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.global _switchStackInternal
.section .text
.def _switchStackInternal ; .scl 2 ; .type 32 ; .endef
_switchStackInternal:
// save callee-saved registers
push %rbp
movq %rsp, %rbp
push %rbx
push %r12
push %r13
push %r14
push %r15
push %rsi
push %rdi
sub $0x10, %rsp
movupd %xmm6, (%rsp)
sub $0x10, %rsp
movupd %xmm7, (%rsp)
sub $0x10, %rsp
movupd %xmm8, (%rsp)
sub $0x10, %rsp
movupd %xmm9, (%rsp)
sub $0x10, %rsp
movupd %xmm10, (%rsp)
sub $0x10, %rsp
movupd %xmm11, (%rsp)
sub $0x10, %rsp
movupd %xmm12, (%rsp)
sub $0x10, %rsp
movupd %xmm13, (%rsp)
sub $0x10, %rsp
movupd %xmm14, (%rsp)
sub $0x10, %rsp
movupd %xmm15, (%rsp)
// store SIMD floating point control word
sub $4, %rsp
stmxcsr (%rsp)
// store floating point control bytes
sub $4, %rsp
fstcw (%rsp)
// save the old stack pointer (second arg in rsi)
movq %rsp, (%rsi)
// set the new stack pointer (first arg in rdi)
movq %rdi, %rsp
// restore floating point control bytes
fnclex
fldcw (%rsp)
add $4, %rsp
// restore SIMD floating point control word
ldmxcsr (%rsp)
add $4, %rsp
// pop callee-saved registers
movupd (%rsp), %xmm15
add $0x10, %rsp
movupd (%rsp), %xmm14
add $0x10, %rsp
movupd (%rsp), %xmm13
add $0x10, %rsp
movupd (%rsp), %xmm12
add $0x10, %rsp
movupd (%rsp), %xmm11
add $0x10, %rsp
movupd (%rsp), %xmm10
add $0x10, %rsp
movupd (%rsp), %xmm9
add $0x10, %rsp
movupd (%rsp), %xmm8
add $0x10, %rsp
movupd (%rsp), %xmm7
add $0x10, %rsp
movupd (%rsp), %xmm6
add $0x10, %rsp
pop %rdi
pop %rsi
pop %r15
pop %r14
pop %r13
pop %r12
pop %rbx
pop %rbp
retq
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