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riscv: Fix more comments

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Signed-off-by: Cosmin Truta <ctruta@gmail.com>
This commit is contained in:
Filip Wasil 2025-05-14 19:30:39 +02:00 committed by Cosmin Truta
parent 7108843467
commit 0e37c0b477
3 changed files with 8 additions and 13 deletions
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4
configure vendored
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@ -15605,9 +15605,9 @@ printf "%s\n" "$as_me: WARNING: --enable-riscv-rvv: please specify 'check' or 'a
fi fi
# Add RISCV-specific files to all builds where $host_cpu is arm ('riscv64*') or # Add RISCV-specific files to all builds where $host_cpu is RISC-V ('riscv64') or
# where RISCV optimizations were explicitly requested. (This allows a fallback # where RISCV optimizations were explicitly requested. (This allows a fallback
# if a future host CPU does not match 'riscv64*'.) # if a future host CPU does not match 'riscv64'.)
if test "$enable_riscv_rvv" != 'no' && if test "$enable_riscv_rvv" != 'no' &&
case "$host_cpu" in case "$host_cpu" in

4
contrib/riscv-rvv/README
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@ -1,5 +1,5 @@
OPERATING SYSTEM SPECIFIC ARM NEON DETECTION OPERATING SYSTEM SPECIFIC RISC-V RVV DETECTION
-------------------------------------------- ----------------------------------------------
Detection of the ability to execute RISC-V Vector on a RISC-V processor Detection of the ability to execute RISC-V Vector on a RISC-V processor
requires operating system support. (The information is not available in user requires operating system support. (The information is not available in user

13
riscv/riscv_init.c
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@ -1,4 +1,4 @@
/* arm_init.c - RISC-V Vector optimized filter functions /* riscv_init.c - RISC-V Vector optimized filter functions
* *
* Copyright (c) 2023 Google LLC * Copyright (c) 2023 Google LLC
* Written by Dragoș Tiselice <dtiselice@google.com>, May 2023. * Written by Dragoș Tiselice <dtiselice@google.com>, May 2023.
@ -53,16 +53,11 @@ static int png_have_rvv(png_structp png_ptr);
void void
png_init_filter_functions_rvv(png_structp pp, unsigned int bpp) png_init_filter_functions_rvv(png_structp pp, unsigned int bpp)
{ {
/* The switch statement is compiled in for RISCV_rvv_API, the call to /* The switch statement is compiled in for RISCV_RVV_API, the call to
* png_have_rvv is compiled in for RISCV_rvv_CHECK. If both are * png_have_rvv is compiled in for RISCV_RVV_CHECK. If both are
* defined the check is only performed if the API has not set the VECTOR * defined the check is only performed if the API has not set the VECTOR
* option on or off explicitly. In this case the check controls what * option on or off explicitly. In this case the check controls what
* happens. * happens.
*
* If the CHECK is not compiled in and the option is UNSET the behavior prior
* to 1.6.7 was to use the NEON code - this was a bug caused by having the
* wrong order of the 'ON' and 'default' cases. UNSET now defaults to OFF,
* as documented in png.h
*/ */
png_debug(1, "in png_init_filter_functions_rvv"); png_debug(1, "in png_init_filter_functions_rvv");
#ifdef PNG_RISCV_RVV_API_SUPPORTED #ifdef PNG_RISCV_RVV_API_SUPPORTED
@ -98,7 +93,7 @@ png_init_filter_functions_rvv(png_structp pp, unsigned int bpp)
/* Option turned on */ /* Option turned on */
break; break;
} }
#endif #endif /* PNG_RISCV_RVV_API_SUPPORTED */
/* IMPORTANT: any new external functions used here must be declared using /* IMPORTANT: any new external functions used here must be declared using
* PNG_INTERNAL_FUNCTION in ../pngpriv.h. This is required so that the * PNG_INTERNAL_FUNCTION in ../pngpriv.h. This is required so that the