soft-fp: Refactor exception handling for comparisons.

This patch refactors how soft-fp comparisons handle setting exceptions
for NaN operands, so that exceptions are set through the FP_CMP macros
rather than directly in the C files calling them.

The _FP_CMP* and FP_CMP* macros gain an extra argument to specify when
exceptions should be set, 0 for no exception setting (I'm not sure
this is actually needed - at least it's not needed for IEEE operations
in glibc / libgcc, but might be relevant in some cases for kernel
use), 1 for exceptions only for signaling NaNs and 2 for exceptions
for all NaNs.  This argument is handled through _FP_CMP_CHECK_NAN,
newly called by the _FP_CMP* macros when a NaN is encountered.  Calls
to these macros are updated, which eliminates all the existing
checking and exception setting in soft-fp *.c files in glibc.

Tested for powerpc-nofpu.  (The __unord* functions have no code
changes; the __eq* / __ge* / __le* functions get slightly larger, but
I don't think that's significant.)

	* soft-fp/op-common.h (_FP_CMP_CHECK_NAN): New macro.
	(_FP_CMP): Add extra argument EX.  Call _FP_CMP_CHECK_NAN.
	(_FP_CMP_EQ): Likewise.
	(_FP_CMP_UNORD): Likewise.
	* soft-fp/double.h (FP_CMP_D): Add extra argument EX.
	(FP_CMP_EQ_D): Likewise.
	(FP_CMP_UNORD_D): Likewise.
	* soft-fp/extended.h (FP_CMP_E): Likewise.
	(FP_CMP_EQ_E): Likewise.
	(FP_CMP_UNORD_E): Likewise.
	* soft-fp/quad.h (FP_CMP_Q): Likewise.
	(FP_CMP_EQ_Q): Likewise.
	(FP_CMP_UNORD_Q): Likewise.
	* soft-fp/single.h (FP_CMP_S): Likewise.
	(FP_CMP_EQ_S): Likewise.
	(FP_CMP_UNORD_S): Likewise.
	* soft-fp/eqdf2.c (__eqdf2): Update call to FP_CMP_EQ_D.
	* soft-fp/eqsf2.c (__eqsf2): Update call to FP_CMP_EQ_S.
	* soft-fp/eqtf2.c (__eqtf2): Update call to FP_CMP_EQ_Q.
	* soft-fp/gedf2.c (__gedf2): Update call to FP_CMP_D.
	* soft-fp/gesf2.c (__gesf2): Update call to FP_CMP_S.
	* soft-fp/getf2.c (__getf2): Update call to FP_CMP_Q.
	* soft-fp/ledf2.c (__ledf2): Update call to FP_CMP_D.
	* soft-fp/lesf2.c (__lesf2): Update call to FP_CMP_S.
	* soft-fp/letf2.c (__letf2): Update call to FP_CMP_Q.
	* soft-fp/unorddf2.c (__unorddf2): Update call to FP_CMP_UNORD_D.
	* soft-fp/unordsf2.c (__unordsf2): Update call to FP_CMP_UNORD_S.
	* soft-fp/unordtf2.c (__unordtf2): Update call to FP_CMP_UNORD_Q.
	* sysdeps/alpha/soft-fp/ots_cmpe.c (internal_compare): Update call
	to FP_CMP_Q.
	* sysdeps/sparc/sparc32/soft-fp/q_cmp.c (_Q_cmp): Update call to
	FP_CMP_Q.
	* sysdeps/sparc/sparc32/soft-fp/q_cmpe.c (_Q_cmpe): Likewise.
	* sysdeps/sparc/sparc32/soft-fp/q_feq.c (_Q_feq): Update call to
	FP_CMP_EQ_Q.
	* sysdeps/sparc/sparc32/soft-fp/q_fge.c (_Q_fge): Update call to
	FP_CMP_Q.
	* sysdeps/sparc/sparc32/soft-fp/q_fgt.c (_Q_fgt): Likewise.
	* sysdeps/sparc/sparc32/soft-fp/q_fle.c (_Q_fle): Likewise.
	* sysdeps/sparc/sparc32/soft-fp/q_flt.c (_Q_flt): Likewise.
	* sysdeps/sparc/sparc32/soft-fp/q_fne.c (_Q_fne): Update call to
	FP_CMP_EQ_Q.
	* sysdeps/sparc/sparc64/soft-fp/qp_cmp.c (_Qp_cmp): Update call to
	FP_CMP_Q.
	* sysdeps/sparc/sparc64/soft-fp/qp_cmpe.c (_Qp_cmpe): Likewise.
	* sysdeps/sparc/sparc64/soft-fp/qp_feq.c (_Qp_feq): Update call to
	FP_CMP_EQ_Q.
	* sysdeps/sparc/sparc64/soft-fp/qp_fge.c (_Qp_fge): Update call to
	FP_CMP_Q.
	* sysdeps/sparc/sparc64/soft-fp/qp_fgt.c (_Qp_fgt): Likewise.
	* sysdeps/sparc/sparc64/soft-fp/qp_fle.c (_Qp_fle): Likewise.
	* sysdeps/sparc/sparc64/soft-fp/qp_flt.c (_Qp_flt): Likewise.
	* sysdeps/sparc/sparc64/soft-fp/qp_fne.c (_Qp_fne): Update call to
	FP_CMP_EQ_Q.

1 files changed, 6 insertions, 6 deletions

diff --git a/soft-fp/quad.h b/soft-fp/quad.h
index 16e362f1c6..c2e4133722 100644
--- a/soft-fp/quad.h
+++ b/soft-fp/quad.h
@@ -182,9 +182,9 @@ union _FP_UNION_Q
 # define _FP_SQRT_MEAT_Q(R, S, T, X, Q)	_FP_SQRT_MEAT_4 (R, S, T, X, Q)
 # define FP_FMA_Q(R, X, Y, Z)		_FP_FMA (Q, 4, 8, R, X, Y, Z)
 
-# define FP_CMP_Q(r, X, Y, un)		_FP_CMP (Q, 4, r, X, Y, un)
-# define FP_CMP_EQ_Q(r, X, Y)		_FP_CMP_EQ (Q, 4, r, X, Y)
-# define FP_CMP_UNORD_Q(r, X, Y)	_FP_CMP_UNORD (Q, 4, r, X, Y)
+# define FP_CMP_Q(r, X, Y, un, ex)	_FP_CMP (Q, 4, r, X, Y, un, ex)
+# define FP_CMP_EQ_Q(r, X, Y, ex)	_FP_CMP_EQ (Q, 4, r, X, Y, ex)
+# define FP_CMP_UNORD_Q(r, X, Y, ex)	_FP_CMP_UNORD (Q, 4, r, X, Y, ex)
 
 # define FP_TO_INT_Q(r, X, rsz, rsg)	_FP_TO_INT (Q, 4, r, X, rsz, rsg)
 # define FP_FROM_INT_Q(X, r, rs, rt)	_FP_FROM_INT (Q, 4, X, r, rs, rt)
@@ -306,9 +306,9 @@ union _FP_UNION_Q
 # define _FP_SQRT_MEAT_Q(R, S, T, X, Q)	_FP_SQRT_MEAT_2 (R, S, T, X, Q)
 # define FP_FMA_Q(R, X, Y, Z)		_FP_FMA (Q, 2, 4, R, X, Y, Z)
 
-# define FP_CMP_Q(r, X, Y, un)		_FP_CMP (Q, 2, r, X, Y, un)
-# define FP_CMP_EQ_Q(r, X, Y)		_FP_CMP_EQ (Q, 2, r, X, Y)
-# define FP_CMP_UNORD_Q(r, X, Y)	_FP_CMP_UNORD (Q, 2, r, X, Y)
+# define FP_CMP_Q(r, X, Y, un, ex)	_FP_CMP (Q, 2, r, X, Y, un, ex)
+# define FP_CMP_EQ_Q(r, X, Y, ex)	_FP_CMP_EQ (Q, 2, r, X, Y, ex)
+# define FP_CMP_UNORD_Q(r, X, Y, ex)	_FP_CMP_UNORD (Q, 2, r, X, Y, ex)
 
 # define FP_TO_INT_Q(r, X, rsz, rsg)	_FP_TO_INT (Q, 2, r, X, rsz, rsg)
 # define FP_FROM_INT_Q(X, r, rs, rt)	_FP_FROM_INT (Q, 2, X, r, rs, rt)