diff options
Diffstat (limited to 'newlib/libc/machine/spu/stack_reg_va.S')
| -rw-r--r-- | newlib/libc/machine/spu/stack_reg_va.S | 170 |
1 files changed, 0 insertions, 170 deletions
diff --git a/newlib/libc/machine/spu/stack_reg_va.S b/newlib/libc/machine/spu/stack_reg_va.S deleted file mode 100644 index 754e4e6a7..000000000 --- a/newlib/libc/machine/spu/stack_reg_va.S +++ /dev/null @@ -1,170 +0,0 @@ -/* - Copyright (c) 2007, Toshiba Corporation - - All rights reserved. - - 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 names of Toshiba 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 THE COPYRIGHT OWNER OR CONTRIBUTORS 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. - */ -/* - * This file contains code use to construct a PIC, spu side, syscall - * function with variable parameters in accordance with the CBE ABI. - * - * This function is equivalent to constructing a va_list structure and - * calling the va_list form of the function. Therefore, for example, - * a printf function stack frame will look like this: - * - * | Stack | high memory - * | Parms | - * | | - * |------------| - * | Link Reg | - * |------------| - * | Back Chain |<-----. <---- input SP - * |------------| | - * | Reg 74 | | - * |------------| | - * | Reg 73 | | - * |------------| | - * // ... // | - * |------------| | - * | Reg 5 | | - * |------------| | - * | Reg 4 |<--. | - * |------------| | | - * va_list.| call_stack |------' - * |------------| | - * va_list.| next_arg |---' - * |------------| - * | format (r3)| <---- start of parameters - * |------------| |------------| - * | stack | | | - * | code | |(Back Chain)| <---- output SP - * | 1-3 qwords | <---- code_ptr `------------' - * `------------' - * low memory - * - * This was written in assembly so that it is smaller than what would - * be produced by using va_start. - */ - -#include "c99ppe.h" - -#define parms $2 /* Number of fixed arguments */ - -#define offset $67 -#define flag $68 -#define regdec $69 -#define link $70 - -#define code_ptr $71 -#define ptr $72 -#define inst $73 -#define tmp $74 - - .text - .global __stack_reg_va - .type __stack_reg_va, @function - -__stack_reg_va: - - /* Save registers 69-74 explicitly so that we have some - * working registers. - */ - stqd $74, 16*(-1)($sp) - stqd $73, 16*(-2)($sp) - stqd $72, 16*(-3)($sp) - stqd $71, 16*(-4)($sp) - stqd $70, 16*(-5)($sp) - stqd $69, 16*(-6)($sp) - - /* Construct self-modifying stack code that saves the remaining - * volatile registers onto the stack. - */ - il regdec, -1 /* for decrement register value in save instruction */ - shlqbyi regdec, regdec, 12 - il tmp, -(SPE_STACK_REGS+2+3)*16 - a code_ptr, $sp, tmp - lqr tmp, save_regs_1 /* store stack code */ - stqd tmp, 0(code_ptr) - lqr inst, save_regs_2 - ai ptr, $sp, 16*(-6) - sync - bisl link, code_ptr /* branch to the constructed stack code */ - - /* Adjust pointer so that it points to the first variable - * argument on the stack. - */ - ai offset, parms, -1 /* offset = parms - 1 */ - mpyi offset, offset, 16 /* offset = offset * 16 */ - a ptr, ptr, offset /* ptr = ptr + offset */ - - /* Store the va_list to the parameter list. - */ - stqd $sp, 16*(-1)(ptr) - stqd ptr, 16*(-2)(ptr) - - /* Make $3 store address. - */ - ai offset, parms, 2 /* offset = parms + 2 */ - mpyi offset, offset, -16 /* offset = offset * -16 */ - a ptr, ptr, offset /* ptr = ptr + offset */ - - /* Save all the fixed (non-variable arguments on the stack) - */ - ceqi flag, parms, 0x01 /* if(parms==1) flag=0xFFFFFFFF */ - brnz flag, reg_3 /* if(flag!=0) jump */ - ceqi flag, parms, 0x02 /* if(parms==2) flag=0xFFFFFFFF */ - brnz flag, reg_4 /* if(flag!=0) jump */ - stqd $5, 16*2(ptr) -reg_4: - stqd $4, 16*1(ptr) -reg_3: - stqd $3, 0(ptr) - - il $3, -16*(SPE_STACK_REGS+2+2) - stqx $sp, $3, $sp /* save back chain */ - a $sp, $sp, $3 - bi $0 /* return to caller */ - -/***************************** stack code *********************************************/ - - /* The following code is copied into the stack for re-entract, - * self-modified, code execution. This code copies the volatile - * registers into a va_list parameter array. - */ - .balignl 16, 0 -save_regs_1: - stqd inst, 16(code_ptr) /* store instruction */ - sync - a inst, inst, regdec /* decrement register number in the instruction */ - ceqbi tmp, inst, 3 /* if (reg-num == 3) tmp = 0x000000FF 000..0 */ -save_regs_2: - stqd $68, -16(ptr) - ai ptr, ptr, -16 - brz tmp, save_regs_1 /* if (tmp == 0) jump */ - bi link /* finish to make va_list */ - - .size __stack_reg_va, .-__stack_reg_va - |