; Check that madd.[ds], msub.[ds], nmadd.[ds], and nmsub.[ds] are supported
; correctly.
; The spec for nmadd.[ds], and nmsub.[ds] does not state that they obey the
; the Has2008 and ABS2008 configuration bits which govern the conformance to
; IEEE 754 (1985) and IEEE 754 (2008). These instructions are therefore only
; available when -enable-no-nans-fp-math is given.
; RUN: llc < %s -march=mipsel -mcpu=mips32 -enable-no-nans-fp-math | FileCheck %s -check-prefixes=ALL,32-NOMADD
; RUN: llc < %s -march=mipsel -mcpu=mips32r2 -enable-no-nans-fp-math | FileCheck %s -check-prefixes=ALL,32R2,32R2-NONAN
; RUN: llc < %s -march=mipsel -mcpu=mips32r6 -enable-no-nans-fp-math | FileCheck %s -check-prefixes=ALL,32R6-NOMADD
; RUN: llc < %s -march=mips64el -mcpu=mips64 -target-abi=n64 -enable-no-nans-fp-math | FileCheck %s -check-prefixes=ALL,64,64-NONAN
; RUN: llc < %s -march=mips64el -mcpu=mips64r2 -target-abi=n64 -enable-no-nans-fp-math | FileCheck %s -check-prefixes=ALL,64R2,64R2-NONAN
; RUN: llc < %s -march=mips64el -mcpu=mips64r6 -target-abi=n64 -enable-no-nans-fp-math | FileCheck %s -check-prefixes=ALL,64R6-NOMADD
; RUN: llc < %s -march=mipsel -mcpu=mips32 | FileCheck %s -check-prefixes=ALL,32-NOMADD
; RUN: llc < %s -march=mipsel -mcpu=mips32r2 | FileCheck %s -check-prefixes=ALL,32R2,32R2-NAN
; RUN: llc < %s -march=mipsel -mcpu=mips32r6 | FileCheck %s -check-prefixes=ALL,32R6-NOMADD
; RUN: llc < %s -march=mips64el -mcpu=mips64 -target-abi=n64 | FileCheck %s -check-prefixes=ALL,64,64-NAN
; RUN: llc < %s -march=mips64el -mcpu=mips64r2 -target-abi=n64 | FileCheck %s -check-prefixes=ALL,64R2,64R2-NAN
; RUN: llc < %s -march=mips64el -mcpu=mips64r6 -target-abi=n64 | FileCheck %s -check-prefixes=ALL,64R6-NOMADD
; Check that madd.[ds], msub.[ds], nmadd.[ds], and nmsub.[ds] are not generated
; when +nomadd attribute is specified.
; Output for mips32 and mips64r6 reused since aforementioned instructions are
; not generated in those cases.
; RUN: llc < %s -march=mipsel -mcpu=mips32r2 -enable-no-nans-fp-math -mattr=+nomadd4 | FileCheck %s -check-prefixes=ALL,32-NOMADD
; RUN: llc < %s -march=mips64el -mcpu=mips64 -target-abi=n64 -enable-no-nans-fp-math -mattr=+nomadd4 | FileCheck %s -check-prefixes=ALL,64R6-NOMADD
; RUN: llc < %s -march=mips64el -mcpu=mips64r2 -target-abi=n64 -enable-no-nans-fp-math -mattr=+nomadd4 | FileCheck %s -check-prefixes=ALL,64R6-NOMADD
; RUN: llc < %s -march=mipsel -mcpu=mips32r2 -mattr=+nomadd4 | FileCheck %s -check-prefixes=ALL,32-NOMADD
; RUN: llc < %s -march=mips64el -mcpu=mips64 -target-abi=n64 -mattr=+nomadd4 | FileCheck %s -check-prefixes=ALL,64R6-NOMADD
; RUN: llc < %s -march=mips64el -mcpu=mips64r2 -target-abi=n64 -mattr=+nomadd4 | FileCheck %s -check-prefixes=ALL,64R6-NOMADD
define float @FOO0float(float %a, float %b, float %c) nounwind readnone {
entry:
; ALL-LABEL: FOO0float:
; 32-NOMADD-DAG: mtc1 $6, $[[T0:f[0-9]+]]
; 32-NOMADD-DAG: mul.s $[[T1:f[0-9]+]], $f12, $f14
; 32-NOMADD-DAG: add.s $[[T2:f[0-9]+]], $[[T1]], $[[T0]]
; 32-NOMADD-DAG: mtc1 $zero, $[[T2:f[0-9]+]]
; 32-NOMADD-DAG: add.s $f0, $[[T1]], $[[T2]]
; 32R2: mtc1 $6, $[[T0:f[0-9]+]]
; 32R2: madd.s $[[T1:f[0-9]+]], $[[T0]], $f12, $f14
; 32R2: mtc1 $zero, $[[T2:f[0-9]+]]
; 32R2: add.s $f0, $[[T1]], $[[T2]]
; 32R6-NOMADD-DAG: mtc1 $6, $[[T0:f[0-9]+]]
; 32R6-NOMADD-DAG: mul.s $[[T1:f[0-9]+]], $f12, $f14
; 32R6-NOMADD-DAG: add.s $[[T2:f[0-9]+]], $[[T1]], $[[T0]]
; 32R6-NOMADD-DAG: mtc1 $zero, $[[T2:f[0-9]+]]
; 32R6-NOMADD-DAG: add.s $f0, $[[T1]], $[[T2]]
; 64-DAG: madd.s $[[T0:f[0-9]+]], $f14, $f12, $f13
; 64-DAG: mtc1 $zero, $[[T1:f[0-9]+]]
; 64-DAG: add.s $f0, $[[T0]], $[[T1]]
; 64R2: madd.s $[[T0:f[0-9]+]], $f14, $f12, $f13
; 64R2: mtc1 $zero, $[[T1:f[0-9]+]]
; 64R2: add.s $f0, $[[T0]], $[[T1]]
; 64R6-NOMADD-DAG: mul.s $[[T0:f[0-9]+]], $f12, $f13
; 64R6-NOMADD-DAG: add.s $[[T1:f[0-9]+]], $[[T0]], $f14
; 64R6-NOMADD-DAG: mtc1 $zero, $[[T2:f[0-9]+]]
; 64R6-NOMADD-DAG: add.s $f0, $[[T1]], $[[T2]]
%mul = fmul float %a, %b
%add = fadd float %mul, %c
%add1 = fadd float %add, 0.000000e+00
ret float %add1
}
define float @FOO1float(float %a, float %b, float %c) nounwind readnone {
entry:
; ALL-LABEL: FOO1float:
; 32-NOMADD-DAG: mtc1 $6, $[[T0:f[0-9]+]]
; 32-NOMADD-DAG: mul.s $[[T1:f[0-9]+]], $f12, $f14
; 32-NOMADD-DAG: sub.s $[[T2:f[0-9]+]], $[[T1]], $[[T0]]
; 32-NOMADD-DAG: mtc1 $zero, $[[T2:f[0-9]+]]
; 32-NOMADD-DAG: add.s $f0, $[[T1]], $[[T2]]
; 32R2: mtc1 $6, $[[T0:f[0-9]+]]
; 32R2: msub.s $[[T1:f[0-9]+]], $[[T0]], $f12, $f14
; 32R2: mtc1 $zero, $[[T2:f[0-9]+]]
; 32R2: add.s $f0, $[[T1]], $[[T2]]
; 32R6-NOMADD-DAG: mtc1 $6, $[[T0:f[0-9]+]]
; 32R6-NOMADD-DAG: mul.s $[[T1:f[0-9]+]], $f12, $f14
; 32R6-NOMADD-DAG: sub.s $[[T2:f[0-9]+]], $[[T1]], $[[T0]]
; 32R6-NOMADD-DAG: mtc1 $zero, $[[T2:f[0-9]+]]
; 32R6-NOMADD-DAG: add.s $f0, $[[T1]], $[[T2]]
; 64-DAG: msub.s $[[T0:f[0-9]+]], $f14, $f12, $f13
; 64-DAG: mtc1 $zero, $[[T1:f[0-9]+]]
; 64-DAG: add.s $f0, $[[T0]], $[[T1]]
; 64R2: msub.s $[[T0:f[0-9]+]], $f14, $f12, $f13
; 64R2: mtc1 $zero, $[[T1:f[0-9]+]]
; 64R2: add.s $f0, $[[T0]], $[[T1]]
; 64R6-NOMADD-DAG: mul.s $[[T0:f[0-9]+]], $f12, $f13
; 64R6-NOMADD-DAG: sub.s $[[T1:f[0-9]+]], $[[T0]], $f14
; 64R6-NOMADD-DAG: mtc1 $zero, $[[T2:f[0-9]+]]
; 64R6-NOMADD-DAG: add.s $f0, $[[T1]], $[[T2]]
%mul = fmul float %a, %b
%sub = fsub float %mul, %c
%add = fadd float %sub, 0.000000e+00
ret float %add
}
define float @FOO2float(float %a, float %b, float %c) nounwind readnone {
entry:
; ALL-LABEL: FOO2float:
; 32-NOMADD-DAG: mtc1 $6, $[[T0:f[0-9]+]]
; 32-NOMADD-DAG: mul.s $[[T1:f[0-9]+]], $f12, $f14
; 32-NOMADD-DAG: add.s $[[T2:f[0-9]+]], $[[T1]], $[[T0]]
; 32-NOMADD-DAG: mtc1 $zero, $[[T2:f[0-9]+]]
; 32-NOMADD-DAG: sub.s $f0, $[[T2]], $[[T1]]
; 32R2-NONAN: mtc1 $6, $[[T0:f[0-9]+]]
; 32R2-NONAN: nmadd.s $f0, $[[T0]], $f12, $f14
; 32R2-NAN: mtc1 $6, $[[T0:f[0-9]+]]
; 32R2-NAN: madd.s $[[T1:f[0-9]+]], $[[T0]], $f12, $f14
; 32R2-NAN: mtc1 $zero, $[[T2:f[0-9]+]]
; 32R2-NAN: sub.s $f0, $[[T2]], $[[T1]]
; 32R6-NOMADD-DAG: mtc1 $6, $[[T0:f[0-9]+]]
; 32R6-NOMADD-DAG: mul.s $[[T1:f[0-9]+]], $f12, $f14
; 32R6-NOMADD-DAG: add.s $[[T2:f[0-9]+]], $[[T1]], $[[T0]]
; 32R6-NOMADD-DAG: mtc1 $zero, $[[T2:f[0-9]+]]
; 32R6-NOMADD-DAG: sub.s $f0, $[[T2]], $[[T1]]
; 64-NONAN: nmadd.s $f0, $f14, $f12, $f13
; 64-NAN: madd.s $[[T0:f[0-9]+]], $f14, $f12, $f13
; 64-NAN: mtc1 $zero, $[[T1:f[0-9]+]]
; 64-NAN: sub.s $f0, $[[T1]], $[[T0]]
; 64R2-NONAN: nmadd.s $f0, $f14, $f12, $f13
; 64R2-NAN: madd.s $[[T0:f[0-9]+]], $f14, $f12, $f13
; 64R2-NAN: mtc1 $zero, $[[T1:f[0-9]+]]
; 64R2-NAN: sub.s $f0, $[[T1]], $[[T0]]
; 64R6-NOMADD-DAG: mul.s $[[T1:f[0-9]+]], $f12, $f13
; 64R6-NOMADD-DAG: add.s $[[T2:f[0-9]+]], $[[T1]], $f14
; 64R6-NOMADD-DAG: mtc1 $zero, $[[T2:f[0-9]+]]
; 64R6-NOMADD-DAG: sub.s $f0, $[[T2]], $[[T1]]
%mul = fmul float %a, %b
%add = fadd float %mul, %c
%sub = fsub float 0.000000e+00, %add
ret float %sub
}
define float @FOO3float(float %a, float %b, float %c) nounwind readnone {
entry:
; ALL-LABEL: FOO3float:
; 32-NOMADD-DAG: mtc1 $6, $[[T0:f[0-9]+]]
; 32-NOMADD-DAG: mul.s $[[T1:f[0-9]+]], $f12, $f14
; 32-NOMADD-DAG: sub.s $[[T2:f[0-9]+]], $[[T1]], $[[T0]]
; 32-NOMADD-DAG: mtc1 $zero, $[[T2:f[0-9]+]]
; 32-NOMADD-DAG: sub.s $f0, $[[T2]], $[[T1]]
; 32R2-NONAN: mtc1 $6, $[[T0:f[0-9]+]]
; 32R2-NONAN: nmsub.s $f0, $[[T0]], $f12, $f14
; 32R2-NAN: mtc1 $6, $[[T0:f[0-9]+]]
; 32R2-NAN: msub.s $[[T1:f[0-9]+]], $[[T0]], $f12, $f14
; 32R2-NAN: mtc1 $zero, $[[T2:f[0-9]+]]
; 32R2-NAN: sub.s $f0, $[[T2]], $[[T1]]
; 64-NAN: msub.s $[[T0:f[0-9]+]], $f14, $f12, $f13
; 64-NAN: mtc1 $zero, $[[T1:f[0-9]+]]
; 64-NAN: sub.s $f0, $[[T1]], $[[T0]]
; 64-NONAN: nmsub.s $f0, $f14, $f12, $f13
; 64R2-NAN: msub.s $[[T0:f[0-9]+]], $f14, $f12, $f13
; 64R2-NAN: mtc1 $zero, $[[T1:f[0-9]+]]
; 64R2-NAN: sub.s $f0, $[[T1]], $[[T0]]
; 64R6-NOMADD-DAG: mul.s $[[T1:f[0-9]+]], $f12, $f13
; 64R6-NOMADD-DAG: sub.s $[[T2:f[0-9]+]], $[[T1]], $f14
; 64R6-NOMADD-DAG: mtc1 $zero, $[[T2:f[0-9]+]]
; 64R6-NOMADD-DAG: sub.s $f0, $[[T2]], $[[T1]]
%mul = fmul float %a, %b
%sub = fsub float %mul, %c
%sub1 = fsub float 0.000000e+00, %sub
ret float %sub1
}
define double @FOO10double(double %a, double %b, double %c) nounwind readnone {
entry:
; ALL-LABEL: FOO10double:
; 32-NOMADD-DAG: ldc1 $[[T0:f[0-9]+]], 16($sp)
; 32-NOMADD-DAG: mul.d $[[T1:f[0-9]+]], $f12, $f14
; 32-NOMADD-DAG: add.d $[[T2:f[0-9]+]], $[[T1]], $[[T0]]
; 32-NOMADD-DAG: mtc1 $zero, $[[T2:f[0-9]+]]
; 32-NOMADD-DAG: add.d $f0, $[[T1]], $[[T2]]
; 32R2: ldc1 $[[T0:f[0-9]+]], 16($sp)
; 32R2: madd.d $[[T1:f[0-9]+]], $[[T0]], $f12, $f14
; 32R2: mtc1 $zero, $[[T2:f[0-9]+]]
; 32R2: mthc1 $zero, $[[T2]]
; 32R2: add.d $f0, $[[T1]], $[[T2]]
; 32R6-NOMADD-DAG: ldc1 $[[T0:f[0-9]+]], 16($sp)
; 32R6-NOMADD-DAG: mul.d $[[T1:f[0-9]+]], $f12, $f14
; 32R6-NOMADD-DAG: add.d $[[T2:f[0-9]+]], $[[T1]], $[[T0]]
; 32R6-NOMADD-DAG: mtc1 $zero, $[[T2:f[0-9]+]]
; 32R6-NOMADD-DAG: add.d $f0, $[[T1]], $[[T2]]
; 64-DAG: madd.d $[[T0:f[0-9]+]], $f14, $f12, $f13
; 64-DAG: mtc1 $zero, $[[T1:f[0-9]+]]
; 64-DAG: add.d $f0, $[[T0]], $[[T1]]
; 64R2: madd.d $[[T0:f[0-9]+]], $f14, $f12, $f13
; 64R2: mtc1 $zero, $[[T1:f[0-9]+]]
; 64R2: add.d $f0, $[[T0]], $[[T1]]
; 64R6-NOMADD-DAG: mul.d $[[T1:f[0-9]+]], $f12, $f13
; 64R6-NOMADD-DAG: add.d $[[T2:f[0-9]+]], $[[T1]], $f14
; 64R6-NOMADD-DAG: dmtc1 $zero, $[[T2:f[0-9]+]]
; 64R6-NOMADD-DAG: add.d $f0, $[[T1]], $[[T2]]
%mul = fmul double %a, %b
%add = fadd double %mul, %c
%add1 = fadd double %add, 0.000000e+00
ret double %add1
}
define double @FOO11double(double %a, double %b, double %c) nounwind readnone {
entry:
; ALL-LABEL: FOO11double:
; 32-NOMADD-DAG: ldc1 $[[T0:f[0-9]+]], 16($sp)
; 32-NOMADD-DAG: mul.d $[[T1:f[0-9]+]], $f12, $f14
; 32-NOMADD-DAG: sub.d $[[T2:f[0-9]+]], $[[T1]], $[[T0]]
; 32-NOMADD-DAG: mtc1 $zero, $[[T2:f[0-9]+]]
; 32-NOMADD-DAG: add.d $f0, $[[T1]], $[[T2]]
; 32R2: ldc1 $[[T0:f[0-9]+]], 16($sp)
; 32R2: msub.d $[[T1:f[0-9]+]], $[[T0]], $f12, $f14
; 32R2: mtc1 $zero, $[[T2:f[0-9]+]]
; 32R2: mthc1 $zero, $[[T2]]
; 32R2: add.d $f0, $[[T1]], $[[T2]]
; 32R6-NOMADD-DAG: ldc1 $[[T0:f[0-9]+]], 16($sp)
; 32R6-NOMADD-DAG: mul.d $[[T1:f[0-9]+]], $f12, $f14
; 32R6-NOMADD-DAG: sub.d $[[T2:f[0-9]+]], $[[T1]], $[[T0]]
; 32R6-NOMADD-DAG: mtc1 $zero, $[[T2:f[0-9]+]]
; 32R6-NOMADD-DAG: add.d $f0, $[[T1]], $[[T2]]
; 64-DAG: msub.d $[[T0:f[0-9]+]], $f14, $f12, $f13
; 64-DAG: mtc1 $zero, $[[T1:f[0-9]+]]
; 64-DAG: add.d $f0, $[[T0]], $[[T1]]
; 64R2: msub.d $[[T0:f[0-9]+]], $f14, $f12, $f13
; 64R2: mtc1 $zero, $[[T1:f[0-9]+]]
; 64R2: add.d $f0, $[[T0]], $[[T1]]
; 64R6-NOMADD-DAG: mul.d $[[T1:f[0-9]+]], $f12, $f13
; 64R6-NOMADD-DAG: sub.d $[[T2:f[0-9]+]], $[[T1]], $f14
; 64R6-NOMADD-DAG: dmtc1 $zero, $[[T2:f[0-9]+]]
; 64R6-NOMADD-DAG: add.d $f0, $[[T1]], $[[T2]]
%mul = fmul double %a, %b
%sub = fsub double %mul, %c
%add = fadd double %sub, 0.000000e+00
ret double %add
}
define double @FOO12double(double %a, double %b, double %c) nounwind readnone {
entry:
; ALL-LABEL: FOO12double:
; 32-NOMADD-DAG: ldc1 $[[T0:f[0-9]+]], 16($sp)
; 32-NOMADD-DAG: mul.d $[[T1:f[0-9]+]], $f12, $f14
; 32-NOMADD-DAG: add.d $[[T2:f[0-9]+]], $[[T1]], $[[T0]]
; 32-NOMADD-DAG: mtc1 $zero, $[[T2:f[0-9]+]]
; 32-NOMADD-DAG: sub.d $f0, $[[T2]], $[[T1]]
; 32R2-NONAN: ldc1 $[[T0:f[0-9]+]], 16($sp)
; 32R2-NONAN: nmadd.d $f0, $[[T0]], $f12, $f14
; 32R2-NAN: ldc1 $[[T0:f[0-9]+]], 16($sp)
; 32R2-NAN: madd.d $[[T1:f[0-9]+]], $[[T0]], $f12, $f14
; 32R2-NAN: mtc1 $zero, $[[T2:f[0-9]+]]
; 32R2-NAN: mthc1 $zero, $[[T2]]
; 32R2-NAN: sub.d $f0, $[[T2]], $[[T1]]
; 32R6-NOMADD-DAG: ldc1 $[[T0:f[0-9]+]], 16($sp)
; 32R6-NOMADD-DAG: mul.d $[[T1:f[0-9]+]], $f12, $f14
; 32R6-NOMADD-DAG: add.d $[[T2:f[0-9]+]], $[[T1]], $[[T0]]
; 32R6-NOMADD-DAG: mtc1 $zero, $[[T2:f[0-9]+]]
; 32R6-NOMADD-DAG: sub.d $f0, $[[T2]], $[[T1]]
; 64-NONAN: nmadd.d $f0, $f14, $f12, $f13
; 64-NAN: madd.d $[[T0:f[0-9]+]], $f14, $f12, $f13
; 64-NAN: mtc1 $zero, $[[T1:f[0-9]+]]
; 64-NAN: sub.d $f0, $[[T1]], $[[T0]]
; 64R2-NONAN: nmadd.d $f0, $f14, $f12, $f13
; 64R2-NAN: madd.d $[[T0:f[0-9]+]], $f14, $f12, $f13
; 64R2-NAN: mtc1 $zero, $[[T1:f[0-9]+]]
; 64R2-NAN: sub.d $f0, $[[T1]], $[[T0]]
; 64R6-NOMADD-DAG: mul.d $[[T1:f[0-9]+]], $f12, $f13
; 64R6-NOMADD-DAG: add.d $[[T2:f[0-9]+]], $[[T1]], $f14
; 64R6-NOMADD-DAG: dmtc1 $zero, $[[T2:f[0-9]+]]
; 64R6-NOMADD-DAG: sub.d $f0, $[[T2]], $[[T1]]
%mul = fmul double %a, %b
%add = fadd double %mul, %c
%sub = fsub double 0.000000e+00, %add
ret double %sub
}
define double @FOO13double(double %a, double %b, double %c) nounwind readnone {
entry:
; ALL-LABEL: FOO13double:
; 32-NOMADD-DAG: ldc1 $[[T0:f[0-9]+]], 16($sp)
; 32-NOMADD-DAG: mul.d $[[T1:f[0-9]+]], $f12, $f14
; 32-NOMADD-DAG: sub.d $[[T2:f[0-9]+]], $[[T1]], $[[T0]]
; 32-NOMADD-DAG: mtc1 $zero, $[[T2:f[0-9]+]]
; 32-NOMADD-DAG: sub.d $f0, $[[T2]], $[[T1]]
; 32R2-NONAN: ldc1 $[[T0:f[0-9]+]], 16($sp)
; 32R2-NONAN: nmsub.d $f0, $[[T0]], $f12, $f14
; 32R2-NAN: ldc1 $[[T0:f[0-9]+]], 16($sp)
; 32R2-NAN: msub.d $[[T1:f[0-9]+]], $[[T0]], $f12, $f14
; 32R2-NAN: mtc1 $zero, $[[T2:f[0-9]+]]
; 32R2-NAN: mthc1 $zero, $[[T2]]
; 32R2-NAN: sub.d $f0, $[[T2]], $[[T1]]
; 32R6-NOMADD-DAG: ldc1 $[[T0:f[0-9]+]], 16($sp)
; 32R6-NOMADD-DAG: mul.d $[[T1:f[0-9]+]], $f12, $f14
; 32R6-NOMADD-DAG: sub.d $[[T2:f[0-9]+]], $[[T1]], $[[T0]]
; 32R6-NOMADD-DAG: mtc1 $zero, $[[T2:f[0-9]+]]
; 32R6-NOMADD-DAG: sub.d $f0, $[[T2]], $[[T1]]
; 64-NONAN: nmsub.d $f0, $f14, $f12, $f13
; 64-NAN: msub.d $[[T0:f[0-9]+]], $f14, $f12, $f13
; 64-NAN: mtc1 $zero, $[[T1:f[0-9]+]]
; 64-NAN: sub.d $f0, $[[T1]], $[[T0]]
; 64R2-NONAN: nmsub.d $f0, $f14, $f12, $f13
; 64R2-NAN: msub.d $[[T0:f[0-9]+]], $f14, $f12, $f13
; 64R2-NAN: mtc1 $zero, $[[T1:f[0-9]+]]
; 64R2-NAN: sub.d $f0, $[[T1]], $[[T0]]
; 64R6-NOMADD-DAG: mul.d $[[T1:f[0-9]+]], $f12, $f13
; 64R6-NOMADD-DAG: sub.d $[[T2:f[0-9]+]], $[[T1]], $f14
; 64R6-NOMADD-DAG: dmtc1 $zero, $[[T2:f[0-9]+]]
; 64R6-NOMADD-DAG: sub.d $f0, $[[T2]], $[[T1]]
%mul = fmul double %a, %b
%sub = fsub double %mul, %c
%sub1 = fsub double 0.000000e+00, %sub
ret double %sub1
}