; Test that the FP64A ABI performs double precision moves via a spill/reload.
; The requirement is really that odd-numbered double precision registers do not
; use mfc1/mtc1 to move the bottom 32-bits (because the hardware will redirect
; this to the top 32-bits of the even register) but we have to make the decision
; before register allocation so we do this for all double-precision values.
; We don't test MIPS32r1 since support for 64-bit coprocessors (such as a 64-bit
; FPU) on a 32-bit architecture was added in MIPS32r2.
; FIXME: We currently don't test that attempting to use FP64 on MIPS32r1 is an
; error either. This is because a large number of CodeGen tests are
; incorrectly using this case. We should fix those test cases then add
; this check here.
; RUN: llc -march=mips -mcpu=mips32r2 -mattr=fp64 < %s | FileCheck %s -check-prefixes=ALL,32R2-NO-FP64A-BE
; RUN: llc -march=mips -mcpu=mips32r2 -mattr=fp64,nooddspreg < %s | FileCheck %s -check-prefixes=ALL,32R2-FP64A
; RUN: llc -march=mipsel -mcpu=mips32r2 -mattr=fp64 < %s | FileCheck %s -check-prefixes=ALL,32R2-NO-FP64A-LE
; RUN: llc -march=mipsel -mcpu=mips32r2 -mattr=fp64,nooddspreg < %s | FileCheck %s -check-prefixes=ALL,32R2-FP64A
; RUN: llc -march=mips64 -mcpu=mips64 -mattr=fp64 < %s | FileCheck %s -check-prefixes=ALL,64-NO-FP64A
; RUN: not llc -march=mips64 -mcpu=mips64 -mattr=fp64,nooddspreg < %s 2>&1 | FileCheck %s -check-prefix=64-FP64A
; RUN: llc -march=mips64el -mcpu=mips64 -mattr=fp64 < %s | FileCheck %s -check-prefixes=ALL,64-NO-FP64A
; RUN: not llc -march=mips64el -mcpu=mips64 -mattr=fp64,nooddspreg < %s 2>&1 | FileCheck %s -check-prefix=64-FP64A
; 64-FP64A: LLVM ERROR: -mattr=+nooddspreg requires the O32 ABI.
declare double @dbl();
define double @call1(double %d, ...) {
ret double %d
; ALL-LABEL: call1:
; 32R2-NO-FP64A-LE-NOT: addiu $sp, $sp
; 32R2-NO-FP64A-LE: mtc1 $4, $f0
; 32R2-NO-FP64A-LE: mthc1 $5, $f0
; 32R2-NO-FP64A-BE-NOT: addiu $sp, $sp
; 32R2-NO-FP64A-BE: mtc1 $5, $f0
; 32R2-NO-FP64A-BE: mthc1 $4, $f0
; 32R2-FP64A: addiu $sp, $sp, -8
; 32R2-FP64A: sw $4, 0($sp)
; 32R2-FP64A: sw $5, 4($sp)
; 32R2-FP64A: ldc1 $f0, 0($sp)
; 64-NO-FP64A: daddiu $sp, $sp, -64
; 64-NO-FP64A: mov.d $f0, $f12
}
define double @call2(i32 %i, double %d) {
ret double %d
; ALL-LABEL: call2:
; 32R2-NO-FP64A-LE: mtc1 $6, $f0
; 32R2-NO-FP64A-LE: mthc1 $7, $f0
; 32R2-NO-FP64A-BE: mtc1 $7, $f0
; 32R2-NO-FP64A-BE: mthc1 $6, $f0
; 32R2-FP64A: addiu $sp, $sp, -8
; 32R2-FP64A: sw $6, 0($sp)
; 32R2-FP64A: sw $7, 4($sp)
; 32R2-FP64A: ldc1 $f0, 0($sp)
; 64-NO-FP64A-NOT: daddiu $sp, $sp
; 64-NO-FP64A: mov.d $f0, $f13
}
define double @call3(float %f1, float %f2, double %d) {
ret double %d
; ALL-LABEL: call3:
; 32R2-NO-FP64A-LE: mtc1 $6, $f0
; 32R2-NO-FP64A-LE: mthc1 $7, $f0
; 32R2-NO-FP64A-BE: mtc1 $7, $f0
; 32R2-NO-FP64A-BE: mthc1 $6, $f0
; 32R2-FP64A: addiu $sp, $sp, -8
; 32R2-FP64A: sw $6, 0($sp)
; 32R2-FP64A: sw $7, 4($sp)
; 32R2-FP64A: ldc1 $f0, 0($sp)
; 64-NO-FP64A-NOT: daddiu $sp, $sp
; 64-NO-FP64A: mov.d $f0, $f14
}
define double @call4(float %f, double %d, ...) {
ret double %d
; ALL-LABEL: call4:
; 32R2-NO-FP64A-LE: mtc1 $6, $f0
; 32R2-NO-FP64A-LE: mthc1 $7, $f0
; 32R2-NO-FP64A-BE: mtc1 $7, $f0
; 32R2-NO-FP64A-BE: mthc1 $6, $f0
; 32R2-FP64A: addiu $sp, $sp, -8
; 32R2-FP64A: sw $6, 0($sp)
; 32R2-FP64A: sw $7, 4($sp)
; 32R2-FP64A: ldc1 $f0, 0($sp)
; 64-NO-FP64A: daddiu $sp, $sp, -48
; 64-NO-FP64A: mov.d $f0, $f13
}
define double @call5(double %a, double %b, ...) {
%1 = fsub double %a, %b
ret double %1
; ALL-LABEL: call5:
; 32R2-NO-FP64A-LE-DAG: mtc1 $4, $[[T0:f[0-9]+]]
; 32R2-NO-FP64A-LE-DAG: mthc1 $5, $[[T0:f[0-9]+]]
; 32R2-NO-FP64A-LE-DAG: mtc1 $6, $[[T1:f[0-9]+]]
; 32R2-NO-FP64A-LE-DAG: mthc1 $7, $[[T1:f[0-9]+]]
; 32R2-NO-FP64A-LE: sub.d $f0, $[[T0]], $[[T1]]
; 32R2-NO-FP64A-BE-DAG: mtc1 $5, $[[T0:f[0-9]+]]
; 32R2-NO-FP64A-BE-DAG: mthc1 $4, $[[T0:f[0-9]+]]
; 32R2-NO-FP64A-BE-DAG: mtc1 $7, $[[T1:f[0-9]+]]
; 32R2-NO-FP64A-BE-DAG: mthc1 $6, $[[T1:f[0-9]+]]
; 32R2-NO-FP64A-BE: sub.d $f0, $[[T0]], $[[T1]]
; 32R2-FP64A: addiu $sp, $sp, -8
; 32R2-FP64A: sw $6, 0($sp)
; 32R2-FP64A: sw $7, 4($sp)
; 32R2-FP64A: ldc1 $[[T1:f[0-9]+]], 0($sp)
; 32R2-FP64A: sw $4, 0($sp)
; 32R2-FP64A: sw $5, 4($sp)
; 32R2-FP64A: ldc1 $[[T0:f[0-9]+]], 0($sp)
; 32R2-FP64A: sub.d $f0, $[[T0]], $[[T1]]
; 64-NO-FP64A: sub.d $f0, $f12, $f13
}
define double @move_from(double %d) {
%1 = call double @dbl()
%2 = call double @call2(i32 0, double %1)
ret double %2
; ALL-LABEL: move_from:
; 32R2-NO-FP64A-LE-DAG: mfc1 $6, $f0
; 32R2-NO-FP64A-LE-DAG: mfhc1 $7, $f0
; 32R2-NO-FP64A-BE-DAG: mfc1 $7, $f0
; 32R2-NO-FP64A-BE-DAG: mfhc1 $6, $f0
; 32R2-FP64A: addiu $sp, $sp, -32
; 32R2-FP64A: sdc1 $f0, 16($sp)
; 32R2-FP64A: lw $6, 16($sp)
; FIXME: This store is redundant
; 32R2-FP64A: sdc1 $f0, 16($sp)
; 32R2-FP64A: lw $7, 20($sp)
; 64-NO-FP64A: mov.d $f13, $f0
}