void ff_int32_to_float_fmul_scalar_neon(float *dst, const int32_t *src,
float mul, int len);
+void ff_int32_to_float_fmul_scalar_vfp(float *dst, const int32_t *src,
+ float mul, int len);
+
void ff_float_to_int16_neon(int16_t *dst, const float *src, long len);
void ff_float_to_int16_interleave_neon(int16_t *, const float **, long, int);
int cpu_flags = av_get_cpu_flags();
if (have_vfp(cpu_flags) && have_armv6(cpu_flags)) {
+ if (!have_vfpv3(cpu_flags)) {
+ // This function doesn't use anything armv6 specific in itself,
+ // but ff_float_to_int16_vfp which is in the same assembly source
+ // file does, thus the whole file requires armv6 to be built.
+ c->int32_to_float_fmul_scalar = ff_int32_to_float_fmul_scalar_vfp;
+ }
+
c->float_to_int16 = ff_float_to_int16_vfp;
}
/*
* Copyright (c) 2008 Siarhei Siamashka <ssvb@users.sourceforge.net>
+ * Copyright (c) 2013 RISC OS Open Ltd <bavison@riscosopen.org>
*
* This file is part of Libav.
*
vpop {d8-d11}
pop {r4-r8,pc}
endfunc
+
+/**
+ * ARM VFP optimised int32 to float conversion.
+ * Assume len is a multiple of 8, destination buffer is at least 4 bytes aligned
+ * (16 bytes alignment is best for BCM2835), little-endian.
+ */
+@ void ff_int32_to_float_fmul_scalar_vfp(float *dst, const int32_t *src, float mul, int len)
+function ff_int32_to_float_fmul_scalar_vfp, export=1
+VFP tmp .req a4
+VFP len .req a3
+NOVFP tmp .req a3
+NOVFP len .req a4
+NOVFP vmov s0, a3
+ ldr tmp, =0x03070000 @ RunFast mode, short vectors of length 8, stride 1
+ fmrx ip, FPSCR
+ fmxr FPSCR, tmp
+1:
+ vldmia a2!, {s8-s15}
+ vcvt.f32.s32 s8, s8
+ vcvt.f32.s32 s9, s9
+ vcvt.f32.s32 s10, s10
+ vcvt.f32.s32 s11, s11
+ vcvt.f32.s32 s12, s12
+ vcvt.f32.s32 s13, s13
+ vcvt.f32.s32 s14, s14
+ vcvt.f32.s32 s15, s15
+ vmul.f32 s8, s8, s0
+ subs len, len, #8
+ vstmia a1!, {s8-s11}
+ vstmia a1!, {s12-s15}
+ bne 1b
+
+ fmxr FPSCR, ip
+ bx lr
+endfunc
+ .unreq tmp
+ .unreq len