1 ; Test that the FP64A ABI performs double precision moves via a spill/reload.
2 ; The requirement is really that odd-numbered double precision registers do not
3 ; use mfc1/mtc1 to move the bottom 32-bits (because the hardware will redirect
4 ; this to the top 32-bits of the even register) but we have to make the decision
5 ; before register allocation so we do this for all double-precision values.
7 ; We don't test MIPS32r1 since support for 64-bit coprocessors (such as a 64-bit
8 ; FPU) on a 32-bit architecture was added in MIPS32r2.
10 ; RUN: not llc -march=mips -mcpu=mips32 -mattr=fp64 < %s 2>&1 | FileCheck %s -check-prefix=32R1-FP64
11 ; RUN: llc -march=mips -mcpu=mips32r2 -mattr=fp64 < %s | FileCheck %s -check-prefixes=ALL,32R2-NO-FP64A-BE
12 ; RUN: llc -march=mips -mcpu=mips32r2 -mattr=fp64,nooddspreg < %s | FileCheck %s -check-prefixes=ALL,32R2-FP64A
13 ; RUN: llc -march=mipsel -mcpu=mips32r2 -mattr=fp64 < %s | FileCheck %s -check-prefixes=ALL,32R2-NO-FP64A-LE
14 ; RUN: llc -march=mipsel -mcpu=mips32r2 -mattr=fp64,nooddspreg < %s | FileCheck %s -check-prefixes=ALL,32R2-FP64A
16 ; RUN: llc -march=mips64 -mcpu=mips64 -mattr=fp64 < %s | FileCheck %s -check-prefixes=ALL,64-NO-FP64A
17 ; RUN: not llc -march=mips64 -mcpu=mips64 -mattr=fp64,nooddspreg < %s 2>&1 | FileCheck %s -check-prefix=64-FP64A
18 ; RUN: llc -march=mips64el -mcpu=mips64 -mattr=fp64 < %s | FileCheck %s -check-prefixes=ALL,64-NO-FP64A
19 ; RUN: not llc -march=mips64el -mcpu=mips64 -mattr=fp64,nooddspreg < %s 2>&1 | FileCheck %s -check-prefix=64-FP64A
21 ; 32R1-FP64: LLVM ERROR: FPU with 64-bit registers is not available on MIPS32 pre revision 2. Use -mcpu=mips32r2 or greater.
22 ; 64-FP64A: LLVM ERROR: -mattr=+nooddspreg requires the O32 ABI.
24 declare double @dbl();
26 define double @call1(double %d, ...) {
31 ; 32R2-NO-FP64A-LE-NOT: addiu $sp, $sp
32 ; 32R2-NO-FP64A-LE: mtc1 $4, $f0
33 ; 32R2-NO-FP64A-LE: mthc1 $5, $f0
35 ; 32R2-NO-FP64A-BE-NOT: addiu $sp, $sp
36 ; 32R2-NO-FP64A-BE: mtc1 $5, $f0
37 ; 32R2-NO-FP64A-BE: mthc1 $4, $f0
39 ; 32R2-FP64A: addiu $sp, $sp, -8
40 ; 32R2-FP64A: sw $4, 0($sp)
41 ; 32R2-FP64A: sw $5, 4($sp)
42 ; 32R2-FP64A: ldc1 $f0, 0($sp)
44 ; 64-NO-FP64A: daddiu $sp, $sp, -64
45 ; 64-NO-FP64A: mov.d $f0, $f12
48 define double @call2(i32 %i, double %d) {
53 ; 32R2-NO-FP64A-LE: mtc1 $6, $f0
54 ; 32R2-NO-FP64A-LE: mthc1 $7, $f0
56 ; 32R2-NO-FP64A-BE: mtc1 $7, $f0
57 ; 32R2-NO-FP64A-BE: mthc1 $6, $f0
59 ; 32R2-FP64A: addiu $sp, $sp, -8
60 ; 32R2-FP64A: sw $6, 0($sp)
61 ; 32R2-FP64A: sw $7, 4($sp)
62 ; 32R2-FP64A: ldc1 $f0, 0($sp)
64 ; 64-NO-FP64A-NOT: daddiu $sp, $sp
65 ; 64-NO-FP64A: mov.d $f0, $f13
68 define double @call3(float %f1, float %f2, double %d) {
73 ; 32R2-NO-FP64A-LE: mtc1 $6, $f0
74 ; 32R2-NO-FP64A-LE: mthc1 $7, $f0
76 ; 32R2-NO-FP64A-BE: mtc1 $7, $f0
77 ; 32R2-NO-FP64A-BE: mthc1 $6, $f0
79 ; 32R2-FP64A: addiu $sp, $sp, -8
80 ; 32R2-FP64A: sw $6, 0($sp)
81 ; 32R2-FP64A: sw $7, 4($sp)
82 ; 32R2-FP64A: ldc1 $f0, 0($sp)
84 ; 64-NO-FP64A-NOT: daddiu $sp, $sp
85 ; 64-NO-FP64A: mov.d $f0, $f14
88 define double @call4(float %f, double %d, ...) {
93 ; 32R2-NO-FP64A-LE: mtc1 $6, $f0
94 ; 32R2-NO-FP64A-LE: mthc1 $7, $f0
96 ; 32R2-NO-FP64A-BE: mtc1 $7, $f0
97 ; 32R2-NO-FP64A-BE: mthc1 $6, $f0
99 ; 32R2-FP64A: addiu $sp, $sp, -8
100 ; 32R2-FP64A: sw $6, 0($sp)
101 ; 32R2-FP64A: sw $7, 4($sp)
102 ; 32R2-FP64A: ldc1 $f0, 0($sp)
104 ; 64-NO-FP64A: daddiu $sp, $sp, -48
105 ; 64-NO-FP64A: mov.d $f0, $f13
108 define double @call5(double %a, double %b, ...) {
109 %1 = fsub double %a, %b
114 ; 32R2-NO-FP64A-LE-DAG: mtc1 $4, $[[T0:f[0-9]+]]
115 ; 32R2-NO-FP64A-LE-DAG: mthc1 $5, $[[T0:f[0-9]+]]
116 ; 32R2-NO-FP64A-LE-DAG: mtc1 $6, $[[T1:f[0-9]+]]
117 ; 32R2-NO-FP64A-LE-DAG: mthc1 $7, $[[T1:f[0-9]+]]
118 ; 32R2-NO-FP64A-LE: sub.d $f0, $[[T0]], $[[T1]]
120 ; 32R2-NO-FP64A-BE-DAG: mtc1 $5, $[[T0:f[0-9]+]]
121 ; 32R2-NO-FP64A-BE-DAG: mthc1 $4, $[[T0:f[0-9]+]]
122 ; 32R2-NO-FP64A-BE-DAG: mtc1 $7, $[[T1:f[0-9]+]]
123 ; 32R2-NO-FP64A-BE-DAG: mthc1 $6, $[[T1:f[0-9]+]]
124 ; 32R2-NO-FP64A-BE: sub.d $f0, $[[T0]], $[[T1]]
126 ; 32R2-FP64A: addiu $sp, $sp, -8
127 ; 32R2-FP64A: sw $6, 0($sp)
128 ; 32R2-FP64A: sw $7, 4($sp)
129 ; 32R2-FP64A: ldc1 $[[T1:f[0-9]+]], 0($sp)
130 ; 32R2-FP64A: sw $4, 0($sp)
131 ; 32R2-FP64A: sw $5, 4($sp)
132 ; 32R2-FP64A: ldc1 $[[T0:f[0-9]+]], 0($sp)
133 ; 32R2-FP64A: sub.d $f0, $[[T0]], $[[T1]]
135 ; 64-NO-FP64A: sub.d $f0, $f12, $f13
138 define double @move_from(double %d) {
139 %1 = call double @dbl()
140 %2 = call double @call2(i32 0, double %1)
143 ; ALL-LABEL: move_from:
145 ; 32R2-NO-FP64A-LE-DAG: mfc1 $6, $f0
146 ; 32R2-NO-FP64A-LE-DAG: mfhc1 $7, $f0
148 ; 32R2-NO-FP64A-BE-DAG: mfc1 $7, $f0
149 ; 32R2-NO-FP64A-BE-DAG: mfhc1 $6, $f0
151 ; 32R2-FP64A: addiu $sp, $sp, -32
152 ; 32R2-FP64A: sdc1 $f0, 16($sp)
153 ; 32R2-FP64A: lw $6, 16($sp)
154 ; FIXME: This store is redundant
155 ; 32R2-FP64A: sdc1 $f0, 16($sp)
156 ; 32R2-FP64A: lw $7, 20($sp)
158 ; 64-NO-FP64A: mov.d $f13, $f0