[Bug target/65614] [5 Regression] PowerPC VSX systems should use XSCPSGNDP to copy scalar fp data to/from Altivec registers

[meissner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65614

--- Comment #6 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Tue Apr  7 03:36:05 2015
New Revision: 221888

URL: https://gcc.gnu.org/viewcvs?rev=221888&root=gcc&view=rev
Log:
[gcc]
2015-04-06  Michael Meissner  <meiss...@linux.vnet.ibm.com>

    PR target/65614
    * config/rs6000/rs6000.c (struct processor_costs): Add cost field
    for SF->DF conversions to make FLOAT_EXTEND more expensive, so
    that LFD is used to load double constants instead of LFS.  Add
    defaults for all costs structures.  Add comments for missing
    initialization fields.
    (size32_cost): Likewise.
    (size64_cost): Likewise.
    (rs64a_cost): Likewise.
    (mpccore_cost): Likewise.
    (ppc403_cost): Likewise.
    (ppc405_cost): Likewise.
    (ppc440_cost): Likewise.
    (ppc476_cost): Likewise.
    (ppc601_cost): Likewise.
    (ppc603_cost): Likewise.
    (ppc604_cost): Likewise.
    (ppc604e_cost): Likewise.
    (ppc620_cost): Likewise.
    (ppc630_cost): Likewise.
    (ppccell_cost): Likewise.
    (ppc750_cost): Likewise.
    (ppc7450_cost): Likewise.
    (ppc8540_cost): Likewise.
    (ppce300c2c3_cost): Likewise.
    (ppce500mc_cost): Likewise.
    (ppce500mc64_cost): Likewise.
    (ppce5500_cost): Likewise.
    (ppce6500_cost): Likewise.
    (titan_cost): Likewise.
    (power4_cost): Likewise.
    (power6_cost): Likewise.
    (power7_cost): Likewise.
    (power8_cost): Likewise.
    (ppca2_cost): Likewise.
    (rs6000_rtx_costs): Make FLOAT_EXTEND use SFDF_convert field.

    * config/rs6000/rs6000.md (extendsfdf2_fpr): Generate XSCPSGNDP
    instead of XXLOR to copy SFmode to clear out dirty bits created
    when SFmode denormals are generated.
    (mov<mode>_hardfloat, FMOVE32 case): Likewise.
    (truncdfsf2_fpr): Add support for ISA 2.07 XSRSP instruction.

[gcc/testsuite]
2015-04-06  Michael Meissner  <meiss...@linux.vnet.ibm.com>

    PR target/65614
    * gcc.target/powerpc/compress-float-ppc-pic.c: Run test on power5
    to get floating point compression.
    * gcc.target/powerpc/compress-foat-ppc.c: Likewise.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/rs6000/rs6000.c
    trunk/gcc/config/rs6000/rs6000.md
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.target/powerpc/compress-float-ppc-pic.c
    trunk/gcc/testsuite/gcc.target/powerpc/compress-float-ppc.c