Thank you to anyone who has already donated - your generous donations helped make three months of treatment possible.
My brother Nate continues to fight stage IV Hodgkin's lymphoma. He's just 31, with a wife and baby girl. They have no active income (since he's been unable to return to work), no insurance, and cannot afford the treatment he needs. Nate and his family need your help. Please consider a donation, every dollar helps. Thanks.
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diff --git a/apps/codecs/lib/udiv32_armv4.S b/apps/codecs/lib/udiv32_armv4.S index c4aea14..28f006f 100644 .global udiv32_arm .type udiv32_arm,%function +#if CONFIG_CPU == PP5020 +.set recip_max, 5952 +#elif CONFIG_CPU == PP5002 +.set recip_max, 1472 +#else +.set recip_max, 5440 +#endif + udiv32_arm: +#ifdef USE_IRAM + cmp r1, #recip_max + bhi .L_udiv + subs r2, r1, #3 + bcc .L_udiv_tiny + adr r3, .L_udiv_recip_table + ldr r2, [r3, r2, lsl #2] + mov r3, r0 + umull ip, r0, r2, r0 + mul r2, r0, r1 + cmp r3, r2 + bxcs lr + sub r0, r0, #1 + bx lr +.L_udiv_tiny: + cmp r1, #1 + movhi r0, r0, lsr #1 + bxcs lr + b .L_div0 +#endif +.L_udiv: /* Invert divisor. ARM_DIV_31_BODY uses adc to both subtract the divisor and add the next bit of the result. The correction code at .L_udiv32 does not need the divisor inverted, but can be modified to work with it, and this allows the zero divisor test to be done early and without an explicit comparison. */ rsbs r1, r1, #0 - beq .L_div0 tst r0, r0 +#ifndef USE_IRAM + beq .L_div0 +#endif /* High bit must be unset, otherwise shift numerator right, calculate, and correct results. As this case is very uncommon we want to avoid any other delays on the main path in handling it, so the long divide udiv32_arm: .L_div0: /* __div0 expects the calling address on the top of the stack */ stmdb sp!, { lr } + mov r0, #0 #if defined(__ARM_EABI__) || !defined(USE_IRAM) bl __div0 #else - mov lr, pc - bx r3 + ldr pc, [pc, #-4] + .word __div0 +#endif +#ifdef USE_IRAM +.L_udiv_recip_table: + .set div, 3 + .rept recip_max - 2 + .if (div - 1) & div + .set q, 0x40000000 / div + .set r, (0x40000000 - (q * div))<<1 + .set q, q << 1 + .if r >= div + .set q, q + 1 + .set r, r - div + .endif + .set r, r << 1 + .set q, q << 1 + .if r >= div + .set q, q + 1 + .set r, r - div + .endif + .set q, q + 1 + .else + .set q, 0x40000000 / div * 4 + .endif + .word q + .set div, div+1 + .endr #endif .size udiv32_arm, . - udiv32_arm |
