UNSPEC_FNSTSW))]
"!TARGET_64BIT && TARGET_80387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387"
"* return output_fp_compare (insn, operands, 2, 0);"
[(set_attr "type" "multi")
(set_attr "mode" "XF")])
......@@ -2740,7 +2740,7 @@
(define_expand "movxf"
[(set (match_operand:XF 0 "nonimmediate_operand" "")
(match_operand:XF 1 "general_operand" ""))]
"!TARGET_64BIT"
"!TARGET_128BIT_LONG_DOUBLE"
"ix86_expand_move (XFmode, operands); DONE;")
(define_expand "movtf"
......@@ -2759,7 +2759,7 @@
(define_insn "*pushxf_nointeger"
[(set (match_operand:XF 0 "push_operand" "=X,X,X")
(match_operand:XF 1 "general_no_elim_operand" "f,Fo,*r"))]
"!TARGET_64BIT && optimize_size"
"!TARGET_128BIT_LONG_DOUBLE && optimize_size"
{
/* This insn should be already splitted before reg-stack. */
abort ();
......@@ -2781,7 +2781,7 @@
(define_insn "*pushxf_integer"
[(set (match_operand:XF 0 "push_operand" "=<,<")
(match_operand:XF 1 "general_no_elim_operand" "f#r,ro#f"))]
"!TARGET_64BIT && !optimize_size"
"!TARGET_128BIT_LONG_DOUBLE && !optimize_size"
{
/* This insn should be already splitted before reg-stack. */
abort ();
......@@ -2814,7 +2814,7 @@
(define_split
[(set (match_operand:XF 0 "push_operand" "")
(match_operand:XF 1 "any_fp_register_operand" ""))]
"!TARGET_64BIT"
"!TARGET_128BIT_LONG_DOUBLE"
[(set (reg:SI 7) (plus:SI (reg:SI 7) (const_int -12)))
(set (mem:XF (reg:SI 7)) (match_dup 1))])
......@@ -2836,7 +2836,7 @@
(define_insn "*movxf_nointeger"
[(set (match_operand:XF 0 "nonimmediate_operand" "=f,m,f,*r,o")
(match_operand:XF 1 "general_operand" "fm,f,G,*roF,F*r"))]
"!TARGET_64BIT
"!TARGET_128BIT_LONG_DOUBLE
&& optimize_size
&& (GET_CODE (operands[0]) != MEM || GET_CODE (operands[1]) != MEM)
&& (reload_in_progress || reload_completed
......@@ -2926,7 +2926,7 @@
(define_insn "*movxf_integer"
[(set (match_operand:XF 0 "nonimmediate_operand" "=f#r,m,f#r,r#f,o")
(match_operand:XF 1 "general_operand" "fm#r,f#r,G,roF#f,Fr#f"))]
"!TARGET_64BIT
"!TARGET_128BIT_LONG_DOUBLE
&& !optimize_size
&& (GET_CODE (operands[0]) != MEM || GET_CODE (operands[1]) != MEM)
&& (reload_in_progress || reload_completed
......@@ -3593,7 +3593,7 @@
(define_split
[(set (match_operand:XF 0 "push_operand" "")
(float_extend:XF (match_operand:SF 1 "fp_register_operand" "")))]
"!TARGET_64BIT"
"!TARGET_128BIT_LONG_DOUBLE"
[(set (reg:SI 7) (plus:SI (reg:SI 7) (const_int -12)))
(set (mem:XF (reg:SI 7)) (float_extend:XF (match_dup 1)))])
......@@ -3626,7 +3626,7 @@
(define_split
[(set (match_operand:XF 0 "push_operand" "")
(float_extend:XF (match_operand:DF 1 "fp_register_operand" "")))]
"!TARGET_64BIT"
"!TARGET_128BIT_LONG_DOUBLE"
[(set (reg:SI 7) (plus:SI (reg:SI 7) (const_int -12)))
(set (mem:DF (reg:SI 7)) (float_extend:XF (match_dup 1)))])
......@@ -3708,7 +3708,7 @@
(define_expand "extendsfxf2"
[(set (match_operand:XF 0 "nonimmediate_operand" "")
(float_extend:XF (match_operand:SF 1 "general_operand" "")))]
"!TARGET_64BIT && TARGET_80387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387"
{
/* ??? Needed for compress_float_constant since all fp constants
are LEGITIMATE_CONSTANT_P. */
......@@ -3721,7 +3721,7 @@
(define_insn "*extendsfxf2_1"
[(set (match_operand:XF 0 "nonimmediate_operand" "=f,m")
(float_extend:XF (match_operand:SF 1 "nonimmediate_operand" "fm,f")))]
"!TARGET_64BIT && TARGET_80387
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387
&& (GET_CODE (operands[0]) != MEM || GET_CODE (operands[1]) != MEM)"
{
switch (which_alternative)
......@@ -3798,7 +3798,7 @@
(define_expand "extenddfxf2"
[(set (match_operand:XF 0 "nonimmediate_operand" "")
(float_extend:XF (match_operand:DF 1 "general_operand" "")))]
"!TARGET_64BIT && TARGET_80387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387"
{
/* ??? Needed for compress_float_constant since all fp constants
are LEGITIMATE_CONSTANT_P. */
......@@ -3811,7 +3811,7 @@
(define_insn "*extenddfxf2_1"
[(set (match_operand:XF 0 "nonimmediate_operand" "=f,m")
(float_extend:XF (match_operand:DF 1 "nonimmediate_operand" "fm,f")))]
"!TARGET_64BIT && TARGET_80387
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387
&& (GET_CODE (operands[0]) != MEM || GET_CODE (operands[1]) != MEM)"
{
switch (which_alternative)
......@@ -4130,7 +4130,7 @@
(float_truncate:SF
(match_operand:XF 1 "register_operand" "")))
(clobber (match_dup 2))])]
"!TARGET_64BIT && TARGET_80387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387"
"operands[2] = assign_386_stack_local (SFmode, 0);")
(define_insn "*truncxfsf2_1"
......@@ -4138,7 +4138,7 @@
(float_truncate:SF
(match_operand:XF 1 "register_operand" "f,f,f,f")))
(clobber (match_operand:SF 2 "memory_operand" "=X,m,m,m"))]
"!TARGET_64BIT && TARGET_80387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387"
{
switch (which_alternative)
{
......@@ -4158,7 +4158,7 @@
[(set (match_operand:SF 0 "memory_operand" "=m")
(float_truncate:SF
(match_operand:XF 1 "register_operand" "f")))]
"!TARGET_64BIT && TARGET_80387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387"
{
if (find_regno_note (insn, REG_DEAD, REGNO (operands[1])))
return "fstp%z0\t%y0";
......@@ -4255,7 +4255,7 @@
(float_truncate:DF
(match_operand:XF 1 "register_operand" "")))
(clobber (match_dup 2))])]
"!TARGET_64BIT && TARGET_80387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387"
"operands[2] = assign_386_stack_local (DFmode, 0);")
(define_insn "*truncxfdf2_1"
......@@ -4263,7 +4263,7 @@
(float_truncate:DF
(match_operand:XF 1 "register_operand" "f,f,f,f")))
(clobber (match_operand:DF 2 "memory_operand" "=X,m,m,m"))]
"!TARGET_64BIT && TARGET_80387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387"
{
switch (which_alternative)
{
......@@ -4284,7 +4284,7 @@
[(set (match_operand:DF 0 "memory_operand" "=m")
(float_truncate:DF
(match_operand:XF 1 "register_operand" "f")))]
"!TARGET_64BIT && TARGET_80387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387"
{
if (find_regno_note (insn, REG_DEAD, REGNO (operands[1])))
return "fstp%z0\t%y0";
......@@ -4384,7 +4384,7 @@
(define_expand "fix_truncxfdi2"
[(set (match_operand:DI 0 "nonimmediate_operand" "")
(fix:DI (match_operand:XF 1 "register_operand" "")))]
"!TARGET_64BIT && TARGET_80387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387"
"")
(define_expand "fix_trunctfdi2"
......@@ -4551,7 +4551,7 @@
(define_expand "fix_truncxfsi2"
[(set (match_operand:SI 0 "nonimmediate_operand" "")
(fix:SI (match_operand:XF 1 "register_operand" "")))]
"!TARGET_64BIT && TARGET_80387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387"
"")
(define_expand "fix_trunctfsi2"
......@@ -4712,7 +4712,7 @@
(define_expand "fix_truncxfhi2"
[(set (match_operand:HI 0 "nonimmediate_operand" "")
(fix:HI (match_operand:XF 1 "register_operand" "")))]
"!TARGET_64BIT && TARGET_80387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387"
"")
(define_expand "fix_trunctfhi2"
......@@ -5064,7 +5064,7 @@
(define_insn "floathixf2"
[(set (match_operand:XF 0 "register_operand" "=f,f")
(float:XF (match_operand:HI 1 "nonimmediate_operand" "m,r")))]
"!TARGET_64BIT && TARGET_80387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387"
"@
fild%z1\t%1
#"
......@@ -5086,7 +5086,7 @@
(define_insn "floatsixf2"
[(set (match_operand:XF 0 "register_operand" "=f,f")
(float:XF (match_operand:SI 1 "nonimmediate_operand" "m,r")))]
"!TARGET_64BIT && TARGET_80387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387"
"@
fild%z1\t%1
#"
......@@ -5108,7 +5108,7 @@
(define_insn "floatdixf2"
[(set (match_operand:XF 0 "register_operand" "=f,f")
(float:XF (match_operand:DI 1 "nonimmediate_operand" "m,r")))]
"!TARGET_64BIT && TARGET_80387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387"
"@
fild%z1\t%1
#"
......@@ -6819,7 +6819,7 @@
[(set (match_operand:XF 0 "register_operand" "")
(plus:XF (match_operand:XF 1 "register_operand" "")
(match_operand:XF 2 "register_operand" "")))]
"!TARGET_64BIT && TARGET_80387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387"
"")
(define_expand "addtf3"
......@@ -7172,7 +7172,7 @@
[(set (match_operand:XF 0 "register_operand" "")
(minus:XF (match_operand:XF 1 "register_operand" "")
(match_operand:XF 2 "register_operand" "")))]
"!TARGET_64BIT && TARGET_80387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387"
"")
(define_expand "subtf3"
......@@ -7690,7 +7690,7 @@
[(set (match_operand:XF 0 "register_operand" "")
(mult:XF (match_operand:XF 1 "register_operand" "")
(match_operand:XF 2 "register_operand" "")))]
"!TARGET_64BIT && TARGET_80387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387"
"")
(define_expand "multf3"
......@@ -7744,7 +7744,7 @@
[(set (match_operand:XF 0 "register_operand" "")
(div:XF (match_operand:XF 1 "register_operand" "")
(match_operand:XF 2 "register_operand" "")))]
"!TARGET_64BIT && TARGET_80387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387"
"")
(define_expand "divtf3"
......@@ -10157,7 +10157,7 @@
[(parallel [(set (match_operand:XF 0 "nonimmediate_operand" "")
(neg:XF (match_operand:XF 1 "nonimmediate_operand" "")))
(clobber (reg:CC 17))])]
"!TARGET_64BIT && TARGET_80387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387"
"ix86_expand_unary_operator (NEG, XFmode, operands); DONE;")
(define_expand "negtf2"
......@@ -10174,7 +10174,7 @@
[(set (match_operand:XF 0 "nonimmediate_operand" "=f#r,rm#f")
(neg:XF (match_operand:XF 1 "nonimmediate_operand" "0,0")))
(clobber (reg:CC 17))]
"!TARGET_64BIT && TARGET_80387
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387
&& ix86_unary_operator_ok (NEG, XFmode, operands)"
"#")
......@@ -10262,7 +10262,7 @@
(define_insn "*negxf2_1"
[(set (match_operand:XF 0 "register_operand" "=f")
(neg:XF (match_operand:XF 1 "register_operand" "0")))]
"!TARGET_64BIT && TARGET_80387 && reload_completed"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387 && reload_completed"
"fchs"
[(set_attr "type" "fsgn")
(set_attr "mode" "XF")
......@@ -10272,7 +10272,7 @@
[(set (match_operand:XF 0 "register_operand" "=f")
(neg:XF (float_extend:XF
(match_operand:DF 1 "register_operand" "0"))))]
"!TARGET_64BIT && TARGET_80387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387"
"fchs"
[(set_attr "type" "fsgn")
(set_attr "mode" "XF")
......@@ -10282,7 +10282,7 @@
[(set (match_operand:XF 0 "register_operand" "=f")
(neg:XF (float_extend:XF
(match_operand:SF 1 "register_operand" "0"))))]
"!TARGET_64BIT && TARGET_80387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387"
"fchs"
[(set_attr "type" "fsgn")
(set_attr "mode" "XF")
......@@ -10619,7 +10619,7 @@
[(parallel [(set (match_operand:XF 0 "nonimmediate_operand" "")
(neg:XF (match_operand:XF 1 "nonimmediate_operand" "")))
(clobber (reg:CC 17))])]
"!TARGET_64BIT && TARGET_80387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387"
"ix86_expand_unary_operator (ABS, XFmode, operands); DONE;")
(define_expand "abstf2"
......@@ -10636,7 +10636,7 @@
[(set (match_operand:XF 0 "nonimmediate_operand" "=f#r,rm#f")
(abs:XF (match_operand:XF 1 "nonimmediate_operand" "0,0")))
(clobber (reg:CC 17))]
"!TARGET_64BIT && TARGET_80387
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387
&& ix86_unary_operator_ok (ABS, XFmode, operands)"
"#")
......@@ -10715,7 +10715,7 @@
(define_insn "*absxf2_1"
[(set (match_operand:XF 0 "register_operand" "=f")
(abs:XF (match_operand:XF 1 "register_operand" "0")))]
"!TARGET_64BIT && TARGET_80387 && reload_completed"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387 && reload_completed"
"fabs"
[(set_attr "type" "fsgn")
(set_attr "mode" "DF")])
......@@ -10724,7 +10724,7 @@
[(set (match_operand:XF 0 "register_operand" "=f")
(abs:XF (float_extend:XF
(match_operand:DF 1 "register_operand" "0"))))]
"!TARGET_64BIT && TARGET_80387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387"
"fabs"
[(set_attr "type" "fsgn")
(set_attr "mode" "XF")])
......@@ -10733,7 +10733,7 @@
[(set (match_operand:XF 0 "register_operand" "=f")
(abs:XF (float_extend:XF
(match_operand:SF 1 "register_operand" "0"))))]
"!TARGET_64BIT && TARGET_80387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387"
"fabs"
[(set_attr "type" "fsgn")
(set_attr "mode" "XF")])
......@@ -14803,7 +14803,7 @@
(match_operator:XF 3 "binary_fp_operator"
[(match_operand:XF 1 "register_operand" "%0")
(match_operand:XF 2 "register_operand" "f")]))]
"!TARGET_64BIT && TARGET_80387
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387
&& GET_RTX_CLASS (GET_CODE (operands[3])) == 'c'"
"* return output_387_binary_op (insn, operands);"
[(set (attr "type")
......@@ -15079,7 +15079,7 @@
(match_operator:XF 3 "binary_fp_operator"
[(match_operand:XF 1 "register_operand" "0,f")
(match_operand:XF 2 "register_operand" "f,0")]))]
"!TARGET_64BIT && TARGET_80387
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387
&& GET_RTX_CLASS (GET_CODE (operands[3])) != 'c'"
"* return output_387_binary_op (insn, operands);"
[(set (attr "type")
......@@ -15113,7 +15113,7 @@
(match_operator:XF 3 "binary_fp_operator"
[(float:XF (match_operand:SI 1 "nonimmediate_operand" "m,?r"))
(match_operand:XF 2 "register_operand" "0,0")]))]
"!TARGET_64BIT && TARGET_80387 && TARGET_USE_FIOP"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387 && TARGET_USE_FIOP"
"* return which_alternative ? \"#\" : output_387_binary_op (insn, operands);"
[(set (attr "type")
(cond [(match_operand:XF 3 "mult_operator" "")
......@@ -15149,7 +15149,7 @@
(match_operator:XF 3 "binary_fp_operator"
[(match_operand:XF 1 "register_operand" "0,0")
(float:XF (match_operand:SI 2 "nonimmediate_operand" "m,?r"))]))]
"!TARGET_64BIT && TARGET_80387 && TARGET_USE_FIOP"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387 && TARGET_USE_FIOP"
"* return which_alternative ? \"#\" : output_387_binary_op (insn, operands);"
[(set (attr "type")
(cond [(match_operand:XF 3 "mult_operator" "")
......@@ -15185,7 +15185,7 @@
(match_operator:XF 3 "binary_fp_operator"
[(float_extend:XF (match_operand 1 "nonimmediate_operand" "fm,0"))
(match_operand:XF 2 "register_operand" "0,f")]))]
"!TARGET_64BIT && TARGET_80387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387"
"* return output_387_binary_op (insn, operands);"
[(set (attr "type")
(cond [(match_operand:XF 3 "mult_operator" "")
......@@ -15218,7 +15218,7 @@
[(match_operand:XF 1 "register_operand" "0,f")
(float_extend:XF
(match_operand 2 "nonimmediate_operand" "fm,0"))]))]
"!TARGET_64BIT && TARGET_80387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387"
"* return output_387_binary_op (insn, operands);"
[(set (attr "type")
(cond [(match_operand:XF 3 "mult_operator" "")
......@@ -15253,7 +15253,7 @@
(match_operand 1 "register_operand" "0,f"))
(float_extend:XF
(match_operand 2 "nonimmediate_operand" "fm,0"))]))]
"!TARGET_64BIT && TARGET_80387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387"
"* return output_387_binary_op (insn, operands);"
[(set (attr "type")
(cond [(match_operand:XF 3 "mult_operator" "")
......@@ -15419,7 +15419,7 @@
(define_insn "sqrtxf2"
[(set (match_operand:XF 0 "register_operand" "=f")
(sqrt:XF (match_operand:XF 1 "register_operand" "0")))]
"!TARGET_64BIT && TARGET_80387 && !TARGET_NO_FANCY_MATH_387
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387 && !TARGET_NO_FANCY_MATH_387
&& (TARGET_IEEE_FP || flag_unsafe_math_optimizations) "
"fsqrt"
[(set_attr "type" "fpspc")
......@@ -15440,7 +15440,7 @@
[(set (match_operand:XF 0 "register_operand" "=f")
(sqrt:XF (float_extend:XF
(match_operand:DF 1 "register_operand" "0"))))]
"!TARGET_64BIT && TARGET_80387 && !TARGET_NO_FANCY_MATH_387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387 && !TARGET_NO_FANCY_MATH_387"
"fsqrt"
[(set_attr "type" "fpspc")
(set_attr "mode" "XF")
......@@ -15460,7 +15460,7 @@
[(set (match_operand:XF 0 "register_operand" "=f")
(sqrt:XF (float_extend:XF
(match_operand:SF 1 "register_operand" "0"))))]
"!TARGET_64BIT && TARGET_80387 && !TARGET_NO_FANCY_MATH_387"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387 && !TARGET_NO_FANCY_MATH_387"
"fsqrt"
[(set_attr "type" "fpspc")
(set_attr "mode" "XF")
......@@ -15508,7 +15508,7 @@
(define_insn "sinxf2"
[(set (match_operand:XF 0 "register_operand" "=f")
(unspec:XF [(match_operand:XF 1 "register_operand" "0")] UNSPEC_SIN))]
"!TARGET_64BIT && TARGET_80387 && !TARGET_NO_FANCY_MATH_387
"!TARGET_128BIT_LONG_DOUBLE && TARGET_80387 && !TARGET_NO_FANCY_MATH_387
&& flag_unsafe_math_optimizations"
"fsin"
[(set_attr "type" "fpspc")
......@@ -15555,7 +15555,7 @@
(define_insn "cosxf2"
[(set (match_operand:XF 0 "register_operand" "=f")
(unspec:XF [(match_operand:XF 1 "register_operand" "0")] UNSPEC_COS))]
"!TARGET_64BIT && ! TARGET_NO_FANCY_MATH_387 && TARGET_80387
"!TARGET_128BIT_LONG_DOUBLE && ! TARGET_NO_FANCY_MATH_387 && TARGET_80387
&& flag_unsafe_math_optimizations"
"fcos"
[(set_attr "type" "fpspc")
......@@ -16975,7 +16975,7 @@
(if_then_else:XF (match_operand 1 "comparison_operator" "")
(match_operand:XF 2 "register_operand" "")
(match_operand:XF 3 "register_operand" "")))]
"!TARGET_64BIT && TARGET_CMOVE"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_CMOVE"
"if (! ix86_expand_fp_movcc (operands)) FAIL; DONE;")
(define_expand "movtfcc"
......@@ -16992,7 +16992,7 @@
[(reg 17) (const_int 0)])
(match_operand:XF 2 "register_operand" "f,0")
(match_operand:XF 3 "register_operand" "0,f")))]
"!TARGET_64BIT && TARGET_CMOVE"
"!TARGET_128BIT_LONG_DOUBLE && TARGET_CMOVE"
"@
fcmov%F1\t{%2, %0|%0, %2}
fcmov%f1\t{%3, %0|%0, %3}"
......
gcc/doc/invoke.texi
......@@ -8242,22 +8242,33 @@ the published application binary interface specifications for the 386
and will not be binary compatible with structures in code compiled
without that switch.
@item -m96bit-long-double
@item -m128bit-long-double
@opindex m96bit-long-double
@opindex m128bit-long-double
Control the size of @code{long double} type. i386 application binary interface
specify the size to be 12 bytes, while modern architectures (Pentium and newer)
prefer @code{long double} aligned to 8 or 16 byte boundary. This is
impossible to reach with 12 byte long doubles in the array accesses.
These switches control the size of @code{long double} type. The i386
application binary interface specifies the size to be 96 bits,
so @option{-m96bit-long-double} is the default in 32 bit mode.
Modern architectures (Pentium and newer) would prefer @code{long double}
to be aligned to an 8 or 16 byte boundary. In arrays or structures
conforming to the ABI, this would not be possible. So specifying a
@option{-m128bit-long-double} will align @code{long double}
to a 16 byte boundary by padding the @code{long double} with an additional
32 bit zero.
In the x86-64 compiler, @option{-m128bit-long-double} is the default choice as
its ABI specifies that @code{long double} is to be aligned on 16 byte boundary.
Notice that neither of these options enable any extra precision over the x87
standard of 80 bits for a @code{long double}.
@strong{Warning:} if you use the @option{-m128bit-long-double} switch, the
@strong{Warning:} if you override the default value for your target ABI, the
structures and arrays containing @code{long double} will change their size as
well as function calling convention for function taking @code{long double}
will be modified.
will be modified. Hence they will not be binary compatible with arrays or
structures in code compiled without that switch.
@item -m96bit-long-double
@opindex m96bit-long-double
Set the size of @code{long double} to 96 bits as required by the i386
application binary interface. This is the default.
@item -msvr3-shlib
@itemx -mno-svr3-shlib
......
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