diff options
Diffstat (limited to 'runtime/arm/vararg.S')
| -rw-r--r-- | runtime/arm/vararg.S | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/runtime/arm/vararg.S b/runtime/arm/vararg.S new file mode 100644 index 0000000..8d431d3 --- /dev/null +++ b/runtime/arm/vararg.S @@ -0,0 +1,83 @@ +@ ***************************************************************** +@ +@ The Compcert verified compiler +@ +@ Xavier Leroy, INRIA Paris-Rocquencourt +@ +@ Copyright (c) 2013 Institut National de Recherche en Informatique et +@ en Automatique. +@ +@ Redistribution and use in source and binary forms, with or without +@ modification, are permitted provided that the following conditions are met: +@ * Redistributions of source code must retain the above copyright +@ notice, this list of conditions and the following disclaimer. +@ * Redistributions in binary form must reproduce the above copyright +@ notice, this list of conditions and the following disclaimer in the +@ documentation and/or other materials provided with the distribution. +@ * Neither the name of the <organization> nor the +@ names of its contributors may be used to endorse or promote products +@ derived from this software without specific prior written permission. +@ +@ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +@ "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +@ LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +@ A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT +@ HOLDER> BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, +@ EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, +@ PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR +@ PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF +@ LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING +@ NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +@ +@ ********************************************************************* + +@ Helper functions for variadic functions <stdarg.h>. ARM version + + .text + +@ typedef void * va_list; +@ unsigned int __compcert_va_int32(va_list * ap); +@ unsigned long long __compcert_va_int64(va_list * ap); +@ double __compcert_va_float64(va_list * ap); + + .global __compcert_va_int32 +__compcert_va_int32: + @ r0 = ap parameter + ldr r1, [r0, #0] @ r1 = pointer to next argument + add r1, r1, #4 @ advance ap by 4 + str r1, [r0, #0] + ldr r0, [r1, #-4] @ load next argument and return it in r0 + bx lr + .type __compcert_va_int32, %function + .size __compcert_va_int32, . - __compcert_va_int32 + + .global __compcert_va_int64 +__compcert_va_int64: + @ r0 = ap parameter + ldr r1, [r0, #0] @ r1 = pointer to next argument + add r1, r1, #15 @ 8-align and advance by 8 + bic r1, r1, #7 + str r1, [r0, #0] @ update ap + ldr r0, [r1, #-8] @ load next argument and return it in r0,r1 + ldr r1, [r1, #-4] + bx lr + .type __compcert_va_int64, %function + .size __compcert_va_int64, . - __compcert_va_int64 + + .global __compcert_va_float64 +__compcert_va_float64: + @ r0 = ap parameter + ldr r1, [r0, #0] @ r1 = pointer to next argument + add r1, r1, #15 @ 8-align and advance by 8 + bic r1, r1, #7 + str r1, [r0, #0] @ update ap +#ifdef VARIANT_hardfloat + fldd d0, [r1, #-8] @ load next argument and return it in d0 +#else + ldr r0, [r1, #-8] @ load next argument and return it in r0,r1 + ldr r1, [r1, #-4] +#endif + bx lr + .type __compcert_va_float64, %function + .size __compcert_va_float64, . - __compcert_va_float64 |