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Diffstat (limited to 'arch/powerpc/lib/ldstfp.S')
| -rw-r--r-- | arch/powerpc/lib/ldstfp.S | 375 |
1 files changed, 375 insertions, 0 deletions
diff --git a/arch/powerpc/lib/ldstfp.S b/arch/powerpc/lib/ldstfp.S new file mode 100644 index 000000000000..f6448636baf5 --- /dev/null +++ b/arch/powerpc/lib/ldstfp.S @@ -0,0 +1,375 @@ +/* + * Floating-point, VMX/Altivec and VSX loads and stores + * for use in instruction emulation. + * + * Copyright 2010 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#include <asm/processor.h> +#include <asm/ppc_asm.h> +#include <asm/ppc-opcode.h> +#include <asm/reg.h> +#include <asm/asm-offsets.h> +#include <linux/errno.h> + +#define STKFRM (PPC_MIN_STKFRM + 16) + + .macro extab instr,handler + .section __ex_table,"a" + PPC_LONG \instr,\handler + .previous + .endm + + .macro inst32 op +reg = 0 + .rept 32 +20: \op reg,0,r4 + b 3f + extab 20b,99f +reg = reg + 1 + .endr + .endm + +/* Get the contents of frN into fr0; N is in r3. */ +_GLOBAL(get_fpr) + mflr r0 + rlwinm r3,r3,3,0xf8 + bcl 20,31,1f + blr /* fr0 is already in fr0 */ + nop +reg = 1 + .rept 31 + fmr fr0,reg + blr +reg = reg + 1 + .endr +1: mflr r5 + add r5,r3,r5 + mtctr r5 + mtlr r0 + bctr + +/* Put the contents of fr0 into frN; N is in r3. */ +_GLOBAL(put_fpr) + mflr r0 + rlwinm r3,r3,3,0xf8 + bcl 20,31,1f + blr /* fr0 is already in fr0 */ + nop +reg = 1 + .rept 31 + fmr reg,fr0 + blr +reg = reg + 1 + .endr +1: mflr r5 + add r5,r3,r5 + mtctr r5 + mtlr r0 + bctr + +/* Load FP reg N from float at *p. N is in r3, p in r4. */ +_GLOBAL(do_lfs) + PPC_STLU r1,-STKFRM(r1) + mflr r0 + PPC_STL r0,STKFRM+PPC_LR_STKOFF(r1) + mfmsr r6 + ori r7,r6,MSR_FP + cmpwi cr7,r3,0 + mtmsrd r7 + isync + beq cr7,1f + stfd fr0,STKFRM-16(r1) +1: li r9,-EFAULT +2: lfs fr0,0(r4) + li r9,0 +3: bl put_fpr + beq cr7,4f + lfd fr0,STKFRM-16(r1) +4: PPC_LL r0,STKFRM+PPC_LR_STKOFF(r1) + mtlr r0 + mtmsrd r6 + isync + mr r3,r9 + addi r1,r1,STKFRM + blr + extab 2b,3b + +/* Load FP reg N from double at *p. N is in r3, p in r4. */ +_GLOBAL(do_lfd) + PPC_STLU r1,-STKFRM(r1) + mflr r0 + PPC_STL r0,STKFRM+PPC_LR_STKOFF(r1) + mfmsr r6 + ori r7,r6,MSR_FP + cmpwi cr7,r3,0 + mtmsrd r7 + isync + beq cr7,1f + stfd fr0,STKFRM-16(r1) +1: li r9,-EFAULT +2: lfd fr0,0(r4) + li r9,0 +3: beq cr7,4f + bl put_fpr + lfd fr0,STKFRM-16(r1) +4: PPC_LL r0,STKFRM+PPC_LR_STKOFF(r1) + mtlr r0 + mtmsrd r6 + isync + mr r3,r9 + addi r1,r1,STKFRM + blr + extab 2b,3b + +/* Store FP reg N to float at *p. N is in r3, p in r4. */ +_GLOBAL(do_stfs) + PPC_STLU r1,-STKFRM(r1) + mflr r0 + PPC_STL r0,STKFRM+PPC_LR_STKOFF(r1) + mfmsr r6 + ori r7,r6,MSR_FP + cmpwi cr7,r3,0 + mtmsrd r7 + isync + beq cr7,1f + stfd fr0,STKFRM-16(r1) + bl get_fpr +1: li r9,-EFAULT +2: stfs fr0,0(r4) + li r9,0 +3: beq cr7,4f + lfd fr0,STKFRM-16(r1) +4: PPC_LL r0,STKFRM+PPC_LR_STKOFF(r1) + mtlr r0 + mtmsrd r6 + isync + mr r3,r9 + addi r1,r1,STKFRM + blr + extab 2b,3b + +/* Store FP reg N to double at *p. N is in r3, p in r4. */ +_GLOBAL(do_stfd) + PPC_STLU r1,-STKFRM(r1) + mflr r0 + PPC_STL r0,STKFRM+PPC_LR_STKOFF(r1) + mfmsr r6 + ori r7,r6,MSR_FP + cmpwi cr7,r3,0 + mtmsrd r7 + isync + beq cr7,1f + stfd fr0,STKFRM-16(r1) + bl get_fpr +1: li r9,-EFAULT +2: stfd fr0,0(r4) + li r9,0 +3: beq cr7,4f + lfd fr0,STKFRM-16(r1) +4: PPC_LL r0,STKFRM+PPC_LR_STKOFF(r1) + mtlr r0 + mtmsrd r6 + isync + mr r3,r9 + addi r1,r1,STKFRM + blr + extab 2b,3b + +#ifdef CONFIG_ALTIVEC +/* Get the contents of vrN into vr0; N is in r3. */ +_GLOBAL(get_vr) + mflr r0 + rlwinm r3,r3,3,0xf8 + bcl 20,31,1f + blr /* vr0 is already in vr0 */ + nop +reg = 1 + .rept 31 + vor vr0,reg,reg /* assembler doesn't know vmr? */ + blr +reg = reg + 1 + .endr +1: mflr r5 + add r5,r3,r5 + mtctr r5 + mtlr r0 + bctr + +/* Put the contents of vr0 into vrN; N is in r3. */ +_GLOBAL(put_vr) + mflr r0 + rlwinm r3,r3,3,0xf8 + bcl 20,31,1f + blr /* vr0 is already in vr0 */ + nop +reg = 1 + .rept 31 + vor reg,vr0,vr0 + blr +reg = reg + 1 + .endr +1: mflr r5 + add r5,r3,r5 + mtctr r5 + mtlr r0 + bctr + +/* Load vector reg N from *p. N is in r3, p in r4. */ +_GLOBAL(do_lvx) + PPC_STLU r1,-STKFRM(r1) + mflr r0 + PPC_STL r0,STKFRM+PPC_LR_STKOFF(r1) + mfmsr r6 + oris r7,r6,MSR_VEC@h + cmpwi cr7,r3,0 + li r8,STKFRM-16 + mtmsrd r7 + isync + beq cr7,1f + stvx vr0,r1,r8 +1: li r9,-EFAULT +2: lvx vr0,0,r4 + li r9,0 +3: beq cr7,4f + bl put_vr + lvx vr0,r1,r8 +4: PPC_LL r0,STKFRM+PPC_LR_STKOFF(r1) + mtlr r0 + mtmsrd r6 + isync + mr r3,r9 + addi r1,r1,STKFRM + blr + extab 2b,3b + +/* Store vector reg N to *p. N is in r3, p in r4. */ +_GLOBAL(do_stvx) + PPC_STLU r1,-STKFRM(r1) + mflr r0 + PPC_STL r0,STKFRM+PPC_LR_STKOFF(r1) + mfmsr r6 + oris r7,r6,MSR_VEC@h + cmpwi cr7,r3,0 + li r8,STKFRM-16 + mtmsrd r7 + isync + beq cr7,1f + stvx vr0,r1,r8 + bl get_vr +1: li r9,-EFAULT +2: stvx vr0,0,r4 + li r9,0 +3: beq cr7,4f + lvx vr0,r1,r8 +4: PPC_LL r0,STKFRM+PPC_LR_STKOFF(r1) + mtlr r0 + mtmsrd r6 + isync + mr r3,r9 + addi r1,r1,STKFRM + blr + extab 2b,3b +#endif /* CONFIG_ALTIVEC */ + +#ifdef CONFIG_VSX +/* Get the contents of vsrN into vsr0; N is in r3. */ +_GLOBAL(get_vsr) + mflr r0 + rlwinm r3,r3,3,0x1f8 + bcl 20,31,1f + blr /* vsr0 is already in vsr0 */ + nop +reg = 1 + .rept 63 + XXLOR(0,reg,reg) + blr +reg = reg + 1 + .endr +1: mflr r5 + add r5,r3,r5 + mtctr r5 + mtlr r0 + bctr + +/* Put the contents of vsr0 into vsrN; N is in r3. */ +_GLOBAL(put_vsr) + mflr r0 + rlwinm r3,r3,3,0x1f8 + bcl 20,31,1f + blr /* vr0 is already in vr0 */ + nop +reg = 1 + .rept 63 + XXLOR(reg,0,0) + blr +reg = reg + 1 + .endr +1: mflr r5 + add r5,r3,r5 + mtctr r5 + mtlr r0 + bctr + +/* Load VSX reg N from vector doubleword *p. N is in r3, p in r4. */ +_GLOBAL(do_lxvd2x) + PPC_STLU r1,-STKFRM(r1) + mflr r0 + PPC_STL r0,STKFRM+PPC_LR_STKOFF(r1) + mfmsr r6 + oris r7,r6,MSR_VSX@h + cmpwi cr7,r3,0 + li r8,STKFRM-16 + mtmsrd r7 + isync + beq cr7,1f + STXVD2X(0,r1,r8) +1: li r9,-EFAULT +2: LXVD2X(0,0,r4) + li r9,0 +3: beq cr7,4f + bl put_vsr + LXVD2X(0,r1,r8) +4: PPC_LL r0,STKFRM+PPC_LR_STKOFF(r1) + mtlr r0 + mtmsrd r6 + isync + mr r3,r9 + addi r1,r1,STKFRM + blr + extab 2b,3b + +/* Store VSX reg N to vector doubleword *p. N is in r3, p in r4. */ +_GLOBAL(do_stxvd2x) + PPC_STLU r1,-STKFRM(r1) + mflr r0 + PPC_STL r0,STKFRM+PPC_LR_STKOFF(r1) + mfmsr r6 + oris r7,r6,MSR_VSX@h + cmpwi cr7,r3,0 + li r8,STKFRM-16 + mtmsrd r7 + isync + beq cr7,1f + STXVD2X(0,r1,r8) + bl get_vsr +1: li r9,-EFAULT +2: STXVD2X(0,0,r4) + li r9,0 +3: beq cr7,4f + LXVD2X(0,r1,r8) +4: PPC_LL r0,STKFRM+PPC_LR_STKOFF(r1) + mtlr r0 + mtmsrd r6 + isync + mr r3,r9 + addi r1,r1,STKFRM + blr + extab 2b,3b + +#endif /* CONFIG_VSX */ |