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[RISCV] Support rv{32, 64}e in the compiler builtins #88252

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merged 2 commits into from
Apr 11, 2024
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[RISCV] Support rv{32, 64}e in the compiler builtins #88252

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b0c7608
Support rv{32, 64}e in the compiler builtins: Register spills (save/r…
xermicus Apr 10, 2024
7030c29
typo
xermicus Apr 10, 2024
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42 changes: 42 additions & 0 deletions compiler-rt/lib/builtins/riscv/restore.S
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Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,8 @@

#if __riscv_xlen == 32

#ifndef __riscv_32e

.globl __riscv_restore_12
.type __riscv_restore_12,@function
__riscv_restore_12:
Expand Down Expand Up @@ -86,8 +88,29 @@ __riscv_restore_0:
addi sp, sp, 16
ret

#else

.globl __riscv_restore_2
.type __riscv_restore_2,@function
.globl __riscv_restore_1
.type __riscv_restore_1,@function
.globl __riscv_restore_0
.type __riscv_restore_0,@function
__riscv_restore_2:
__riscv_restore_1:
__riscv_restore_0:
lw s1, 0(sp)
lw s0, 4(sp)
lw ra, 8(sp)
addi sp, sp, 12
ret

#endif

#elif __riscv_xlen == 64

#ifndef __riscv_64e

.globl __riscv_restore_12
.type __riscv_restore_12,@function
__riscv_restore_12:
Expand Down Expand Up @@ -161,6 +184,25 @@ __riscv_restore_0:
addi sp, sp, 16
ret

#else

.globl __riscv_restore_2
.type __riscv_restore_2,@function
.globl __riscv_restore_1
.type __riscv_restore_1,@function
.globl __riscv_restore_0
.type __riscv_restore_0,@function
__riscv_restore_2:
__riscv_restore_1:
__riscv_restore_0:
ld s1, 0(sp)
ld s0, 8(sp)
ld ra, 16(sp)
addi sp, sp, 24
ret

#endif

#else
# error "xlen must be 32 or 64 for save-restore implementation
#endif
42 changes: 42 additions & 0 deletions compiler-rt/lib/builtins/riscv/save.S
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,8 @@

#if __riscv_xlen == 32

#ifndef __riscv_32e

.globl __riscv_save_12
.type __riscv_save_12,@function
__riscv_save_12:
Expand Down Expand Up @@ -92,8 +94,29 @@ __riscv_save_0:
sw ra, 12(sp)
jr t0

#else

.globl __riscv_save_2
.type __riscv_save_2,@function
.globl __riscv_save_1
.type __riscv_save_1,@function
.globl __riscv_save_0
.type __riscv_save_0,@function
__riscv_save_2:
__riscv_save_1:
__riscv_save_0:
addi sp, sp, -12
sw s1, 0(sp)
sw s0, 4(sp)
sw ra, 8(sp)
jr t0

#endif

#elif __riscv_xlen == 64

#ifndef __riscv_64e

.globl __riscv_save_12
.type __riscv_save_12,@function
__riscv_save_12:
Expand Down Expand Up @@ -181,6 +204,25 @@ __riscv_save_0:
sd ra, 8(sp)
jr t0

#else

.globl __riscv_save_2
.type __riscv_save_2,@function
.globl __riscv_save_1
.type __riscv_save_1,@function
.globl __riscv_save_0
.type __riscv_save_0,@function
__riscv_save_2:
__riscv_save_1:
__riscv_save_0:
addi sp, sp, -24
sd s1, 0(sp)
sd s0, 8(sp)
sd ra, 16(sp)
jr t0

#endif

#else
# error "xlen must be 32 or 64 for save-restore implementation
#endif
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