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Re: MIPS PATCH: additional mips16 hard float library support
- From: Sandra Loosemore <sandra at codesourcery dot com>
- To: GCC Patches <gcc-patches at gcc dot gnu dot org>, richard at codesourcery dot com
- Date: Wed, 01 Aug 2007 12:30:03 -0400
- Subject: Re: MIPS PATCH: additional mips16 hard float library support
- References: <46AFF221.3060100@codesourcery.com> <87ps27g713.fsf@firetop.home>
Richard Sandiford wrote:
Sandra Loosemore <sandra@codesourcery.com> writes:
This patch adds mips16 library support for unordered float/double
comparisons and conversions to float/double from unsigned.
In case anyone's wondering, this library support is just an optimisation
rather than new functionality. The default libgcc implementation is far
less efficient, since it uses mips16 calls to non-mips16 hard-float
functions.
Yes, sorry for not making that more clear. :-P
OK, thanks.
I had to tweak the patch a bit for the recent MIPS makefile changes. Here's the
final version I committed.
-Sandra
2007-08-01 Sandra Loosemore <sandra@codesourcery.com>
David Ung <davidu@mips.com>
gcc/
* config/mips/mips16.S (__mips16_unordsf2, __mips16_floatunsisf): New.
(__mips16_unorddf2, __mips16_floatunsidf): New.
* config/mips/mips.c (mips_init_libfuncs): Add optab entries for
above functions.
* config/mips/t-libgcc-mips16 (LIB1ASMFUNCS): Add new functions.
Index: gcc/config/mips/t-libgcc-mips16
===================================================================
*** gcc/config/mips/t-libgcc-mips16 (revision 127126)
--- gcc/config/mips/t-libgcc-mips16 (working copy)
***************
*** 1,11 ****
LIB1ASMSRC = mips/mips16.S
LIB1ASMFUNCS = _m16addsf3 _m16subsf3 _m16mulsf3 _m16divsf3 \
_m16eqsf2 _m16nesf2 _m16gtsf2 _m16gesf2 _m16lesf2 _m16ltsf2 \
! _m16fltsisf _m16fix_truncsfsi \
_m16adddf3 _m16subdf3 _m16muldf3 _m16divdf3 \
_m16extsfdf2 _m16trdfsf2 \
_m16eqdf2 _m16nedf2 _m16gtdf2 _m16gedf2 _m16ledf2 _m16ltdf2 \
! _m16fltsidf _m16fix_truncdfsi \
_m16retsf _m16retdf \
_m16retsc _m16retdc \
_m16stub1 _m16stub2 _m16stub5 _m16stub6 _m16stub9 _m16stub10 \
--- 1,13 ----
LIB1ASMSRC = mips/mips16.S
LIB1ASMFUNCS = _m16addsf3 _m16subsf3 _m16mulsf3 _m16divsf3 \
_m16eqsf2 _m16nesf2 _m16gtsf2 _m16gesf2 _m16lesf2 _m16ltsf2 \
! _m16unordsf2 \
! _m16fltsisf _m16fix_truncsfsi _m16fltunsisf \
_m16adddf3 _m16subdf3 _m16muldf3 _m16divdf3 \
_m16extsfdf2 _m16trdfsf2 \
_m16eqdf2 _m16nedf2 _m16gtdf2 _m16gedf2 _m16ledf2 _m16ltdf2 \
! _m16unorddf2 \
! _m16fltsidf _m16fix_truncdfsi _m16fltunsidf \
_m16retsf _m16retdf \
_m16retsc _m16retdc \
_m16stub1 _m16stub2 _m16stub5 _m16stub6 _m16stub9 _m16stub10 \
Index: gcc/config/mips/mips16.S
===================================================================
*** gcc/config/mips/mips16.S (revision 127126)
--- gcc/config/mips/mips16.S (working copy)
*************** CMPSF (__mips16_lesf2, c.le.s, 0, 1)
*** 286,291 ****
--- 286,295 ----
#ifdef L_m16ltsf2
CMPSF (__mips16_ltsf2, c.lt.s, -1, 0)
#endif
+ #ifdef L_m16unordsf2
+ CMPSF(__mips16_unordsf2, c.un.s, 1, 0)
+ #endif
+
/* Single-precision conversions. */
*************** STARTFN (__mips16_floatsisf)
*** 297,302 ****
--- 301,321 ----
ENDFN (__mips16_floatsisf)
#endif
+ #ifdef L_m16fltunsisf
+ STARTFN (__mips16_floatunsisf)
+ bltz $4,1f
+ j __mips16_floatsisf
+ 1:
+ and $2,$4,1
+ srl $3,$4,1
+ or $2,$2,$3
+ mtc1 $2,RET
+ cvt.s.w RET,RET
+ add.s RET,RET,RET
+ MOVE_SF_RET (f, $31)
+ ENDFN (__mips16_floatunsisf)
+ #endif
+
#ifdef L_m16fix_truncsfsi
STARTFN (__mips16_fix_truncsfsi)
MOVE_SF_BYTE0 (t)
*************** CMPDF (__mips16_ledf2, c.le.d, 0, 1)
*** 420,425 ****
--- 439,447 ----
#ifdef L_m16ltdf2
CMPDF (__mips16_ltdf2, c.lt.d, -1, 0)
#endif
+ #ifdef L_m16unorddf2
+ CMPDF(__mips16_unorddf2, c.un.d, 1, 0)
+ #endif
/* Double-precision conversions. */
*************** STARTFN (__mips16_floatsidf)
*** 430,436 ****
MOVE_DF_RET (f, $31)
ENDFN (__mips16_floatsidf)
#endif
!
#ifdef L_m16fix_truncdfsi
STARTFN (__mips16_fix_truncdfsi)
MOVE_DF_BYTE0 (t)
--- 452,469 ----
MOVE_DF_RET (f, $31)
ENDFN (__mips16_floatsidf)
#endif
!
! #ifdef L_m16fltunsidf
! STARTFN (__mips16_floatunsidf)
! MOVE_SI_BYTE0 (t)
! cvt.d.w RET,ARG1
! bgez $4,1f
! li.d ARG1, 4.294967296e+9
! add.d RET, RET, ARG1
! 1: MOVE_DF_RET (f, $31)
! ENDFN (__mips16_floatunsidf)
! #endif
!
#ifdef L_m16fix_truncdfsi
STARTFN (__mips16_fix_truncdfsi)
MOVE_DF_BYTE0 (t)
Index: gcc/config/mips/mips.c
===================================================================
*** gcc/config/mips/mips.c (revision 127126)
--- gcc/config/mips/mips.c (working copy)
*************** mips_init_libfuncs (void)
*** 10115,10123 ****
--- 10115,10125 ----
set_optab_libfunc (ge_optab, SFmode, "__mips16_gesf2");
set_optab_libfunc (lt_optab, SFmode, "__mips16_ltsf2");
set_optab_libfunc (le_optab, SFmode, "__mips16_lesf2");
+ set_optab_libfunc (unord_optab, SFmode, "__mips16_unordsf2");
set_conv_libfunc (sfix_optab, SImode, SFmode, "__mips16_fix_truncsfsi");
set_conv_libfunc (sfloat_optab, SFmode, SImode, "__mips16_floatsisf");
+ set_conv_libfunc (ufloat_optab, SFmode, SImode, "__mips16_floatunsisf");
if (TARGET_DOUBLE_FLOAT)
{
*************** mips_init_libfuncs (void)
*** 10132,10143 ****
--- 10134,10147 ----
set_optab_libfunc (ge_optab, DFmode, "__mips16_gedf2");
set_optab_libfunc (lt_optab, DFmode, "__mips16_ltdf2");
set_optab_libfunc (le_optab, DFmode, "__mips16_ledf2");
+ set_optab_libfunc (unord_optab, DFmode, "__mips16_unorddf2");
set_conv_libfunc (sext_optab, DFmode, SFmode, "__mips16_extendsfdf2");
set_conv_libfunc (trunc_optab, SFmode, DFmode, "__mips16_truncdfsf2");
set_conv_libfunc (sfix_optab, SImode, DFmode, "__mips16_fix_truncdfsi");
set_conv_libfunc (sfloat_optab, DFmode, SImode, "__mips16_floatsidf");
+ set_conv_libfunc (ufloat_optab, DFmode, SImode, "__mips16_floatunsidf");
}
}
else