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Diffstat (limited to 'chip/it83xx/it83xx_fpu.S')
| -rw-r--r-- | chip/it83xx/it83xx_fpu.S | 145 |
1 files changed, 0 insertions, 145 deletions
diff --git a/chip/it83xx/it83xx_fpu.S b/chip/it83xx/it83xx_fpu.S deleted file mode 100644 index 5265eb7253..0000000000 --- a/chip/it83xx/it83xx_fpu.S +++ /dev/null @@ -1,145 +0,0 @@ -/* Copyright 2017 The Chromium OS Authors. All rights reserved. - * Use of this source code is governed by a BSD-style license that can be - * found in the LICENSE file. - */ - -#include "config_chip.h" - -/* - * DLMB register = 0x80189: - * Disable all interrupts and switching CPU's - * ALU (Arithmetic Logic Unit) to floating point operation mode. - * (IEEE standard 754 floating point) - * - * DLMB register = 0x80009: - * Restore interrupts and ALU. - */ - .text - .align 2 - .global __addsf3 - .type __addsf3, @function -__addsf3: - sethi $r2, 0x80 /* r2 = 0x80000 */ - addi $r3, $r2, 0x189 /* r3 = 0x80189 */ - addi45 $r2, 0x9 /* r2 = 0x80009 */ - mtsr $r3, $dlmb /* dlmb = 0x80189 */ - dsb - /* Floating-point addition single-precision */ - add45 $r0, $r1 - mtsr $r2, $dlmb /* dlmb = 0x80009 */ - dsb - ret5 $lp - .size __addsf3, .-__addsf3 - - .text - .align 2 - .global __subsf3 - .type __subsf3, @function -__subsf3: - sethi $r2, 0x80 /* r2 = 0x80000 */ - addi $r3, $r2, 0x189 /* r3 = 0x80189 */ - addi45 $r2, 0x9 /* r2 = 0x80009 */ - mtsr $r3, $dlmb /* dlmb = 0x80189 */ - dsb - /* Floating-point subtraction single-precision */ - sub45 $r0, $r1 - mtsr $r2, $dlmb /* dlmb = 0x80009 */ - dsb - ret5 $lp - .size __subsf3, .-__subsf3 - - .text - .align 2 - .global __mulsf3 - .type __mulsf3, @function -__mulsf3: -#ifdef IT83XX_FPU_MUL_BY_DIV -#define SIGN $r2 -#define EXPOA $r3 -#define MANTA $r4 -#define VALUA $r5 -#define EXPOB $r6 -#define MANTB $r7 -#define VALUB $r8 -#define SPROD $r15 - /* save r6-r8 */ - smw.adm $r6, [$sp], $r8, #0x0 - xor SPROD, $r1, $r0 /* sign(A xor B) */ - move SIGN, #0x80000000 - and SPROD, SPROD, SIGN /* store sign bit */ - slli VALUA, $r0, 1 /* A<<1, (exponent and mantissa) */ - slli VALUB, $r1, 1 /* B<<1, (exponent and mantissa) */ - srli EXPOA, VALUA, 24 /* exponent(A) */ - srli EXPOB, VALUB, 24 /* exponent(B) */ - slli MANTA, VALUA, 7 /* A<<8, mantissa(A) with exponent's LSB */ - slli MANTB, VALUB, 7 /* A<<8, mantissa(B) with exponent's LSB */ - beqz VALUA, .LFzeroA /* exponent(A) and mantissa (A) are zero */ - beqc EXPOA, 0xff, .LFinfnanA /* A is inf or NaN */ - beqz VALUB, .LFzeroB /* exponent(B) and mantissa (B) are zero */ - beqc EXPOB, 0xff, .LFinfnanB /* B is inf or NaN */ - /* A*B = A/(1/B) */ - sethi $r2, 0x80 /* r2 = 0x80000 */ - addi $r3, $r2, 0x189 /* r3 = 0x80189 */ - addi45 $r2, 0x9 /* r2 = 0x80009 */ - mtsr $r3, $dlmb /* dlmb = 0x80189 */ - dsb - sethi $r5, #0x3f800 /* r5 = 1.0f */ - divsr $r1,$r1,$r5,$r1 /* r1 = 1.0f / r1 */ - divsr $r0,$r0,$r0,$r1 /* r0 = r0 / r1 */ - mtsr $r2, $dlmb /* dlmb = 0x80009 */ - dsb -.LFret: - /* restore r6-r8 */ - lmw.bim $r6, [$sp], $r8, #0x0 - ret5 $lp - -.LFzeroA: /* A is zero */ - beqc EXPOB, 0xff, .LFnan/*zero * inf = zero * NaN = NaN */ -.LFzero: - move $r0, SPROD /* return 0.0f or -0.0f */ - b .LFret -.LFinfnanA: /* exponent(A) is 0xff */ - bne MANTA, SIGN, .LFnan/* A is NaN: NaN * B = NaN */ - beqz VALUB, .LFnan /* A is inf and B is zero: inf * zero = NaN */ - bnec EXPOB, 0xff, .LFinf/* B is finite: inf * B = inf */ -.LFinfnanB: /* exponent(B) is 0xff */ - bne MANTB, SIGN, .LFnan/* B is NaN: A * NaN = NaN */ -.LFinf: - move $r0, #0x7f800000 - or $r0, $r0, SPROD /* return inf or -inf */ - b .LFret -.LFzeroB: /* B is zero and A is finit */ - b .LFzero /* B is zero */ -.LFnan: - move $r0, #0xffc00000 /* return NaN */ - b .LFret -#else /* !IT83XX_FPU_MUL_BY_DIV */ - sethi $r2, 0x80 /* r2 = 0x80000 */ - addi $r3, $r2, 0x189 /* r3 = 0x80189 */ - addi45 $r2, 0x9 /* r2 = 0x80009 */ - mtsr $r3, $dlmb /* dlmb = 0x80189 */ - dsb - /* Floating-point multiplication single-precision */ - mul33 $r0, $r1 - mtsr $r2, $dlmb /* dlmb = 0x80009 */ - dsb - ret5 $lp -#endif /* IT83XX_FPU_MUL_BY_DIV */ - .size __mulsf3, .-__mulsf3 - - .text - .align 2 - .global __divsf3 - .type __divsf3, @function -__divsf3: - sethi $r2, 0x80 /* r2 = 0x80000 */ - addi $r3, $r2, 0x189 /* r3 = 0x80189 */ - addi45 $r2, 0x9 /* r2 = 0x80009 */ - mtsr $r3, $dlmb /* dlmb = 0x80189 */ - dsb - /* Floating-point division single-precision */ - divsr $r0,$r0,$r0,$r1 - mtsr $r2, $dlmb /* dlmb = 0x80009 */ - dsb - ret5 $lp - .size __divsf3, .-__divsf3 |