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LFS/STFS load and store FP values, not integer ones. This change allows us

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to codegen this: float foo() { return 1.245; }

into this:

_foo:
        lis r2, ha16(.CPI_foo_0)
        lfs f1, lo16(.CPI_foo_0)(r2)
        blr

instead of this:

_foo:
        lis r2, ha16(.CPI_foo_0)
        lfs r2, lo16(.CPI_foo_0)(r2)   <-- ouch
        or f1, r2, r2                  <-- ouch
        blr

with the dag isel.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23033 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-08-25 00:26:22 +00:00
parent ed7956bfe4
commit fdf8366ecc
1 changed files with 4 additions and 4 deletions
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8
lib/Target/PowerPC/PPCInstrInfo.td
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@ -179,15 +179,15 @@ def CMPLWI : DForm_6_ext<10, (ops CRRC:$dst, GPRC:$src1, u16imm:$src2),
def CMPLDI : DForm_6_ext<10, (ops CRRC:$dst, GPRC:$src1, u16imm:$src2),
"cmpldi $dst, $src1, $src2">, isPPC64;
let isLoad = 1 in {
def LFS : DForm_8<48, (ops GPRC:$rD, symbolLo:$disp, GPRC:$rA),
def LFS : DForm_8<48, (ops FPRC:$rD, symbolLo:$disp, GPRC:$rA),
"lfs $rD, $disp($rA)">;
def LFD : DForm_8<50, (ops GPRC:$rD, symbolLo:$disp, GPRC:$rA),
def LFD : DForm_8<50, (ops FPRC:$rD, symbolLo:$disp, GPRC:$rA),
"lfd $rD, $disp($rA)">;
}
let isStore = 1 in {
def STFS : DForm_9<52, (ops GPRC:$rS, symbolLo:$disp, GPRC:$rA),
def STFS : DForm_9<52, (ops FPRC:$rS, symbolLo:$disp, GPRC:$rA),
"stfs $rS, $disp($rA)">;
def STFD : DForm_9<54, (ops GPRC:$rS, symbolLo:$disp, GPRC:$rA),
def STFD : DForm_9<54, (ops FPRC:$rS, symbolLo:$disp, GPRC:$rA),
"stfd $rS, $disp($rA)">;
}