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mips.md (*divsf3): Move description of SB-1 F2 erratum from here to... 

2003-10-05  Chris Demetriou  <cgd@broadcom.com>

        * config/mips/mips.md (*divsf3): Move description of
        SB-1 F2 erratum from here to...
        (divsf3): Here.  Disable if TARGET_FIX_SB1 is set and
        flag_unsafe_math_optimizations is not.

From-SVN: r72123
This commit is contained in:
Chris Demetriou 2003-10-05 23:57:56 +00:00 committed by Chris Demetriou
parent c9545f49d3
commit eb33bea0db
2 changed files with 18 additions and 9 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2003-10-05 Chris Demetriou <cgd@broadcom.com>
* config/mips/mips.md (*divsf3): Move description of
SB-1 F2 erratum from here to...
(divsf3): Here. Disable if TARGET_FIX_SB1 is set and
flag_unsafe_math_optimizations is not.
2003-10-05 Aldy Hernandez <aldyh@redhat.com>
* config/rs6000/linuxspe.h: Define TARGET_SPE_ABI, TARGET_SPE,

20
gcc/config/mips/mips.md
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@ -2407,11 +2407,19 @@
(const_int 4)))])
;; This pattern works around the early SB-1 rev2 core "F2" erratum:
;;
;; In certain cases, div.s and div.ps may have a rounding error
;; and/or wrong inexact flag.
;;
;; Therefore, we only allow div.s if not working around SB-1 rev2
;; errata, or if working around those errata and a slight loss of
;; precision is OK (i.e., flag_unsafe_math_optimizations is set).
(define_expand "divsf3"
[(set (match_operand:SF 0 "register_operand" "")
(div:SF (match_operand:SF 1 "reg_or_const_float_1_operand" "")
(match_operand:SF 2 "register_operand" "")))]
"TARGET_HARD_FLOAT"
"TARGET_HARD_FLOAT && (!TARGET_FIX_SB1 || flag_unsafe_math_optimizations)"
{
if (const_float_1_operand (operands[1], SFmode))
if (!(ISA_HAS_FP4 && flag_unsafe_math_optimizations))
@ -2421,14 +2429,8 @@
;; This pattern works around the early SB-1 rev2 core "F1" erratum (see
;; "divdf3" comment for details).
;;
;; This pattern works around the early SB-1 rev2 core "F2" erratum:
;;
;; In certain cases, div.s and div.ps may have a rounding error
;; and/or wrong inexact flag.
;;
;; Therefore, we only allow div.s if not working around SB-1 rev2
;; errata, or if working around those errata and a slight loss of
;; precision is OK (i.e., flag_unsafe_math_optimizations is set).
;; This pattern works around the early SB-1 rev2 core "F2" erratum (see
;; "divsf3" comment for details).
(define_insn "*divsf3"
[(set (match_operand:SF 0 "register_operand" "=f")
(div:SF (match_operand:SF 1 "register_operand" "f")